STM8L探索套件学习笔记-EXTI外部中断（二）

首先我们把KEY的GPIO设置为输入中断使能

GPIO_Init(KEY_PORT,KEY_PIN,GPIO_Mode_In_FL_IT);

然后配置中断1为下降沿低电平触发

EXTI_SetPinSensitivity(EXTI_Pin_1, EXTI_Trigger_Falling_Low);

设置中断的优先级

ITC_SetSoftwarePriority(EXTI1_IRQn, ITC_PriorityLevel_1);

开全局中断

enableInterrupts();

最后我们到中断文件里面STM8L15X_it.c设置

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);

}