stm32l071rbt6单片机usart2通讯 通过单片机usart2向电脑发送数据程序 不知道哪不对发送不了 各路大神路过搂一眼 救命啊

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#include "main.h"
#include "dayinj.h"

void SystemClock_Config(void);
static void MX_GPIO_Init(void);


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

  HAL_Init();  
  SystemClock_Config();
  MX_GPIO_Init();
//  MX_TIM6_Init();
        MX_USART2_UART_Init();
        //HAL_UART_Receive_IT(&huart1,RxBuffer,16);
        uint8_t TxBuffer[1]={"a"};       
  while (1)
  {
                HAL_Delay(50);
                //HAL_UART_Transmit_IT(&huart2, TxBuffer, sizeof(TxBuffer));
                HAL_UART_Transmit(&huart2,TxBuffer,1,0xffff);
                HAL_Delay(50);               
  }
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  __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_5;
  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 GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();
        __HAL_RCC_USART2_CLK_ENABLE();
        __HAL_RCC_USART1_CLK_ENABLE();
        __HAL_RCC_GPIOB_CLK_ENABLE();

    /**USART1 GPIO Configuration   
    PA9     ------> USART1_TX
    PA10     ------> USART1_RX
    */GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF4_USART1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
          
    GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF0_USART2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
                GPIO_InitStruct.Pin = GPIO_PIN_15;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
               




    //HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
    //HAL_NVIC_EnableIRQ(USART2_IRQn);

}

/* 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 */
}


#include "main.h"
#include "dayinj.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

UART_HandleTypeDef huart2;

/* USART1 init function */

void MX_USART2_UART_Init(void)
{

  huart2.Instance = USART2;
  huart2.Init.BaudRate =115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
        HAL_UART_DeInit(&huart2);
        HAL_UART_Init(&huart2);
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
        __HAL_UART_ENABLE_IT(&huart2, UART_IT_IDLE);



    /**USART2 GPIO Configuration   
    PA2     ------> USART2_TX
    PA3     ------> USART2_RX
    */


    /* USART2 DMA DeInit */



}


void USART2_IRQHandler(void)
{

        HAL_UART_IRQHandler(&huart2);



//         }
}

正点原子

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阿侑kevin

HAL_UART_DeInit(&huart2);         HAL_UART_Init(&huart2);你把HAL_UART_DeInit(&huart2);放在函数开始试试