stm32g070 谁用到过这个芯片的usart3和usart4？

只看该作者 · 2022-3-22 11:24

本帖最后由 kfawj 于 2022-3-23 09:18 编辑

usart3目前可以发出数据，但发出的数据会被自己接收回来。反复产生IDLE故障中断。
usart4目前发出数据与目的数据的长度及内空均不符。
麻烦各位帮忙看看，在此先行谢过！
（下面上代码）

只看该作者 · 2022-3-22 11:26

static void MX_USART3_UART_Init(void)
{

  /* USER CODE BEGIN USART3_Init 0 */
  /* USER CODE END USART3_Init 0 */

  /* USER CODE BEGIN USART3_Init 1 */

  /* USER CODE END USART3_Init 1 */
  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;
  huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart3.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart3) != HAL_OK)
  {
Error_Handler();
  }
  /* USER CODE BEGIN USART3_Init 2 */
// __HAL_UART_CLEAR_FLAG(&huart3, UART_FLAG_FE);
// __HAL_UART_CLEAR_FLAG(&huart3, UART_FLAG_ORE);
__HAL_UART_ENABLE_IT(&huart3, UART_IT_ERR);
__HAL_UART_ENABLE_IT(&huart3, UART_IT_RXNE);
__HAL_UART_ENABLE(&huart3);
HAL_UART_Receive_IT(&huart3, &U3_RxDat_Tmp, 1);
  /* USER CODE END USART3_Init 2 */

}
static void MX_USART4_UART_Init(void)
{

  /* USER CODE BEGIN USART4_Init 0 */

  /* USER CODE END USART4_Init 0 */

  /* USER CODE BEGIN USART4_Init 1 */

  /* USER CODE END USART4_Init 1 */
  huart4.Instance = USART4;
  huart4.Init.BaudRate = 9600;
  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_DIV4;
  huart4.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart4) != HAL_OK)
  {
Error_Handler();
  }
  /* USER CODE BEGIN USART4_Init 2 */
__HAL_UART_ENABLE_IT(&huart4, UART_IT_ERR);
__HAL_UART_ENABLE_IT(&huart4, UART_IT_RXNE);
__HAL_UART_ENABLE(&huart4);
U4_Rx_Enable();
HAL_UART_Receive_IT(&huart4, &U4_RxDat_Tmp, 1);
  /* USER CODE END USART4_Init 2 */

}

只看该作者 · 2022-3-22 11:32

void USART3_4_IRQHandler(void)
{
  /* USER CODE BEGIN USART3_4_IRQn 0 */

  /* USER CODE END USART3_4_IRQn 0 */
  HAL_UART_IRQHandler(&huart3);
  HAL_UART_IRQHandler(&huart4);
  /* USER CODE BEGIN USART3_4_IRQn 1 */

  /* USER CODE END USART3_4_IRQn 1 */
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart->Instance == USART3)
{
HAL_UART_Receive_IT(&huart3, &U3_RxDat_Tmp, 1);
if(__HAL_UART_GET_FLAG(&huart3, UART_FLAG_IDLE) == SET)
{
__HAL_UART_CLEAR_IDLEFLAG(&huart3);
}
if(U3_Rx_Index >= U3_RXBUFFER_SIZE)
U3_Rx_Index = U3_RXBUFFER_SIZE - 1;
U3_RxBuf[U3_Rx_Index] = U3_RxDat_Tmp;
U3_Rx_Index++;
U3_Rx_Delay = 5;
}
else if(huart->Instance == USART4)//RS485
{
HAL_UART_Receive_IT(&huart4, &U4_RxDat_Tmp, 1);
if(U4_Rx_Index >= U4_RXBUFFER_SIZE)
U4_Rx_Index = U4_RXBUFFER_SIZE - 1;
U4_RxBuf[U4_Rx_Index] = U4_RxDat_Tmp;
U4_Rx_Index++;
U4_Rx_Delay = 5;
}
}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart->Instance == USART3)
{
__HAL_UART_CLEAR_IT(&huart3, UART_CLEAR_TCF);
__HAL_UART_DISABLE_IT(&huart3,  UART_IT_TC);
}
else if(huart->Instance == USART4)
{
__HAL_UART_CLEAR_IT(&huart4, UART_CLEAR_TCF);
__HAL_UART_DISABLE_IT(&huart4,  UART_IT_TC);
U4_Rx_Enable();
HAL_UART_Receive_IT(&huart4, &U4_RxDat_Tmp, 1);
}
}

void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
   if(huart->Instance == USART3)
{
HAL_UART_Receive_IT(&huart3, &U3_RxDat_Tmp, 1);
__HAL_UART_CLEAR_IDLEFLAG(&huart3);
// __HAL_UART_ENABLE_IT(&huart3, UART_IT_ERR);
__HAL_UART_ENABLE_IT(&huart3, UART_IT_RXNE);
}
else if(huart->Instance == USART4)
{
__HAL_UART_CLEAR_IT(&huart4, UART_CLEAR_NEF);
__HAL_UART_CLEAR_IT(&huart4, UART_CLEAR_FEF);
__HAL_UART_CLEAR_IT(&huart4, UART_CLEAR_OREF);
__HAL_UART_CLEAR_IT(&huart4, UART_CLEAR_TCF);
__HAL_UART_DISABLE_IT(&huart4,  UART_IT_TC);
U4_Rx_Enable();
HAL_UART_Receive_IT(&huart4, &U4_RxDat_Tmp, 1);
}
}

stm32g070 谁用到过这个芯片的usart3和usart4？

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