首先我們把KEY的GPIO設置為輸入中斷使能

GPIO_Init(KEY_PORT,KEY_PIN,GPIO_Mode_In_FL_IT);

然后配置中斷1為下降沿低電平觸發

EXTI_SetPinSensitivity(EXTI_Pin_1, EXTI_Trigger_Falling_Low);

設置中斷的優先級

ITC_SetSoftwarePriority(EXTI1_IRQn, ITC_PriorityLevel_1);

開全局中斷

enableInterrupts();

最后我們到中斷文件里面STM8L15X_it.c設置

INTERRUPT_HANDLER(EXTI1_IRQHandler, 9)

{

/* In order to detect unexpected events during development,

it is recommended to set a breakpoint on the following instruction.

*/

GPIO_ToggleBits(GPIOE, GPIO_Pin_7);

Delay(0xFFFF);

EXTI_ClearITPendingBit(EXTI_IT_Pin1);

}