[STM32H7] 【STM32H745I-DISCO试用】RTC实时钟实验

  /*##-1- Configure the RTC peripheral #######################################*/

  RtcHandle.Instance = RTC;



  /* Configure RTC prescaler and RTC data registers */

  /* RTC configured as follows:

      - Hour Format    = Format 24

      - Asynch Prediv  = Value according to source clock

      - Synch Prediv   = Value according to source clock

      - OutPut         = Output Disable

      - OutPutPolarity = High Polarity

      - OutPutType     = Open Drain */

  RtcHandle.Init.HourFormat     = RTC_HOURFORMAT_24;

  RtcHandle.Init.AsynchPrediv   = RTC_ASYNCH_PREDIV;

  RtcHandle.Init.SynchPrediv    = RTC_SYNCH_PREDIV;

  RtcHandle.Init.OutPut         = RTC_OUTPUT_DISABLE;

  RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;

  RtcHandle.Init.OutPutType     = RTC_OUTPUT_TYPE_OPENDRAIN;

  if (HAL_RTC_Init(&RtcHandle) != HAL_OK)

  {

    /* Initialization Error */

    Error_Handler();

  }

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();

  }

  if (HAL_UARTEx_SetTxFifoThreshold(&huart3, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetRxFifoThreshold(&huart3, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_DisableFifoMode(&huart3) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN USART3_Init 2 */



  /* USER CODE END USART3_Init 2 */



}

void HAL_UART_MspInit(UART_HandleTypeDef* huart)

{

  GPIO_InitTypeDef GPIO_InitStruct = {0};

  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  if(huart->Instance==USART3)

  {

  /* USER CODE BEGIN USART3_MspInit 0 */



  /* USER CODE END USART3_MspInit 0 */



  /** Initializes the peripherals clock

  */

    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART3;

    PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1;

    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)

    {

      Error_Handler();

    }



    /* Peripheral clock enable */

    __HAL_RCC_USART3_CLK_ENABLE();



    __HAL_RCC_GPIOB_CLK_ENABLE();

    /**USART3 GPIO Configuration

    PB10     ------> USART3_TX

    PB11     ------> USART3_RX

    */

    GPIO_InitStruct.Pin = VCP_TX_Pin|VCP_RX_Pin;

    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

    GPIO_InitStruct.Pull = GPIO_NOPULL;

    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

    GPIO_InitStruct.Alternate = GPIO_AF7_USART3;

    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);



  /* USER CODE BEGIN USART3_MspInit 1 */



  /* USER CODE END USART3_MspInit 1 */



  }



}

/**

  * [url=home.php?mod=space&uid=247401]@brief[/url]  Display the current time.

  * @param  showtime : pointer to buffer

  * @retval None

  */

static void RTC_TimeShow(uint8_t* showtime)

{

  RTC_DateTypeDef sdatestructureget;

  RTC_TimeTypeDef stimestructureget;



  /* Get the RTC current Time */

  HAL_RTC_GetTime(&RtcHandle, &stimestructureget, RTC_FORMAT_BIN);

  /* Get the RTC current Date */

  HAL_RTC_GetDate(&RtcHandle, &sdatestructureget, RTC_FORMAT_BIN);

  /* Display time Format : hh:mm:ss */

  sprintf(aShowTime,"\r\n%02d:%02d:%02d",stimestructureget.Hours, stimestructureget.Minutes, stimestructureget.Seconds);

  HAL_UART_Transmit(&huart3, aShowTime, sizeof(aShowTime), 0xffffffff);

}