Uart5发送正常，接收中断无法进入

yunhongli

初始化代码如下，中断函数如下，发送正常，中断无法进入。

 void Uart5Init(u32 bound){
    //GPIO端口设置
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
//使能时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD, ENABLE);
    /* Configure UART5 Rx (PD2) as input floating                             */
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOD, &GPIO_InitStructure);
    /* Configure UART5 Tx (PC12) as alternate function push-pull                */
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
//波特率、字长、停止位、奇偶校验位、硬件流控制、异步串口为默认（被屏蔽字设置）
    USART_InitStructure.USART_BaudRate = bound;
    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(UART5, &USART_InitStructure);
    USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//开启中断
    USART_Cmd(UART5, ENABLE);                    //使能串口 
}

void UART5_IRQHandler(void)                 //串口5中断服务程序
{
    unsigned char recvData;


   if(USART_GetITStatus(UART5, USART_IT_TXE) != RESET)
    {
    USART_ClearITPendingBit(UART5, USART_IT_TXE); 
    }

    if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET)  //接收中断(接收到的数据必须是0x0d 0x0a结尾)
    {
    recvData =USART_ReceiveData(UART5);//(UART5->DR); //读取接收到的数据

    }
}

yunhongli

问题解决，谢谢。

//如果使能了接收中断
NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//接收中断使能,此步骤很重要!!!