Die HAL_UART_Transmit_DMA-Funktion sendet falsche Daten

Ich versuche, UART mit DMA zu verwenden,

Vor dem DMA habe ich die Polling-Methode mit while(HAL_UART_Transmit(&huart2, (uint8_t *)rs485TxBuffer, 17, 100) != HAL_OK);Funktion ausprobiert und konnte erfolgreich kommunizieren.

Wenn ich die verwende

while(HAL_UART_Transmit_DMA(&huart2, (uint8_t *)rs485TxBuffer, 17)!= HAL_OK);

Funktion, Daten werden nicht korrekt gesendet, nur das erste Byte ist korrekt, andere Bytes sind falsch. Warum ist das passiert? Wie kann ich dieses Problem lösen?

Dies ist meine Initialisierungssequenz:

  MX_DMA_Init();
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  MX_USART2_UART_Init();

Die folgenden Zeilen versuchen, Daten zu senden:

 while(1U)
  {

   // Communication Test Block //

    while(HAL_UART_Transmit_DMA(&huart2, (uint8_t *)rs485TxBuffer, 17)!= HAL_OK);
        // while(HAL_UART_Transmit(&huart2, (uint8_t *)rs485TxBuffer, 17, 100) != HAL_OK);

}

Dies sind die Initialisierungsfunktionen:

..
else if(huart->Instance==USART2)
      {
      /* USER CODE BEGIN USART2_MspInit 0 */
    
      /* USER CODE END USART2_MspInit 0 */
        /* Peripheral clock enable */
        __HAL_RCC_USART2_CLK_ENABLE();
    
        __HAL_RCC_GPIOD_CLK_ENABLE();
        /**USART2 GPIO Configuration
        PD5     ------> USART2_TX
        PD6     ------> USART2_RX
        */
        GPIO_InitStruct.Pin = USART2_RS485_TX_Pin|USART2_RS485_RX_Pin;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_PULLUP;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
        HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
    
        /* USART2 DMA Init */
        /* USART2_RX Init */
        hdma_usart2_rx.Instance = DMA1_Stream5;
        hdma_usart2_rx.Init.Channel = DMA_CHANNEL_4;
        hdma_usart2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
        hdma_usart2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
        hdma_usart2_rx.Init.MemInc = DMA_MINC_ENABLE;
        hdma_usart2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
        hdma_usart2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
        hdma_usart2_rx.Init.Mode = DMA_NORMAL;
        hdma_usart2_rx.Init.Priority = DMA_PRIORITY_MEDIUM;
        hdma_usart2_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
        if (HAL_DMA_Init(&hdma_usart2_rx) != HAL_OK)
        {
          Error_Handler();
        }
    
        __HAL_LINKDMA(huart,hdmarx,hdma_usart2_rx);
    
        /* USART2_TX Init */
        hdma_usart2_tx.Instance = DMA1_Stream6;
        hdma_usart2_tx.Init.Channel = DMA_CHANNEL_4;
        hdma_usart2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
        hdma_usart2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
        hdma_usart2_tx.Init.MemInc = DMA_MINC_ENABLE;
        hdma_usart2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
        hdma_usart2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
        hdma_usart2_tx.Init.Mode = DMA_NORMAL;
        hdma_usart2_tx.Init.Priority = DMA_PRIORITY_MEDIUM;
        hdma_usart2_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
        if (HAL_DMA_Init(&hdma_usart2_tx) != HAL_OK)
        {
          Error_Handler();
        }
    
        __HAL_LINKDMA(huart,hdmatx,hdma_usart2_tx);
    
        /* USART2 interrupt Init */
    
        HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
        HAL_NVIC_EnableIRQ(USART2_IRQn);
      /* USER CODE BEGIN USART2_MspInit 1 */
    
      /* USER CODE END USART2_MspInit 1 */
      }

Dies ist die Interrupt-Funktion in stm32f4xx_it.c

void DMA1_Stream5_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Stream5_IRQn 0 */

  /* USER CODE END DMA1_Stream5_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_usart2_rx);
  /* USER CODE BEGIN DMA1_Stream5_IRQn 1 */

  /* USER CODE END DMA1_Stream5_IRQn 1 */
}

/**
  * @brief This function handles DMA1 stream6 global interrupt.
  */
void DMA1_Stream6_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Stream6_IRQn 0 */

  /* USER CODE END DMA1_Stream6_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_usart2_tx);
  /* USER CODE BEGIN DMA1_Stream6_IRQn 1 */

  /* USER CODE END DMA1_Stream6_IRQn 1 */
}

/**
  * @brief This function handles USART2 global interrupt.
  */
void USART2_IRQHandler(void)
{
  /* USER CODE BEGIN USART2_IRQn 0 */
// SerialPrint("Hi");
  /* USER CODE END USART2_IRQn 0 */
  HAL_UART_IRQHandler(&huart2);
  /* USER CODE BEGIN USART2_IRQn 1 */

  /* USER CODE END USART2_IRQn 1 */
}

BEARBEITEN:

Ich habe diese Methode ausprobiert, aber sie hat bei mir nicht funktioniert.

  while(1U)
  {

   // Communication Test Block //

    HAL_UART_Transmit_DMA(&huart2, (uint8_t *)rs485TxBuffer, 17);
    while(!dmaTransmitCompletedFlag);
    dmaTransmitCompletedFlag = 0;
   }

  ..
void HAL_UART_TxHalfCpltCallback(UART_HandleTypeDef *huart)
{

  dmaTransmitCompletedFlag = 1;

}