STM8S003F6独立看门狗的使用

//独立看门口的时钟来源 内部低速时钟 128khz 除以2 即64khz 
//选择 IWDG_Prescaler_128 
//64/256 =0.5 khz 2ms周期 

#define  IWDG_500MS_REST (unsigned char)250
#define  IWDG_400MS_REST (unsigned char)200
#define  IWDG_300MS_REST (unsigned char)150
#define  IWDG_250MS_REST (unsigned char)125
#define  IWDG_200MS_REST (unsigned char)100
#define  IWDG_100MS_REST (unsigned char)50
#define  IWDG_50MS_REST (unsigned char)25
#define  IWDG_4MS_REST (unsigned char)2
    IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);//enable write dog reg
  IWDG_SetPrescaler(IWDG_Prescaler_128);//看门狗预分频
  IWDG_SetReload(IWDG_200MS_REST);//设置看门狗复位时间
  IWDG_Enable();//启动独立看门狗
 IWDG_ReloadCounter();//看门狗复位 正常使用时不想发生看门狗复位，就执行