/**
  ******************************************************************************
  * File Name          : I2S.c
  * Description        : This file provides code for the configuration
  *                      of the I2S instances.
  ******************************************************************************
  *
  * Copyright (c) 2017 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 "i2s.h"

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

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

I2S_HandleTypeDef hi2s3;
DMA_HandleTypeDef hdma_spi3_tx;
DMA_HandleTypeDef hdma_i2s3_ext_rx;

/* I2S3 init function */
void MX_I2S3_Init(void)
{

  hi2s3.Instance = SPI3;
  hi2s3.Init.Mode = I2S_MODE_MASTER_TX;
  hi2s3.Init.Standard = I2S_STANDARD_PHILIPS;
  hi2s3.Init.DataFormat = I2S_DATAFORMAT_16B;
  hi2s3.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
  hi2s3.Init.AudioFreq = I2S_AUDIOFREQ_48K;
  hi2s3.Init.CPOL = I2S_CPOL_LOW;
  hi2s3.Init.ClockSource = I2S_CLOCK_PLL;
  hi2s3.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_ENABLE;
  if (HAL_I2S_Init(&hi2s3) != HAL_OK)
  {
    Error_Handler();
  }

}

void HAL_I2S_MspInit(I2S_HandleTypeDef* i2sHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(i2sHandle->Instance==SPI3)
  {
  /* USER CODE BEGIN SPI3_MspInit 0 */

  /* USER CODE END SPI3_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_SPI3_CLK_ENABLE();
  
    /**I2S3 GPIO Configuration    
    PA15     ------> I2S3_WS
    PC10     ------> I2S3_CK
    PC11     ------> I2S3_ext_SD
    PC12     ------> I2S3_SD 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_15;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_11;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF5_I2S3ext;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    /* Peripheral DMA init*/
  
    hdma_spi3_tx.Instance = DMA1_Stream5;
    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;
    hdma_spi3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_spi3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_spi3_tx.Init.Mode = DMA_CIRCULAR;
    hdma_spi3_tx.Init.Priority = DMA_PRIORITY_HIGH;
    hdma_spi3_tx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
    hdma_spi3_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
    hdma_spi3_tx.Init.MemBurst = DMA_MBURST_SINGLE;
    hdma_spi3_tx.Init.PeriphBurst = DMA_PBURST_SINGLE;
    if (HAL_DMA_Init(&hdma_spi3_tx) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(i2sHandle,hdmatx,hdma_spi3_tx);

    hdma_i2s3_ext_rx.Instance = DMA1_Stream2;
    hdma_i2s3_ext_rx.Init.Channel = DMA_CHANNEL_2;
    hdma_i2s3_ext_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_i2s3_ext_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_i2s3_ext_rx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_i2s3_ext_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_i2s3_ext_rx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_i2s3_ext_rx.Init.Mode = DMA_CIRCULAR;
    hdma_i2s3_ext_rx.Init.Priority = DMA_PRIORITY_HIGH;
    hdma_i2s3_ext_rx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
    hdma_i2s3_ext_rx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
    hdma_i2s3_ext_rx.Init.MemBurst = DMA_MBURST_INC4;
    hdma_i2s3_ext_rx.Init.PeriphBurst = DMA_PBURST_SINGLE;
    if (HAL_DMA_Init(&hdma_i2s3_ext_rx) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(i2sHandle,hdmarx,hdma_i2s3_ext_rx);

  /* USER CODE BEGIN SPI3_MspInit 1 */

  /* USER CODE END SPI3_MspInit 1 */
  }
}

void HAL_I2S_MspDeInit(I2S_HandleTypeDef* i2sHandle)
{

  if(i2sHandle->Instance==SPI3)
  {
  /* USER CODE BEGIN SPI3_MspDeInit 0 */

  /* USER CODE END SPI3_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_SPI3_CLK_DISABLE();
  
    /**I2S3 GPIO Configuration    
    PA15     ------> I2S3_WS
    PC10     ------> I2S3_CK
    PC11     ------> I2S3_ext_SD
    PC12     ------> I2S3_SD 
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_15);

    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12);

    /* Peripheral DMA DeInit*/
    HAL_DMA_DeInit(i2sHandle->hdmatx);
    HAL_DMA_DeInit(i2sHandle->hdmarx);
  }
  /* 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****/