text: /* 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 "MY_CS43L22.h"
  #include <math.h>
  
  #define PI 3.14159f
  
  #define F_SAMPLE 50000.0f
  #define F_OUT 1000.0f
  
  /* 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 ---------------------------------------------------------*/
  DAC_HandleTypeDef hdac;
  
  I2C_HandleTypeDef hi2c1;
  
  I2S_HandleTypeDef hi2s3;
  DMA_HandleTypeDef hdma_spi3_tx;
  
  TIM_HandleTypeDef htim2;
  
  /* USER CODE BEGIN PV */
  
  /* USER CODE END PV */
  
  /* Private function prototypes -----------------------------------------------*/
  void SystemClock_Config(void);
  static void MX_GPIO_Init(void);
  static void MX_DMA_Init(void);
  static void MX_DAC_Init(void);
  static void MX_I2C1_Init(void);
  static void MX_I2S3_Init(void);
  static void MX_TIM2_Init(void);
  /* USER CODE BEGIN PFP */
  
  /* USER CODE END PFP */
  
  /* Private user code ---------------------------------------------------------*/
  /* USER CODE BEGIN 0 */
  float mySinVal;
  float sample_dt;
  uint16_t sample_N;
  uint16_t i_t;
  
  uint32_t myDacVal;
  uint16_t I2S_dummy[4];
  /* USER CODE END 0 */
  
  /**
    * @brief  The application entry point.
    * @retval int
    */
  int main(void)
  {
      /* USER CODE BEGIN 1 */
      sample_dt = F_OUT / F_SAMPLE;
      sample_N = F_SAMPLE / F_OUT;
      /* 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_DMA_Init();
      MX_DAC_Init();
      MX_I2C1_Init();
      MX_I2S3_Init();
      MX_TIM2_Init();
      /* USER CODE BEGIN 2 */
      CS43_Init(hi2c1, MODE_ANALOG);
      CS43_SetVolume(30);
      CS43_Enable_RightLeft(CS43_RIGHT_LEFT);
      CS43_Start();
  
      HAL_I2S_Transmit_DMA(&hi2s3, (uint16_t *)I2S_dummy, 4);
  
      HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
      HAL_TIM_Base_Start_IT(&htim2);
      /* USER CODE END 2 */
  
      /* Infinite loop */
      /* USER CODE BEGIN WHILE */
      while (1)
      {
          /* 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_HSE;
      RCC_OscInitStruct.HSEState = RCC_HSE_ON;
      RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
      RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
      RCC_OscInitStruct.PLL.PLLM = 4;
      RCC_OscInitStruct.PLL.PLLN = 168;
      RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
      RCC_OscInitStruct.PLL.PLLQ = 7;
      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 = 50;
      PeriphClkInitStruct.PLLI2S.PLLI2SR = 2;
      if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
      {
          Error_Handler();
      }
  }
  
  /**
    * @brief DAC Initialization Function
    * @param None
    * @retval None
    */
  static void MX_DAC_Init(void)
  {
  
      /* USER CODE BEGIN DAC_Init 0 */
  
      /* USER CODE END DAC_Init 0 */
  
      DAC_ChannelConfTypeDef sConfig = {0};
  
      /* USER CODE BEGIN DAC_Init 1 */
  
      /* USER CODE END DAC_Init 1 */
      /** DAC Initialization
    */
      hdac.Instance = DAC;
      if (HAL_DAC_Init(&hdac) != HAL_OK)
      {
          Error_Handler();
      }
      /** DAC channel OUT1 config
    */
      sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
      sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
      if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
      {
          Error_Handler();
      }
      /* USER CODE BEGIN DAC_Init 2 */
  
      /* USER CODE END DAC_Init 2 */
  }
  
  /**
    * @brief I2C1 Initialization Function
    * @param None
    * @retval None
    */
  static void MX_I2C1_Init(void)
  {
  
      /* USER CODE BEGIN I2C1_Init 0 */
  
      /* USER CODE END I2C1_Init 0 */
  
      /* USER CODE BEGIN I2C1_Init 1 */
  
      /* USER CODE END I2C1_Init 1 */
      hi2c1.Instance = I2C1;
      hi2c1.Init.ClockSpeed = 100000;
      hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
      hi2c1.Init.OwnAddress1 = 0;
      hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
      hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
      hi2c1.Init.OwnAddress2 = 0;
      hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
      hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
      if (HAL_I2C_Init(&hi2c1) != HAL_OK)
      {
          Error_Handler();
      }
      /* USER CODE BEGIN I2C1_Init 2 */
  
      /* USER CODE END I2C1_Init 2 */
  }
  
  /**
    * @brief I2S3 Initialization Function
    * @param None
    * @retval None
    */
  static void MX_I2S3_Init(void)
  {
  
      /* USER CODE BEGIN I2S3_Init 0 */
  
      /* USER CODE END I2S3_Init 0 */
  
      /* USER CODE BEGIN I2S3_Init 1 */
  
      /* USER CODE END I2S3_Init 1 */
      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_ENABLE;
      hi2s3.Init.AudioFreq = I2S_AUDIOFREQ_48K;
      hi2s3.Init.CPOL = I2S_CPOL_LOW;
      hi2s3.Init.ClockSource = I2S_CLOCK_PLL;
      hi2s3.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_DISABLE;
      if (HAL_I2S_Init(&hi2s3) != HAL_OK)
      {
          Error_Handler();
      }
      /* USER CODE BEGIN I2S3_Init 2 */
  
      /* USER CODE END I2S3_Init 2 */
  }
  
  /**
    * @brief TIM2 Initialization Function
    * @param None
    * @retval None
    */
  static void MX_TIM2_Init(void)
  {
  
      /* USER CODE BEGIN TIM2_Init 0 */
  
      /* USER CODE END TIM2_Init 0 */
  
      TIM_ClockConfigTypeDef sClockSourceConfig = {0};
      TIM_MasterConfigTypeDef sMasterConfig = {0};
  
      /* USER CODE BEGIN TIM2_Init 1 */
  
      /* USER CODE END TIM2_Init 1 */
      htim2.Instance = TIM2;
      htim2.Init.Prescaler = 84 - 1;
      htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
      htim2.Init.Period = 20 - 1;
      htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
      htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
      if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
      {
          Error_Handler();
      }
      sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
      if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
      {
          Error_Handler();
      }
      sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
      sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
      if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
      {
          Error_Handler();
      }
      /* USER CODE BEGIN TIM2_Init 2 */
  
      /* USER CODE END TIM2_Init 2 */
  }
  
  /**
    * Enable DMA controller clock
    */
  static void MX_DMA_Init(void)
  {
  
      /* DMA controller clock enable */
      __HAL_RCC_DMA1_CLK_ENABLE();
  
      /* DMA interrupt init */
      /* DMA1_Stream5_IRQn interrupt configuration */
      HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
  }
  
  /**
    * @brief GPIO Initialization Function
    * @param None
    * @retval None
    */
  static void MX_GPIO_Init(void)
  {
      GPIO_InitTypeDef GPIO_InitStruct = {0};
  
      /* GPIO Ports Clock Enable */
      __HAL_RCC_GPIOH_CLK_ENABLE();
      __HAL_RCC_GPIOA_CLK_ENABLE();
      __HAL_RCC_GPIOD_CLK_ENABLE();
      __HAL_RCC_GPIOC_CLK_ENABLE();
      __HAL_RCC_GPIOB_CLK_ENABLE();
  
      /*Configure GPIO pin Output Level */
      HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15 | GPIO_PIN_4, GPIO_PIN_RESET);
  
      /*Configure GPIO pins : PD12 PD13 PD14 PD15
                             PD4 */
      GPIO_InitStruct.Pin = GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15 | GPIO_PIN_4;
      GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
      GPIO_InitStruct.Pull = GPIO_NOPULL;
      GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
      HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
  }
  
  /* USER CODE BEGIN 4 */
  void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
  {
      UNUSED(htim);
  
      if (htim->Instance == TIM2)
      {
          mySinVal = sinf(i_t * 2 * PI * sample_dt);
  
          myDacVal = (mySinVal + 1) * 127;
  
          HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_8B_R, myDacVal);
  
          i_t++;
          if (i_t >= sample_N)
              i_t = 0;
      }
  }
  /* 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 */
      __disable_irq();
      while (1)
      {
      }
      /* 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,
       ex: 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****/
  