//選擇 IWDG_Prescaler_128
//64/128 =0.5 khz 2ms周期

#define  IWDG_500MS_REST  (uint8)250#define  IWDG_400MS_REST  (uint8)200#define  IWDG_300MS_REST  (uint8)150#define  IWDG_250MS_REST  (uint8)125#define  IWDG_200MS_REST  (uint8)100#define  IWDG_100MS_REST  (uint8)50#define  IWDG_50MS_REST   (uint8)25#define  IWDG_4MS_REST    (uint8)2IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);//同意操作獨(dú)立看門狗IWDG_SetPrescaler(IWDG_Prescaler_128);//看門狗預(yù)分頻IWDG_SetReload(IWDG_200MS_REST);//設(shè)置看門狗復(fù)位時(shí)間IWDG_Enable();//啟動(dòng)獨(dú)立看門狗IWDG_ReloadCounter();//看門狗復(fù)位 正常使用時(shí)不想發(fā)生看門狗復(fù)位，就運(yùn)行此指令