【STM32H7S78-DK测评】-2- 串口输出

只看该作者 · 2024-9-7 21:29

本帖最后由南来之风于 2024-9-7 13:16 编辑

板载的STlink有虚拟串口通信的功能，连接到H7芯片的PD0与PD1引脚。

在上一次项目的基础上，打开图形化配置界面，配置UART功能。

在Connectivity一栏，找到UART4，然后在右侧配置参数。

默认的引脚不是PD0与PD1，手动更改一下即可。

点击保存，自动生成代码。

复制

static void MX_UART4_Init(void)

{



  /* USER CODE BEGIN UART4_Init 0 */



  /* USER CODE END UART4_Init 0 */



  /* USER CODE BEGIN UART4_Init 1 */



  /* USER CODE END UART4_Init 1 */

  huart4.Instance = UART4;

  huart4.Init.BaudRate = 115200;

  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;

  huart4.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;

  huart4.Init.ClockPrescaler = UART_PRESCALER_DIV1;

  huart4.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;

  if (HAL_UART_Init(&huart4) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetTxFifoThreshold(&huart4, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetRxFifoThreshold(&huart4, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_DisableFifoMode(&huart4) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN UART4_Init 2 */



  /* USER CODE END UART4_Init 2 */



}

接下来编写应用程序代码。首先定义好要输出的字符串：

复制

/* USER CODE BEGIN 0 */

uint8_t UartTestStr[] = "Hello 21ic, Hello STM32H7S78-DK!";

/* USER CODE END 0 */

主程序中直接调用HAL库的发送API接口：

复制

int main(void)

{



  /* USER CODE BEGIN 1 */



  /* USER CODE END 1 */



  /* MPU Configuration--------------------------------------------------------*/

  MPU_Config();



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



  /* Update SystemCoreClock variable according to RCC registers values. */

  SystemCoreClockUpdate();



  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

  HAL_Init();



  /* USER CODE BEGIN Init */



  /* USER CODE END Init */



  /* USER CODE BEGIN SysInit */



  /* USER CODE END SysInit */



  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  MX_UART4_Init();

  /* USER CODE BEGIN 2 */

  HAL_UART_Transmit(&huart4, "\r\nUART4 Init Done", sizeof("\r\nUART4 Init Done"), 0xffffffff);

  HAL_UART_Transmit(&huart4, UartTestStr, sizeof(UartTestStr), 0xffffffff);

  /* USER CODE END 2 */



  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    /* USER CODE END WHILE */



    /* USER CODE BEGIN 3 */

        HAL_UART_Transmit(&huart4, "\r\nLD1 GREEN TOGGLE", sizeof("\r\nLD1 GREEN TOGGLE"), 0xffffffff);

        HAL_GPIO_TogglePin(LD1_GPIO_PORT, LD1_PIN);

        /* Insert delay 100 ms */

        HAL_UART_Transmit(&huart4, "\r\nLD2 ORANGE TOGGLE", sizeof("\r\nLD2 ORANGE TOGGLE"), 0xffffffff);

        HAL_Delay(1000);

        HAL_GPIO_TogglePin(LD2_GPIO_PORT, LD2_PIN);

        /* Insert delay 100 ms */

        HAL_Delay(1000);

  }

  /* USER CODE END 3 */

}

打开串口工具TeraTerm，配置串口参数：

实物效果：