Issue using HAL UART Transmit

Posted on November 12, 2017 at 09:25

Hello

I am having issues with the following HAL function when trying to transmit data using HAL library:

if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

It always return HAL_TIMEOUT.

I am setting serial port with:

/* USART3 init function */

static void MX_USART3_UART_Init(void)

{

  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;

  if (HAL_UART_Init(&huart3) != HAL_OK)

  {

    _Error_Handler(__FILE__, __LINE__);

  }

}

and then transmitting data with:

      if(HAL_UART_Transmit(&huart3, (uint8_t*)aTxBuffer, TXBUFFERSIZE, 5000)!= HAL_OK)

          {

            Error_Handler();

          }

#uart