【STM32H745I-DISCO试用】串口配置

只看该作者 · 2025-3-8 17:38

本帖最后由南来之风于 2025-3-8 17:19 编辑

STLINK的VCP连接到板卡的PB10与PB11

原理图：

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进入CubeMx配置USART3

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static void MX_USART3_UART_Init(void)

{



  /* USER CODE BEGIN USART3_Init 0 */



  /* USER CODE END USART3_Init 0 */



  /* USER CODE BEGIN USART3_Init 1 */



  /* USER CODE END USART3_Init 1 */

  huart3.Instance = USART3;

  huart3.Init.BaudRate = 115200;

  huart3.Init.WordLength = UART_WORDLENGTH_8B;

  huart3.Init.StopBits = UART_STOPBITS_1;

  huart3.Init.Parity = UART_PARITY_NONE;

  huart3.Init.Mode = UART_MODE_TX_RX;

  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;

  huart3.Init.OverSampling = UART_OVERSAMPLING_16;

  huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;

  huart3.Init.ClockPrescaler = UART_PRESCALER_DIV1;

  huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;

  if (HAL_UART_Init(&huart3) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetTxFifoThreshold(&huart3, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetRxFifoThreshold(&huart3, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_DisableFifoMode(&huart3) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN USART3_Init 2 */



  /* USER CODE END USART3_Init 2 */



}

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unsigned char String2Uart[100]={0};

复制

  while (1)

  {

          static uint32_t cnt;

          sprintf(String2Uart, "\r\rInCore Cortex-M4  %d Ms", cnt++);

          HAL_UART_Transmit(&huart3, String2Uart, sizeof(String2Uart), 0xffffffff);

          HAL_GPIO_TogglePin(LD1_GPIO_Port, LD1_Pin);

          HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);

          HAL_Delay(1000);

    /* USER CODE END WHILE */



    /* USER CODE BEGIN 3 */

  }