0

我是 STM32 的初学者,我有一个项目,需要从另一个设备(如 arduino)接收数据,现在我尝试从 UART 3 传输数据,并使用 UART 1 接收数据。但我无法获得任何数据。我将 TX uart 3 连接到 RX uart 1,将 TX uart 1 连接到 RX uart 3。

/* USER CODE BEGIN PV */
int i = 0;
char bufferReceive[6], bufferTransmit[10];

/* USER CODE END PV */

/* USER CODE BEGIN 0 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if (huart->Instance == USART1)  //current UART
        {
        HAL_UART_Receive_IT(&huart1, (uint8_t*)bufferReceive, 1);   //activate UART receive interrupt every time
        }
}

/* USER CODE END 0 */

int main(void)
{
 HAL_UART_Receive_IT(&huart1, (uint8_t*)bufferReceive, 1);
 while (1)
  {
    /* USER CODE END WHILE */`enter code here`


     sprintf(bufferTransmit,"%d\n",i);
      HAL_UART_Transmit(&huart3, (uint8_t*)bufferTransmit, sizeof(bufferTransmit), 1000);
                    HAL_Delay(500);

                    i++;

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}
4

2 回答 2

0

你不初始化任何东西。必须先设置外设、引脚、时钟等,然后才能工作。

于 2019-06-28T07:40:48.297 回答
0

首先,您的代码混乱且难以阅读。

其次,您之前缺少整个初始化区域,while(1)因此您的系统不应该做任何事情。

/* USER CODE BEGIN PV */
int i = 0;
char bufferReceive[6], bufferTransmit[10];
/* USER CODE END PV */

/* USER CODE BEGIN 0 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if (huart->Instance == USART1)
    {
        HAL_UART_Receive_IT(&huart1, (uint8_t*)bufferReceive, 1);
    }
}
/* USER CODE END 0 */

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_USART3_UART_Init();
    MX_USART1_UART_Init();
    /* USER CODE BEGIN 2 */
    HAL_UART_Receive_IT(&huart1, (uint8_t*)bufferReceive, 1);
    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    {
        sprintf(bufferTransmit,"%d\n",i);
        HAL_UART_Transmit(&huart3, (uint8_t*)bufferTransmit, sizeof(bufferTransmit), 1000);
        HAL_Delay(500);
        i++;
        /* USER CODE END WHILE */
        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}

您在 处收到一个字节HAL_UART_Receive_IT(&huart1, (uint8_t*)bufferReceive, 1);

哪个不等待它只是继续前进。

接下来,您发送bufferTransmit,然后导致 UART1 接收一个字节,并继续在同一内存位置一个接一个地接收所有字节。

您似乎没有i正确使用,因为您可能想要类似的东西HAL_UART_Receive_IT(&huart1, (uint8_t*)&bufferReceive[i], 1);

于 2019-06-27T17:54:19.127 回答