stm32f407的外部中断出现问题 请教高手们解答

xiweili

stm32f407 外部中断函数总是被执行是怎么回事下面程序中总是输出 5 ，有知道的请帮回答下呗  （谢谢）废话不多说上源码：
//初始化函数
//初始化 EXTILine6
void EXTILine6_init(void)
{
  EXTI_InitTypeDef   EXTI_InitStructure;
  GPIO_InitTypeDef   GPIO_InitStructure;
  NVIC_InitTypeDef   NVIC_InitStructure;

  /* Enable GPIOB clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
  /* Enable SYSCFG clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
 
  /* Configure PB6 pin as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Connect EXTI Line6 to PA6 pin */
  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource6);

  /* Configure EXTI Line6 */
  EXTI_InitStructure.EXTI_Line = EXTI_Line6;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; 
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI Line6 Interrupt to the lowest priority */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0f;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0f;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

//初始化 EXTILine7
void EXTILine7_init(void)

  {
   EXTI_InitTypeDef   EXTI_InitStructure;
  GPIO_InitTypeDef   GPIO_InitStructure;
  NVIC_InitTypeDef   NVIC_InitStructure;

  /* Enable GPIOB clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
  /* Enable SYSCFG clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
 
  /* Configure PB7 pin as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Connect EXTI Line7 to Pb7 pin */
  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource7);

  /* Configure EXTI Line0 */
  EXTI_InitStructure.EXTI_Line = EXTI_Line7;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; 
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI Line7 Interrupt to the lowest priority */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0f;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0f;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  }

//中断函数

void EXTI9_5_IRQHandler(void)
{
 u32 i = 0;

 if(EXTI_GetITStatus(EXTI_Line7) != RESET)    //检查指定的EXTI7线路触发请求发生与否
 {
  SerialPutChar(0xf);   
  if(GPIOB->IDR & (1<< 7))
  { //上升沿->高电平->有效场同步信号
   EXTI->IMR |= EXTI_Line6;    //使能像素同步中断
   EXTI->EMR |= EXTI_Line6; 
   VsyncActive = 1;
  }
  else
  { //下降沿->场同步信号结束
   
   EXTI->IMR &= ~EXTI_Line6;    //关闭像素同步中断
   EXTI->EMR &= ~EXTI_Line6; 

   if(VsyncActive == 1)
   { //已经经历了一个完整的场同步阶段
    VsyncActive = 2;
   
    EXTI->IMR &= ~EXTI_Line7;    //关闭场同步中断
    EXTI->EMR &= ~EXTI_Line7; 
   }
   else
   {
        //   SerialPutChar('e');
     VsyncActive = 0;
   }
  }
  EXTI_ClearITPendingBit(EXTI_Line7);    //清除EXTI0线路挂起位 
  EXTI_ClearFlag(EXTI_Line7); 
 }                               //   7 6 5 4  3 2 1 0
  if(EXTI_GetITStatus(EXTI_Line6) != RESET)       
 {
    
   //  JpegBuffer[JpegDataCnt++] = (u8)(((GPIOC->IDR & 0xc0) >> 6) | ((GPIOE->IDR & 0x03) << 2)
 //                          | (GPIOE->IDR & 0x10) | ((GPIOB->IDR & 0x40)>>1)|((GPIOE->IDR & 0x60)<<1)); //存储数据
  SerialPutChar(0xff);
  EXTI_ClearITPendingBit(EXTI_Line6);     //清除EXTI0线路挂起位
  EXTI_ClearFlag(EXTI_Line6);
 }
  if(EXTI_GetITStatus(EXTI_Line5) != RESET)
 {
     EXTI_ClearITPendingBit(EXTI_Line5);
     SerialPutChar(0x02);
 }
  if(EXTI_GetITStatus(EXTI_Line8) != RESET)
 {
     EXTI_ClearITPendingBit(EXTI_Line8);
     SerialPutChar(0x03);
 }
  if(EXTI_GetITStatus(EXTI_Line9) != RESET)
 {
     EXTI_ClearITPendingBit(EXTI_Line9);
     SerialPutChar(0x04);
 }
 
     SerialPutChar(0x05);
 
}

xiweili

回复【楼主位】xiweili:
---------------------------------没人解答吗？   自己顶

正点原子

回复【楼主位】xiweili:
---------------------------------
说明有未知中断发生，你清除所有标记试试

xiweili

回复【3楼】正点原子:
---------------------------------
 EXTI9_5_IRQHandler（）中断函数应该是外部中断5 到 9 的中断处理函数， 我现在中断处理函数中获取每个触发中断的标志位并判断了该函数所有有可能的触发位，没有发现是外部中断5到9触发该函数   我不太清楚是谁触发了这个中断处理函数，只要一开外部5到9的中断，它就会一直输出5

各位有熟悉stm32f407 的看看我的中断配置这一块是不是有问题呀？ 

xiweili

回复【4楼】xiweili:
---------------------------------
问题已解决 没有清中断

JIMK

xiweili 发表于 2012-11-9 19:33
回复【4楼】xiweili:
---------------------------------
问题已解决&nbsp;没有清中断

楼主我也碰到了你一样的问题，请问你是如何解决的？