how to wake from standby mode using RTC 1 min alarm for stm32f030k6t6
I got up to stand by code with external wakeup pin interrupt but i dont know how to wake from RTC 1 mins alarm wake up pls any one can help on this
my sample code is
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
if(((PWR->CSR)&(PWR_CSR_SBF)))
{
PWR->CR |= PWR_CR_CWUF;
PWR->CR |= PWR_CR_CSBF;
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5,GPIO_PIN_SET);
HAL_Delay(10000);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5,GPIO_PIN_RESET);
HAL_Delay(10000);
}
while(1)
{
//gotosleep();
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_SET);
HAL_Delay(20000);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_RESET);
HAL_Delay(20000);
gotosleep();
}
}
void gotosleep()
{
//enable the PWR control cloCk
RCC->APB1ENR |= (RCC_APB1ENR_PWREN);
//Set SleepDeep bit of cortex sys control register//
SCB->SCR |=SCB_SCR_SLEEPDEEP_Msk;
//select standby mode//
PWR->CR |= PWR_CR_PDDS;
//CLEAR WEAKUP FLAG//
PWR->CR |= PWR_CR_CWUF;
//ENABLE WEAKUP PIN//
PWR->CSR |= (PWR_CSR_EWUP1);
//REQUEST WAIT FOR INTERRUPT//
__WFI();
}
__WFI is need to configure __WFE after that i donot know i am confusing so much how to wake using 1 min RTC alarm
