外部中断~~~~~~~无语中11

苹果 · 发表于 2012-12-17 11:52:47

我想利用两个外部按键，一个led，下降沿触发，一个按键按下，led=1.另外一个按下=0

上传下附件，麻烦那位帮忙解答下

苹果 · 发表于 2012-12-17 11:56:12

void EXTI3_IRQHandler(void)
{
delay_ms(10);//消抖
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_3)==0) //按键KEY1
{
  GPIO_SetBits(GPIOA,GPIO_Pin_8);
//LED1=!LED1;

}
EXTI_ClearITPendingBit(EXTI_Line3);  //清除LINE3上的中断标志位
}

void EXTI4_IRQHandler(void)
{
delay_ms(10);//消抖
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_4)==0) //按键KEY0
{
   GPIO_ResetBits(GPIOA,GPIO_Pin_8);
}
EXTI_ClearITPendingBit(EXTI_Line4);  //清除LINE4上的中断标志位
}

这个是配置函数

EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

   GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //使能复用功能时钟

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//使能PORTA,PORTE时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //GPIO_Mode_Out_PP推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO
//初始化KEY0-->GPIOB.3,KEY1-->GPIOB.4
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//使能PORTB,PORTE时钟

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_3|GPIO_Pin_4;//PB3~4
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //设置成上拉输入
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB3,4
  //GPIOB.3 中断线以及中断初始化配置   下降沿触发
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource3);

   EXTI_InitStructure.EXTI_Line=EXTI_Line3; //KEY2
   EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//下降沿触发
   EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOB.3   中断线以及中断初始化配置下降沿触发 //KEY1
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource4);
   EXTI_InitStructure.EXTI_Line=EXTI_Line4;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure);    //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOE.4   中断线以及中断初始化配置  下降沿触发 //KEY0
//   GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource4);
//   EXTI_InitStructure.EXTI_Line=EXTI_Line4;
//   EXTI_Init(&EXTI_InitStructure);    //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

  //GPIOA.0   中断线以及中断初始化配置上升沿触发

A0  WK_UP
// GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);
//
// EXTI_InitStructure.EXTI_Line=EXTI_Line0;
//   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
//   EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

   NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn; //使能按键WK_UP所在的外部中断通道
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; //抢占优先级2，
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02; //子优先级3
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
   NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn; //使能按键KEY2所在的外部中断通道
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; //抢占优先级2，
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03; //子优先级2
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
   NVIC_Init(&NVIC_InitStructure);

//   NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn; //使能按键KEY1所在的外部中断通道
//   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
//   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01; //子优先级1
//   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
//   NVIC_Init(&NVIC_InitStructure);     //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
//
// NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn; //使能按键KEY0所在的外部中断通道
//   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
//   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00; //子优先级0
//   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
//   NVIC_Init(&NVIC_InitStructure);     //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

正点原子 · 发表于 2012-12-17 12:04:53

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_3|GPIO_Pin_4;//PB3~4
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //设置成上拉输入
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB3,4
  //GPIOB.3 中断线以及中断初始化配置   下降沿触发
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource3);
改为
GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_3|GPIO_Pin_4;//PB3~4
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置成上拉输入
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB3,4
  //GPIOB.3 中断线以及中断初始化配置   下降沿触发
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource3);