stm32f4xx_it.c

STM32F4-Discovery IWDG keil&iar例程

/**
  ******************************************************************************
  * @file    IWDG/stm32f4xx_it.c 
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    19-September-2011
  * @brief   Main Interrupt Service Routines.
  *          This file provides template for all exceptions handler and 
  *          peripherals interrupt service routine.
  ******************************************************************************
  * @attention
  *
  * 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.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_it.h"
#include "stm32f4_discovery.h"

/** @addtogroup STM32F4xx_StdPeriph_Examples
  * @{
  */

/** @addtogroup IWDG_Example
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern __IO uint32_t TimingDelay;
extern __IO uint32_t PeriodValue;
extern __IO uint32_t CaptureNumber;
uint16_t tmpCC4[2] = {0, 0},var1 = 0;

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/******************************************************************************/
/*            Cortex-M4 Processor Exceptions Handlers                         */
/******************************************************************************/

/**
  * @brief   This function handles NMI exception.
  * @param  None
  * @retval None
  */
void NMI_Handler(void)
{
}

/**
  * @brief  This function handles Hard Fault exception.
  * @param  None
  * @retval None
  */
void HardFault_Handler(void)
{
  STM_EVAL_LEDOn(LED5);
  /* Go to infinite loop when Hard Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Memory Manage exception.
  * @param  None
  * @retval None
  */
void MemManage_Handler(void)
{
  /* Go to infinite loop when Memory Manage exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Bus Fault exception.
  * @param  None
  * @retval None
  */
void BusFault_Handler(void)
{
  /* Go to infinite loop when Bus Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Usage Fault exception.
  * @param  None
  * @retval None
  */
void UsageFault_Handler(void)
{
  /* Go to infinite loop when Usage Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles SVCall exception.
  * @param  None
  * @retval None
  */
void SVC_Handler(void)
{
}

/**
  * @brief  This function handles Debug Monitor exception.
  * @param  None
  * @retval None
  */
void DebugMon_Handler(void)
{
}

/**
  * @brief  This function handles PendSVC exception.
  * @param  None
  * @retval None
  */
void PendSV_Handler(void)
{
}

/**
  * @brief  This function handles SysTick Handler.
  * @param  None
  * @retval None
  */
void SysTick_Handler(void)
{
  TimingDelay--;
}

/******************************************************************************/
/*                 STM32F4xx Peripherals Interrupt Handlers                   */
/*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
/*  available peripheral interrupt handler's name please refer to the startup */
/*  file (startup_stm32f4xx.s).                                               */
/******************************************************************************/

/**
  * @brief  This function handles PPP interrupt request.
  * @param  None
  * @retval None
  */
/*void PPP_IRQHandler(void)
{
}*/

/**
  * @brief  This function handles External line O interrupt request.
  * @param  None
  * @retval None
  */
void EXTI0_IRQHandler(void)
{
  if (EXTI_GetITStatus(USER_BUTTON_EXTI_LINE) != RESET)
  {
    /* Clear the Key Button EXTI Line Pending Bit */
    EXTI_ClearITPendingBit(USER_BUTTON_EXTI_LINE);
    
    /* As the following address is invalid (not mapped), a Hardfault exception
    will be generated with an infinite loop and when the IWDG counter reaches 0
    the IWDG reset occurs */
    *(__IO uint32_t *) 0xA0001000 = 0xFF;
  }
}

/**
  * @brief  This function handles TIM5 global interrupt request.
  * @param  None
  * @retval None
  */
void TIM5_IRQHandler(void)
{
  if (TIM_GetITStatus(TIM5, TIM_IT_CC4) != RESET)
  {    
    /* Get the Input Capture value */
    tmpCC4[CaptureNumber++] = TIM_GetCapture4(TIM5);
    
    /* Clear CC4 Interrupt pending bit */
    TIM_ClearITPendingBit(TIM5, TIM_IT_CC4);
    
    if (CaptureNumber >= 2)
    {
      /* Compute the period length */
      PeriodValue = (uint16_t)(0xFFFF - tmpCC4[0] + tmpCC4[1] + 1);
    }
  }
}

/**
  * @}
  */ 

/**
  * @}
  */ 

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/