串口一直不能进入接收中断，有没有大佬帮我看看

qq978878732

使用HAL库做的485通讯测试，不能进入中断，有没有人帮忙看一下，代码贴下面


/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart4;
UART_HandleTypeDef huart1;

unsigned char buf[128] = {0};
/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_UART4_Init(void);
static void MX_USART1_UART_Init(void);
void CXY_Rs485RxEN(void);
void CXY_Rs485TxEN(void);
void OpenCXY(void);
void CloseCXY(void);
void UART4_Send_Buf(const unsigned char* u8buf, const unsigned short u16len);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */


  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();       
  OpenCXY();
  unsigned char c;
  /* USER CODE BEGIN 2 */
  /* USER CODE END 2 */

                HAL_UART_Receive_IT(&huart4,(unsigned char *)c, 1);
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
          const unsigned char CYXCmd[8] = {0x01,0x03,0x00,0x00,0x00,0x02,0xC4,0x0B};       
    /* USER CODE END WHILE */
                int i = 0;
                for(i=0;i<8;i++)
                {
                       
                        printf("%x  ",CYXCmd[i]);
                }
                printf("\r\n");
                UART4_Send_Buf(CYXCmd,8);

                HAL_Delay(5000);
    for(i=0;i<10;i++)
                {
                        printf("%x  ",buf[i]);
                }
    printf("\r\n");
               
                printf("again\r\n");
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

void OpenCXY(void)
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    __HAL_RCC_GPIOC_CLK_ENABLE();

    GPIO_InitStructure.Pin =  GPIO_PIN_2 ;
    GPIO_InitStructure.Mode  = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
    GPIO_InitStructure.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
                       
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_2,GPIO_PIN_SET);//power on
               
    MX_UART4_Init();
                CXY_Rs485RxEN();
}

void CloseCXY(void)
{
                GPIO_InitTypeDef GPIO_InitStructure = {0};
    __HAL_RCC_GPIOC_CLK_ENABLE();
    //???????
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_2,GPIO_PIN_RESET);

    GPIO_InitStructure.Pin =  GPIO_PIN_11;
    GPIO_InitStructure.Mode  = GPIO_MODE_AF_PP;
    GPIO_InitStructure.Mode  = GPIO_MODE_INPUT;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_9,GPIO_PIN_RESET);

    GPIO_InitStructure.Pin =  GPIO_PIN_10;
    GPIO_InitStructure.Mode  = GPIO_MODE_AF_PP;
    GPIO_InitStructure.Mode  = GPIO_MODE_INPUT;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_10,GPIO_PIN_RESET);
}

void CXY_Rs485RxEN(void)
{
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_8,GPIO_PIN_RESET);//RX
}

void CXY_Rs485TxEN(void)
{
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_8,GPIO_PIN_SET);//TX
}

void UART4_Send_Buf(const unsigned char* u8buf, const unsigned short u16len)
{
          int i = 0;
    if(NULL == u8buf)
    {
                        return;
    }
    CXY_Rs485TxEN();
                HAL_UART_Transmit(&huart4,(uint8_t*)u8buf,u16len,0xFFFF);
    while(__HAL_UART_GET_FLAG(&huart4, USART_FLAG_TXE) == RESET)
    {
                        printf("----------1------------");
    }
    HAL_Delay(100);
    CXY_Rs485RxEN();
}
/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
  RCC_OscInitStruct.MSIState = RCC_MSI_ON;
  RCC_OscInitStruct.MSICalibrationValue = 0;
  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_3;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief UART4 Initialization Function
  * @param None
  * @retval None
  */
static void MX_UART4_Init(void)
{

  /* USER CODE BEGIN UART4_Init 0 */

  /* USER CODE END UART4_Init 0 */

  /* USER CODE BEGIN UART4_Init 1 */
        unsigned char c;
  /* USER CODE END UART4_Init 1 */
  huart4.Instance = UART4;
  huart4.Init.BaudRate = 9600;
  huart4.Init.WordLength = UART_WORDLENGTH_8B;
  huart4.Init.StopBits = UART_STOPBITS_1;
  huart4.Init.Parity = UART_PARITY_NONE;
  huart4.Init.Mode = UART_MODE_TX_RX;
  huart4.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart4.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart4) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN UART4_Init 2 */

       
        //__HAL_UART_ENABLE_IT(&huart4,UART_IT_RXNE);//??????
  /* USER CODE END UART4_Init 2 */

}

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 9600;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

int fputc(int ch, FILE *f)
{
          USART1->DR = (unsigned char)ch;
    while(__HAL_UART_GET_FLAG(&huart1,UART_FLAG_TXE)==RESET)
    {
    }
    return ch;
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
           printf("------------------------All-In---------------------------\r\n");
    if(huart == &huart4)
    {
                        static short i = 0;
                        printf("-------------------------------IN--------------------------\r\n");
                        unsigned char RxByte;
#if 1
                        if((__HAL_UART_GET_FLAG(&huart4,UART_FLAG_RXNE) != RESET) ||(__HAL_UART_GET_FLAG(&huart4,UART_FLAG_ORE) != RESET))
                        {
                                HAL_UART_Receive_IT(&huart4,&RxByte,1);
                                printf("output is %x\r\n",RxByte);
                                buf[i++] = RxByte;
                        }
                        else
                        {
                                printf("--------------------------ERR------------------------\r\n");
                        }
                        //__HAL_USART_CLEAR_FLAG(&huart4,UART_FLAG_RXNE);
                        //__HAL_USART_CLEAR_FLAG(&huart4,UART_FLAG_ORE);
#endif
    }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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