#include "includes.h"

void IWDG_Configuration(unsigned short invalue)
{
// WWDG 时钟使能
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_WWDG, ENABLE);  
	if(RCC_GetFlagStatus(RCC_FLAG_IWDGRST) != RESET)RCC_ClearFlag();  
//写入0x5555,用于允许狗狗寄存器写入功能
	IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
 
//狗狗时钟分频,40K/256=156HZ(6.4ms)
	IWDG_SetPrescaler(IWDG_Prescaler_256);
 
//喂狗时间 
	IWDG_SetReload(invalue);
	
//喂狗
	IWDG_ReloadCounter();
 
//使能狗狗
	IWDG_Enable();
	
}