xref: /btstack/port/stm32-f4discovery-cc256x/Src/i2s.c (revision 225f4ba4fe806afeda1ee8519bb5f4a8ce540af2)

/**
  ******************************************************************************
  * File Name          : I2S.c
  * Description        : This file provides code for the configuration
  *                      of the I2S instances.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "i2s.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

I2S_HandleTypeDef hi2s2;

/* I2S2 init function */
void MX_I2S2_Init(void)
{

  hi2s2.Instance = SPI2;
  hi2s2.Init.Mode = I2S_MODE_MASTER_TX;
  hi2s2.Init.Standard = I2S_STANDARD_PHILIPS;
  hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B;
  hi2s2.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
  hi2s2.Init.AudioFreq = I2S_AUDIOFREQ_8K;
  hi2s2.Init.CPOL = I2S_CPOL_LOW;
  hi2s2.Init.ClockSource = I2S_CLOCK_PLL;
  hi2s2.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_ENABLE;
  if (HAL_I2S_Init(&hi2s2) != HAL_OK)
  {
    Error_Handler();
  }

}

void HAL_I2S_MspInit(I2S_HandleTypeDef* i2sHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(i2sHandle->Instance==SPI2)
  {
  /* USER CODE BEGIN SPI2_MspInit 0 */

  /* USER CODE END SPI2_MspInit 0 */
    /* I2S2 clock enable */
    __HAL_RCC_SPI2_CLK_ENABLE();

    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    /**I2S2 GPIO Configuration
    PC2     ------> I2S2_ext_SD
    PC3     ------> I2S2_SD
    PB10     ------> I2S2_CK
    PB12     ------> I2S2_WS
    */
    GPIO_InitStruct.Pin = GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF6_I2S2ext;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = PDM_OUT_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
    HAL_GPIO_Init(PDM_OUT_GPIO_Port, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = CLK_IN_Pin|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_AF5_SPI2;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* USER CODE BEGIN SPI2_MspInit 1 */

  /* USER CODE END SPI2_MspInit 1 */
  }
}

void HAL_I2S_MspDeInit(I2S_HandleTypeDef* i2sHandle)
{

  if(i2sHandle->Instance==SPI2)
  {
  /* USER CODE BEGIN SPI2_MspDeInit 0 */

  /* USER CODE END SPI2_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_SPI2_CLK_DISABLE();

    /**I2S2 GPIO Configuration
    PC2     ------> I2S2_ext_SD
    PC3     ------> I2S2_SD
    PB10     ------> I2S2_CK
    PB12     ------> I2S2_WS
    */
    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_2|PDM_OUT_Pin);

    HAL_GPIO_DeInit(GPIOB, CLK_IN_Pin|GPIO_PIN_12);

  /* USER CODE BEGIN SPI2_MspDeInit 1 */

  /* USER CODE END SPI2_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

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