stm32f0进入待机模式只能进去一次，第二次进不去，求大佬告知该如何配置PA0引脚

Lora · 发表于 2020-3-6 12:25:00

void Standby_Entering(void)
{

RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_WakeUpPinCmd(PWR_WakeUpPin_1,ENABLE);
PWR_ClearFlag(PWR_FLAG_WU);
PWR_ClearFlag(PWR_FLAG_SB);
PWR_EnterSTANDBYMode();
}

void Standby_Configure(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef  EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

GPIO_InitStructure.GPIO_Pin  =  GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode =  GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOA, &GPIO_InitStructure);

   SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}

//中断处理(注：唤醒之后相当于复位，不会执行中断函数里的内容)
void EXTI0_IRQHandler(void)
{
EXTI_ClearITPendingBit(EXTI_Line0); //清除LINE0上的中断标志位
}

int main(void)
{
USART2_Config(115200);//串口二初始化
delay_init();///定时器初始化，
led_init();///LED灯初始代，
Standby_Configure();
//  NB_POWER_INIT();
if(PWR_GetFlagStatus(PWR_FLAG_WU)==SET)//从待机唤醒后，除了电源控制/状态寄存器（PWR_CSR），所有寄存器被复位
{
Send_str("退出低功耗");
}
else
{
LED0=0;//是待机唤醒复位，可帮助调试
}
while (1)
   {


   if(USART_Get_Flag())
   {
Send_str("进入低功耗");
Standby_Entering();
   }

  }
}