void Exti_Init(void) { EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource0); GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource1); EXTI_InitStructure.EXTI_Line = EXTI_Line0; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); // EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line = EXTI_Line1; //外部中断1 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); //外部中断0中断优先级 NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQChannel; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //外部中断1中断优先级 NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQChannel; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_Init(&NVIC_InitStructure); } void EXTI0_IRQHandler(void) { if(EXTI_GetITStatus(EXTI_Line0) != RESET) { EXTI_ClearITPendingBit(EXTI_Line0); //清外部中断0 LED1ON(); delay_s(); LED1OFF(); uart1_trx[uart1_rx] = 0x61; uart1_rx++; uart1_rx &= 0x3f; } } void EXTI1_IRQHandler(void) { if(EXTI_GetITStatus(EXTI_Line1) != RESET) { EXTI_ClearITPendingBit(EXTI_Line1);//清外部中断1 LED2ON(); delay_s(); LED2OFF(); uart1_trx[uart1_rx] = 0x62; uart1_rx++; uart1_rx &= 0x3f; } } 假如PE0,PE1配置为按键输入 PE0按下时产生的下降沿触发外中断0,那在释放会产生上升沿,会不会触发外中断1? PE1按下时产生的下降沿会触发外中断0吗?,那在释放会产生上升沿,会不会触发外中断1? 谁能说清楚点啊,谢谢啦,分数都是浮云,解决问题最重要! 望高手解决。外中断1搞错了 // EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line = EXTI_Line1; //外部中断1 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //上升沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); 其他不变。我要问的是这个,我搞错了,这又会是什么情况 PE0按下时产生的下降沿触发外中断0,那在释放会产生上升沿,会不会触发外中断1? PE1按下时产生的下降沿会触发外中断0吗?,那在释放会产生上升沿,会不会触发外中断1? |