鄙人调试F429的UART4时遇到的问题，可以发送数据，但是不能接收数据，进不了接收中断，图片是调试时寄存器截图，希望知情的大大指点一二，剁碎！ 代码如下：
[mw_shl_code=c,true]void Uart4_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); GPIO_PinAFConfig(GPIOA, GPIO_PinSource0,GPIO_AF_UART4); GPIO_PinAFConfig(GPIOA, GPIO_PinSource1,GPIO_AF_UART4); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_Init(GPIOA, &GPIO_InitStructure);//PA8??????·? USART_InitStructure.USART_BaudRate = 115200;//?¨?????è?? USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(UART4, &USART_InitStructure); USART_ITConfig(UART4, USART_IT_RXNE, ENABLE); USART_Cmd(UART4, ENABLE); USART_ClearFlag(UART4, USART_FLAG_RXNE); } void Nvic_Init(void) { NVIC_InitTypeDef NVIC_InitStructure;[/mw_shl_code] [mw_shl_code=c,true] /* ??????????????????·??? */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); /*1--?®?????????í*/ NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;//52; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;[/mw_shl_code] [mw_shl_code=c,true] NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); }[/mw_shl_code]