请大神们帮看看这程序，为什么进了外部中断执行完了中断里的代码后，它不回去执行主函数的代码，也没执行中断服务函数的代码!!谢谢

忠实粉丝 · 发表于 2015-5-25 20:41:04

[mw_shl_code=c,true]void Exti0_Init(void) { EXTI_InitTypeDef EXTI_InitStruct; NVIC_InitTypeDef NVIC_InitStruct; // GPIO_InitTypeDef GPIO_InitStruct; EXTI_DeInit(); // NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // delay_init(); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);//IO???±????????IO???????? GPIO_EXTILineConfig( GPIO_PortSourceGPIOB, GPIO_PinSource0);//????IO????????IO??????×???????????,????0 ////??????????/////// EXTI_InitStruct.EXTI_Line =EXTI_Line0; //????0->

A0 EXTI_InitStruct.EXTI_Mode =EXTI_Mode_Interrupt;//???????????? EXTI_InitStruct.EXTI_Trigger =EXTI_Trigger_Rising;//????????·? EXTI_InitStruct.EXTI_LineCmd =ENABLE ;//???? EXTI_Init (&EXTI_InitStruct); //////????????????????/////// NVIC_InitStruct.NVIC_IRQChannel=EXTI0_IRQn;//????°??ü?????????¨?? NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority =0;//??????????2 NVIC_InitStruct.NVIC_IRQChannelSubPriority =2;//×???????2 NVIC_InitStruct.NVIC_IRQChannelCmd =ENABLE ; NVIC_Init(&NVIC_InitStruct); } //主函数// int main(void) { uint16_t mv; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); delay_init(); uart_init(9600); Exti0_Init(); adc_init(); l5110_gpio_init(); L5110_BLC_H; l5110_init(); Key_zhongduan_Init(); display_l(); l5110_Printf_string(34,0,"0 ~ 3 v"); while(1) { printf ("ok"); delay_ms (500); } } void EXTI0_IRQHandler(void)//????????0·???????,????0??1??2??3??4??EXTI09_5_IRQHandler(void)??EXTI15_10_IRQHandler(void) { if(EXTI_GetITStatus(EXTI_Line0)!=RESET ) { delay_ms(10); if(KEY0==1) { printf ("z"); } EXTI_ClearITPendingBit(EXTI_Line0); //????LINE0????????±ê???? } }[/mw_shl_code]