香主：STM32外部中断EXTI调试失败

只看该作者 · 2010-10-19 11:57

使用万利开发板进行EXTI简单调试：设置PD3,PD4引脚作为中断输入端口，他们分别与板载按键KEY2,KEY3相连。设置好后主程序运行正常，可一旦按下KEY2或KEY3任何一个产生中断信号时，主程序死掉，中断也进不去！！

附EXTI设置源码：
**********************************************
主函数
***************
int main(void)
{

#ifdef DEBUG
  debug();
#endif
RCC_Configuration();    /* System Clocks Configuration */
GPIO_Configuration();    /* Configure the GPIO ports */
EXTI_Config();
NVIC_Configuration();    /* NVIC configuration */

while (1)
{..............}
****************************************************
GPIO端口设置
**************
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}
*************************************************
NVIC设置
*************
void NVIC_Configuration(void)
{
#ifdef  VECT_TAB_RAM
  /* Set the Vector Table base location at 0x20000000 */
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
  /* Set the Vector Table base location at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif

  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQChannel; //通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQChannel; //通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
***************************************************
EXTI设置
*************
void EXTI_Config(void)
{
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource3);
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource4);
  EXTI_ClearITPendingBit(EXTI_Line3);
  EXTI_ClearITPendingBit(EXTI_Line4);
  EXTI_InitStructure.EXTI_Line = EXTI_Line3|EXTI_Line4;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
  EXTI_GenerateSWInterrupt(EXTI_Line3);
  EXTI_GenerateSWInterrupt(EXTI_Line4);

}
*****************************************************
调了两天了就是不行啊！！请香主，各大虾赐教！