text: /**
    ******************************************************************************
    * File Name          : USART.c
    * Description        : This file provides code for the configuration
    *                      of the USART instances.
    ******************************************************************************
    * This notice applies to any and all portions of this file
    * that are not between comment pairs USER CODE BEGIN and
    * USER CODE END. Other portions of this file, whether 
    * inserted by the user or by software development tools
    * are owned by their respective copyright owners.
    *
    * Copyright (c) 2018 STMicroelectronics International N.V. 
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without 
    * modification, are permitted, provided that the following conditions are met:
    *
    * 1. Redistribution of source code must retain the above copyright notice, 
    *    this list of conditions and the following disclaimer.
    * 2. Redistributions in binary form must reproduce the above copyright notice,
    *    this list of conditions and the following disclaimer in the documentation
    *    and/or other materials provided with the distribution.
    * 3. Neither the name of STMicroelectronics nor the names of other 
    *    contributors to this software may be used to endorse or promote products 
    *    derived from this software without specific written permission.
    * 4. This software, including modifications and/or derivative works of this 
    *    software, must execute solely and exclusively on microcontroller or
    *    microprocessor devices manufactured by or for STMicroelectronics.
    * 5. Redistribution and use of this software other than as permitted under 
    *    this license is void and will automatically terminate your rights under 
    *    this license. 
    *
    * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
    * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
    * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
    * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
    * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
    * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
    * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
    * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
    * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
    * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    ******************************************************************************
    */
  
  /* Includes ------------------------------------------------------------------*/
  #include "usart.h"
  
  #include "gpio.h"
  #include "dma.h"
  
  /* USER CODE BEGIN 0 */
  
  /* USER CODE END 0 */
  
  UART_HandleTypeDef huart4;
  UART_HandleTypeDef huart2;
  DMA_HandleTypeDef hdma_uart4_rx;
  DMA_HandleTypeDef hdma_uart4_tx;
  DMA_HandleTypeDef hdma_usart2_rx;
  DMA_HandleTypeDef hdma_usart2_tx;
  
  /* UART4 init function */
  void MX_UART4_Init(void)
  {
  
    huart4.Instance = UART4;
    //huart4.Init.BaudRate = 115200;  // Provisionally this can be changed to 921600 for faster transfers, the low power Arduinos will not keep up. 
    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;
    if (HAL_UART_Init(&huart4) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }
  
  }
  /* USART2 init function */
  
  void MX_USART2_UART_Init(void)
  {
  
    huart2.Instance = USART2;
    //huart2.Init.BaudRate = 115200;
    huart2.Init.WordLength = UART_WORDLENGTH_8B;
    huart2.Init.StopBits = UART_STOPBITS_1;
    huart2.Init.Parity = UART_PARITY_NONE;
    huart2.Init.Mode = UART_MODE_TX_RX;
    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart2.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart2) != HAL_OK)
    {
      Error_Handler();
    }
  
  }
  
  void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
  {
  
    if(uartHandle->Instance==UART4)
    {
    /* USER CODE BEGIN UART4_MspInit 0 */
  
    /* USER CODE END UART4_MspInit 0 */
      /* UART4 clock enable */
      __HAL_RCC_UART4_CLK_ENABLE();
  
      /* UART4 DMA Init */
      /* UART4_RX Init */
      hdma_uart4_rx.Instance = DMA1_Stream2;
      hdma_uart4_rx.Init.Channel = DMA_CHANNEL_4;
      hdma_uart4_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
      hdma_uart4_rx.Init.PeriphInc = DMA_PINC_DISABLE;
      hdma_uart4_rx.Init.MemInc = DMA_MINC_ENABLE;
      hdma_uart4_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
      hdma_uart4_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
      hdma_uart4_rx.Init.Mode = DMA_CIRCULAR;
      hdma_uart4_rx.Init.Priority = DMA_PRIORITY_LOW;
      hdma_uart4_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
      if (HAL_DMA_Init(&hdma_uart4_rx) != HAL_OK)
      {
        _Error_Handler(__FILE__, __LINE__);
      }
  
      __HAL_LINKDMA(uartHandle,hdmarx,hdma_uart4_rx);
  
      /* UART4_TX Init */
      hdma_uart4_tx.Instance = DMA1_Stream4;
      hdma_uart4_tx.Init.Channel = DMA_CHANNEL_4;
      hdma_uart4_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
      hdma_uart4_tx.Init.PeriphInc = DMA_PINC_DISABLE;
      hdma_uart4_tx.Init.MemInc = DMA_MINC_ENABLE;
      hdma_uart4_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
      hdma_uart4_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
      hdma_uart4_tx.Init.Mode = DMA_NORMAL;
      hdma_uart4_tx.Init.Priority = DMA_PRIORITY_LOW;
      hdma_uart4_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
      if (HAL_DMA_Init(&hdma_uart4_tx) != HAL_OK)
      {
        _Error_Handler(__FILE__, __LINE__);
      }
  
      __HAL_LINKDMA(uartHandle,hdmatx,hdma_uart4_tx);
  
      /* UART4 interrupt Init */
      HAL_NVIC_SetPriority(UART4_IRQn, 10, 0);
      HAL_NVIC_EnableIRQ(UART4_IRQn);
    /* USER CODE BEGIN UART4_MspInit 1 */
  
    /* USER CODE END UART4_MspInit 1 */
    }
    else if(uartHandle->Instance==USART2)
    {
    /* USER CODE BEGIN USART2_MspInit 0 */
  
    /* USER CODE END USART2_MspInit 0 */
      /* USART2 clock enable */
      __HAL_RCC_USART2_CLK_ENABLE();
  
      /* 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_CIRCULAR;
      hdma_usart2_rx.Init.Priority = DMA_PRIORITY_LOW;
      hdma_usart2_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
      if (HAL_DMA_Init(&hdma_usart2_rx) != HAL_OK)
      {
        _Error_Handler(__FILE__, __LINE__);
      }
  
      __HAL_LINKDMA(uartHandle,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_BYTE;
      hdma_usart2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
      hdma_usart2_tx.Init.Mode = DMA_NORMAL;
      hdma_usart2_tx.Init.Priority = DMA_PRIORITY_LOW;
      hdma_usart2_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
      if (HAL_DMA_Init(&hdma_usart2_tx) != HAL_OK)
      {
        _Error_Handler(__FILE__, __LINE__);
      }
  
      __HAL_LINKDMA(uartHandle,hdmatx,hdma_usart2_tx);
  
      /* USART2 interrupt Init */
      HAL_NVIC_SetPriority(USART2_IRQn, 10, 0);
      HAL_NVIC_EnableIRQ(USART2_IRQn);
    /* USER CODE BEGIN USART2_MspInit 1 */
  
    /* USER CODE END USART2_MspInit 1 */
    }
  }
  
  void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
  {
  
    if(uartHandle->Instance==UART4)
    {
    /* USER CODE BEGIN UART4_MspDeInit 0 */
  
    /* USER CODE END UART4_MspDeInit 0 */
      /* Peripheral clock disable */
      __HAL_RCC_UART4_CLK_DISABLE();
  
      /* UART4 DMA DeInit */
      HAL_DMA_DeInit(uartHandle->hdmarx);
      HAL_DMA_DeInit(uartHandle->hdmatx);
  
      /* UART4 interrupt Deinit */
      HAL_NVIC_DisableIRQ(UART4_IRQn);
    /* USER CODE BEGIN UART4_MspDeInit 1 */
  
    /* USER CODE END UART4_MspDeInit 1 */
    }
    else if(uartHandle->Instance==USART2)
    {
    /* USER CODE BEGIN USART2_MspDeInit 0 */
  
    /* USER CODE END USART2_MspDeInit 0 */
      /* Peripheral clock disable */
      __HAL_RCC_USART2_CLK_DISABLE();
  
      /* USART2 DMA DeInit */
      HAL_DMA_DeInit(uartHandle->hdmarx);
      HAL_DMA_DeInit(uartHandle->hdmatx);
  
      /* USART2 interrupt Deinit */
      HAL_NVIC_DisableIRQ(USART2_IRQn);
    /* USER CODE BEGIN USART2_MspDeInit 1 */
  
    /* USER CODE END USART2_MspDeInit 1 */
    }
  } 
  
  /* USER CODE BEGIN 1 */
  
  /* USER CODE END 1 */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  