Demo/ARM7_STR75x_IAR/STLibrary/src/75x_eic.c

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+/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
+* File Name          : 75x_eic.c
+* Author             : MCD Application Team
+* Date First Issued  : 03/10/2006
+* Description        : This file provides all the EIC software functions.
+********************************************************************************
+* History:
+* 07/17/2006 : V1.0
+* 03/10/2006 : V0.1
+********************************************************************************
+* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
+* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "75x_eic.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define EIC_IRQEnable_Mask     0x00000001
+#define EIC_IRQDisable_Mask    0xFFFFFFFE
+
+#define EIC_FIQEnable_Mask     0x00000002
+#define EIC_FIQDisable_Mask    0xFFFFFFFD
+
+#define EIC_SIPL_Mask          0x0000000F
+#define EIC_SIPL_Reset_Mask    0xFFFFFFF0
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name  : EIC_DeInit
+* Description    : Deinitializes the EIC peripheral registers to their default
+*                  reset values.
+* Input          : None
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_DeInit(void)
+{
+  EIC->ICR = 0x00;
+  EIC->CIPR = 0x00;
+  EIC->FIR = 0x0C;
+  EIC->IER = 0x00;
+  EIC->IPR = 0xFFFFFFFF;
+}
+
+/*******************************************************************************
+* Function Name  : EIC_IRQInit
+* Description    : Configures the IRQ channels according to the specified
+*                  parameters in the EIC_IRQInitStruct.
+* Input          : EIC_IRQInitStruct: pointer to a EIC_IRQInitTypeDef structure.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_IRQInit(EIC_IRQInitTypeDef* EIC_IRQInitStruct)
+{
+  u32 Tmp = 0;
+
+  if(EIC_IRQInitStruct->EIC_IRQChannelCmd == ENABLE)
+  {
+    /* Enable the selected IRQ channel */
+    EIC->IER |= 1 << EIC_IRQInitStruct->EIC_IRQChannel;
+
+    /* Configure the selected IRQ channel priority ***************************/
+    /* Clear SIPL[3:0] bits */
+    EIC->SIRn[EIC_IRQInitStruct->EIC_IRQChannel] &= EIC_SIPL_Reset_Mask;
+
+    /* Configure SIPL[3:0] bits according to EIC_IRQChannelPriority parameter */
+    Tmp = EIC_IRQInitStruct->EIC_IRQChannelPriority & EIC_SIPL_Mask;
+    EIC->SIRn[EIC_IRQInitStruct->EIC_IRQChannel] |= Tmp;
+  }
+  else
+  {
+    /* Disable the select IRQ channel */
+    EIC->IER &=~ (1 << EIC_IRQInitStruct->EIC_IRQChannel);
+  }
+}
+
+/*******************************************************************************
+* Function Name  : EIC_FIQInit
+* Description    : Configures the FIQ channels according to the specified
+*                  parameters in the EIC_FIQInitStruct.
+* Input          : EIC_FIQInitStruct: pointer to a EIC_FIQInitTypeDef structure.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_FIQInit(EIC_FIQInitTypeDef* EIC_FIQInitStruct)
+{
+  if(EIC_FIQInitStruct->EIC_FIQChannelCmd == ENABLE)
+  {
+    /* Enable the selected FIQ channel */
+    EIC->FIER |= EIC_FIQInitStruct->EIC_FIQChannel ;
+  }
+  else
+  {
+    /* Disable the selected FIQ channel */
+    EIC->FIER &= ~EIC_FIQInitStruct->EIC_FIQChannel;
+  }
+}
+
+/*******************************************************************************
+* Function Name  : EIC_IRQStructInit
+* Description    : Fills each EIC_IRQInitStruct member with its default value.
+* Input          : EIC_IRQInitStruct: pointer to a EIC_IRQInitTypeDef structure
+*                  which will be initialized.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_IRQStructInit(EIC_IRQInitTypeDef* EIC_IRQInitStruct)
+{
+  EIC_IRQInitStruct->EIC_IRQChannel = 0x1F;
+  EIC_IRQInitStruct->EIC_IRQChannelPriority = 0;
+  EIC_IRQInitStruct->EIC_IRQChannelCmd = DISABLE;
+}
+
+/*******************************************************************************
+* Function Name  : EIC_FIQStructInit
+* Description    : Fills each EIC_FIQInitStruct member with its default value.
+* Input          : EIC_FIQInitStruct: pointer to a EIC_FIQInitTypeDef structure
+*                  which will be initialized.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_FIQStructInit(EIC_FIQInitTypeDef* EIC_FIQInitStruct)
+{
+  EIC_FIQInitStruct->EIC_FIQChannel = 0x03;
+  EIC_FIQInitStruct->EIC_FIQChannelCmd = DISABLE;
+}
+
+/*******************************************************************************
+* Function Name  : EIC_IRQCmd
+* Description    : Enables or disables EIC IRQ output request to CPU.
+* Input          : NewState: new state of the EIC IRQ output request to CPU.
+*                  This parameter can be: ENABLE or DISABLE.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_IRQCmd(FunctionalState NewState)
+{
+  if(NewState == ENABLE)
+  {
+    /* Enable EIC IRQ output request to CPU */
+    EIC->ICR |= EIC_IRQEnable_Mask;
+  }
+  else
+  {
+    /* Disable EIC IRQ output request to CPU */
+    EIC->ICR &= EIC_IRQDisable_Mask;
+  }
+}
+
+/*******************************************************************************
+* Function Name  : EIC_FIQCmd
+* Description    : Enables or disables EIC FIQ output request to CPU.
+* Input          : NewState: new state of the EIC FIQ output request to CPU.
+*                  This parameter can be: ENABLE or DISABLE.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_FIQCmd(FunctionalState NewState)
+{
+  if(NewState == ENABLE)
+  {
+    /* Enable EIC FIQ output request to CPU */
+    EIC->ICR |= EIC_FIQEnable_Mask;
+  }
+  else
+  {
+    /* Disable EIC FIQ output request to CPU */
+    EIC->ICR &= EIC_FIQDisable_Mask;
+  }
+}
+
+/*******************************************************************************
+* Function Name  : EIC_GetCurrentIRQChannel
+* Description    : Returns the current served IRQ channel identifier.
+* Input          : None
+* Output         : None
+* Return         : The current served IRQ channel.
+*******************************************************************************/
+u8 EIC_GetCurrentIRQChannel(void)
+{
+  /* Read and return the CIC[4:0] bits of CICR register */
+  return ((u8) (EIC->CICR));
+}
+
+/*******************************************************************************
+* Function Name  : EIC_GetCurrentIRQChannelPriority
+* Description    : Returns the priority level of the current served IRQ channel.
+* Input          : None
+* Output         : None
+* Return         : The priority level of the current served IRQ channel.
+*******************************************************************************/
+u8 EIC_GetCurrentIRQChannelPriority(void)
+{
+  /* Read and return the CIP[3:0] bits of CIPR register */
+  return ((u8) (EIC->CIPR));
+}
+
+/*******************************************************************************
+* Function Name  : EIC_CurrentIRQPriorityConfig
+* Description    : Changes the priority of the current served IRQ channel.
+*                  The new priority value must be higher, or equal, than the
+*                  priority value associated to the interrupt channel currently
+*                  serviced.
+* Input          : NewPriority: new priority value of the IRQ interrupt routine
+*                  currently serviced.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_CurrentIRQPriorityConfig(u8 NewPriority)
+{
+  /* Disable EIC IRQ output request to CPU */
+  EIC->ICR &= EIC_IRQDisable_Mask;
+
+  /* Change the current priority */
+  EIC->CIPR = NewPriority;
+
+  /* Enable EIC IRQ output request to CPU  */
+  EIC->ICR |= EIC_IRQEnable_Mask;
+}
+
+/*******************************************************************************
+* Function Name  : EIC_GetCurrentFIQChannel
+* Description    : Returns the current served FIQ channel identifier.
+* Input          : None
+* Output         : None
+* Return         : The current served FIQ channel.
+*******************************************************************************/
+u8 EIC_GetCurrentFIQChannel(void)
+{
+  /* Read and return the FIP[1:0] bits of FIPR register */
+  return ((u8) (EIC->FIPR));
+}
+
+/*******************************************************************************
+* Function Name  : EIC_ClearFIQPendingBit
+* Description    : Clears the pending bit of the selected FIQ Channel.
+* Input          : EIC_FIQChannel: specifies the FIQ channel to clear its
+*                  pending bit.
+* Output         : None
+* Return         : None
+*******************************************************************************/
+void EIC_ClearFIQPendingBit(u8 EIC_FIQChannel)
+{
+  /* Clear the correspondent FIQ pending bit */
+  EIC->FIPR = EIC_FIQChannel ;
+}
+
+/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/