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Added STM32 Rowley demo.

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Richard Barry 2010-06-04 14:45:49 +00:00
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Demo/CORTEX_STM32F103_GCC_Rowley/ST Library/src/stm32f10x_can.c Normal file
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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_can.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the CAN firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_can.h"
#include "stm32f10x_rcc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* CAN Master Control Register bits */
#define CAN_MCR_INRQ ((u32)0x00000001) /* Initialization request */
#define CAN_MCR_SLEEP ((u32)0x00000002) /* Sleep mode request */
#define CAN_MCR_TXFP ((u32)0x00000004) /* Transmit FIFO priority */
#define CAN_MCR_RFLM ((u32)0x00000008) /* Receive FIFO locked mode */
#define CAN_MCR_NART ((u32)0x00000010) /* No automatic retransmission */
#define CAN_MCR_AWUM ((u32)0x00000020) /* Automatic wake up mode */
#define CAN_MCR_ABOM ((u32)0x00000040) /* Automatic bus-off management */
#define CAN_MCR_TTCM ((u32)0x00000080) /* time triggered communication */
/* CAN Master Status Register bits */
#define CAN_MSR_INAK ((u32)0x00000001) /* Initialization acknowledge */
#define CAN_MSR_WKUI ((u32)0x00000008) /* Wake-up interrupt */
#define CAN_MSR_SLAKI ((u32)0x00000010) /* Sleep acknowledge interrupt */
/* CAN Transmit Status Register bits */
#define CAN_TSR_RQCP0 ((u32)0x00000001) /* Request completed mailbox0 */
#define CAN_TSR_TXOK0 ((u32)0x00000002) /* Transmission OK of mailbox0 */
#define CAN_TSR_ABRQ0 ((u32)0x00000080) /* Abort request for mailbox0 */
#define CAN_TSR_RQCP1 ((u32)0x00000100) /* Request completed mailbox1 */
#define CAN_TSR_TXOK1 ((u32)0x00000200) /* Transmission OK of mailbox1 */
#define CAN_TSR_ABRQ1 ((u32)0x00008000) /* Abort request for mailbox1 */
#define CAN_TSR_RQCP2 ((u32)0x00010000) /* Request completed mailbox2 */
#define CAN_TSR_TXOK2 ((u32)0x00020000) /* Transmission OK of mailbox2 */
#define CAN_TSR_ABRQ2 ((u32)0x00800000) /* Abort request for mailbox2 */
#define CAN_TSR_TME0 ((u32)0x04000000) /* Transmit mailbox 0 empty */
#define CAN_TSR_TME1 ((u32)0x08000000) /* Transmit mailbox 1 empty */
#define CAN_TSR_TME2 ((u32)0x10000000) /* Transmit mailbox 2 empty */
/* CAN Receive FIFO 0 Register bits */
#define CAN_RF0R_FULL0 ((u32)0x00000008) /* FIFO 0 full */
#define CAN_RF0R_FOVR0 ((u32)0x00000010) /* FIFO 0 overrun */
#define CAN_RF0R_RFOM0 ((u32)0x00000020) /* Release FIFO 0 output mailbox */
/* CAN Receive FIFO 1 Register bits */
#define CAN_RF1R_FULL1 ((u32)0x00000008) /* FIFO 1 full */
#define CAN_RF1R_FOVR1 ((u32)0x00000010) /* FIFO 1 overrun */
#define CAN_RF1R_RFOM1 ((u32)0x00000020) /* Release FIFO 1 output mailbox */
/* CAN Error Status Register bits */
#define CAN_ESR_EWGF ((u32)0x00000001) /* Error warning flag */
#define CAN_ESR_EPVF ((u32)0x00000002) /* Error passive flag */
#define CAN_ESR_BOFF ((u32)0x00000004) /* Bus-off flag */
/* CAN Mailbox Transmit Request */
#define CAN_TMIDxR_TXRQ ((u32)0x00000001) /* Transmit mailbox request */
/* CAN Filter Master Register bits */
#define CAN_FMR_FINIT ((u32)0x00000001) /* Filter init mode */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static ITStatus CheckITStatus(u32 CAN_Reg, u32 It_Bit);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : CAN_DeInit
* Description : Deinitializes the CAN peripheral registers to their default
* reset values.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_DeInit(void)
{
/* Enable CAN reset state */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_CAN, ENABLE);
/* Release CAN from reset state */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_CAN, DISABLE);
}
/*******************************************************************************
* Function Name : CAN_Init
* Description : Initializes the CAN peripheral according to the specified
* parameters in the CAN_InitStruct.
* Input : CAN_InitStruct: pointer to a CAN_InitTypeDef structure that
contains the configuration information for the CAN peripheral.
* Output : None.
* Return : Constant indicates initialization succeed which will be
* CANINITFAILED or CANINITOK.
*******************************************************************************/
u8 CAN_Init(CAN_InitTypeDef* CAN_InitStruct)
{
u8 InitStatus = 0;
u16 WaitAck;
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_TTCM));
assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_ABOM));
assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_AWUM));
assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_NART));
assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_RFLM));
assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_TXFP));
assert_param(IS_CAN_MODE(CAN_InitStruct->CAN_Mode));
assert_param(IS_CAN_SJW(CAN_InitStruct->CAN_SJW));
assert_param(IS_CAN_BS1(CAN_InitStruct->CAN_BS1));
assert_param(IS_CAN_BS2(CAN_InitStruct->CAN_BS2));
assert_param(IS_CAN_PRESCALER(CAN_InitStruct->CAN_Prescaler));
/* Request initialisation */
CAN->MCR = CAN_MCR_INRQ;
/* ...and check acknowledged */
if ((CAN->MSR & CAN_MSR_INAK) == 0)
{
InitStatus = CANINITFAILED;
}
else
{
/* Set the time triggered communication mode */
if (CAN_InitStruct->CAN_TTCM == ENABLE)
{
CAN->MCR |= CAN_MCR_TTCM;
}
else
{
CAN->MCR &= ~CAN_MCR_TTCM;
}
/* Set the automatic bus-off management */
if (CAN_InitStruct->CAN_ABOM == ENABLE)
{
CAN->MCR |= CAN_MCR_ABOM;
}
else
{
CAN->MCR &= ~CAN_MCR_ABOM;
}
/* Set the automatic wake-up mode */
if (CAN_InitStruct->CAN_AWUM == ENABLE)
{
CAN->MCR |= CAN_MCR_AWUM;
}
else
{
CAN->MCR &= ~CAN_MCR_AWUM;
}
/* Set the no automatic retransmission */
if (CAN_InitStruct->CAN_NART == ENABLE)
{
CAN->MCR |= CAN_MCR_NART;
}
else
{
CAN->MCR &= ~CAN_MCR_NART;
}
/* Set the receive FIFO locked mode */
if (CAN_InitStruct->CAN_RFLM == ENABLE)
{
CAN->MCR |= CAN_MCR_RFLM;
}
else
{
CAN->MCR &= ~CAN_MCR_RFLM;
}
/* Set the transmit FIFO priority */
if (CAN_InitStruct->CAN_TXFP == ENABLE)
{
CAN->MCR |= CAN_MCR_TXFP;
}
else
{
CAN->MCR &= ~CAN_MCR_TXFP;
}
/* Set the bit timing register */
CAN->BTR = (u32)((u32)CAN_InitStruct->CAN_Mode << 30) | ((u32)CAN_InitStruct->CAN_SJW << 24) |
((u32)CAN_InitStruct->CAN_BS1 << 16) | ((u32)CAN_InitStruct->CAN_BS2 << 20) |
((u32)CAN_InitStruct->CAN_Prescaler - 1);
InitStatus = CANINITOK;
/* Request leave initialisation */
CAN->MCR &= ~CAN_MCR_INRQ;
/* Wait the acknowledge */
for(WaitAck = 0x400; WaitAck > 0x0; WaitAck--)
{
}
/* ...and check acknowledged */
if ((CAN->MSR & CAN_MSR_INAK) == CAN_MSR_INAK)
{
InitStatus = CANINITFAILED;
}
}
/* At this step, return the status of initialization */
return InitStatus;
}
/*******************************************************************************
* Function Name : CAN_FilterInit
* Description : Initializes the CAN peripheral according to the specified
* parameters in the CAN_FilterInitStruct.
* Input : CAN_FilterInitStruct: pointer to a CAN_FilterInitTypeDef
* structure that contains the configuration information.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_FilterInit(CAN_FilterInitTypeDef* CAN_FilterInitStruct)
{
u16 FilterNumber_BitPos = 0;
/* Check the parameters */
assert_param(IS_CAN_FILTER_NUMBER(CAN_FilterInitStruct->CAN_FilterNumber));
assert_param(IS_CAN_FILTER_MODE(CAN_FilterInitStruct->CAN_FilterMode));
assert_param(IS_CAN_FILTER_SCALE(CAN_FilterInitStruct->CAN_FilterScale));
assert_param(IS_CAN_FILTER_FIFO(CAN_FilterInitStruct->CAN_FilterFIFOAssignment));
assert_param(IS_FUNCTIONAL_STATE(CAN_FilterInitStruct->CAN_FilterActivation));
FilterNumber_BitPos =
(u16)((u16)0x0001 << ((u16)CAN_FilterInitStruct->CAN_FilterNumber));
/* Initialisation mode for the filter */
CAN->FMR |= CAN_FMR_FINIT;
/* Filter Deactivation */
CAN->FA1R &= ~(u32)FilterNumber_BitPos;
/* Filter Scale */
if (CAN_FilterInitStruct->CAN_FilterScale == CAN_FilterScale_16bit)
{
/* 16-bit scale for the filter */
CAN->FS1R &= ~(u32)FilterNumber_BitPos;
/* First 16-bit identifier and First 16-bit mask */
/* Or First 16-bit identifier and Second 16-bit identifier */
CAN->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR1 =
((u32)((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterMaskIdLow) << 16) |
((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterIdLow);
/* Second 16-bit identifier and Second 16-bit mask */
/* Or Third 16-bit identifier and Fourth 16-bit identifier */
CAN->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR2 =
((u32)((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterMaskIdHigh) << 16) |
((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterIdHigh);
}
if (CAN_FilterInitStruct->CAN_FilterScale == CAN_FilterScale_32bit)
{
/* 32-bit scale for the filter */
CAN->FS1R |= FilterNumber_BitPos;
/* 32-bit identifier or First 32-bit identifier */
CAN->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR1 =
((u32)((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterIdHigh) << 16) |
((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterIdLow);
/* 32-bit mask or Second 32-bit identifier */
CAN->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR2 =
((u32)((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterMaskIdHigh) << 16) |
((u32)0x0000FFFF & CAN_FilterInitStruct->CAN_FilterMaskIdLow);
}
/* Filter Mode */
if (CAN_FilterInitStruct->CAN_FilterMode == CAN_FilterMode_IdMask)
{
/*Id/Mask mode for the filter*/
CAN->FM1R &= ~(u32)FilterNumber_BitPos;
}
else /* CAN_FilterInitStruct->CAN_FilterMode == CAN_FilterMode_IdList */
{
/*Identifier list mode for the filter*/
CAN->FM1R |= (u32)FilterNumber_BitPos;
}
/* Filter FIFO assignment */
if (CAN_FilterInitStruct->CAN_FilterFIFOAssignment == CAN_FilterFIFO0)
{
/* FIFO 0 assignation for the filter */
CAN->FFA1R &= ~(u32)FilterNumber_BitPos;
}
if (CAN_FilterInitStruct->CAN_FilterFIFOAssignment == CAN_FilterFIFO1)
{
/* FIFO 1 assignation for the filter */
CAN->FFA1R |= (u32)FilterNumber_BitPos;
}
/* Filter activation */
if (CAN_FilterInitStruct->CAN_FilterActivation == ENABLE)
{
CAN->FA1R |= FilterNumber_BitPos;
}
/* Leave the initialisation mode for the filter */
CAN->FMR &= ~CAN_FMR_FINIT;
}
/*******************************************************************************
* Function Name : CAN_StructInit
* Description : Fills each CAN_InitStruct member with its default value.
* Input : CAN_InitStruct: pointer to a CAN_InitTypeDef structure which
* will be initialized.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_StructInit(CAN_InitTypeDef* CAN_InitStruct)
{
/* Reset CAN init structure parameters values */
/* Initialize the time triggered communication mode */
CAN_InitStruct->CAN_TTCM = DISABLE;
/* Initialize the automatic bus-off management */
CAN_InitStruct->CAN_ABOM = DISABLE;
/* Initialize the automatic wake-up mode */
CAN_InitStruct->CAN_AWUM = DISABLE;
/* Initialize the no automatic retransmission */
CAN_InitStruct->CAN_NART = DISABLE;
/* Initialize the receive FIFO locked mode */
CAN_InitStruct->CAN_RFLM = DISABLE;
/* Initialize the transmit FIFO priority */
CAN_InitStruct->CAN_TXFP = DISABLE;
/* Initialize the CAN_Mode member */
CAN_InitStruct->CAN_Mode = CAN_Mode_Normal;
/* Initialize the CAN_SJW member */
CAN_InitStruct->CAN_SJW = CAN_SJW_1tq;
/* Initialize the CAN_BS1 member */
CAN_InitStruct->CAN_BS1 = CAN_BS1_4tq;
/* Initialize the CAN_BS2 member */
CAN_InitStruct->CAN_BS2 = CAN_BS2_3tq;
/* Initialize the CAN_Prescaler member */
CAN_InitStruct->CAN_Prescaler = 1;
}
/*******************************************************************************
* Function Name : CAN_ITConfig
* Description : Enables or disables the specified CAN interrupts.
* Input : - CAN_IT: specifies the CAN interrupt sources to be enabled or
* disabled.
* This parameter can be: CAN_IT_TME, CAN_IT_FMP0, CAN_IT_FF0,
* CAN_IT_FOV0, CAN_IT_FMP1, CAN_IT_FF1,
* CAN_IT_FOV1, CAN_IT_EWG, CAN_IT_EPV,
* CAN_IT_LEC, CAN_IT_ERR, CAN_IT_WKU or
* CAN_IT_SLK.
* - NewState: new state of the CAN interrupts.
* This parameter can be: ENABLE or DISABLE.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_ITConfig(u32 CAN_IT, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_CAN_ITConfig(CAN_IT));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected CAN interrupt */
CAN->IER |= CAN_IT;
}
else
{
/* Disable the selected CAN interrupt */
CAN->IER &= ~CAN_IT;
}
}
/*******************************************************************************
* Function Name : CAN_Transmit
* Description : Initiates the transmission of a message.
* Input : TxMessage: pointer to a structure which contains CAN Id, CAN
* DLC and CAN datas.
* Output : None.
* Return : The number of the mailbox that is used for transmission
* or CAN_NO_MB if there is no empty mailbox.
*******************************************************************************/
u8 CAN_Transmit(CanTxMsg* TxMessage)
{
u8 TransmitMailbox = 0;
/* Check the parameters */
assert_param(IS_CAN_STDID(TxMessage->StdId));
assert_param(IS_CAN_EXTID(TxMessage->StdId));
assert_param(IS_CAN_IDTYPE(TxMessage->IDE));
assert_param(IS_CAN_RTR(TxMessage->RTR));
assert_param(IS_CAN_DLC(TxMessage->DLC));
/* Select one empty transmit mailbox */
if ((CAN->TSR&CAN_TSR_TME0) == CAN_TSR_TME0)
{
TransmitMailbox = 0;
}
else if ((CAN->TSR&CAN_TSR_TME1) == CAN_TSR_TME1)
{
TransmitMailbox = 1;
}
else if ((CAN->TSR&CAN_TSR_TME2) == CAN_TSR_TME2)
{
TransmitMailbox = 2;
}
else
{
TransmitMailbox = CAN_NO_MB;
}
if (TransmitMailbox != CAN_NO_MB)
{
/* Set up the Id */
CAN->sTxMailBox[TransmitMailbox].TIR &= CAN_TMIDxR_TXRQ;
if (TxMessage->IDE == CAN_ID_STD)
{
TxMessage->StdId &= (u32)0x000007FF;
TxMessage->StdId = TxMessage->StdId << 21;
CAN->sTxMailBox[TransmitMailbox].TIR |= (TxMessage->StdId | TxMessage->IDE |
TxMessage->RTR);
}
else
{
TxMessage->ExtId &= (u32)0x1FFFFFFF;
TxMessage->ExtId <<= 3;
CAN->sTxMailBox[TransmitMailbox].TIR |= (TxMessage->ExtId | TxMessage->IDE |
TxMessage->RTR);
}
/* Set up the DLC */
TxMessage->DLC &= (u8)0x0000000F;
CAN->sTxMailBox[TransmitMailbox].TDTR &= (u32)0xFFFFFFF0;
CAN->sTxMailBox[TransmitMailbox].TDTR |= TxMessage->DLC;
/* Set up the data field */
CAN->sTxMailBox[TransmitMailbox].TDLR = (((u32)TxMessage->Data[3] << 24) |
((u32)TxMessage->Data[2] << 16) |
((u32)TxMessage->Data[1] << 8) |
((u32)TxMessage->Data[0]));
CAN->sTxMailBox[TransmitMailbox].TDHR = (((u32)TxMessage->Data[7] << 24) |
((u32)TxMessage->Data[6] << 16) |
((u32)TxMessage->Data[5] << 8) |
((u32)TxMessage->Data[4]));
/* Request transmission */
CAN->sTxMailBox[TransmitMailbox].TIR |= CAN_TMIDxR_TXRQ;
}
return TransmitMailbox;
}
/*******************************************************************************
* Function Name : CAN_TransmitStatus
* Description : Checks the transmission of a message.
* Input : TransmitMailbox: the number of the mailbox that is used for
* transmission.
* Output : None.
* Return : CANTXOK if the CAN driver transmits the message, CANTXFAILED
* in an other case.
*******************************************************************************/
u8 CAN_TransmitStatus(u8 TransmitMailbox)
{
/* RQCP, TXOK and TME bits */
u8 State = 0;
/* Check the parameters */
assert_param(IS_CAN_TRANSMITMAILBOX(TransmitMailbox));
switch (TransmitMailbox)
{
case (0): State |= (u8)((CAN->TSR & CAN_TSR_RQCP0) << 2);
State |= (u8)((CAN->TSR & CAN_TSR_TXOK0) >> 0);
State |= (u8)((CAN->TSR & CAN_TSR_TME0) >> 26);
break;
case (1): State |= (u8)((CAN->TSR & CAN_TSR_RQCP1) >> 6);
State |= (u8)((CAN->TSR & CAN_TSR_TXOK1) >> 8);
State |= (u8)((CAN->TSR & CAN_TSR_TME1) >> 27);
break;
case (2): State |= (u8)((CAN->TSR & CAN_TSR_RQCP2) >> 14);
State |= (u8)((CAN->TSR & CAN_TSR_TXOK2) >> 16);
State |= (u8)((CAN->TSR & CAN_TSR_TME2) >> 28);
break;
default:
State = CANTXFAILED;
break;
}
switch (State)
{
/* transmit pending */
case (0x0): State = CANTXPENDING;
break;
/* transmit failed */
case (0x5): State = CANTXFAILED;
break;
/* transmit succedeed */
case (0x7): State = CANTXOK;
break;
default:
State = CANTXFAILED;
break;
}
return State;
}
/*******************************************************************************
* Function Name : CAN_CancelTransmit
* Description : Cancels a transmit request.
* Input : Mailbox number.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_CancelTransmit(u8 Mailbox)
{
/* Check the parameters */
assert_param(IS_CAN_TRANSMITMAILBOX(Mailbox));
/* abort transmission */
switch (Mailbox)
{
case (0): CAN->TSR |= CAN_TSR_ABRQ0;
break;
case (1): CAN->TSR |= CAN_TSR_ABRQ1;
break;
case (2): CAN->TSR |= CAN_TSR_ABRQ2;
break;
default:
break;
}
}
/*******************************************************************************
* Function Name : CAN_FIFORelease
* Description : Releases a FIFO.
* Input : FIFONumber: FIFO to release, CAN_FIFO0 or CAN_FIFO1.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_FIFORelease(u8 FIFONumber)
{
/* Check the parameters */
assert_param(IS_CAN_FIFO(FIFONumber));
/* Release FIFO0 */
if (FIFONumber == CAN_FIFO0)
{
CAN->RF0R = CAN_RF0R_RFOM0;
}
/* Release FIFO1 */
else /* FIFONumber == CAN_FIFO1 */
{
CAN->RF1R = CAN_RF1R_RFOM1;
}
}
/*******************************************************************************
* Function Name : CAN_MessagePending
* Description : Returns the number of pending messages.
* Input : FIFONumber: Receive FIFO number, CAN_FIFO0 or CAN_FIFO1.
* Output : None.
* Return : NbMessage which is the number of pending message.
*******************************************************************************/
u8 CAN_MessagePending(u8 FIFONumber)
{
u8 MessagePending=0;
/* Check the parameters */
assert_param(IS_CAN_FIFO(FIFONumber));
if (FIFONumber == CAN_FIFO0)
{
MessagePending = (u8)(CAN->RF0R&(u32)0x03);
}
else if (FIFONumber == CAN_FIFO1)
{
MessagePending = (u8)(CAN->RF1R&(u32)0x03);
}
else
{
MessagePending = 0;
}
return MessagePending;
}
/*******************************************************************************
* Function Name : CAN_Receive
* Description : Receives a message.
* Input : FIFONumber: Receive FIFO number, CAN_FIFO0 or CAN_FIFO1.
* Output : RxMessage: pointer to a structure which contains CAN Id,
* CAN DLC, CAN datas and FMI number.
* Return : None.
*******************************************************************************/
void CAN_Receive(u8 FIFONumber, CanRxMsg* RxMessage)
{
/* Check the parameters */
assert_param(IS_CAN_FIFO(FIFONumber));
/* Get the Id */
RxMessage->IDE = (u8)0x04 & CAN->sFIFOMailBox[FIFONumber].RIR;
if (RxMessage->IDE == CAN_ID_STD)
{
RxMessage->StdId = (u32)0x000007FF & (CAN->sFIFOMailBox[FIFONumber].RIR >> 21);
}
else
{
RxMessage->ExtId = (u32)0x1FFFFFFF & (CAN->sFIFOMailBox[FIFONumber].RIR >> 3);
}
RxMessage->RTR = (u8)0x02 & CAN->sFIFOMailBox[FIFONumber].RIR;
/* Get the DLC */
RxMessage->DLC = (u8)0x0F & CAN->sFIFOMailBox[FIFONumber].RDTR;
/* Get the FMI */
RxMessage->FMI = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDTR >> 8);
/* Get the data field */
RxMessage->Data[0] = (u8)0xFF & CAN->sFIFOMailBox[FIFONumber].RDLR;
RxMessage->Data[1] = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDLR >> 8);
RxMessage->Data[2] = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDLR >> 16);
RxMessage->Data[3] = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDLR >> 24);
RxMessage->Data[4] = (u8)0xFF & CAN->sFIFOMailBox[FIFONumber].RDHR;
RxMessage->Data[5] = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDHR >> 8);
RxMessage->Data[6] = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDHR >> 16);
RxMessage->Data[7] = (u8)0xFF & (CAN->sFIFOMailBox[FIFONumber].RDHR >> 24);
/* Release the FIFO */
CAN_FIFORelease(FIFONumber);
}
/*******************************************************************************
* Function Name : CAN_Sleep
* Description : Enters the low power mode.
* Input : None.
* Output : None.
* Return : CANSLEEPOK if sleep entered, CANSLEEPFAILED in an other case.
*******************************************************************************/
u8 CAN_Sleep(void)
{
u8 SleepStatus = 0;
/* Sleep mode entering request */
CAN->MCR |= CAN_MCR_SLEEP;
SleepStatus = CANSLEEPOK;
/* Sleep mode status */
if ((CAN->MCR&CAN_MCR_SLEEP) == 0)
{
/* Sleep mode not entered */
SleepStatus = CANSLEEPFAILED;
}
/* At this step, sleep mode status */
return SleepStatus;
}
/*******************************************************************************
* Function Name : CAN_WakeUp
* Description : Wakes the CAN up.
* Input : None.
* Output : None.
* Return : CANWAKEUPOK if sleep mode left, CANWAKEUPFAILED in an other
* case.
*******************************************************************************/
u8 CAN_WakeUp(void)
{
u8 WakeUpStatus = 0;
/* Wake up request */
CAN->MCR &= ~CAN_MCR_SLEEP;
WakeUpStatus = CANWAKEUPFAILED;
/* Sleep mode status */
if ((CAN->MCR&CAN_MCR_SLEEP) == 0)
{
/* Sleep mode exited */
WakeUpStatus = CANWAKEUPOK;
}
/* At this step, sleep mode status */
return WakeUpStatus;
}
/*******************************************************************************
* Function Name : CAN_GetFlagStatus
* Description : Checks whether the specified CAN flag is set or not.
* Input : CAN_FLAG: specifies the flag to check.
* This parameter can be: CAN_FLAG_EWG, CAN_FLAG_EPV or
* CAN_FLAG_BOF.
* Output : None.
* Return : The new state of CAN_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus CAN_GetFlagStatus(u32 CAN_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_CAN_FLAG(CAN_FLAG));
/* Check the status of the specified CAN flag */
if ((CAN->ESR & CAN_FLAG) != (u32)RESET)
{
/* CAN_FLAG is set */
bitstatus = SET;
}
else
{
/* CAN_FLAG is reset */
bitstatus = RESET;
}
/* Return the CAN_FLAG status */
return bitstatus;
}
/*******************************************************************************
* Function Name : CAN_ClearFlag
* Description : Clears the CAN's pending flags.
* Input : CAN_FLAG: specifies the flag to clear.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_ClearFlag(u32 CAN_FLAG)
{
/* Check the parameters */
assert_param(IS_CAN_FLAG(CAN_FLAG));
/* Clear the selected CAN flags */
CAN->ESR &= ~CAN_FLAG;
}
/*******************************************************************************
* Function Name : CAN_GetITStatus
* Description : Checks whether the specified CAN interrupt has occurred or
* not.
* Input : CAN_IT: specifies the CAN interrupt source to check.
* This parameter can be: CAN_IT_RQCP0, CAN_IT_RQCP1, CAN_IT_RQCP2,
* CAN_IT_FF0, CAN_IT_FOV0, CAN_IT_FF1,
* CAN_IT_FOV1, CAN_IT_EWG, CAN_IT_EPV,
* CAN_IT_BOF, CAN_IT_WKU or CAN_IT_SLK.
* Output : None.
* Return : The new state of CAN_IT (SET or RESET).
*******************************************************************************/
ITStatus CAN_GetITStatus(u32 CAN_IT)
{
ITStatus pendingbitstatus = RESET;
/* Check the parameters */
assert_param(IS_CAN_ITStatus(CAN_IT));
switch (CAN_IT)
{
case CAN_IT_RQCP0:
pendingbitstatus = CheckITStatus(CAN->TSR, CAN_TSR_RQCP0);
break;
case CAN_IT_RQCP1:
pendingbitstatus = CheckITStatus(CAN->TSR, CAN_TSR_RQCP1);
break;
case CAN_IT_RQCP2:
pendingbitstatus = CheckITStatus(CAN->TSR, CAN_TSR_RQCP2);
break;
case CAN_IT_FF0:
pendingbitstatus = CheckITStatus(CAN->RF0R, CAN_RF0R_FULL0);
break;
case CAN_IT_FOV0:
pendingbitstatus = CheckITStatus(CAN->RF0R, CAN_RF0R_FOVR0);
break;
case CAN_IT_FF1:
pendingbitstatus = CheckITStatus(CAN->RF1R, CAN_RF1R_FULL1);
break;
case CAN_IT_FOV1:
pendingbitstatus = CheckITStatus(CAN->RF1R, CAN_RF1R_FOVR1);
break;
case CAN_IT_EWG:
pendingbitstatus = CheckITStatus(CAN->ESR, CAN_ESR_EWGF);
break;
case CAN_IT_EPV:
pendingbitstatus = CheckITStatus(CAN->ESR, CAN_ESR_EPVF);
break;
case CAN_IT_BOF:
pendingbitstatus = CheckITStatus(CAN->ESR, CAN_ESR_BOFF);
break;
case CAN_IT_SLK:
pendingbitstatus = CheckITStatus(CAN->MSR, CAN_MSR_SLAKI);
break;
case CAN_IT_WKU:
pendingbitstatus = CheckITStatus(CAN->MSR, CAN_MSR_WKUI);
break;
default :
pendingbitstatus = RESET;
break;
}
/* Return the CAN_IT status */
return pendingbitstatus;
}
/*******************************************************************************
* Function Name : CAN_ClearITPendingBit
* Description : Clears the CAN’s interrupt pending bits.
* Input : CAN_IT: specifies the interrupt pending bit to clear.
* Output : None.
* Return : None.
*******************************************************************************/
void CAN_ClearITPendingBit(u32 CAN_IT)
{
/* Check the parameters */
assert_param(IS_CAN_ITStatus(CAN_IT));
switch (CAN_IT)
{
case CAN_IT_RQCP0:
CAN->TSR = CAN_TSR_RQCP0; /* rc_w1*/
break;
case CAN_IT_RQCP1:
CAN->TSR = CAN_TSR_RQCP1; /* rc_w1*/
break;
case CAN_IT_RQCP2:
CAN->TSR = CAN_TSR_RQCP2; /* rc_w1*/
break;
case CAN_IT_FF0:
CAN->RF0R = CAN_RF0R_FULL0; /* rc_w1*/
break;
case CAN_IT_FOV0:
CAN->RF0R = CAN_RF0R_FOVR0; /* rc_w1*/
break;
case CAN_IT_FF1:
CAN->RF1R = CAN_RF1R_FULL1; /* rc_w1*/
break;
case CAN_IT_FOV1:
CAN->RF1R = CAN_RF1R_FOVR1; /* rc_w1*/
break;
case CAN_IT_EWG:
CAN->ESR &= ~ CAN_ESR_EWGF; /* rw */
break;
case CAN_IT_EPV:
CAN->ESR &= ~ CAN_ESR_EPVF; /* rw */
break;
case CAN_IT_BOF:
CAN->ESR &= ~ CAN_ESR_BOFF; /* rw */
break;
case CAN_IT_WKU:
CAN->MSR = CAN_MSR_WKUI; /* rc_w1*/
break;
case CAN_IT_SLK:
CAN->MSR = CAN_MSR_SLAKI; /* rc_w1*/
break;
default :
break;
}
}
/*******************************************************************************
* Function Name : CheckITStatus
* Description : Checks whether the CAN interrupt has occurred or not.
* Input : CAN_Reg: specifies the CAN interrupt register to check.
* It_Bit: specifies the interrupt source bit to check.
* Output : None.
* Return : The new state of the CAN Interrupt (SET or RESET).
*******************************************************************************/
static ITStatus CheckITStatus(u32 CAN_Reg, u32 It_Bit)
{
ITStatus pendingbitstatus = RESET;
if ((CAN_Reg & It_Bit) != (u32)RESET)
{
/* CAN_IT is set */
pendingbitstatus = SET;
}
else
{
/* CAN_IT is reset */
pendingbitstatus = RESET;
}
return pendingbitstatus;
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_gpio.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the GPIO firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* ------------ RCC registers bit address in the alias region ----------- */
#define AFIO_OFFSET (AFIO_BASE - PERIPH_BASE)
/* --- EVENTCR Register ---*/
/* Alias word address of EVOE bit */
#define EVCR_OFFSET (AFIO_OFFSET + 0x00)
#define EVOE_BitNumber ((u8)0x07)
#define EVCR_EVOE_BB (PERIPH_BB_BASE + (EVCR_OFFSET * 32) + (EVOE_BitNumber * 4))
#define EVCR_PORTPINCONFIG_MASK ((u16)0xFF80)
#define LSB_MASK ((u16)0xFFFF)
#define DBGAFR_POSITION_MASK ((u32)0x000F0000)
#define DBGAFR_SWJCFG_MASK ((u32)0xF0FFFFFF)
#define DBGAFR_LOCATION_MASK ((u32)0x00200000)
#define DBGAFR_NUMBITS_MASK ((u32)0x00100000)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : GPIO_DeInit
* Description : Deinitializes the GPIOx peripheral registers to their default
* reset values.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_DeInit(GPIO_TypeDef* GPIOx)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
switch (*(u32*)&GPIOx)
{
case GPIOA_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, DISABLE);
break;
case GPIOB_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, DISABLE);
break;
case GPIOC_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE);
break;
case GPIOD_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, DISABLE);
break;
case GPIOE_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE);
break;
case GPIOF_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, DISABLE);
break;
case GPIOG_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, DISABLE);
break;
default:
break;
}
}
/*******************************************************************************
* Function Name : GPIO_AFIODeInit
* Description : Deinitializes the Alternate Functions (remap, event control
* and EXTI configuration) registers to their default reset
* values.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_AFIODeInit(void)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE);
}
/*******************************************************************************
* Function Name : GPIO_Init
* Description : Initializes the GPIOx peripheral according to the specified
* parameters in the GPIO_InitStruct.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
* contains the configuration information for the specified GPIO
* peripheral.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
{
u32 currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
u32 tmpreg = 0x00, pinmask = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
/*---------------------------- GPIO Mode Configuration -----------------------*/
currentmode = ((u32)GPIO_InitStruct->GPIO_Mode) & ((u32)0x0F);
if ((((u32)GPIO_InitStruct->GPIO_Mode) & ((u32)0x10)) != 0x00)
{
/* Check the parameters */
assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
/* Output mode */
currentmode |= (u32)GPIO_InitStruct->GPIO_Speed;
}
/*---------------------------- GPIO CRL Configuration ------------------------*/
/* Configure the eight low port pins */
if (((u32)GPIO_InitStruct->GPIO_Pin & ((u32)0x00FF)) != 0x00)
{
tmpreg = GPIOx->CRL;
for (pinpos = 0x00; pinpos < 0x08; pinpos++)
{
pos = ((u32)0x01) << pinpos;
/* Get the port pins position */
currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
if (currentpin == pos)
{
pos = pinpos << 2;
/* Clear the corresponding low control register bits */
pinmask = ((u32)0x0F) << pos;
tmpreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tmpreg |= (currentmode << pos);
/* Reset the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
{
GPIOx->BRR = (((u32)0x01) << pinpos);
}
/* Set the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
{
GPIOx->BSRR = (((u32)0x01) << pinpos);
}
}
}
GPIOx->CRL = tmpreg;
}
/*---------------------------- GPIO CRH Configuration ------------------------*/
/* Configure the eight high port pins */
if (GPIO_InitStruct->GPIO_Pin > 0x00FF)
{
tmpreg = GPIOx->CRH;
for (pinpos = 0x00; pinpos < 0x08; pinpos++)
{
pos = (((u32)0x01) << (pinpos + 0x08));
/* Get the port pins position */
currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
if (currentpin == pos)
{
pos = pinpos << 2;
/* Clear the corresponding high control register bits */
pinmask = ((u32)0x0F) << pos;
tmpreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tmpreg |= (currentmode << pos);
/* Reset the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
{
GPIOx->BRR = (((u32)0x01) << (pinpos + 0x08));
}
/* Set the corresponding ODR bit */
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
{
GPIOx->BSRR = (((u32)0x01) << (pinpos + 0x08));
}
}
}
GPIOx->CRH = tmpreg;
}
}
/*******************************************************************************
* Function Name : GPIO_StructInit
* Description : Fills each GPIO_InitStruct member with its default value.
* Input : - GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure
* which will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)
{
/* Reset GPIO init structure parameters values */
GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING;
}
/*******************************************************************************
* Function Name : GPIO_ReadInputDataBit
* Description : Reads the specified input port pin.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* : - GPIO_Pin: specifies the port bit to read.
* This parameter can be GPIO_Pin_x where x can be (0..15).
* Output : None
* Return : The input port pin value.
*******************************************************************************/
u8 GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
u8 bitstatus = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
if ((GPIOx->IDR & GPIO_Pin) != (u32)Bit_RESET)
{
bitstatus = (u8)Bit_SET;
}
else
{
bitstatus = (u8)Bit_RESET;
}
return bitstatus;
}
/*******************************************************************************
* Function Name : GPIO_ReadInputData
* Description : Reads the specified GPIO input data port.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* Output : None
* Return : GPIO input data port value.
*******************************************************************************/
u16 GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
return ((u16)GPIOx->IDR);
}
/*******************************************************************************
* Function Name : GPIO_ReadOutputDataBit
* Description : Reads the specified output data port bit.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* : - GPIO_Pin: specifies the port bit to read.
* This parameter can be GPIO_Pin_x where x can be (0..15).
* Output : None
* Return : The output port pin value.
*******************************************************************************/
u8 GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
u8 bitstatus = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
if ((GPIOx->ODR & GPIO_Pin) != (u32)Bit_RESET)
{
bitstatus = (u8)Bit_SET;
}
else
{
bitstatus = (u8)Bit_RESET;
}
return bitstatus;
}
/*******************************************************************************
* Function Name : GPIO_ReadOutputData
* Description : Reads the specified GPIO output data port.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* Output : None
* Return : GPIO output data port value.
*******************************************************************************/
u16 GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
return ((u16)GPIOx->ODR);
}
/*******************************************************************************
* Function Name : GPIO_SetBits
* Description : Sets the selected data port bits.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* - GPIO_Pin: specifies the port bits to be written.
* This parameter can be any combination of GPIO_Pin_x where
* x can be (0..15).
* Output : None
* Return : None
*******************************************************************************/
void GPIO_SetBits(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_PIN(GPIO_Pin));
GPIOx->BSRR = GPIO_Pin;
}
/*******************************************************************************
* Function Name : GPIO_ResetBits
* Description : Clears the selected data port bits.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* - GPIO_Pin: specifies the port bits to be written.
* This parameter can be any combination of GPIO_Pin_x where
* x can be (0..15).
* Output : None
* Return : None
*******************************************************************************/
void GPIO_ResetBits(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_PIN(GPIO_Pin));
GPIOx->BRR = GPIO_Pin;
}
/*******************************************************************************
* Function Name : GPIO_WriteBit
* Description : Sets or clears the selected data port bit.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* - GPIO_Pin: specifies the port bit to be written.
* This parameter can be one of GPIO_Pin_x where x can be (0..15).
* - BitVal: specifies the value to be written to the selected bit.
* This parameter can be one of the BitAction enum values:
* - Bit_RESET: to clear the port pin
* - Bit_SET: to set the port pin
* Output : None
* Return : None
*******************************************************************************/
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin, BitAction BitVal)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
assert_param(IS_GPIO_BIT_ACTION(BitVal));
if (BitVal != Bit_RESET)
{
GPIOx->BSRR = GPIO_Pin;
}
else
{
GPIOx->BRR = GPIO_Pin;
}
}
/*******************************************************************************
* Function Name : GPIO_Write
* Description : Writes data to the specified GPIO data port.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* - PortVal: specifies the value to be written to the port output
* data register.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Write(GPIO_TypeDef* GPIOx, u16 PortVal)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
GPIOx->ODR = PortVal;
}
/*******************************************************************************
* Function Name : GPIO_PinLockConfig
* Description : Locks GPIO Pins configuration registers.
* Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
* - GPIO_Pin: specifies the port bit to be written.
* This parameter can be any combination of GPIO_Pin_x where
* x can be (0..15).
* Output : None
* Return : None
*******************************************************************************/
void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
u32 tmp = 0x00010000;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_PIN(GPIO_Pin));
tmp |= GPIO_Pin;
/* Set LCKK bit */
GPIOx->LCKR = tmp;
/* Reset LCKK bit */
GPIOx->LCKR = GPIO_Pin;
/* Set LCKK bit */
GPIOx->LCKR = tmp;
/* Read LCKK bit*/
tmp = GPIOx->LCKR;
/* Read LCKK bit*/
tmp = GPIOx->LCKR;
}
/*******************************************************************************
* Function Name : GPIO_EventOutputConfig
* Description : Selects the GPIO pin used as Event output.
* Input : - GPIO_PortSource: selects the GPIO port to be used as source
* for Event output.
* This parameter can be GPIO_PortSourceGPIOx where x can be
* (A..E).
* - GPIO_PinSource: specifies the pin for the Event output.
* This parameter can be GPIO_PinSourcex where x can be (0..15).
* Output : None
* Return : None
*******************************************************************************/
void GPIO_EventOutputConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
{
u32 tmpreg = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_EVENTOUT_PORT_SOURCE(GPIO_PortSource));
assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
tmpreg = AFIO->EVCR;
/* Clear the PORT[6:4] and PIN[3:0] bits */
tmpreg &= EVCR_PORTPINCONFIG_MASK;
tmpreg |= (u32)GPIO_PortSource << 0x04;
tmpreg |= GPIO_PinSource;
AFIO->EVCR = tmpreg;
}
/*******************************************************************************
* Function Name : GPIO_EventOutputCmd
* Description : Enables or disables the Event Output.
* Input : - NewState: new state of the Event output.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_EventOutputCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
*(vu32 *) EVCR_EVOE_BB = (u32)NewState;
}
/*******************************************************************************
* Function Name : GPIO_PinRemapConfig
* Description : Changes the mapping of the specified pin.
* Input : - GPIO_Remap: selects the pin to remap.
* This parameter can be one of the following values:
* - GPIO_Remap_SPI1
* - GPIO_Remap_I2C1
* - GPIO_Remap_USART1
* - GPIO_Remap_USART2
* - GPIO_PartialRemap_USART3
* - GPIO_FullRemap_USART3
* - GPIO_PartialRemap_TIM1
* - GPIO_FullRemap_TIM1
* - GPIO_PartialRemap1_TIM2
* - GPIO_PartialRemap2_TIM2
* - GPIO_FullRemap_TIM2
* - GPIO_PartialRemap_TIM3
* - GPIO_FullRemap_TIM3
* - GPIO_Remap_TIM4
* - GPIO_Remap1_CAN
* - GPIO_Remap2_CAN
* - GPIO_Remap_PD01
* - GPIO_Remap_TIM5CH4_LSI
* - GPIO_Remap_ADC1_ETRGINJ
* - GPIO_Remap_ADC1_ETRGREG
* - GPIO_Remap_ADC2_ETRGINJ
* - GPIO_Remap_ADC2_ETRGREG
* - GPIO_Remap_SWJ_NoJTRST
* - GPIO_Remap_SWJ_JTAGDisable
* - GPIO_Remap_SWJ_Disable
* - NewState: new state of the port pin remapping.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void GPIO_PinRemapConfig(u32 GPIO_Remap, FunctionalState NewState)
{
u32 tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_REMAP(GPIO_Remap));
assert_param(IS_FUNCTIONAL_STATE(NewState));
tmpreg = AFIO->MAPR;
tmpmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10;
tmp = GPIO_Remap & LSB_MASK;
if ((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK))
{
tmpreg &= DBGAFR_SWJCFG_MASK;
AFIO->MAPR &= DBGAFR_SWJCFG_MASK;
}
else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK)
{
tmp1 = ((u32)0x03) << tmpmask;
tmpreg &= ~tmp1;
tmpreg |= ~DBGAFR_SWJCFG_MASK;
}
else
{
tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15)*0x10));
tmpreg |= ~DBGAFR_SWJCFG_MASK;
}
if (NewState != DISABLE)
{
tmpreg |= (tmp << ((GPIO_Remap >> 0x15)*0x10));
}
AFIO->MAPR = tmpreg;
}
/*******************************************************************************
* Function Name : GPIO_EXTILineConfig
* Description : Selects the GPIO pin used as EXTI Line.
* Input : - GPIO_PortSource: selects the GPIO port to be used as
* source for EXTI lines.
* This parameter can be GPIO_PortSourceGPIOx where x can be
* (A..G).
* - GPIO_PinSource: specifies the EXTI line to be configured.
* This parameter can be GPIO_PinSourcex where x can be (0..15).
* Output : None
* Return : None
*******************************************************************************/
void GPIO_EXTILineConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
{
u32 tmp = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_EXTI_PORT_SOURCE(GPIO_PortSource));
assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
tmp = ((u32)0x0F) << (0x04 * (GPIO_PinSource & (u8)0x03));
AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp;
AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((u32)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (u8)0x03)));
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_lib.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all peripherals pointers initialization.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
#define EXT
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
#ifdef DEBUG
/*******************************************************************************
* Function Name : debug
* Description : This function initialize peripherals pointers.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void debug(void)
{
/************************************* ADC ************************************/
#ifdef _ADC1
ADC1 = (ADC_TypeDef *) ADC1_BASE;
#endif /*_ADC1 */
#ifdef _ADC2
ADC2 = (ADC_TypeDef *) ADC2_BASE;
#endif /*_ADC2 */
#ifdef _ADC3
ADC3 = (ADC_TypeDef *) ADC3_BASE;
#endif /*_ADC3 */
/************************************* BKP ************************************/
#ifdef _BKP
BKP = (BKP_TypeDef *) BKP_BASE;
#endif /*_BKP */
/************************************* CAN ************************************/
#ifdef _CAN
CAN = (CAN_TypeDef *) CAN_BASE;
#endif /*_CAN */
/************************************* CRC ************************************/
#ifdef _CRC
CRC = (CRC_TypeDef *) CRC_BASE;
#endif /*_CRC */
/************************************* DAC ************************************/
#ifdef _DAC
DAC = (DAC_TypeDef *) DAC_BASE;
#endif /*_DAC */
/************************************* DBGMCU**********************************/
#ifdef _DBGMCU
DBGMCU = (DBGMCU_TypeDef *) DBGMCU_BASE;
#endif /*_DBGMCU */
/************************************* DMA ************************************/
#ifdef _DMA
DMA1 = (DMA_TypeDef *) DMA1_BASE;
DMA2 = (DMA_TypeDef *) DMA2_BASE;
#endif /*_DMA */
#ifdef _DMA1_Channel1
DMA1_Channel1 = (DMA_Channel_TypeDef *) DMA1_Channel1_BASE;
#endif /*_DMA1_Channel1 */
#ifdef _DMA1_Channel2
DMA1_Channel2 = (DMA_Channel_TypeDef *) DMA1_Channel2_BASE;
#endif /*_DMA1_Channel2 */
#ifdef _DMA1_Channel3
DMA1_Channel3 = (DMA_Channel_TypeDef *) DMA1_Channel3_BASE;
#endif /*_DMA1_Channel3 */
#ifdef _DMA1_Channel4
DMA1_Channel4 = (DMA_Channel_TypeDef *) DMA1_Channel4_BASE;
#endif /*_DMA1_Channel4 */
#ifdef _DMA1_Channel5
DMA1_Channel5 = (DMA_Channel_TypeDef *) DMA1_Channel5_BASE;
#endif /*_DMA1_Channel5 */
#ifdef _DMA1_Channel6
DMA1_Channel6 = (DMA_Channel_TypeDef *) DMA1_Channel6_BASE;
#endif /*_DMA1_Channel6 */
#ifdef _DMA1_Channel7
DMA1_Channel7 = (DMA_Channel_TypeDef *) DMA1_Channel7_BASE;
#endif /*_DMA1_Channel7 */
#ifdef _DMA2_Channel1
DMA2_Channel1 = (DMA_Channel_TypeDef *) DMA2_Channel1_BASE;
#endif /*_DMA2_Channel1 */
#ifdef _DMA2_Channel2
DMA2_Channel2 = (DMA_Channel_TypeDef *) DMA2_Channel2_BASE;
#endif /*_DMA2_Channel2 */
#ifdef _DMA2_Channel3
DMA2_Channel3 = (DMA_Channel_TypeDef *) DMA2_Channel3_BASE;
#endif /*_DMA2_Channel3 */
#ifdef _DMA2_Channel4
DMA2_Channel4 = (DMA_Channel_TypeDef *) DMA2_Channel4_BASE;
#endif /*_DMA2_Channel4 */
#ifdef _DMA2_Channel5
DMA2_Channel5 = (DMA_Channel_TypeDef *) DMA2_Channel5_BASE;
#endif /*_DMA2_Channel5 */
/************************************* EXTI ***********************************/
#ifdef _EXTI
EXTI = (EXTI_TypeDef *) EXTI_BASE;
#endif /*_EXTI */
/************************************* FLASH and Option Bytes *****************/
#ifdef _FLASH
FLASH = (FLASH_TypeDef *) FLASH_R_BASE;
OB = (OB_TypeDef *) OB_BASE;
#endif /*_FLASH */
/************************************* FSMC ***********************************/
#ifdef _FSMC
FSMC_Bank1 = (FSMC_Bank1_TypeDef *) FSMC_Bank1_R_BASE;
FSMC_Bank1E = (FSMC_Bank1E_TypeDef *) FSMC_Bank1E_R_BASE;
FSMC_Bank2 = (FSMC_Bank2_TypeDef *) FSMC_Bank2_R_BASE;
FSMC_Bank3 = (FSMC_Bank3_TypeDef *) FSMC_Bank3_R_BASE;
FSMC_Bank4 = (FSMC_Bank4_TypeDef *) FSMC_Bank4_R_BASE;
#endif /*_FSMC */
/************************************* GPIO ***********************************/
#ifdef _GPIOA
GPIOA = (GPIO_TypeDef *) GPIOA_BASE;
#endif /*_GPIOA */
#ifdef _GPIOB
GPIOB = (GPIO_TypeDef *) GPIOB_BASE;
#endif /*_GPIOB */
#ifdef _GPIOC
GPIOC = (GPIO_TypeDef *) GPIOC_BASE;
#endif /*_GPIOC */
#ifdef _GPIOD
GPIOD = (GPIO_TypeDef *) GPIOD_BASE;
#endif /*_GPIOD */
#ifdef _GPIOE
GPIOE = (GPIO_TypeDef *) GPIOE_BASE;
#endif /*_GPIOE */
#ifdef _GPIOF
GPIOF = (GPIO_TypeDef *) GPIOF_BASE;
#endif /*_GPIOF */
#ifdef _GPIOG
GPIOG = (GPIO_TypeDef *) GPIOG_BASE;
#endif /*_GPIOG */
#ifdef _AFIO
AFIO = (AFIO_TypeDef *) AFIO_BASE;
#endif /*_AFIO */
/************************************* I2C ************************************/
#ifdef _I2C1
I2C1 = (I2C_TypeDef *) I2C1_BASE;
#endif /*_I2C1 */
#ifdef _I2C2
I2C2 = (I2C_TypeDef *) I2C2_BASE;
#endif /*_I2C2 */
/************************************* IWDG ***********************************/
#ifdef _IWDG
IWDG = (IWDG_TypeDef *) IWDG_BASE;
#endif /*_IWDG */
/************************************* NVIC ***********************************/
#ifdef _NVIC
NVIC = (NVIC_TypeDef *) NVIC_BASE;
SCB = (SCB_TypeDef *) SCB_BASE;
#endif /*_NVIC */
/************************************* PWR ************************************/
#ifdef _PWR
PWR = (PWR_TypeDef *) PWR_BASE;
#endif /*_PWR */
/************************************* RCC ************************************/
#ifdef _RCC
RCC = (RCC_TypeDef *) RCC_BASE;
#endif /*_RCC */
/************************************* RTC ************************************/
#ifdef _RTC
RTC = (RTC_TypeDef *) RTC_BASE;
#endif /*_RTC */
/************************************* SDIO ***********************************/
#ifdef _SDIO
SDIO = (SDIO_TypeDef *) SDIO_BASE;
#endif /*_SDIO */
/************************************* SPI ************************************/
#ifdef _SPI1
SPI1 = (SPI_TypeDef *) SPI1_BASE;
#endif /*_SPI1 */
#ifdef _SPI2
SPI2 = (SPI_TypeDef *) SPI2_BASE;
#endif /*_SPI2 */
#ifdef _SPI3
SPI3 = (SPI_TypeDef *) SPI3_BASE;
#endif /*_SPI3 */
/************************************* SysTick ********************************/
#ifdef _SysTick
SysTick = (SysTick_TypeDef *) SysTick_BASE;
#endif /*_SysTick */
/************************************* TIM ************************************/
#ifdef _TIM1
TIM1 = (TIM_TypeDef *) TIM1_BASE;
#endif /*_TIM1 */
#ifdef _TIM2
TIM2 = (TIM_TypeDef *) TIM2_BASE;
#endif /*_TIM2 */
#ifdef _TIM3
TIM3 = (TIM_TypeDef *) TIM3_BASE;
#endif /*_TIM3 */
#ifdef _TIM4
TIM4 = (TIM_TypeDef *) TIM4_BASE;
#endif /*_TIM4 */
#ifdef _TIM5
TIM5 = (TIM_TypeDef *) TIM5_BASE;
#endif /*_TIM5 */
#ifdef _TIM6
TIM6 = (TIM_TypeDef *) TIM6_BASE;
#endif /*_TIM6 */
#ifdef _TIM7
TIM7 = (TIM_TypeDef *) TIM7_BASE;
#endif /*_TIM7 */
#ifdef _TIM8
TIM8 = (TIM_TypeDef *) TIM8_BASE;
#endif /*_TIM8 */
/************************************* USART **********************************/
#ifdef _USART1
USART1 = (USART_TypeDef *) USART1_BASE;
#endif /*_USART1 */
#ifdef _USART2
USART2 = (USART_TypeDef *) USART2_BASE;
#endif /*_USART2 */
#ifdef _USART3
USART3 = (USART_TypeDef *) USART3_BASE;
#endif /*_USART3 */
#ifdef _UART4
UART4 = (USART_TypeDef *) UART4_BASE;
#endif /*_UART4 */
#ifdef _UART5
UART5 = (USART_TypeDef *) UART5_BASE;
#endif /*_UART5 */
/************************************* WWDG ***********************************/
#ifdef _WWDG
WWDG = (WWDG_TypeDef *) WWDG_BASE;
#endif /*_WWDG */
}
#endif /* DEBUG*/
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_nvic.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the NVIC firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_nvic.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define AIRCR_VECTKEY_MASK ((u32)0x05FA0000)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : NVIC_DeInit
* Description : Deinitializes the NVIC peripheral registers to their default
* reset values.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_DeInit(void)
{
u32 index = 0;
NVIC->ICER[0] = 0xFFFFFFFF;
NVIC->ICER[1] = 0x0FFFFFFF;
NVIC->ICPR[0] = 0xFFFFFFFF;
NVIC->ICPR[1] = 0x0FFFFFFF;
for(index = 0; index < 0x0F; index++)
{
NVIC->IPR[index] = 0x00000000;
}
}
/*******************************************************************************
* Function Name : NVIC_SCBDeInit
* Description : Deinitializes the SCB peripheral registers to their default
* reset values.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SCBDeInit(void)
{
u32 index = 0x00;
SCB->ICSR = 0x0A000000;
SCB->VTOR = 0x00000000;
SCB->AIRCR = AIRCR_VECTKEY_MASK;
SCB->SCR = 0x00000000;
SCB->CCR = 0x00000000;
for(index = 0; index < 0x03; index++)
{
SCB->SHPR[index] = 0;
}
SCB->SHCSR = 0x00000000;
SCB->CFSR = 0xFFFFFFFF;
SCB->HFSR = 0xFFFFFFFF;
SCB->DFSR = 0xFFFFFFFF;
}
/*******************************************************************************
* Function Name : NVIC_PriorityGroupConfig
* Description : Configures the priority grouping: pre-emption priority
* and subpriority.
* Input : - NVIC_PriorityGroup: specifies the priority grouping bits
* length. This parameter can be one of the following values:
* - NVIC_PriorityGroup_0: 0 bits for pre-emption priority
* 4 bits for subpriority
* - NVIC_PriorityGroup_1: 1 bits for pre-emption priority
* 3 bits for subpriority
* - NVIC_PriorityGroup_2: 2 bits for pre-emption priority
* 2 bits for subpriority
* - NVIC_PriorityGroup_3: 3 bits for pre-emption priority
* 1 bits for subpriority
* - NVIC_PriorityGroup_4: 4 bits for pre-emption priority
* 0 bits for subpriority
* Output : None
* Return : None
*******************************************************************************/
void NVIC_PriorityGroupConfig(u32 NVIC_PriorityGroup)
{
/* Check the parameters */
assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));
/* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */
SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
}
/*******************************************************************************
* Function Name : NVIC_Init
* Description : Initializes the NVIC peripheral according to the specified
* parameters in the NVIC_InitStruct.
* Input : - NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure
* that contains the configuration information for the
* specified NVIC peripheral.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
{
u32 tmppriority = 0x00, tmpreg = 0x00, tmpmask = 0x00;
u32 tmppre = 0, tmpsub = 0x0F;
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
assert_param(IS_NVIC_IRQ_CHANNEL(NVIC_InitStruct->NVIC_IRQChannel));
assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));
assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));
if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
{
/* Compute the Corresponding IRQ Priority --------------------------------*/
tmppriority = (0x700 - (SCB->AIRCR & (u32)0x700))>> 0x08;
tmppre = (0x4 - tmppriority);
tmpsub = tmpsub >> tmppriority;
tmppriority = (u32)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
tmppriority = tmppriority << 0x04;
tmppriority = ((u32)tmppriority) << ((NVIC_InitStruct->NVIC_IRQChannel & (u8)0x03) * 0x08);
tmpreg = NVIC->IPR[(NVIC_InitStruct->NVIC_IRQChannel >> 0x02)];
tmpmask = (u32)0xFF << ((NVIC_InitStruct->NVIC_IRQChannel & (u8)0x03) * 0x08);
tmpreg &= ~tmpmask;
tmppriority &= tmpmask;
tmpreg |= tmppriority;
NVIC->IPR[(NVIC_InitStruct->NVIC_IRQChannel >> 0x02)] = tmpreg;
/* Enable the Selected IRQ Channels --------------------------------------*/
NVIC->ISER[(NVIC_InitStruct->NVIC_IRQChannel >> 0x05)] =
(u32)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (u8)0x1F);
}
else
{
/* Disable the Selected IRQ Channels -------------------------------------*/
NVIC->ICER[(NVIC_InitStruct->NVIC_IRQChannel >> 0x05)] =
(u32)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (u8)0x1F);
}
}
/*******************************************************************************
* Function Name : NVIC_StructInit
* Description : Fills each NVIC_InitStruct member with its default value.
* Input : - NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure which
* will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_StructInit(NVIC_InitTypeDef* NVIC_InitStruct)
{
/* NVIC_InitStruct members default value */
NVIC_InitStruct->NVIC_IRQChannel = 0x00;
NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStruct->NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStruct->NVIC_IRQChannelCmd = DISABLE;
}
/*******************************************************************************
* Function Name : NVIC_SETPRIMASK
* Description : Enables the PRIMASK priority: Raises the execution priority to 0.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SETPRIMASK(void)
{
__SETPRIMASK();
}
/*******************************************************************************
* Function Name : NVIC_RESETPRIMASK
* Description : Disables the PRIMASK priority.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_RESETPRIMASK(void)
{
__RESETPRIMASK();
}
/*******************************************************************************
* Function Name : NVIC_SETFAULTMASK
* Description : Enables the FAULTMASK priority: Raises the execution priority to -1.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SETFAULTMASK(void)
{
__SETFAULTMASK();
}
/*******************************************************************************
* Function Name : NVIC_RESETFAULTMASK
* Description : Disables the FAULTMASK priority.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_RESETFAULTMASK(void)
{
__RESETFAULTMASK();
}
/*******************************************************************************
* Function Name : NVIC_BASEPRICONFIG
* Description : The execution priority can be changed from 15 (lowest
configurable priority) to 1. Writing a zero value will disable
* the mask of execution priority.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_BASEPRICONFIG(u32 NewPriority)
{
/* Check the parameters */
assert_param(IS_NVIC_BASE_PRI(NewPriority));
__BASEPRICONFIG(NewPriority << 0x04);
}
/*******************************************************************************
* Function Name : NVIC_GetBASEPRI
* Description : Returns the BASEPRI mask value.
* Input : None
* Output : None
* Return : BASEPRI register value
*******************************************************************************/
u32 NVIC_GetBASEPRI(void)
{
return (__GetBASEPRI());
}
/*******************************************************************************
* Function Name : NVIC_GetCurrentPendingIRQChannel
* Description : Returns the current pending IRQ channel identifier.
* Input : None
* Output : None
* Return : Pending IRQ Channel Identifier.
*******************************************************************************/
u16 NVIC_GetCurrentPendingIRQChannel(void)
{
return ((u16)((SCB->ICSR & (u32)0x003FF000) >> 0x0C));
}
/*******************************************************************************
* Function Name : NVIC_GetIRQChannelPendingBitStatus
* Description : Checks whether the specified IRQ Channel pending bit is set
* or not.
* Input : - NVIC_IRQChannel: specifies the interrupt pending bit to check.
* Output : None
* Return : The new state of IRQ Channel pending bit(SET or RESET).
*******************************************************************************/
ITStatus NVIC_GetIRQChannelPendingBitStatus(u8 NVIC_IRQChannel)
{
ITStatus pendingirqstatus = RESET;
u32 tmp = 0x00;
/* Check the parameters */
assert_param(IS_NVIC_IRQ_CHANNEL(NVIC_IRQChannel));
tmp = ((u32)0x01 << (NVIC_IRQChannel & (u32)0x1F));
if (((NVIC->ISPR[(NVIC_IRQChannel >> 0x05)]) & tmp) == tmp)
{
pendingirqstatus = SET;
}
else
{
pendingirqstatus = RESET;
}
return pendingirqstatus;
}
/*******************************************************************************
* Function Name : NVIC_SetIRQChannelPendingBit
* Description : Sets the NVIC’s interrupt pending bit.
* Input : - NVIC_IRQChannel: specifies the interrupt pending bit to Set.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SetIRQChannelPendingBit(u8 NVIC_IRQChannel)
{
/* Check the parameters */
assert_param(IS_NVIC_IRQ_CHANNEL(NVIC_IRQChannel));
*(vu32*) 0xE000EF00 = (u32)NVIC_IRQChannel;
}
/*******************************************************************************
* Function Name : NVIC_ClearIRQChannelPendingBit
* Description : Clears the NVIC’s interrupt pending bit.
* Input : - NVIC_IRQChannel: specifies the interrupt pending bit to clear.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_ClearIRQChannelPendingBit(u8 NVIC_IRQChannel)
{
/* Check the parameters */
assert_param(IS_NVIC_IRQ_CHANNEL(NVIC_IRQChannel));
NVIC->ICPR[(NVIC_IRQChannel >> 0x05)] = (u32)0x01 << (NVIC_IRQChannel & (u32)0x1F);
}
/*******************************************************************************
* Function Name : NVIC_GetCurrentActiveHandler
* Description : Returns the current active Handler (IRQ Channel and
* SystemHandler) identifier.
* Input : None
* Output : None
* Return : Active Handler Identifier.
*******************************************************************************/
u16 NVIC_GetCurrentActiveHandler(void)
{
return ((u16)(SCB->ICSR & (u32)0x3FF));
}
/*******************************************************************************
* Function Name : NVIC_GetIRQChannelActiveBitStatus
* Description : Checks whether the specified IRQ Channel active bit is set
* or not.
* Input : - NVIC_IRQChannel: specifies the interrupt active bit to check.
* Output : None
* Return : The new state of IRQ Channel active bit(SET or RESET).
*******************************************************************************/
ITStatus NVIC_GetIRQChannelActiveBitStatus(u8 NVIC_IRQChannel)
{
ITStatus activeirqstatus = RESET;
u32 tmp = 0x00;
/* Check the parameters */
assert_param(IS_NVIC_IRQ_CHANNEL(NVIC_IRQChannel));
tmp = ((u32)0x01 << (NVIC_IRQChannel & (u32)0x1F));
if (((NVIC->IABR[(NVIC_IRQChannel >> 0x05)]) & tmp) == tmp )
{
activeirqstatus = SET;
}
else
{
activeirqstatus = RESET;
}
return activeirqstatus;
}
/*******************************************************************************
* Function Name : NVIC_GetCPUID
* Description : Returns the ID number, the version number and the implementation
* details of the Cortex-M3 core.
* Input : None
* Output : None
* Return : CPU ID.
*******************************************************************************/
u32 NVIC_GetCPUID(void)
{
return (SCB->CPUID);
}
/*******************************************************************************
* Function Name : NVIC_SetVectorTable
* Description : Sets the vector table location and Offset.
* Input : - NVIC_VectTab: specifies if the vector table is in RAM or
* FLASH memory.
* This parameter can be one of the following values:
* - NVIC_VectTab_RAM
* - NVIC_VectTab_FLASH
* - Offset: Vector Table base offset field.
* This value must be a multiple of 0x100.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SetVectorTable(u32 NVIC_VectTab, u32 Offset)
{
/* Check the parameters */
assert_param(IS_NVIC_VECTTAB(NVIC_VectTab));
assert_param(IS_NVIC_OFFSET(Offset));
SCB->VTOR = NVIC_VectTab | (Offset & (u32)0x1FFFFF80);
}
/*******************************************************************************
* Function Name : NVIC_GenerateSystemReset
* Description : Generates a system reset.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_GenerateSystemReset(void)
{
SCB->AIRCR = AIRCR_VECTKEY_MASK | (u32)0x04;
}
/*******************************************************************************
* Function Name : NVIC_GenerateCoreReset
* Description : Generates a Core (Core + NVIC) reset.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_GenerateCoreReset(void)
{
SCB->AIRCR = AIRCR_VECTKEY_MASK | (u32)0x01;
}
/*******************************************************************************
* Function Name : NVIC_SystemLPConfig
* Description : Selects the condition for the system to enter low power mode.
* Input : - LowPowerMode: Specifies the new mode for the system to enter
* low power mode.
* This parameter can be one of the following values:
* - NVIC_LP_SEVONPEND
* - NVIC_LP_SLEEPDEEP
* - NVIC_LP_SLEEPONEXIT
* - NewState: new state of LP condition.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SystemLPConfig(u8 LowPowerMode, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_NVIC_LP(LowPowerMode));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
SCB->SCR |= LowPowerMode;
}
else
{
SCB->SCR &= (u32)(~(u32)LowPowerMode);
}
}
/*******************************************************************************
* Function Name : NVIC_SystemHandlerConfig
* Description : Enables or disables the specified System Handlers.
* Input : - SystemHandler: specifies the system handler to be enabled
* or disabled.
* This parameter can be one of the following values:
* - SystemHandler_MemoryManage
* - SystemHandler_BusFault
* - SystemHandler_UsageFault
* - NewState: new state of specified System Handlers.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SystemHandlerConfig(u32 SystemHandler, FunctionalState NewState)
{
u32 tmpreg = 0x00;
/* Check the parameters */
assert_param(IS_CONFIG_SYSTEM_HANDLER(SystemHandler));
assert_param(IS_FUNCTIONAL_STATE(NewState));
tmpreg = (u32)0x01 << (SystemHandler & (u32)0x1F);
if (NewState != DISABLE)
{
SCB->SHCSR |= tmpreg;
}
else
{
SCB->SHCSR &= ~tmpreg;
}
}
/*******************************************************************************
* Function Name : NVIC_SystemHandlerPriorityConfig
* Description : Configures the specified System Handlers priority.
* Input : - SystemHandler: specifies the system handler to be
* enabled or disabled.
* This parameter can be one of the following values:
* - SystemHandler_MemoryManage
* - SystemHandler_BusFault
* - SystemHandler_UsageFault
* - SystemHandler_SVCall
* - SystemHandler_DebugMonitor
* - SystemHandler_PSV
* - SystemHandler_SysTick
* - SystemHandlerPreemptionPriority: new priority group of the
* specified system handlers.
* - SystemHandlerSubPriority: new sub priority of the specified
* system handlers.
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SystemHandlerPriorityConfig(u32 SystemHandler, u8 SystemHandlerPreemptionPriority,
u8 SystemHandlerSubPriority)
{
u32 tmp1 = 0x00, tmp2 = 0xFF, handlermask = 0x00;
u32 tmppriority = 0x00;
/* Check the parameters */
assert_param(IS_PRIORITY_SYSTEM_HANDLER(SystemHandler));
assert_param(IS_NVIC_PREEMPTION_PRIORITY(SystemHandlerPreemptionPriority));
assert_param(IS_NVIC_SUB_PRIORITY(SystemHandlerSubPriority));
tmppriority = (0x700 - (SCB->AIRCR & (u32)0x700))>> 0x08;
tmp1 = (0x4 - tmppriority);
tmp2 = tmp2 >> tmppriority;
tmppriority = (u32)SystemHandlerPreemptionPriority << tmp1;
tmppriority |= SystemHandlerSubPriority & tmp2;
tmppriority = tmppriority << 0x04;
tmp1 = SystemHandler & (u32)0xC0;
tmp1 = tmp1 >> 0x06;
tmp2 = (SystemHandler >> 0x08) & (u32)0x03;
tmppriority = tmppriority << (tmp2 * 0x08);
handlermask = (u32)0xFF << (tmp2 * 0x08);
SCB->SHPR[tmp1] &= ~handlermask;
SCB->SHPR[tmp1] |= tmppriority;
}
/*******************************************************************************
* Function Name : NVIC_GetSystemHandlerPendingBitStatus
* Description : Checks whether the specified System handlers pending bit is
* set or not.
* Input : - SystemHandler: specifies the system handler pending bit to
* check.
* This parameter can be one of the following values:
* - SystemHandler_MemoryManage
* - SystemHandler_BusFault
* - SystemHandler_SVCall
* Output : None
* Return : The new state of System Handler pending bit(SET or RESET).
*******************************************************************************/
ITStatus NVIC_GetSystemHandlerPendingBitStatus(u32 SystemHandler)
{
ITStatus bitstatus = RESET;
u32 tmp = 0x00, tmppos = 0x00;
/* Check the parameters */
assert_param(IS_GET_PENDING_SYSTEM_HANDLER(SystemHandler));
tmppos = (SystemHandler >> 0x0A);
tmppos &= (u32)0x0F;
tmppos = (u32)0x01 << tmppos;
tmp = SCB->SHCSR & tmppos;
if (tmp == tmppos)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/*******************************************************************************
* Function Name : NVIC_SetSystemHandlerPendingBit
* Description : Sets System Handler pending bit.
* Input : - SystemHandler: specifies the system handler pending bit
* to be set.
* This parameter can be one of the following values:
* - SystemHandler_NMI
* - SystemHandler_PSV
* - SystemHandler_SysTick
* Output : None
* Return : None
*******************************************************************************/
void NVIC_SetSystemHandlerPendingBit(u32 SystemHandler)
{
u32 tmp = 0x00;
/* Check the parameters */
assert_param(IS_SET_PENDING_SYSTEM_HANDLER(SystemHandler));
/* Get the System Handler pending bit position */
tmp = SystemHandler & (u32)0x1F;
/* Set the corresponding System Handler pending bit */
SCB->ICSR |= ((u32)0x01 << tmp);
}
/*******************************************************************************
* Function Name : NVIC_ClearSystemHandlerPendingBit
* Description : Clears System Handler pending bit.
* Input : - SystemHandler: specifies the system handler pending bit to
* be clear.
* This parameter can be one of the following values:
* - SystemHandler_PSV
* - SystemHandler_SysTick
* Output : None
* Return : None
*******************************************************************************/
void NVIC_ClearSystemHandlerPendingBit(u32 SystemHandler)
{
u32 tmp = 0x00;
/* Check the parameters */
assert_param(IS_CLEAR_SYSTEM_HANDLER(SystemHandler));
/* Get the System Handler pending bit position */
tmp = SystemHandler & (u32)0x1F;
/* Clear the corresponding System Handler pending bit */
SCB->ICSR |= ((u32)0x01 << (tmp - 0x01));
}
/*******************************************************************************
* Function Name : NVIC_GetSystemHandlerActiveBitStatus
* Description : Checks whether the specified System handlers active bit is
* set or not.
* Input : - SystemHandler: specifies the system handler active bit to
* check.
* This parameter can be one of the following values:
* - SystemHandler_MemoryManage
* - SystemHandler_BusFault
* - SystemHandler_UsageFault
* - SystemHandler_SVCall
* - SystemHandler_DebugMonitor
* - SystemHandler_PSV
* - SystemHandler_SysTick
* Output : None
* Return : The new state of System Handler active bit(SET or RESET).
*******************************************************************************/
ITStatus NVIC_GetSystemHandlerActiveBitStatus(u32 SystemHandler)
{
ITStatus bitstatus = RESET;
u32 tmp = 0x00, tmppos = 0x00;
/* Check the parameters */
assert_param(IS_GET_ACTIVE_SYSTEM_HANDLER(SystemHandler));
tmppos = (SystemHandler >> 0x0E) & (u32)0x0F;
tmppos = (u32)0x01 << tmppos;
tmp = SCB->SHCSR & tmppos;
if (tmp == tmppos)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/*******************************************************************************
* Function Name : NVIC_GetFaultHandlerSources
* Description : Returns the system fault handlers sources.
* Input : - SystemHandler: specifies the system handler to get its fault
* sources.
* This parameter can be one of the following values:
* - SystemHandler_HardFault
* - SystemHandler_MemoryManage
* - SystemHandler_BusFault
* - SystemHandler_UsageFault
* - SystemHandler_DebugMonitor
* Output : None
* Return : Source of the fault handler.
*******************************************************************************/
u32 NVIC_GetFaultHandlerSources(u32 SystemHandler)
{
u32 faultsources = 0x00;
u32 tmpreg = 0x00, tmppos = 0x00;
/* Check the parameters */
assert_param(IS_FAULT_SOURCE_SYSTEM_HANDLER(SystemHandler));
tmpreg = (SystemHandler >> 0x12) & (u32)0x03;
tmppos = (SystemHandler >> 0x14) & (u32)0x03;
if (tmpreg == 0x00)
{
faultsources = SCB->HFSR;
}
else if (tmpreg == 0x01)
{
faultsources = SCB->CFSR >> (tmppos * 0x08);
if (tmppos != 0x02)
{
faultsources &= (u32)0x0F;
}
else
{
faultsources &= (u32)0xFF;
}
}
else
{
faultsources = SCB->DFSR;
}
return faultsources;
}
/*******************************************************************************
* Function Name : NVIC_GetFaultAddress
* Description : Returns the address of the location that generated a fault
* handler.
* Input : - SystemHandler: specifies the system handler to get its
* fault address.
* This parameter can be one of the following values:
* - SystemHandler_MemoryManage
* - SystemHandler_BusFault
* Output : None
* Return : Fault address.
*******************************************************************************/
u32 NVIC_GetFaultAddress(u32 SystemHandler)
{
u32 faultaddress = 0x00;
u32 tmp = 0x00;
/* Check the parameters */
assert_param(IS_FAULT_ADDRESS_SYSTEM_HANDLER(SystemHandler));
tmp = (SystemHandler >> 0x16) & (u32)0x01;
if (tmp == 0x00)
{
faultaddress = SCB->MMFAR;
}
else
{
faultaddress = SCB->BFAR;
}
return faultaddress;
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_spi.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the SPI firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_spi.h"
#include "stm32f10x_rcc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* SPI SPE mask */
#define CR1_SPE_Set ((u16)0x0040)
#define CR1_SPE_Reset ((u16)0xFFBF)
/* I2S I2SE mask */
#define I2SCFGR_I2SE_Set ((u16)0x0400)
#define I2SCFGR_I2SE_Reset ((u16)0xFBFF)
/* SPI CRCNext mask */
#define CR1_CRCNext_Set ((u16)0x1000)
/* SPI CRCEN mask */
#define CR1_CRCEN_Set ((u16)0x2000)
#define CR1_CRCEN_Reset ((u16)0xDFFF)
/* SPI SSOE mask */
#define CR2_SSOE_Set ((u16)0x0004)
#define CR2_SSOE_Reset ((u16)0xFFFB)
/* SPI registers Masks */
#define CR1_CLEAR_Mask ((u16)0x3040)
#define I2SCFGR_CLEAR_Mask ((u16)0xF040)
/* SPI or I2S mode selection masks */
#define SPI_Mode_Select ((u16)0xF7FF)
#define I2S_Mode_Select ((u16)0x0800)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : SPI_I2S_DeInit
* Description : Deinitializes the SPIx peripheral registers to their default
* reset values (Affects also the I2Ss).
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* Output : None
* Return : None
*******************************************************************************/
void SPI_I2S_DeInit(SPI_TypeDef* SPIx)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
switch (*(u32*)&SPIx)
{
case SPI1_BASE:
/* Enable SPI1 reset state */
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
/* Release SPI1 from reset state */
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
break;
case SPI2_BASE:
/* Enable SPI2 reset state */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
/* Release SPI2 from reset state */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
break;
case SPI3_BASE:
/* Enable SPI3 reset state */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE);
/* Release SPI3 from reset state */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, DISABLE);
break;
default:
break;
}
}
/*******************************************************************************
* Function Name : SPI_Init
* Description : Initializes the SPIx peripheral according to the specified
* parameters in the SPI_InitStruct.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - SPI_InitStruct: pointer to a SPI_InitTypeDef structure that
* contains the configuration information for the specified
* SPI peripheral.
* Output : None
* Return : None
******************************************************************************/
void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct)
{
u16 tmpreg = 0;
/* check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
/* Check the SPI parameters */
assert_param(IS_SPI_DIRECTION_MODE(SPI_InitStruct->SPI_Direction));
assert_param(IS_SPI_MODE(SPI_InitStruct->SPI_Mode));
assert_param(IS_SPI_DATASIZE(SPI_InitStruct->SPI_DataSize));
assert_param(IS_SPI_CPOL(SPI_InitStruct->SPI_CPOL));
assert_param(IS_SPI_CPHA(SPI_InitStruct->SPI_CPHA));
assert_param(IS_SPI_NSS(SPI_InitStruct->SPI_NSS));
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_InitStruct->SPI_BaudRatePrescaler));
assert_param(IS_SPI_FIRST_BIT(SPI_InitStruct->SPI_FirstBit));
assert_param(IS_SPI_CRC_POLYNOMIAL(SPI_InitStruct->SPI_CRCPolynomial));
/*---------------------------- SPIx CR1 Configuration ------------------------*/
/* Get the SPIx CR1 value */
tmpreg = SPIx->CR1;
/* Clear BIDIMode, BIDIOE, RxONLY, SSM, SSI, LSBFirst, BR, MSTR, CPOL and CPHA bits */
tmpreg &= CR1_CLEAR_Mask;
/* Configure SPIx: direction, NSS management, first transmitted bit, BaudRate prescaler
master/salve mode, CPOL and CPHA */
/* Set BIDImode, BIDIOE and RxONLY bits according to SPI_Direction value */
/* Set SSM, SSI and MSTR bits according to SPI_Mode and SPI_NSS values */
/* Set LSBFirst bit according to SPI_FirstBit value */
/* Set BR bits according to SPI_BaudRatePrescaler value */
/* Set CPOL bit according to SPI_CPOL value */
/* Set CPHA bit according to SPI_CPHA value */
tmpreg |= (u16)((u32)SPI_InitStruct->SPI_Direction | SPI_InitStruct->SPI_Mode |
SPI_InitStruct->SPI_DataSize | SPI_InitStruct->SPI_CPOL |
SPI_InitStruct->SPI_CPHA | SPI_InitStruct->SPI_NSS |
SPI_InitStruct->SPI_BaudRatePrescaler | SPI_InitStruct->SPI_FirstBit);
/* Write to SPIx CR1 */
SPIx->CR1 = tmpreg;
/* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */
SPIx->I2SCFGR &= SPI_Mode_Select;
/*---------------------------- SPIx CRCPOLY Configuration --------------------*/
/* Write to SPIx CRCPOLY */
SPIx->CRCPR = SPI_InitStruct->SPI_CRCPolynomial;
}
/*******************************************************************************
* Function Name : I2S_Init
* Description : Initializes the SPIx peripheral according to the specified
* parameters in the I2S_InitStruct.
* Input : - SPIx: where x can be 2 or 3 to select the SPI peripheral
* (configured in I2S mode).
* - I2S_InitStruct: pointer to an I2S_InitTypeDef structure that
* contains the configuration information for the specified
* SPI peripheral configured in I2S mode.
* Output : None
* Return : None
******************************************************************************/
void I2S_Init(SPI_TypeDef* SPIx, I2S_InitTypeDef* I2S_InitStruct)
{
u16 tmpreg = 0, i2sdiv = 2, i2sodd = 0, packetlength = 1;
u32 tmp = 0;
RCC_ClocksTypeDef RCC_Clocks;
/* Check the I2S parameters */
assert_param(IS_SPI_23_PERIPH(SPIx));
assert_param(IS_I2S_MODE(I2S_InitStruct->I2S_Mode));
assert_param(IS_I2S_STANDARD(I2S_InitStruct->I2S_Standard));
assert_param(IS_I2S_DATA_FORMAT(I2S_InitStruct->I2S_DataFormat));
assert_param(IS_I2S_MCLK_OUTPUT(I2S_InitStruct->I2S_MCLKOutput));
assert_param(IS_I2S_AUDIO_FREQ(I2S_InitStruct->I2S_AudioFreq));
assert_param(IS_I2S_CPOL(I2S_InitStruct->I2S_CPOL));
/*----------------------- SPIx I2SCFGR & I2SPR Configuration -----------------*/
/* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */
SPIx->I2SCFGR &= I2SCFGR_CLEAR_Mask;
SPIx->I2SPR = 0x0002;
/* Get the I2SCFGR register value */
tmpreg = SPIx->I2SCFGR;
/* If the default value has to be written, reinitialize i2sdiv and i2sodd*/
if(I2S_InitStruct->I2S_AudioFreq == I2S_AudioFreq_Default)
{
i2sodd = (u16)0;
i2sdiv = (u16)2;
}
/* If the requested audio frequency is not the default, compute the prescaler */
else
{
/* Check the frame length (For the Prescaler computing) */
if(I2S_InitStruct->I2S_DataFormat == I2S_DataFormat_16b)
{
/* Packet length is 16 bits */
packetlength = 1;
}
else
{
/* Packet length is 32 bits */
packetlength = 2;
}
/* Get System Clock frequency */
RCC_GetClocksFreq(&RCC_Clocks);
/* Compute the Real divider depending on the MCLK output state with a flaoting point */
if(I2S_InitStruct->I2S_MCLKOutput == I2S_MCLKOutput_Enable)
{
/* MCLK output is enabled */
tmp = (u16)(((10 * RCC_Clocks.SYSCLK_Frequency) / (256 * I2S_InitStruct->I2S_AudioFreq)) + 5);
}
else
{
/* MCLK output is disabled */
tmp = (u16)(((10 * RCC_Clocks.SYSCLK_Frequency) / (32 * packetlength * I2S_InitStruct->I2S_AudioFreq)) + 5);
}
/* Remove the flaoting point */
tmp = tmp/10;
/* Check the parity of the divider */
i2sodd = (u16)(tmp & (u16)0x0001);
/* Compute the i2sdiv prescaler */
i2sdiv = (u16)((tmp - i2sodd) / 2);
/* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */
i2sodd = (u16) (i2sodd << 8);
}
/* Test if the divider is 1 or 0 */
if ((i2sdiv < 2) || (i2sdiv > 0xFF))
{
/* Set the default values */
i2sdiv = 2;
i2sodd = 0;
}
/* Write to SPIx I2SPR register the computed value */
SPIx->I2SPR = (u16)(i2sdiv | i2sodd | I2S_InitStruct->I2S_MCLKOutput);
/* Configure the I2S with the SPI_InitStruct values */
tmpreg |= (u16)(I2S_Mode_Select | I2S_InitStruct->I2S_Mode | \
I2S_InitStruct->I2S_Standard | I2S_InitStruct->I2S_DataFormat | \
I2S_InitStruct->I2S_CPOL);
/* Write to SPIx I2SCFGR */
SPIx->I2SCFGR = tmpreg;
}
/*******************************************************************************
* Function Name : SPI_StructInit
* Description : Fills each SPI_InitStruct member with its default value.
* Input : - SPI_InitStruct : pointer to a SPI_InitTypeDef structure
* which will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void SPI_StructInit(SPI_InitTypeDef* SPI_InitStruct)
{
/*--------------- Reset SPI init structure parameters values -----------------*/
/* Initialize the SPI_Direction member */
SPI_InitStruct->SPI_Direction = SPI_Direction_2Lines_FullDuplex;
/* initialize the SPI_Mode member */
SPI_InitStruct->SPI_Mode = SPI_Mode_Slave;
/* initialize the SPI_DataSize member */
SPI_InitStruct->SPI_DataSize = SPI_DataSize_8b;
/* Initialize the SPI_CPOL member */
SPI_InitStruct->SPI_CPOL = SPI_CPOL_Low;
/* Initialize the SPI_CPHA member */
SPI_InitStruct->SPI_CPHA = SPI_CPHA_1Edge;
/* Initialize the SPI_NSS member */
SPI_InitStruct->SPI_NSS = SPI_NSS_Hard;
/* Initialize the SPI_BaudRatePrescaler member */
SPI_InitStruct->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
/* Initialize the SPI_FirstBit member */
SPI_InitStruct->SPI_FirstBit = SPI_FirstBit_MSB;
/* Initialize the SPI_CRCPolynomial member */
SPI_InitStruct->SPI_CRCPolynomial = 7;
}
/*******************************************************************************
* Function Name : I2S_StructInit
* Description : Fills each I2S_InitStruct member with its default value.
* Input : - I2S_InitStruct : pointer to a I2S_InitTypeDef structure
* which will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void I2S_StructInit(I2S_InitTypeDef* I2S_InitStruct)
{
/*--------------- Reset I2S init structure parameters values -----------------*/
/* Initialize the I2S_Mode member */
I2S_InitStruct->I2S_Mode = I2S_Mode_SlaveTx;
/* Initialize the I2S_Standard member */
I2S_InitStruct->I2S_Standard = I2S_Standard_Phillips;
/* Initialize the I2S_DataFormat member */
I2S_InitStruct->I2S_DataFormat = I2S_DataFormat_16b;
/* Initialize the I2S_MCLKOutput member */
I2S_InitStruct->I2S_MCLKOutput = I2S_MCLKOutput_Disable;
/* Initialize the I2S_AudioFreq member */
I2S_InitStruct->I2S_AudioFreq = I2S_AudioFreq_Default;
/* Initialize the I2S_CPOL member */
I2S_InitStruct->I2S_CPOL = I2S_CPOL_Low;
}
/*******************************************************************************
* Function Name : SPI_Cmd
* Description : Enables or disables the specified SPI peripheral.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - NewState: new state of the SPIx peripheral.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void SPI_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected SPI peripheral */
SPIx->CR1 |= CR1_SPE_Set;
}
else
{
/* Disable the selected SPI peripheral */
SPIx->CR1 &= CR1_SPE_Reset;
}
}
/*******************************************************************************
* Function Name : I2S_Cmd
* Description : Enables or disables the specified SPI peripheral (in I2S mode).
* Input : - SPIx: where x can be 2 or 3 to select the SPI peripheral.
* - NewState: new state of the SPIx peripheral.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void I2S_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_SPI_23_PERIPH(SPIx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected SPI peripheral (in I2S mode) */
SPIx->I2SCFGR |= I2SCFGR_I2SE_Set;
}
else
{
/* Disable the selected SPI peripheral (in I2S mode) */
SPIx->I2SCFGR &= I2SCFGR_I2SE_Reset;
}
}
/*******************************************************************************
* Function Name : SPI_I2S_ITConfig
* Description : Enables or disables the specified SPI/I2S interrupts.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - SPI_I2S_IT: specifies the SPI/I2S interrupt source to be
* enabled or disabled.
* This parameter can be one of the following values:
* - SPI_I2S_IT_TXE: Tx buffer empty interrupt mask
* - SPI_I2S_IT_RXNE: Rx buffer not empty interrupt mask
* - SPI_I2S_IT_ERR: Error interrupt mask
* - NewState: new state of the specified SPI/I2S interrupt.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, u8 SPI_I2S_IT, FunctionalState NewState)
{
u16 itpos = 0, itmask = 0 ;
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
assert_param(IS_SPI_I2S_CONFIG_IT(SPI_I2S_IT));
/* Get the SPI/I2S IT index */
itpos = SPI_I2S_IT >> 4;
/* Set the IT mask */
itmask = (u16)((u16)1 << itpos);
if (NewState != DISABLE)
{
/* Enable the selected SPI/I2S interrupt */
SPIx->CR2 |= itmask;
}
else
{
/* Disable the selected SPI/I2S interrupt */
SPIx->CR2 &= (u16)~itmask;
}
}
/*******************************************************************************
* Function Name : SPI_I2S_DMACmd
* Description : Enables or disables the SPIx/I2Sx DMA interface.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - SPI_I2S_DMAReq: specifies the SPI/I2S DMA transfer request
* to be enabled or disabled.
* This parameter can be any combination of the following values:
* - SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request
* - SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request
* - NewState: new state of the selected SPI/I2S DMA transfer
* request.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, u16 SPI_I2S_DMAReq, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
assert_param(IS_SPI_I2S_DMAREQ(SPI_I2S_DMAReq));
if (NewState != DISABLE)
{
/* Enable the selected SPI/I2S DMA requests */
SPIx->CR2 |= SPI_I2S_DMAReq;
}
else
{
/* Disable the selected SPI/I2S DMA requests */
SPIx->CR2 &= (u16)~SPI_I2S_DMAReq;
}
}
/*******************************************************************************
* Function Name : SPI_I2S_SendData
* Description : Transmits a Data through the SPIx/I2Sx peripheral.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - Data : Data to be transmitted..
* Output : None
* Return : None
*******************************************************************************/
void SPI_I2S_SendData(SPI_TypeDef* SPIx, u16 Data)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
/* Write in the DR register the data to be sent */
SPIx->DR = Data;
}
/*******************************************************************************
* Function Name : SPI_I2S_ReceiveData
* Description : Returns the most recent received data by the SPIx/I2Sx peripheral.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* Output : None
* Return : The value of the received data.
*******************************************************************************/
u16 SPI_I2S_ReceiveData(SPI_TypeDef* SPIx)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
/* Return the data in the DR register */
return SPIx->DR;
}
/*******************************************************************************
* Function Name : SPI_NSSInternalSoftwareConfig
* Description : Configures internally by software the NSS pin for the selected
* SPI.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - SPI_NSSInternalSoft: specifies the SPI NSS internal state.
* This parameter can be one of the following values:
* - SPI_NSSInternalSoft_Set: Set NSS pin internally
* - SPI_NSSInternalSoft_Reset: Reset NSS pin internally
* Output : None
* Return : None
*******************************************************************************/
void SPI_NSSInternalSoftwareConfig(SPI_TypeDef* SPIx, u16 SPI_NSSInternalSoft)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_NSS_INTERNAL(SPI_NSSInternalSoft));
if (SPI_NSSInternalSoft != SPI_NSSInternalSoft_Reset)
{
/* Set NSS pin internally by software */
SPIx->CR1 |= SPI_NSSInternalSoft_Set;
}
else
{
/* Reset NSS pin internally by software */
SPIx->CR1 &= SPI_NSSInternalSoft_Reset;
}
}
/*******************************************************************************
* Function Name : SPI_SSOutputCmd
* Description : Enables or disables the SS output for the selected SPI.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - NewState: new state of the SPIx SS output.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void SPI_SSOutputCmd(SPI_TypeDef* SPIx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected SPI SS output */
SPIx->CR2 |= CR2_SSOE_Set;
}
else
{
/* Disable the selected SPI SS output */
SPIx->CR2 &= CR2_SSOE_Reset;
}
}
/*******************************************************************************
* Function Name : SPI_DataSizeConfig
* Description : Configures the data size for the selected SPI.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - SPI_DataSize: specifies the SPI data size.
* This parameter can be one of the following values:
* - SPI_DataSize_16b: Set data frame format to 16bit
* - SPI_DataSize_8b: Set data frame format to 8bit
* Output : None
* Return : None
*******************************************************************************/
void SPI_DataSizeConfig(SPI_TypeDef* SPIx, u16 SPI_DataSize)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_DATASIZE(SPI_DataSize));
/* Clear DFF bit */
SPIx->CR1 &= (u16)~SPI_DataSize_16b;
/* Set new DFF bit value */
SPIx->CR1 |= SPI_DataSize;
}
/*******************************************************************************
* Function Name : SPI_TransmitCRC
* Description : Transmit the SPIx CRC value.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* Output : None
* Return : None
*******************************************************************************/
void SPI_TransmitCRC(SPI_TypeDef* SPIx)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
/* Enable the selected SPI CRC transmission */
SPIx->CR1 |= CR1_CRCNext_Set;
}
/*******************************************************************************
* Function Name : SPI_CalculateCRC
* Description : Enables or disables the CRC value calculation of the
* transfered bytes.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - NewState: new state of the SPIx CRC value calculation.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void SPI_CalculateCRC(SPI_TypeDef* SPIx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected SPI CRC calculation */
SPIx->CR1 |= CR1_CRCEN_Set;
}
else
{
/* Disable the selected SPI CRC calculation */
SPIx->CR1 &= CR1_CRCEN_Reset;
}
}
/*******************************************************************************
* Function Name : SPI_GetCRC
* Description : Returns the transmit or the receive CRC register value for
* the specified SPI.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - SPI_CRC: specifies the CRC register to be read.
* This parameter can be one of the following values:
* - SPI_CRC_Tx: Selects Tx CRC register
* - SPI_CRC_Rx: Selects Rx CRC register
* Output : None
* Return : The selected CRC register value..
*******************************************************************************/
u16 SPI_GetCRC(SPI_TypeDef* SPIx, u8 SPI_CRC)
{
u16 crcreg = 0;
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_CRC(SPI_CRC));
if (SPI_CRC != SPI_CRC_Rx)
{
/* Get the Tx CRC register */
crcreg = SPIx->TXCRCR;
}
else
{
/* Get the Rx CRC register */
crcreg = SPIx->RXCRCR;
}
/* Return the selected CRC register */
return crcreg;
}
/*******************************************************************************
* Function Name : SPI_GetCRCPolynomial
* Description : Returns the CRC Polynomial register value for the specified SPI.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* Output : None
* Return : The CRC Polynomial register value.
*******************************************************************************/
u16 SPI_GetCRCPolynomial(SPI_TypeDef* SPIx)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
/* Return the CRC polynomial register */
return SPIx->CRCPR;
}
/*******************************************************************************
* Function Name : SPI_BiDirectionalLineConfig
* Description : Selects the data transfer direction in bi-directional mode
* for the specified SPI.
* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
* - SPI_Direction: specifies the data transfer direction in
* bi-directional mode.
* This parameter can be one of the following values:
* - SPI_Direction_Tx: Selects Tx transmission direction
* - SPI_Direction_Rx: Selects Rx receive direction
* Output : None
* Return : None
*******************************************************************************/
void SPI_BiDirectionalLineConfig(SPI_TypeDef* SPIx, u16 SPI_Direction)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_DIRECTION(SPI_Direction));
if (SPI_Direction == SPI_Direction_Tx)
{
/* Set the Tx only mode */
SPIx->CR1 |= SPI_Direction_Tx;
}
else
{
/* Set the Rx only mode */
SPIx->CR1 &= SPI_Direction_Rx;
}
}
/*******************************************************************************
* Function Name : SPI_I2S_GetFlagStatus
* Description : Checks whether the specified SPI/I2S flag is set or not.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - SPI_I2S_FLAG: specifies the SPI/I2S flag to check.
* This parameter can be one of the following values:
* - SPI_I2S_FLAG_TXE: Transmit buffer empty flag.
* - SPI_I2S_FLAG_RXNE: Receive buffer not empty flag.
* - SPI_I2S_FLAG_BSY: Busy flag.
* - SPI_I2S_FLAG_OVR: Overrun flag.
* - SPI_FLAG_MODF: Mode Fault flag.
* - SPI_FLAG_CRCERR: CRC Error flag.
* - I2S_FLAG_UDR: Underrun Error flag.
* - I2S_FLAG_CHSIDE: Channel Side flag.
* Output : None
* Return : The new state of SPI_I2S_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, u16 SPI_I2S_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_I2S_GET_FLAG(SPI_I2S_FLAG));
/* Check the status of the specified SPI/I2S flag */
if ((SPIx->SR & SPI_I2S_FLAG) != (u16)RESET)
{
/* SPI_I2S_FLAG is set */
bitstatus = SET;
}
else
{
/* SPI_I2S_FLAG is reset */
bitstatus = RESET;
}
/* Return the SPI_I2S_FLAG status */
return bitstatus;
}
/*******************************************************************************
* Function Name : SPI_I2S_ClearFlag
* Description : Clears the SPIx/I2Sx pending flags.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - SPI_I2S_FLAG: specifies the SPI/I2S flag to clear.
* This parameter can be one of the following values:
* - SPI_I2S_FLAG_OVR: Overrun flag
* - SPI_FLAG_MODF: Mode Fault flag.
* - SPI_FLAG_CRCERR: CRC Error flag.
* - I2S_FLAG_UDR: Underrun Error flag.
* Note: Before clearing OVR flag, it is mandatory to read
* SPI_I2S_DR register, so that the last data is not lost.
* Output : None
* Return : None
*******************************************************************************/
void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, u16 SPI_I2S_FLAG)
{
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_I2S_CLEAR_FLAG(SPI_I2S_FLAG));
/* SPI_FLAG_MODF flag clear */
if(SPI_I2S_FLAG == SPI_FLAG_MODF)
{
/* Read SR register */
(void)SPIx->SR;
/* Write on CR1 register */
SPIx->CR1 |= CR1_SPE_Set;
}
/* SPI_I2S_FLAG_OVR flag or I2S_FLAG_UDR flag clear */
else if ((SPI_I2S_FLAG == SPI_I2S_FLAG_OVR) || (SPI_I2S_FLAG == I2S_FLAG_UDR))
{
/* Read SR register (Before clearing OVR flag, it is mandatory to read
SPI_I2S_DR register)*/
(void)SPIx->SR;
}
else /* SPI_FLAG_CRCERR flag clear */
{
/* Clear the selected SPI flag */
SPIx->SR = (u16)~SPI_I2S_FLAG;
}
}
/*******************************************************************************
* Function Name : SPI_I2S_GetITStatus
* Description : Checks whether the specified SPI/I2S interrupt has occurred or not.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - SPI_I2S_IT: specifies the SPI/I2S interrupt source to check.
* This parameter can be one of the following values:
* - SPI_I2S_IT_TXE: Transmit buffer empty interrupt.
* - SPI_I2S_IT_RXNE: Receive buffer not empty interrupt.
* - SPI_I2S_IT_OVR: Overrun interrupt.
* - SPI_IT_MODF: Mode Fault interrupt.
* - SPI_IT_CRCERR: CRC Error interrupt.
* - I2S_IT_UDR: Underrun Error interrupt.
* Output : None
* Return : The new state of SPI_I2S_IT (SET or RESET).
*******************************************************************************/
ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)
{
ITStatus bitstatus = RESET;
u16 itpos = 0, itmask = 0, enablestatus = 0;
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_I2S_GET_IT(SPI_I2S_IT));
/* Get the SPI/I2S IT index */
itpos = (u16)((u16)0x01 << (SPI_I2S_IT & (u8)0x0F));
/* Get the SPI/I2S IT mask */
itmask = SPI_I2S_IT >> 4;
/* Set the IT mask */
itmask = (u16)((u16)0x01 << itmask);
/* Get the SPI_I2S_IT enable bit status */
enablestatus = (SPIx->CR2 & itmask) ;
/* Check the status of the specified SPI/I2S interrupt */
if (((SPIx->SR & itpos) != (u16)RESET) && enablestatus)
{
/* SPI_I2S_IT is set */
bitstatus = SET;
}
else
{
/* SPI_I2S_IT is reset */
bitstatus = RESET;
}
/* Return the SPI_I2S_IT status */
return bitstatus;
}
/*******************************************************************************
* Function Name : SPI_I2S_ClearITPendingBit
* Description : Clears the SPIx/I2Sx interrupt pending bits.
* Input : - SPIx: where x can be :
* - 1, 2 or 3 in SPI mode
* - 2 or 3 in I2S mode
* - SPI_I2S_IT: specifies the SPI/I2S interrupt pending bit to clear.
* This parameter can be one of the following values:
* - SPI_I2S_IT_OVR: Overrun interrupt.
* - SPI_IT_MODF: Mode Fault interrupt.
* - SPI_IT_CRCERR: CRC Error interrupt.
* - I2S_IT_UDR: Underrun Error interrupt.
* Output : None
* Return : None
*******************************************************************************/
void SPI_I2S_ClearITPendingBit(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)
{
u16 itpos = 0;
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_I2S_CLEAR_IT(SPI_I2S_IT));
/* SPI_IT_MODF pending bit clear */
if(SPI_I2S_IT == SPI_IT_MODF)
{
/* Read SR register */
(void)SPIx->SR;
/* Write on CR1 register */
SPIx->CR1 |= CR1_SPE_Set;
}
/* SPI_I2S_IT_OVR or I2S_IT_UDR pending bit clear */
else if((SPI_I2S_IT == SPI_I2S_IT_OVR) || (SPI_I2S_IT == I2S_IT_UDR))
{
/* Read SR register */
(void)(SPIx->SR);
}
else /* SPI_IT_CRCERR pending bit clear */
{
/* Get the SPI/I2S IT index */
itpos = (u16)((u16)0x01 << (SPI_I2S_IT & (u8)0x0F));
/* Clear the selected SPI/I2S interrupt pending bits */
SPIx->SR = (u16)~itpos;
}
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_systick.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the SysTick firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_systick.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* ---------------------- SysTick registers bit mask -------------------- */
/* CTRL TICKINT Mask */
#define CTRL_TICKINT_Set ((u32)0x00000002)
#define CTRL_TICKINT_Reset ((u32)0xFFFFFFFD)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : SysTick_CLKSourceConfig
* Description : Configures the SysTick clock source.
* Input : - SysTick_CLKSource: specifies the SysTick clock source.
* This parameter can be one of the following values:
* - SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8
* selected as SysTick clock source.
* - SysTick_CLKSource_HCLK: AHB clock selected as
* SysTick clock source.
* Output : None
* Return : None
*******************************************************************************/
void SysTick_CLKSourceConfig(u32 SysTick_CLKSource)
{
/* Check the parameters */
assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
{
SysTick->CTRL |= SysTick_CLKSource_HCLK;
}
else
{
SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
}
}
/*******************************************************************************
* Function Name : SysTick_SetReload
* Description : Sets SysTick Reload value.
* Input : - Reload: SysTick Reload new value.
* This parameter must be a number between 1 and 0xFFFFFF.
* Output : None
* Return : None
*******************************************************************************/
void SysTick_SetReload(u32 Reload)
{
/* Check the parameters */
assert_param(IS_SYSTICK_RELOAD(Reload));
SysTick->LOAD = Reload;
}
/*******************************************************************************
* Function Name : SysTick_CounterCmd
* Description : Enables or disables the SysTick counter.
* Input : - SysTick_Counter: new state of the SysTick counter.
* This parameter can be one of the following values:
* - SysTick_Counter_Disable: Disable counter
* - SysTick_Counter_Enable: Enable counter
* - SysTick_Counter_Clear: Clear counter value to 0
* Output : None
* Return : None
*******************************************************************************/
void SysTick_CounterCmd(u32 SysTick_Counter)
{
/* Check the parameters */
assert_param(IS_SYSTICK_COUNTER(SysTick_Counter));
if (SysTick_Counter == SysTick_Counter_Enable)
{
SysTick->CTRL |= SysTick_Counter_Enable;
}
else if (SysTick_Counter == SysTick_Counter_Disable)
{
SysTick->CTRL &= SysTick_Counter_Disable;
}
else /* SysTick_Counter == SysTick_Counter_Clear */
{
SysTick->VAL = SysTick_Counter_Clear;
}
}
/*******************************************************************************
* Function Name : SysTick_ITConfig
* Description : Enables or disables the SysTick Interrupt.
* Input : - NewState: new state of the SysTick Interrupt.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void SysTick_ITConfig(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
SysTick->CTRL |= CTRL_TICKINT_Set;
}
else
{
SysTick->CTRL &= CTRL_TICKINT_Reset;
}
}
/*******************************************************************************
* Function Name : SysTick_GetCounter
* Description : Gets SysTick counter value.
* Input : None
* Output : None
* Return : SysTick current value
*******************************************************************************/
u32 SysTick_GetCounter(void)
{
return(SysTick->VAL);
}
/*******************************************************************************
* Function Name : SysTick_GetFlagStatus
* Description : Checks whether the specified SysTick flag is set or not.
* Input : - SysTick_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* - SysTick_FLAG_COUNT
* - SysTick_FLAG_SKEW
* - SysTick_FLAG_NOREF
* Output : None
* Return : None
*******************************************************************************/
FlagStatus SysTick_GetFlagStatus(u8 SysTick_FLAG)
{
u32 statusreg = 0, tmp = 0 ;
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_SYSTICK_FLAG(SysTick_FLAG));
/* Get the SysTick register index */
tmp = SysTick_FLAG >> 3;
if (tmp == 2) /* The flag to check is in CTRL register */
{
statusreg = SysTick->CTRL;
}
else /* The flag to check is in CALIB register */
{
statusreg = SysTick->CALIB;
}
if ((statusreg & ((u32)1 << SysTick_FLAG)) != (u32)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_usart.c
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : This file provides all the USART firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_usart.h"
#include "stm32f10x_rcc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* USART UE Mask */
#define CR1_UE_Set ((u16)0x2000) /* USART Enable Mask */
#define CR1_UE_Reset ((u16)0xDFFF) /* USART Disable Mask */
/* USART WakeUp Method */
#define CR1_WAKE_Mask ((u16)0xF7FF) /* USART WakeUp Method Mask */
/* USART RWU Mask */
#define CR1_RWU_Set ((u16)0x0002) /* USART mute mode Enable Mask */
#define CR1_RWU_Reset ((u16)0xFFFD) /* USART mute mode Enable Mask */
#define CR1_SBK_Set ((u16)0x0001) /* USART Break Character send Mask */
#define CR1_CLEAR_Mask ((u16)0xE9F3) /* USART CR1 Mask */
#define CR2_Address_Mask ((u16)0xFFF0) /* USART address Mask */
/* USART LIN Mask */
#define CR2_LINEN_Set ((u16)0x4000) /* USART LIN Enable Mask */
#define CR2_LINEN_Reset ((u16)0xBFFF) /* USART LIN Disable Mask */
/* USART LIN Break detection */
#define CR2_LBDL_Mask ((u16)0xFFDF) /* USART LIN Break detection Mask */
#define CR2_STOP_CLEAR_Mask ((u16)0xCFFF) /* USART CR2 STOP Bits Mask */
#define CR2_CLOCK_CLEAR_Mask ((u16)0xF0FF) /* USART CR2 Clock Mask */
/* USART SC Mask */
#define CR3_SCEN_Set ((u16)0x0020) /* USART SC Enable Mask */
#define CR3_SCEN_Reset ((u16)0xFFDF) /* USART SC Disable Mask */
/* USART SC NACK Mask */
#define CR3_NACK_Set ((u16)0x0010) /* USART SC NACK Enable Mask */
#define CR3_NACK_Reset ((u16)0xFFEF) /* USART SC NACK Disable Mask */
/* USART Half-Duplex Mask */
#define CR3_HDSEL_Set ((u16)0x0008) /* USART Half-Duplex Enable Mask */
#define CR3_HDSEL_Reset ((u16)0xFFF7) /* USART Half-Duplex Disable Mask */
/* USART IrDA Mask */
#define CR3_IRLP_Mask ((u16)0xFFFB) /* USART IrDA LowPower mode Mask */
#define CR3_CLEAR_Mask ((u16)0xFCFF) /* USART CR3 Mask */
/* USART IrDA Mask */
#define CR3_IREN_Set ((u16)0x0002) /* USART IrDA Enable Mask */
#define CR3_IREN_Reset ((u16)0xFFFD) /* USART IrDA Disable Mask */
#define GTPR_LSB_Mask ((u16)0x00FF) /* Guard Time Register LSB Mask */
#define GTPR_MSB_Mask ((u16)0xFF00) /* Guard Time Register MSB Mask */
#define IT_Mask ((u16)0x001F) /* USART Interrupt Mask */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : USART_DeInit
* Description : Deinitializes the USARTx peripheral registers to their
* default reset values.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* Output : None
* Return : None
*******************************************************************************/
void USART_DeInit(USART_TypeDef* USARTx)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
switch (*(u32*)&USARTx)
{
case USART1_BASE:
RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
break;
case USART2_BASE:
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
break;
case USART3_BASE:
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
break;
case UART4_BASE:
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
break;
case UART5_BASE:
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
break;
default:
break;
}
}
/*******************************************************************************
* Function Name : USART_Init
* Description : Initializes the USARTx peripheral according to the specified
* parameters in the USART_InitStruct .
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_InitStruct: pointer to a USART_InitTypeDef structure
* that contains the configuration information for the
* specified USART peripheral.
* Output : None
* Return : None
*******************************************************************************/
void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
{
u32 tmpreg = 0x00, apbclock = 0x00;
u32 integerdivider = 0x00;
u32 fractionaldivider = 0x00;
u32 usartxbase = 0;
RCC_ClocksTypeDef RCC_ClocksStatus;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate));
assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
/* The hardware flow control is available only for USART1, USART2 and USART3 */
assert_param(IS_USART_PERIPH_HFC(USARTx, USART_InitStruct->USART_HardwareFlowControl));
usartxbase = (*(u32*)&USARTx);
/*---------------------------- USART CR2 Configuration -----------------------*/
tmpreg = USARTx->CR2;
/* Clear STOP[13:12] bits */
tmpreg &= CR2_STOP_CLEAR_Mask;
/* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
/* Set STOP[13:12] bits according to USART_StopBits value */
tmpreg |= (u32)USART_InitStruct->USART_StopBits;
/* Write to USART CR2 */
USARTx->CR2 = (u16)tmpreg;
/*---------------------------- USART CR1 Configuration -----------------------*/
tmpreg = USARTx->CR1;
/* Clear M, PCE, PS, TE and RE bits */
tmpreg &= CR1_CLEAR_Mask;
/* Configure the USART Word Length, Parity and mode ----------------------- */
/* Set the M bits according to USART_WordLength value */
/* Set PCE and PS bits according to USART_Parity value */
/* Set TE and RE bits according to USART_Mode value */
tmpreg |= (u32)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
USART_InitStruct->USART_Mode;
/* Write to USART CR1 */
USARTx->CR1 = (u16)tmpreg;
/*---------------------------- USART CR3 Configuration -----------------------*/
tmpreg = USARTx->CR3;
/* Clear CTSE and RTSE bits */
tmpreg &= CR3_CLEAR_Mask;
/* Configure the USART HFC -------------------------------------------------*/
/* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
tmpreg |= USART_InitStruct->USART_HardwareFlowControl;
/* Write to USART CR3 */
USARTx->CR3 = (u16)tmpreg;
/*---------------------------- USART BRR Configuration -----------------------*/
/* Configure the USART Baud Rate -------------------------------------------*/
RCC_GetClocksFreq(&RCC_ClocksStatus);
if (usartxbase == USART1_BASE)
{
apbclock = RCC_ClocksStatus.PCLK2_Frequency;
}
else
{
apbclock = RCC_ClocksStatus.PCLK1_Frequency;
}
/* Determine the integer part */
integerdivider = ((0x19 * apbclock) / (0x04 * (USART_InitStruct->USART_BaudRate)));
tmpreg = (integerdivider / 0x64) << 0x04;
/* Determine the fractional part */
fractionaldivider = integerdivider - (0x64 * (tmpreg >> 0x04));
tmpreg |= ((((fractionaldivider * 0x10) + 0x32) / 0x64)) & ((u8)0x0F);
/* Write to USART BRR */
USARTx->BRR = (u16)tmpreg;
}
/*******************************************************************************
* Function Name : USART_StructInit
* Description : Fills each USART_InitStruct member with its default value.
* Input : - USART_InitStruct: pointer to a USART_InitTypeDef structure
* which will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
{
/* USART_InitStruct members default value */
USART_InitStruct->USART_BaudRate = 9600;
USART_InitStruct->USART_WordLength = USART_WordLength_8b;
USART_InitStruct->USART_StopBits = USART_StopBits_1;
USART_InitStruct->USART_Parity = USART_Parity_No ;
USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None;
}
/*******************************************************************************
* Function Name : USART_ClockInit
* Description : Initializes the USARTx peripheral Clock according to the
* specified parameters in the USART_ClockInitStruct .
* Input : - USARTx: where x can be 1, 2, 3 to select the USART peripheral.
* Note: The Smart Card mode is not available for UART4 and UART5.
* - USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
* structure that contains the configuration information for
* the specified USART peripheral.
* Output : None
* Return : None
*******************************************************************************/
void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
{
u32 tmpreg = 0x00;
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
/*---------------------------- USART CR2 Configuration -----------------------*/
tmpreg = USARTx->CR2;
/* Clear CLKEN, CPOL, CPHA and LBCL bits */
tmpreg &= CR2_CLOCK_CLEAR_Mask;
/* Configure the USART Clock, CPOL, CPHA and LastBit ------------*/
/* Set CLKEN bit according to USART_Clock value */
/* Set CPOL bit according to USART_CPOL value */
/* Set CPHA bit according to USART_CPHA value */
/* Set LBCL bit according to USART_LastBit value */
tmpreg |= (u32)USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL |
USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit;
/* Write to USART CR2 */
USARTx->CR2 = (u16)tmpreg;
}
/*******************************************************************************
* Function Name : USART_ClockStructInit
* Description : Fills each USART_ClockInitStruct member with its default value.
* Input : - USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
* structure which will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
{
/* USART_ClockInitStruct members default value */
USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
}
/*******************************************************************************
* Function Name : USART_Cmd
* Description : Enables or disables the specified USART peripheral.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* : - NewState: new state of the USARTx peripheral.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected USART by setting the UE bit in the CR1 register */
USARTx->CR1 |= CR1_UE_Set;
}
else
{
/* Disable the selected USART by clearing the UE bit in the CR1 register */
USARTx->CR1 &= CR1_UE_Reset;
}
}
/*******************************************************************************
* Function Name : USART_ITConfig
* Description : Enables or disables the specified USART interrupts.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_IT: specifies the USART interrupt sources to be
* enabled or disabled.
* This parameter can be one of the following values:
* - USART_IT_CTS: CTS change interrupt (not available for
* UART4 and UART5)
* - USART_IT_LBD: LIN Break detection interrupt
* - USART_IT_TXE: Tansmit Data Register empty interrupt
* - USART_IT_TC: Transmission complete interrupt
* - USART_IT_RXNE: Receive Data register not empty
* interrupt
* - USART_IT_IDLE: Idle line detection interrupt
* - USART_IT_PE: Parity Error interrupt
* - USART_IT_ERR: Error interrupt(Frame error, noise
* error, overrun error)
* - NewState: new state of the specified USARTx interrupts.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_ITConfig(USART_TypeDef* USARTx, u16 USART_IT, FunctionalState NewState)
{
u32 usartreg = 0x00, itpos = 0x00, itmask = 0x00;
u32 usartxbase = 0x00;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CONFIG_IT(USART_IT));
assert_param(IS_USART_PERIPH_IT(USARTx, USART_IT)); /* The CTS interrupt is not available for UART4 and UART5 */
assert_param(IS_FUNCTIONAL_STATE(NewState));
usartxbase = (*(u32*)&(USARTx));
/* Get the USART register index */
usartreg = (((u8)USART_IT) >> 0x05);
/* Get the interrupt position */
itpos = USART_IT & IT_Mask;
itmask = (((u32)0x01) << itpos);
if (usartreg == 0x01) /* The IT is in CR1 register */
{
usartxbase += 0x0C;
}
else if (usartreg == 0x02) /* The IT is in CR2 register */
{
usartxbase += 0x10;
}
else /* The IT is in CR3 register */
{
usartxbase += 0x14;
}
if (NewState != DISABLE)
{
*(vu32*)usartxbase |= itmask;
}
else
{
*(vu32*)usartxbase &= ~itmask;
}
}
/*******************************************************************************
* Function Name : USART_DMACmd
* Description : Enables or disables the USART’s DMA interface.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3 or UART4.
* Note: The DMA mode is not available for UART5.
* - USART_DMAReq: specifies the DMA request.
* This parameter can be any combination of the following values:
* - USART_DMAReq_Tx: USART DMA transmit request
* - USART_DMAReq_Rx: USART DMA receive request
* - NewState: new state of the DMA Request sources.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_DMACmd(USART_TypeDef* USARTx, u16 USART_DMAReq, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_1234_PERIPH(USARTx));
assert_param(IS_USART_DMAREQ(USART_DMAReq));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the DMA transfer for selected requests by setting the DMAT and/or
DMAR bits in the USART CR3 register */
USARTx->CR3 |= USART_DMAReq;
}
else
{
/* Disable the DMA transfer for selected requests by clearing the DMAT and/or
DMAR bits in the USART CR3 register */
USARTx->CR3 &= (u16)~USART_DMAReq;
}
}
/*******************************************************************************
* Function Name : USART_SetAddress
* Description : Sets the address of the USART node.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_Address: Indicates the address of the USART node.
* Output : None
* Return : None
*******************************************************************************/
void USART_SetAddress(USART_TypeDef* USARTx, u8 USART_Address)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_ADDRESS(USART_Address));
/* Clear the USART address */
USARTx->CR2 &= CR2_Address_Mask;
/* Set the USART address node */
USARTx->CR2 |= USART_Address;
}
/*******************************************************************************
* Function Name : USART_WakeUpConfig
* Description : Selects the USART WakeUp method.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_WakeUp: specifies the USART wakeup method.
* This parameter can be one of the following values:
* - USART_WakeUp_IdleLine: WakeUp by an idle line detection
* - USART_WakeUp_AddressMark: WakeUp by an address mark
* Output : None
* Return : None
*******************************************************************************/
void USART_WakeUpConfig(USART_TypeDef* USARTx, u16 USART_WakeUp)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_WAKEUP(USART_WakeUp));
USARTx->CR1 &= CR1_WAKE_Mask;
USARTx->CR1 |= USART_WakeUp;
}
/*******************************************************************************
* Function Name : USART_ReceiverWakeUpCmd
* Description : Determines if the USART is in mute mode or not.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - NewState: new state of the USART mute mode.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_ReceiverWakeUpCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the USART mute mode by setting the RWU bit in the CR1 register */
USARTx->CR1 |= CR1_RWU_Set;
}
else
{
/* Disable the USART mute mode by clearing the RWU bit in the CR1 register */
USARTx->CR1 &= CR1_RWU_Reset;
}
}
/*******************************************************************************
* Function Name : USART_LINBreakDetectLengthConfig
* Description : Sets the USART LIN Break detection length.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_LINBreakDetectLength: specifies the LIN break
* detection length.
* This parameter can be one of the following values:
* - USART_LINBreakDetectLength_10b: 10-bit break detection
* - USART_LINBreakDetectLength_11b: 11-bit break detection
* Output : None
* Return : None
*******************************************************************************/
void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, u16 USART_LINBreakDetectLength)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));
USARTx->CR2 &= CR2_LBDL_Mask;
USARTx->CR2 |= USART_LINBreakDetectLength;
}
/*******************************************************************************
* Function Name : USART_LINCmd
* Description : Enables or disables the USART’s LIN mode.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - NewState: new state of the USART LIN mode.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the LIN mode by setting the LINEN bit in the CR2 register */
USARTx->CR2 |= CR2_LINEN_Set;
}
else
{
/* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
USARTx->CR2 &= CR2_LINEN_Reset;
}
}
/*******************************************************************************
* Function Name : USART_SendData
* Description : Transmits single data through the USARTx peripheral.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - Data: the data to transmit.
* Output : None
* Return : None
*******************************************************************************/
void USART_SendData(USART_TypeDef* USARTx, u16 Data)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DATA(Data));
/* Transmit Data */
USARTx->DR = (Data & (u16)0x01FF);
}
/*******************************************************************************
* Function Name : USART_ReceiveData
* Description : Returns the most recent received data by the USARTx peripheral.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* Output : None
* Return : The received data.
*******************************************************************************/
u16 USART_ReceiveData(USART_TypeDef* USARTx)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
/* Receive Data */
return (u16)(USARTx->DR & (u16)0x01FF);
}
/*******************************************************************************
* Function Name : USART_SendBreak
* Description : Transmits break characters.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* Output : None
* Return : None
*******************************************************************************/
void USART_SendBreak(USART_TypeDef* USARTx)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
/* Send break characters */
USARTx->CR1 |= CR1_SBK_Set;
}
/*******************************************************************************
* Function Name : USART_SetGuardTime
* Description : Sets the specified USART guard time.
* Input : - USARTx: where x can be 1, 2 or 3 to select the USART
* peripheral.
* Note: The guard time bits are not available for UART4 and UART5.
* - USART_GuardTime: specifies the guard time.
* Output : None
* Return : None
*******************************************************************************/
void USART_SetGuardTime(USART_TypeDef* USARTx, u8 USART_GuardTime)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
/* Clear the USART Guard time */
USARTx->GTPR &= GTPR_LSB_Mask;
/* Set the USART guard time */
USARTx->GTPR |= (u16)((u16)USART_GuardTime << 0x08);
}
/*******************************************************************************
* Function Name : USART_SetPrescaler
* Description : Sets the system clock prescaler.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* Note: The function is used for IrDA mode with UART4 and UART5.
* - USART_Prescaler: specifies the prescaler clock.
* Output : None
* Return : None
*******************************************************************************/
void USART_SetPrescaler(USART_TypeDef* USARTx, u8 USART_Prescaler)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
/* Clear the USART prescaler */
USARTx->GTPR &= GTPR_MSB_Mask;
/* Set the USART prescaler */
USARTx->GTPR |= USART_Prescaler;
}
/*******************************************************************************
* Function Name : USART_SmartCardCmd
* Description : Enables or disables the USART’s Smart Card mode.
* Input : - USARTx: where x can be 1, 2 or 3 to select the USART
* peripheral.
* Note: The Smart Card mode is not available for UART4 and UART5.
* - NewState: new state of the Smart Card mode.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the SC mode by setting the SCEN bit in the CR3 register */
USARTx->CR3 |= CR3_SCEN_Set;
}
else
{
/* Disable the SC mode by clearing the SCEN bit in the CR3 register */
USARTx->CR3 &= CR3_SCEN_Reset;
}
}
/*******************************************************************************
* Function Name : USART_SmartCardNACKCmd
* Description : Enables or disables NACK transmission.
* Input : - USARTx: where x can be 1, 2 or 3 to select the USART
* peripheral.
* Note: The Smart Card mode is not available for UART4 and UART5.
* - NewState: new state of the NACK transmission.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the NACK transmission by setting the NACK bit in the CR3 register */
USARTx->CR3 |= CR3_NACK_Set;
}
else
{
/* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
USARTx->CR3 &= CR3_NACK_Reset;
}
}
/*******************************************************************************
* Function Name : USART_HalfDuplexCmd
* Description : Enables or disables the USART’s Half Duplex communication.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - NewState: new state of the USART Communication.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
USARTx->CR3 |= CR3_HDSEL_Set;
}
else
{
/* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
USARTx->CR3 &= CR3_HDSEL_Reset;
}
}
/*******************************************************************************
* Function Name : USART_IrDAConfig
* Description : Configures the USART’s IrDA interface.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_IrDAMode: specifies the IrDA mode.
* This parameter can be one of the following values:
* - USART_IrDAMode_LowPower
* - USART_IrDAMode_Normal
* Output : None
* Return : None
*******************************************************************************/
void USART_IrDAConfig(USART_TypeDef* USARTx, u16 USART_IrDAMode)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));
USARTx->CR3 &= CR3_IRLP_Mask;
USARTx->CR3 |= USART_IrDAMode;
}
/*******************************************************************************
* Function Name : USART_IrDACmd
* Description : Enables or disables the USART’s IrDA interface.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - NewState: new state of the IrDA mode.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the IrDA mode by setting the IREN bit in the CR3 register */
USARTx->CR3 |= CR3_IREN_Set;
}
else
{
/* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
USARTx->CR3 &= CR3_IREN_Reset;
}
}
/*******************************************************************************
* Function Name : USART_GetFlagStatus
* Description : Checks whether the specified USART flag is set or not.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* - USART_FLAG_CTS: CTS Change flag (not available for
* UART4 and UART5)
* - USART_FLAG_LBD: LIN Break detection flag
* - USART_FLAG_TXE: Transmit data register empty flag
* - USART_FLAG_TC: Transmission Complete flag
* - USART_FLAG_RXNE: Receive data register not empty flag
* - USART_FLAG_IDLE: Idle Line detection flag
* - USART_FLAG_ORE: OverRun Error flag
* - USART_FLAG_NE: Noise Error flag
* - USART_FLAG_FE: Framing Error flag
* - USART_FLAG_PE: Parity Error flag
* Output : None
* Return : The new state of USART_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, u16 USART_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_FLAG(USART_FLAG));
assert_param(IS_USART_PERIPH_FLAG(USARTx, USART_FLAG)); /* The CTS flag is not available for UART4 and UART5 */
if ((USARTx->SR & USART_FLAG) != (u16)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/*******************************************************************************
* Function Name : USART_ClearFlag
* Description : Clears the USARTx's pending flags.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_FLAG: specifies the flag to clear.
* This parameter can be any combination of the following values:
* - USART_FLAG_CTS: CTS Change flag (not available for
* UART4 and UART5).
* - USART_FLAG_LBD: LIN Break detection flag.
* - USART_FLAG_TC: Transmission Complete flag.
* - USART_FLAG_RXNE: Receive data register not empty flag.
* - USART_FLAG_IDLE: Idle Line detection flag.
* - USART_FLAG_ORE: OverRun Error flag.
* - USART_FLAG_NE: Noise Error flag.
* - USART_FLAG_FE: Framing Error flag.
* - USART_FLAG_PE: Parity Error flag.
*
* Note: - For IDLE, ORE, NE, FE and PE flags user has to read
* the USART DR register after calling this function.
* - TXE flag can't be cleared by this function, it's
* cleared only by a write to the USART DR register.
* Output : None
* Return : None
*******************************************************************************/
void USART_ClearFlag(USART_TypeDef* USARTx, u16 USART_FLAG)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
assert_param(IS_USART_PERIPH_FLAG(USARTx, USART_FLAG)); /* The CTS flag is not available for UART4 and UART5 */
USARTx->SR = (u16)~USART_FLAG;
}
/*******************************************************************************
* Function Name : USART_GetITStatus
* Description : Checks whether the specified USART interrupt has occurred or not.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_IT: specifies the USART interrupt source to check.
* This parameter can be one of the following values:
* - USART_IT_CTS: CTS change interrupt (not available for
* UART4 and UART5)
* - USART_IT_LBD: LIN Break detection interrupt
* - USART_IT_TXE: Tansmit Data Register empty interrupt
* - USART_IT_TC: Transmission complete interrupt
* - USART_IT_RXNE: Receive Data register not empty
* interrupt
* - USART_IT_IDLE: Idle line detection interrupt
* - USART_IT_ORE: OverRun Error interrupt
* - USART_IT_NE: Noise Error interrupt
* - USART_IT_FE: Framing Error interrupt
* - USART_IT_PE: Parity Error interrupt
* Output : None
* Return : The new state of USART_IT (SET or RESET).
*******************************************************************************/
ITStatus USART_GetITStatus(USART_TypeDef* USARTx, u16 USART_IT)
{
u32 bitpos = 0x00, itmask = 0x00, usartreg = 0x00;
ITStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_IT(USART_IT));
assert_param(IS_USART_PERIPH_IT(USARTx, USART_IT)); /* The CTS interrupt is not available for UART4 and UART5 */
/* Get the USART register index */
usartreg = (((u8)USART_IT) >> 0x05);
/* Get the interrupt position */
itmask = USART_IT & IT_Mask;
itmask = (u32)0x01 << itmask;
if (usartreg == 0x01) /* The IT is in CR1 register */
{
itmask &= USARTx->CR1;
}
else if (usartreg == 0x02) /* The IT is in CR2 register */
{
itmask &= USARTx->CR2;
}
else /* The IT is in CR3 register */
{
itmask &= USARTx->CR3;
}
bitpos = USART_IT >> 0x08;
bitpos = (u32)0x01 << bitpos;
bitpos &= USARTx->SR;
if ((itmask != (u16)RESET)&&(bitpos != (u16)RESET))
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/*******************************************************************************
* Function Name : USART_ClearITPendingBit
* Description : Clears the USARTx’s interrupt pending bits.
* Input : - USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* - USART1, USART2, USART3, UART4 or UART5.
* - USART_IT: specifies the interrupt pending bit to clear.
* This parameter can be one of the following values:
* - USART_IT_CTS: CTS change interrupt (not available for
* UART4 and UART5)
* - USART_IT_LBD: LIN Break detection interrupt
* - USART_IT_TC: Transmission complete interrupt.
* - USART_IT_RXNE: Receive Data register not empty interrupt.
* - USART_IT_IDLE: Idle line detection interrupt.
* - USART_IT_ORE: OverRun Error interrupt.
* - USART_IT_NE: Noise Error interrupt.
* - USART_IT_FE: Framing Error interrupt.
* - USART_IT_PE: Parity Error interrupt.
*
* Note: - For IDLE, ORE, NE, FE and PE pending bits user has to
* read the USART DR register after calling this function.
* - TXE pending bit can't be cleared by this function, it's
* cleared only by a write to the USART DR register.
* Output : None
* Return : None
*******************************************************************************/
void USART_ClearITPendingBit(USART_TypeDef* USARTx, u16 USART_IT)
{
u16 bitpos = 0x00, itmask = 0x00;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CLEAR_IT(USART_IT));
assert_param(IS_USART_PERIPH_IT(USARTx, USART_IT)); /* The CTS interrupt is not available for UART4 and UART5 */
bitpos = USART_IT >> 0x08;
itmask = (u16)((u16)0x01 << bitpos);
USARTx->SR = (u16)~itmask;
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/