STM32F030 看门狗DWOG应用

//==文件wdog.h============================================================#ifndef _WDOG_H_#define _WDOG_H_#define  VT_WDGT_WDG_64MS#defineT_WDG_4096MS   5120#defineT_WDG_1024MS   1280#defineT_WDG_256MS   320#defineT_WDG_128MS   160#defineT_WDG_64MS 80#defineT_WDG16MS 20//=================================================extern void Wdog_Init(void) ;#endif ////==文件wdog.c============================================================//#include "stm32f0xx.h"#include "global.h" #include "wdog.h"void Wdog_Init(void){  /* 检测系统是否由独立看门狗喂狗复位 */  if (RCC_GetFlagStatus(RCC_FLAG_IWDGRST) != RESET)  {     /* 清除复位标志位 */RCC_ClearFlag();  }  /* 使能写访问IWDG_PR and IWDG_RLR 寄存器 */  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);  /* IWDG计数器的时钟: LSI/32 */  IWDG_SetPrescaler(IWDG_Prescaler_32);  /* 设置重导计数器的值 获得250ms的IWDG超时可以按下面算式计算：       Counter Reload Value = 250ms/IWDG counter clock period                          = 250ms / (LSI/32)                          = 0.25s / (LsiFreq/32)                          = LsiFreq/(32 * 4)                          = LsiFreq/128   *///  IWDG_SetReload(LsiFreq/128);IWDG_SetReload(VT_WDG);  /* 从新导入IWDG计数器 */  IWDG_ReloadCounter();  /* 使能 IWDG (LSI 被硬件使能) */  IWDG_Enable();}