本帖最后由 ljmf5 于 2017-4-6 18:34 编辑
楼主能否把代码贴出来看看，我的外部中断进入不了
代码如下：
-
- void EXTI7_config(void)
- {
- GPIO_InitPara GPIO_InitStructure;
- EXTI_InitPara EXTI_InitStructure;
- NVIC_InitPara NVIC_InitStructure;
- /* Enable the KEY Clock */
- RCC_AHBPeriphClock_Enable(RCC_AHBPERIPH_GPIOA, ENABLE);
- RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_CFG, ENABLE);
- // GPIO_PinAFConfig(GPIOA, GPIO_PINSOURCE7, GPIO_AF_8);
- /* Configure Button pin as input */
- GPIO_InitStructure.GPIO_Mode = GPIO_MODE_IN;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PUPD_NOPULL;
- GPIO_InitStructure.GPIO_Pin = GPIO_PIN_7;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- /* Enable and set key EXTI Interrupt to the lowest priority */
- NVIC_InitStructure.NVIC_IRQ = EXTI4_15_IRQn;
- NVIC_InitStructure.NVIC_IRQPreemptPriority = 2;
- NVIC_InitStructure.NVIC_IRQSubPriority = 0;
- NVIC_InitStructure.NVIC_IRQEnable = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
- /* Connect key EXTI Line to key GPIO Pin */
- SYSCFG_EXTILine_Config(EXTI_SOURCE_GPIOA, EXTI_SOURCE_PIN7);
- /* Configure key EXTI line */
- EXTI_InitStructure.EXTI_LINE = EXTI_LINE7;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
- EXTI_InitStructure.EXTI_LINEEnable = ENABLE;
- EXTI_Init(&EXTI_InitStructure);
- EXTI_ClearIntBitState(EXTI_LINE7);
- }
- static unsigned int i;
- void EXTI4_15_IRQHandler(void)
- {
- if(EXTI_GetIntBitState(EXTI_LINE7) != RESET)
- {
- printf("i=%d\r\n", i++);
- EXTI_ClearIntBitState(EXTI_LINE7);
- }
- }
| 
楼主
