STM8L151C8T6 外部GPIO中断无法进入

1万 · 2021-10-8 09:30

STM8L151C8T6 单片机，设置PA7为外部中断输入。无法触发中断。
#define Water_detect_Port             GPIOA
#define Water_detect_Pin                GPIO_Pin_7

      GPIO_Init(Water_detect_Port,Water_detect_Pin,GPIO_Mode_In_FL_No_IT );
      EXti_SetPinSensitivity(EXTI_Pin_7,EXTI_trigger_Falling);
      EXTI_ClearITPendingBit(EXTI_IT_Pin7);

INTERRUPT_HANDLER(EXTI7_IRQHandler, 15)
{
/* In order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction.
*/

if(GPIO_ReadInputDataBit(Water_detect_Port,Water_detect_Pin)==RESET)
         {
            if((water_alarm!=module_water_data.status)&&(module_water_data.water_enable_status!=DISABLE))
                     {
                     printf("水浸报警触发\r\n");
                     module_water_data.cmd=water_alarm;                                              //如果当前未执行报警程序，且PA7检测到被拉低，则开始报警

            }
            GPIO_Init(Water_detect_Port,Water_detect_Pin,GPIO_Mode_In_FL_No_IT );
      }
      EXTI_ClearITPendingBit(EXTI_IT_Pin7);

}

设置后无法进入EXTI7中断内。
      asm("sim"); //关总中断
      halInit();
      asm("rim"); //开总中断

在初始货前关总中断，初始化后开总中断，无效。
请问还有哪些方面需要考虑？
EXTI7