[mw_shl_code=c,true]void init_int_port() { EXTI_InitTypeDef EXTI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE); /* Configure PE.11 pin as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOE, &GPIO_InitStructure); /* Enable AFIO clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); /* Connect EXTI11 Line to PE.11 pin */ GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource11); /* Configure EXTI11 line */ EXTI_InitStructure.EXTI_Line = EXTI_Line11; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); /* Enable and set EXTI15_10 Interrupt to the lowest priority */ NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); }[/mw_shl_code] 这代码 改成M4的程序...   小白不懂，求指教~~~~~