AWU的應(yīng)用（用庫(kù)函數(shù)完成的）

//切記要開(kāi)啟中斷　且在中斷函數(shù)中 AWU_GetFlagStatus();　來(lái)清除中斷

void AWU_SET(void)

{

CLK_PeripheralClockConfig(CLK_PERIPHERAL_AWU, ENABLE);

AWU_Init(AWU_TIMEBASE_12S);

}

#ifdef _COSMIC_

@far @interrupt void AWU_IRQHandler(void)

#else

void AWU_IRQHandler(void) interrupt 1

#endif

{

AWU_GetFlagStatus();

}

IWDG應(yīng)用（直接操作寄存器完成的）　

在需要清狗的地方調(diào)用WDT_CLR()即可

void WDT_CLR(void )

{

IWDG->KR = IWDG_KEY_REFRESH;

}

void START_WDT(void )

{

IWDG->KR =0X55;//打開(kāi)保護(hù)

IWDG->PR = IWDG_Prescaler_256;//　28Khz 256分頻　

IWDG->RLR = 254;//重載寄存器設(shè)定　每當(dāng)喂狗時(shí)　此值就會(huì)重載

IWDG->KR = IWDG_KEY_REFRESH;//先喂一次

IWDG->KR = IWDG_KEY_ENABLE;//啟動(dòng)看門(mén)狗

}

WWDG應(yīng)用

WWDG-CR是向下的計(jì)數(shù)器，數(shù)到0x40就會(huì)復(fù)位，窗口的上限可以任你設(shè)，最大7F，如果設(shè)成7F，幾乎就成了沒(méi)有窗口的看門(mén)狗了?！?/p>

窗口的意思是假如你設(shè)是0x60,那么只有在0X60-0X40間可以喂狗，其它時(shí)間喂，狗就會(huì)復(fù)位你的單片機(jī)，所以喂狗前要先判斷狗餓否。

typedef unsigned char uint8_t;

void WWDG_Init(uint8_t Counter, uint8_t WindowValue)

{

//assert_param(IS_WWDG_WINDOWLIMITVALUE_OK(WindowValue));

WWDG->WR = WWDG_WR_RESET_VALUE;

WWDG->CR = (uint8_t)((uint8_t)(WWDG_CR_WDGA | WWDG_CR_T6) | (uint8_t)Counter);

WWDG->WR = (uint8_t)((uint8_t)(~WWDG_CR_WDGA) & (uint8_t)(WWDG_CR_T6 | WindowValue));

}

#define BIT_MASK ((uint8_t)0x7F)

void WWDG_SetCounter(uint8_t Counter)

{

WWDG->CR = (uint8_t)(Counter & (uint8_t)BIT_MASK);

}

#define window_max 0x60

#define wwdg_reset 0x70

void WWDG_CLR(void)

{//狗餓否

if ((WWDG->CR)&0x7f)< window_max)WWDG_SetCounter(wwdg_reset) ;

}

main()

{

WWDG_Init(wwdg_reset,window_max );

while(1)

{

WWDG_CLR

}

}