PT32U301进入Standby后，使用RTC唤醒和WAKEUP PIN唤醒

James_Jiang

/*功能：
PT32U301进入STANDBY后，将被RTC以3秒为周期循环唤醒，也可被WAKEUP PIN的下降沿立即唤醒
*/

uLONG intrRTC=0,intrWAKEUP=0;
int main(void)
{
   /*............................时钟初始化（略）.........................................*/
  NVIC_EnableIRQ((IRQn_Type) WAKEUP_IRQn);
  NVIC_EnableIRQ((IRQn_Type) RTC_IRQn);  
  SysAPBClkEnable(gCLK_UART0 | gCLK_RTC);
  SysAHBClkEnable(gCLK_GPIOD | gCLK_GPIOC | gCLK_GPIOB | gCLK_GPIOA);  
  SysIntoDSleepAPBClkEnable(gCLK_RTC);  //Enable into sleep gate clock
  UartInit();
  TICKConfig();
  GPIOAfr(GPIOD,BIT10,AF8);         //Set PD10 as WAKEUP(AF8)

   if(pSYSCtrl->SC_BK_CTRL & 0x2) // WakeUp from standby detection
   {
    pSYSCtrl->SC_BK_CTRL = 1;      //Enable BackUp Register Setting
    pSYSCtrl->SC_BKSLP_CTRL|=((uLONG)1<<31); //Clear Wakeup Flag
    printf("Hi!! I am Wakeup!!\r\n");
   }
   else //Power On.Configure standby mode
   {
    pSYSCtrl->SC_BK_CTRL = 1;                      //Enable BackUp Register Setting
    pSYSCtrl->SC_BKSLP_CTRL  = (0<<30)|(1<<28)|(1<<27)|(1<<26) | (1<<25) | (0<<24) |(3);
    pSYSCtrl->SC_BKRTC_CTRL |= (0xFF<<16)|(0x7F<<8)|(2<<2) |(1<<1)| 1;     
    pSYSCtrl->SC_BKRTC_CTRL&= ~(1<<1);     // Clear Reset Request RTC Counter
   }

   pRTCCtrl->RTC_ALMEN  = (1<<1)|1;         //Enable RTC Alarm
   pRTCCtrl->RTC_IER = (1<<17)|(1<<9) | (1<<1) |(1);   
   //
  TICKWaitms(10,1);
   SCB->SCR = (1UL << 2);  //Into DeepSleep
   __WFI();     //Wait For Interrupt
  while(1);
}

//--------------
void WAKEUP_IRQHandler(void)//irq 31
{
pSYSCtrl->SC_BK_CTRL = 1;     //Enable Access Backup Register
pSYSCtrl->SC_BKSLP_CTRL =((uLONG)1<<31);  //Clear Wakeup Flag
intrWAKEUP =1;
}
//--------------
void RTC_IRQHandler(void) //irq 8
{
intrRTC = pRTCCtrl->RTC_RIS;
pRTCCtrl->RTC_ISC = intrRTC;
}