上位机测试验证

上位机我们写好了，接下来编写下位机代码来测试一下。我们点击上位机的点灯、灭灯按钮，则会通过串口分别发送ON\n、OFF\n，我们编写下位机代码进行接收，然后操控LED灯即可。下位机是小熊派IOT开发板，测试代码如：

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_DMA_Init();

  MX_USART1_UART_Init();

  /* USER CODE BEGIN 2 */

  printf("Welcome to UART1 test!\r\n");

  /* USER CODE END 2 */

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */ 

  if(HAL_UART_Receive(&huart1, &Rdata, 1, 0)==HAL_OK)

  {

      if (usart_rx_buf_index > USART1_RX_BUF_LEN - 1)

      {

        usart_rx_buf_index = 0;

      }

      if (Rdata == 0x0A)

      {

        if (strcmp((char*)USART1_RX_BUF, "ON") == 0)

        {

          HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_SET);

        }

        else if (strcmp((char*)USART1_RX_BUF, "OFF") == 0)

        {

          HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_RESET);

        }

        usart_rx_buf_index = 0;

        memset(USART1_RX_BUF, 0, USART1_RX_BUF_LEN);

      }

      else

      {

        USART1_RX_BUF[usart_rx_buf_index++] = Rdata;

      }

  }

  }

  /* USER CODE END 3 */

}