新买了一块Nucleo F303k8，调试串口：
MDK 5.18 使用HAL库开发。下载了STM32CubeF3，里面有F303K8的串口例程。
根据串口的例程，自己写了一个，使用中断方式处理串口。
问题描述：
（1）字符串发送正常，用串口助手都能收到，会进入中断函数USARTx_IRQHandler；
（2）通过串口助手发送的字符没有任何反应，程序不进入中断函数USARTx_IRQHandler，也不会进入回调函数HAL_UART_RxCpltCallback
（3）怀疑过串口芯片的问题，但是用我自己焊的线路板和买的串口线路板都是一样的情况。
搞了两天了，求高手指点！
谢谢！


具体代码如下：
main.c 文件

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/** @addtogroup STM32F3xx_HAL_Examples
  * @{
  */

/** @addtogroup UART_TwoBoards_ComIT
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define TRANSMITTER_BOARD

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* UART handler declaration */
UART_HandleTypeDef UartHandle;
__IO ITStatus UartReady = RESET;

/* Buffer used for transmission */
uint8_t aTxBuffer[] = " ****UART_TwoBoards_ComIT****";
       
/* Buffer used for reception */
//uint8_t aRxBuffer[RXBUFFERSIZE]="";

uint8_t TxBuffer[100];//?????
uint8_t aRxBuffer[1];
uint8_t RxBuffer[100];

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void Error_Handler(void);
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);

int main(void)
{

  HAL_Init();

  /* Configure the system clock to 64 MHz */
  SystemClock_Config();

  /* Configure LED3 */
  BSP_LED_Init(LED3);

  UartHandle.Instance        = USARTx;//库文件中又宏定义的，USARTx=USART1

  UartHandle.Init.BaudRate   = 9600;
  UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
  UartHandle.Init.StopBits   = UART_STOPBITS_1;
  UartHandle.Init.Parity     = UART_PARITY_NONE;
  UartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
  UartHandle.Init.Mode       = UART_MODE_TX_RX;
  UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
  {
    Error_Handler();
  }  
  if(HAL_UART_Init(&UartHandle) != HAL_OK)
  {
    Error_Handler();
  }
        BSP_LED_Off(LED3);
        if(HAL_UART_Transmit_IT(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
  {
    Error_Handler();
  }
        while (UartReady != SET)
  {
  }
       
        UartReady = RESET;

if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)Error_Handler();
       
  while (1)
  {

  }
}

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow :
  *            System Clock source            = PLL (HSI)
  *            SYSCLK(Hz)                     = 64000000
  *            HCLK(Hz)                       = 64000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 2
  *            APB2 Prescaler                 = 1
  *            PLLMUL                         = RCC_PLL_MUL16 (16)
  *            Flash Latency(WS)              = 2
  * @param  None
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;

  /* HSI Oscillator already ON after system reset, activate PLL with HSI as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
  {
    /* Initialization Error */
    while(1);
  }

  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
     clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;  
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= HAL_OK)
  {
    /* Initialization Error */
    while(1);
  }
}
/**
  * @brief  Tx Transfer completed callback
  * @param  UartHandle: UART handle.
  * @note   This example shows a simple way to report end of IT Tx transfer, and
  *         you can add your own implementation.
  * @retval None
  */
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
{
  /* Set transmission flag: transfer complete */
        BSP_LED_On(LED3);            //测试进入了发送回调函数
        UartReady = SET;
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
{
        BSP_LED_Off(LED3);      //测试进入了接收回调函数
        RxBuffer[0]='u';              //测试，只要进入此回调函数，就发送“uvx”
        RxBuffer[1]='v';
        RxBuffer[2]='x';
        RxBuffer[4]=0;
        HAL_UART_Transmit(UartHandle,RxBuffer,3,1);
        UartReady = SET;
}

void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
{
    Error_Handler();
}

static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
  while (BufferLength--)
  {
    if ((*pBuffer1) != *pBuffer2)
    {
      return BufferLength;
    }
    pBuffer1++;
    pBuffer2++;
  }

  return 0;
}

static void Error_Handler(void)
{
  /* Turn LED3 on */
  BSP_LED_On(LED3);
  while(1)
  {
    /* Error if LED3 is slowly blinking (1 sec. period) */
    BSP_LED_Toggle(LED3);
    HAL_Delay(1000);
  }  
}

#ifdef  USE_FULL_ASSERT

void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

void USARTx_IRQHandler(void)    //中断函数
{
  HAL_UART_IRQHandler(&UartHandle);       
}

自己顶！