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First version of STR75x RIDE port and demo.

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Richard Barry 2006-11-19 13:20:37 +00:00
parent b2a52ede55
commit 6ac900dc95
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Demo/ARM7_STR75x_GCC/STLibrary/src/75x_wdg.c Normal file
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name : 75x_wdg.c
* Author : MCD Application Team
* Date First Issued : 03/10/2006
* Description : This file provides all the WDG 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_wdg.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Registers reset value */
#define WDG_Preload_Mask 0xFFFF
#define WDG_Prescaler_Mask 0xFF
/* WDG Start/Stop counter */
#define WDG_Counter_Start_Mask 0x0002
#define WDG_Counter_Stop_Mask 0xFFFD
/* WDG Sequence */
#define WDG_KeyValue1_Mask 0xA55A
#define WDG_KeyValue2_Mask 0x5AA5
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/******************************************************************************
* Function Name : WDG_DeInit
* Description : Deinitializes the WDG peripheral registers to their default
* reset values.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void WDG_DeInit(void)
{
/* Reset all the WDG registers */
WDG->CR = 0x0000;
WDG->PR = 0x00FF;
WDG->VR = 0xFFFF;
WDG->CNT = 0xFFFF;
WDG->SR = 0x0000;
WDG->MR = 0x0000;
WDG->KR = 0x0000;
}
/*******************************************************************************
* Function Name : WDG_Init
* Description : Initializes WDG peripheral according to the specified
* parameters in the WDG_InitStruct.
* Input : WDG_InitStruct: pointer to a WDG_InitTypeDef structure that
* contains the configuration information for the WDG peripheral.
* Output : None
* Return : None
*******************************************************************************/
void WDG_Init(WDG_InitTypeDef* WDG_InitStruct)
{
/* Configure WDG Prescaler register value */
WDG->PR = WDG_InitStruct->WDG_Prescaler;
/* Configure WDG Pre-load register value */
WDG->VR = WDG_InitStruct->WDG_Preload ;
if(WDG_InitStruct->WDG_Mode == WDG_Mode_WDG)
{
/* Select WDG mode */
WDG->CR |= WDG_Mode_WDG ;
}
else
{
/* Select Timer mode */
WDG->CR &= WDG_Mode_Timer;
}
}
/*******************************************************************************
* Function Name : WDG_StructInit
* Description : Fills each WDG_InitStruct member with its default value.
* Input : WDG_InitStruct : pointer to a WDG_InitTypeDef structure
* which will be initialized.
* Output : None
* Return : None
*******************************************************************************/
void WDG_StructInit(WDG_InitTypeDef *WDG_InitStruct)
{
/* Initialize mode */
WDG_InitStruct->WDG_Mode = WDG_Mode_Timer;
/* Initialize Preload */
WDG_InitStruct->WDG_Preload = WDG_Preload_Mask ;
/* Initialize Prescaler */
WDG_InitStruct->WDG_Prescaler = WDG_Prescaler_Mask;
}
/*******************************************************************************
* Function Name : WDG_Cmd
* Description : Enables or disables the WDG peripheral.
* Input : NewState: new state of the WDG peripheral.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void WDG_Cmd(FunctionalState NewState)
{
if((WDG->CR & WDG_Mode_WDG) == 0)
{
/* Timer mode */
if(NewState == ENABLE)
{
/* Start timer by setting SC bit in Control register */
WDG->CR |= WDG_Counter_Start_Mask;
}
else
{
/* Stop timer by clearing SC bit in Control register */
WDG->CR &= WDG_Counter_Stop_Mask;
}
}
else
{
/* Watchdog mode */
if(NewState == ENABLE)
{
WDG->KR = WDG_KeyValue1_Mask;
WDG->KR = WDG_KeyValue2_Mask;
}
}
}
/*******************************************************************************
* Function Name : WDG_ITConfig
* Description : Enables or disables the WDG End of Count(EC) interrupt.
* Input : Newstate: new state of the WDG End of Count(EC) interrupt.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void WDG_ITConfig(FunctionalState NewState)
{
if(NewState == ENABLE)
{
/* Enable the End of Count interrupt */
WDG->MR |= WDG_IT_EC;
}
else
{
/* Disable the End of Count interrupt */
WDG->MR &= ~WDG_IT_EC;
}
}
/*******************************************************************************
* Function Name : WDG_GetCounter
* Description : Gets the WDG’s current counter value.
* Input : None
* Output : None
* Return : The WDG current counter value
*******************************************************************************/
u16 WDG_GetCounter(void)
{
return WDG->CNT;
}
/*******************************************************************************
* Function Name : WDG_GetFlagStatus
* Description : Checks whether the WDG End of Count(EC) flag is set or not.
* Input : None
* Output : None
* Return : The new state of WDG End of Count(EC) flag (SET or RESET).
*******************************************************************************/
FlagStatus WDG_GetFlagStatus(void)
{
if((WDG->SR & WDG_FLAG_EC) != RESET )
{
return SET;
}
else
{
return RESET;
}
}
/*******************************************************************************
* Function Name : WDG_ClearFlag
* Description : Clears the WDG’s End of Count(EC) pending flag.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void WDG_ClearFlag(void)
{
/* Clear the EC pending bit */
WDG->SR &= ~WDG_FLAG_EC;
}
/*******************************************************************************
* Function Name : WDG_GetITStatus
* Description : Checks whether the WDG End of Count(EC) interrupt has
* occurred or not.
* Input : None
* Output : None
* Return : The new state of WDG End of Count(EC) interrupt (SET or RESET).
*******************************************************************************/
ITStatus WDG_GetITStatus(void)
{
if(((WDG->SR & WDG_IT_EC) != RESET )&&((WDG->MR & WDG_IT_EC) != RESET ))
{
return SET;
}
else
{
return RESET;
}
}
/*******************************************************************************
* Function Name : WDG_ClearITPendingBit
* Description : Clears the WDG's End of Count(EC) interrupt pending bit.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void WDG_ClearITPendingBit(void)
{
/* Clear the EC pending bit */
WDG->SR &= ~WDG_IT_EC;
}
/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/