/**
  ******************************************************************************
  * File Name          : SPI.c
  * Description        : This file provides code for the configuration
  *                      of the SPI 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 "spi.h"

#include "gpio.h"
#include "dma.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

SPI_HandleTypeDef hspi3;
DMA_HandleTypeDef hdma_spi3_tx;
DMA_HandleTypeDef hdma_spi3_rx;

/* SPI3 init function */
void MX_SPI3_Init(void)
{

  hspi3.Instance = SPI3;
  hspi3.Init.Mode = SPI_MODE_MASTER;
  hspi3.Init.Direction = SPI_DIRECTION_2LINES;
  hspi3.Init.DataSize = SPI_DATASIZE_16BIT;
  hspi3.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi3.Init.CLKPhase = SPI_PHASE_2EDGE;
  hspi3.Init.NSS = SPI_NSS_SOFT;
  hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
  hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi3.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi3.Init.CRCPolynomial = 10;
  if (HAL_SPI_Init(&hspi3) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(spiHandle->Instance==SPI3)
  {
  /* USER CODE BEGIN SPI3_MspInit 0 */

  /* USER CODE END SPI3_MspInit 0 */
    /* SPI3 clock enable */
    __HAL_RCC_SPI3_CLK_ENABLE();
  
    /**SPI3 GPIO Configuration    
    PC10     ------> SPI3_SCK
    PC11     ------> SPI3_MISO
    PC12     ------> SPI3_MOSI 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_PULLDOWN; // Idle clock and MOSI low.
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    // MISO pull-up required for disconnect detection on SPI encoders with even parity
    GPIO_InitStruct.Pin = GPIO_PIN_11;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    /* SPI3 DMA Init */
    /* SPI3_TX Init */
    hdma_spi3_tx.Instance = DMA1_Stream7;
    hdma_spi3_tx.Init.Channel = DMA_CHANNEL_0;
    hdma_spi3_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_spi3_tx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_spi3_tx.Init.MemInc = DMA_MINC_ENABLE;

    if(spiHandle->Init.DataSize == SPI_DATASIZE_8BIT){
      hdma_spi3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
      hdma_spi3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    } else {
      hdma_spi3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
      hdma_spi3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;      
    }
    
    hdma_spi3_tx.Init.Mode = DMA_NORMAL;
    hdma_spi3_tx.Init.Priority = DMA_PRIORITY_HIGH; // SPI TX must have higher priority than SPI RX
    hdma_spi3_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_spi3_tx) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }

    __HAL_LINKDMA(spiHandle,hdmatx,hdma_spi3_tx);

    /* SPI3_RX Init */
    hdma_spi3_rx.Instance = DMA1_Stream0;
    hdma_spi3_rx.Init.Channel = DMA_CHANNEL_0;
    hdma_spi3_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_spi3_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_spi3_rx.Init.MemInc = DMA_MINC_ENABLE;
    if (spiHandle->Init.DataSize == SPI_DATASIZE_8BIT) {
        hdma_spi3_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
        hdma_spi3_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    } else {
        hdma_spi3_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
        hdma_spi3_rx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    }
    hdma_spi3_rx.Init.Mode = DMA_NORMAL;
    hdma_spi3_rx.Init.Priority = DMA_PRIORITY_MEDIUM;
    hdma_spi3_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_spi3_rx) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }

    __HAL_LINKDMA(spiHandle,hdmarx,hdma_spi3_rx);

    /* SPI3 interrupt Init */
    //HAL_NVIC_SetPriority(SPI3_IRQn, 3, 0);
    //HAL_NVIC_EnableIRQ(SPI3_IRQn);
  /* USER CODE BEGIN SPI3_MspInit 1 */

  /* USER CODE END SPI3_MspInit 1 */
  }
}

void HAL_SPI_MspDeInit(SPI_HandleTypeDef* spiHandle)
{

  if(spiHandle->Instance==SPI3)
  {
  /* USER CODE BEGIN SPI3_MspDeInit 0 */

  /* USER CODE END SPI3_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_SPI3_CLK_DISABLE();
  
    /**SPI3 GPIO Configuration    
    PC10     ------> SPI3_SCK
    PC11     ------> SPI3_MISO
    PC12     ------> SPI3_MOSI 
    */
    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12);

    /* SPI3 DMA DeInit */
    HAL_DMA_DeInit(spiHandle->hdmatx);
    HAL_DMA_DeInit(spiHandle->hdmarx);

    /* SPI3 interrupt Deinit */
    HAL_NVIC_DisableIRQ(SPI3_IRQn);
  /* USER CODE BEGIN SPI3_MspDeInit 1 */

  /* USER CODE END SPI3_MspDeInit 1 */
  }
} 

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
