/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 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
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <math.h>
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c3;

I2S_HandleTypeDef hi2s2;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C3_Init(void);
static void MX_I2S2_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
enum CodecRegister {
  CODEC_REG_LEFT_LINE_IN = 0x00,
  CODEC_REG_RIGHT_LINE_IN = 0x01,
  CODEC_REG_LEFT_HEADPHONES_OUT = 0x02,
  CODEC_REG_RIGHT_HEADPHONES_OUT = 0x03,
  CODEC_REG_ANALOGUE_ROUTING = 0x04,
  CODEC_REG_DIGITAL_ROUTING = 0x05,
  CODEC_REG_POWER_MANAGEMENT = 0x06,
  CODEC_REG_DIGITAL_FORMAT = 0x07,
  CODEC_REG_SAMPLE_RATE = 0x08,
  CODEC_REG_ACTIVE = 0x09,
  CODEC_REG_RESET = 0x0f,
};

enum CodecSettings {
  CODEC_INPUT_0_DB = 0x17,
  CODEC_INPUT_UPDATE_BOTH = 0x40,
  CODEC_HEADPHONES_MUTE = 0x00,
  CODEC_MIC_BOOST = 0x1,
  CODEC_MIC_MUTE = 0x2,
  CODEC_ADC_MIC = 0x4,
  CODEC_ADC_LINE = 0x0,
  CODEC_OUTPUT_DAC_ENABLE = 0x10,
  CODEC_OUTPUT_MONITOR = 0x20,
  CODEC_DEEMPHASIS_NONE = 0x00,
  CODEC_DEEMPHASIS_32K = 0x01,
  CODEC_DEEMPHASIS_44K = 0x02,
  CODEC_DEEMPHASIS_48K = 0x03,
  CODEC_SOFT_MUTE = 0x01,
  CODEC_ADC_HPF = 0x00,

  CODEC_POWER_DOWN_LINE_IN = 0x01,
  CODEC_POWER_DOWN_MIC = 0x02,
  CODEC_POWER_DOWN_ADC = 0x04,
  CODEC_POWER_DOWN_DAC = 0x08,
  CODEC_POWER_DOWN_LINE_OUT = 0x10,
  CODEC_POWER_DOWN_OSCILLATOR = 0x20,
  CODEC_POWER_DOWN_CLOCK_OUTPUT = 0x40,
  CODEC_POWER_DOWN_EVERYTHING = 0x80,

  CODEC_PROTOCOL_MASK_MSB_FIRST = 0x00,
  CODEC_PROTOCOL_MASK_LSB_FIRST = 0x01,
  CODEC_PROTOCOL_MASK_PHILIPS = 0x02,
  CODEC_PROTOCOL_MASK_DSP = 0x03,

  CODEC_FORMAT_MASK_16_BIT = 0x00 << 2,
  CODEC_FORMAT_MASK_20_BIT = 0x01 << 2,
  CODEC_FORMAT_MASK_24_BIT = 0x02 << 2,
  CODEC_FORMAT_MASK_32_BIT = 0x03 << 2,

  CODEC_FORMAT_LR_SWAP = 0x20,
  CODEC_FORMAT_MASTER = 0x40,
  CODEC_FORMAT_SLAVE = 0x00,
  CODEC_FORMAT_INVERT_CLOCK = 0x80,

  CODEC_RATE_48K_48K = 0x00 << 2,
  CODEC_RATE_8K_8K = 0x03 << 2,
  CODEC_RATE_96K_96K = 0x07 << 2,
  CODEC_RATE_32K_32K = 0x06 << 2,
  CODEC_RATE_44K_44K = 0x08 << 2,
};



uint8_t init_codec() {
    uint8_t status = 0;
    uint8_t val = 0;
    // reset codec
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_RESET, 1, &val, 1, HAL_MAX_DELAY);

    // config headphone outputs
//  val = CODEC_HEADPHONES_MUTE;
//  status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_LEFT_HEADPHONES_OUT, 1, &val, 1, HAL_MAX_DELAY);
//  status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_RIGHT_HEADPHONES_OUT, 1, &val, 1, HAL_MAX_DELAY);
    // config analog routing
    val = CODEC_MIC_MUTE | CODEC_ADC_LINE | CODEC_OUTPUT_DAC_ENABLE;
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_ANALOGUE_ROUTING, 1, &val, 1, HAL_MAX_DELAY);
    // Configure digital routing
    val = CODEC_DEEMPHASIS_NONE;
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_DIGITAL_ROUTING, 1, &val, 1, HAL_MAX_DELAY);
    // config power management
    val = CODEC_POWER_DOWN_MIC;
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_POWER_MANAGEMENT, 1, &val, 1, HAL_MAX_DELAY);
    // format byte
    val = CODEC_PROTOCOL_MASK_PHILIPS | CODEC_FORMAT_MASK_16_BIT | CODEC_FORMAT_MASTER;
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_DIGITAL_FORMAT, 1, &val, 1, HAL_MAX_DELAY);
    val = CODEC_RATE_48K_48K;
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_SAMPLE_RATE, 1, &val, 1, HAL_MAX_DELAY);
    // For now codec is not active.
    val = 0x01;
    status += HAL_I2C_Mem_Write(&hi2c3, (0x1A << 1 ), CODEC_REG_ACTIVE, 1, &val, 1, HAL_MAX_DELAY);

    return status;

}
static int16_t audio_data[2 * 1200];
void play_tone() {
    for (int i = 0; i < 1200; i++) {
        int16_t value = (int16_t)(32000.0 * sin(2.0 * M_PI * i / 48.0));
        audio_data[i * 2] = value;
        audio_data[i * 2 + 1] = value;
    }
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_I2C3_Init();
  MX_I2S2_Init();
  /* USER CODE BEGIN 2 */
  uint8_t status = init_codec();
  play_tone();
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
      HAL_I2S_Transmit(&hi2s2, (uint16_t*)audio_data, 2 * 1200, HAL_MAX_DELAY);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 8;
  RCC_OscInitStruct.PLL.PLLN = 168;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2S;
  PeriphClkInitStruct.PLLI2S.PLLI2SN = 192;
  PeriphClkInitStruct.PLLI2S.PLLI2SR = 2;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief I2C3 Initialization Function
  * @param None
  * @retval None
  */
static void MX_I2C3_Init(void)
{

  /* USER CODE BEGIN I2C3_Init 0 */

  /* USER CODE END I2C3_Init 0 */

  /* USER CODE BEGIN I2C3_Init 1 */

  /* USER CODE END I2C3_Init 1 */
  hi2c3.Instance = I2C3;
  hi2c3.Init.ClockSpeed = 100000;
  hi2c3.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c3.Init.OwnAddress1 = 0;
  hi2c3.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c3.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c3.Init.OwnAddress2 = 0;
  hi2c3.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c3.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c3) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN I2C3_Init 2 */

  /* USER CODE END I2C3_Init 2 */

}

/**
  * @brief I2S2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_I2S2_Init(void)
{

  /* USER CODE BEGIN I2S2_Init 0 */

  /* USER CODE END I2S2_Init 0 */

  /* USER CODE BEGIN I2S2_Init 1 */

  /* USER CODE END I2S2_Init 1 */
  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_48K;
  hi2s2.Init.CPOL = I2S_CPOL_LOW;
  hi2s2.Init.ClockSource = I2S_CLOCK_PLL;
  hi2s2.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_DISABLE;
  if (HAL_I2S_Init(&hi2s2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN I2S2_Init 2 */

  /* USER CODE END I2S2_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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