STM32中断唤醒

只看该作者 · 2021-7-6 11:25

我是想利用中断去唤醒MCU，不是wakeup事件；
是利用PC13与PA0的外部中断去唤醒；
现在的问题是；PC13无法触发外部中断；
由于PC13的默认功能不是GPIO
我首先将PC13配置为GPIO模式

然后就开始配置了；但是现在一直不能进中断；我用的是SMT32F030C8T6
下面是我的代码

USART_InitTypeDef  USART_InitStructure;
GPIO_InitTypeDef  GPIO_InitStructure;
EXti_InitTypeDef  EXTI_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHBPeriphclockCmd(RCC_AHBPeriph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB,ENABLE);

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC,ENABLE);

/* Configure pins as AF pushpull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA,&GPIO_InitStructure);    //FP_EN

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;  //PWR_EN
GPIO_Init(GPIOB,&GPIO_InitStructure);

//FP 中断配置 PC13
RTC->TAFCR &= 0xFFF7FFFF; //PC13 作为GPIO用

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC,&GPIO_InitStructure);

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_trigger = EXTI_Trigger_Rising; //上升沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;

SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC,EXTI_PinSource13);//PC13 中断线映射
EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI4_15_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

USART_InitStructure.USART_BaudRate = 115200;//串口波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式.

  USART_Init(USART1, &USART_InitStructure); //初始化串口
  USART_Cmd(USART1, ENABLE);                   //使能串口

下面是中断服务函数

void EXTI4_15_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line13)!=RESET)
{
  //FP_Verify();
  printf("\r\n FP Verify");
}
EXTI_ClearITPendingBit(EXTI_Line13);
}

我用GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_13); 是能够读到触发的电平的，所以外部信号确认是有的；
不知道哪位大师做过这个