---

main.c:
/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2026 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "i2c.h"
#include "i2s.h"
#include "spi.h"
#include "usb_host.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* 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 ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void MX_USB_HOST_Process(void);

/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void Blink(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
    for(int i = 0; i < 3; i++)
    {
        HAL_GPIO_WritePin(GPIOx, GPIO_Pin, GPIO_PIN_SET);
        HAL_Delay(300);

        HAL_GPIO_WritePin(GPIOx, GPIO_Pin, GPIO_PIN_RESET);
        HAL_Delay(300);
    }
}

/* 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_I2C1_Init();
  MX_I2S3_Init();
  MX_SPI1_Init();
  MX_USB_HOST_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_11, GPIO_PIN_SET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_10, GPIO_PIN_SET);

	  	  HAL_Delay(5000);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_10, GPIO_PIN_RESET);

	  	  Blink(GPIOD, GPIO_PIN_10);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_9, GPIO_PIN_SET);

	  	  HAL_Delay(1000);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_11, GPIO_PIN_RESET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_RESET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_9, GPIO_PIN_RESET);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_13, GPIO_PIN_SET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_8, GPIO_PIN_SET);

	  	  HAL_Delay(5000);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_13, GPIO_PIN_RESET);

	  	  Blink(GPIOD, GPIO_PIN_13);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_8, GPIO_PIN_RESET);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_8, GPIO_PIN_SET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_9, GPIO_PIN_SET);

	  	  HAL_Delay(1000);

	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_RESET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_8, GPIO_PIN_RESET);
	  	  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_9, GPIO_PIN_RESET);
    /* USER CODE END WHILE */
    MX_USB_HOST_Process();

    /* 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};

  /** 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 = 8;
  RCC_OscInitStruct.PLL.PLLN = 336;
  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();
  }
}

/* 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 */
  __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 */



main.h:
/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.h
  * @brief          : Header for main.c file.
  *                   This file contains the common defines of the application.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2026 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __MAIN_H
#define __MAIN_H

#ifdef __cplusplus
extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Exported types ------------------------------------------------------------*/
/* USER CODE BEGIN ET */

/* USER CODE END ET */

/* Exported constants --------------------------------------------------------*/
/* USER CODE BEGIN EC */

/* USER CODE END EC */

/* Exported macro ------------------------------------------------------------*/
/* USER CODE BEGIN EM */

/* USER CODE END EM */

/* Exported functions prototypes ---------------------------------------------*/
void Error_Handler(void);

/* USER CODE BEGIN EFP */

/* USER CODE END EFP */

/* Private defines -----------------------------------------------------------*/
#define CS_I2C_SPI_Pin GPIO_PIN_3
#define CS_I2C_SPI_GPIO_Port GPIOE
#define PC14_OSC32_IN_Pin GPIO_PIN_14
#define PC14_OSC32_IN_GPIO_Port GPIOC
#define PC15_OSC32_OUT_Pin GPIO_PIN_15
#define PC15_OSC32_OUT_GPIO_Port GPIOC
#define PH0_OSC_IN_Pin GPIO_PIN_0
#define PH0_OSC_IN_GPIO_Port GPIOH
#define PH1_OSC_OUT_Pin GPIO_PIN_1
#define PH1_OSC_OUT_GPIO_Port GPIOH
#define OTG_FS_PowerSwitchOn_Pin GPIO_PIN_0
#define OTG_FS_PowerSwitchOn_GPIO_Port GPIOC
#define PDM_OUT_Pin GPIO_PIN_3
#define PDM_OUT_GPIO_Port GPIOC
#define B1_Pin GPIO_PIN_0
#define B1_GPIO_Port GPIOA
#define I2S3_WS_Pin GPIO_PIN_4
#define I2S3_WS_GPIO_Port GPIOA
#define SPI1_SCK_Pin GPIO_PIN_5
#define SPI1_SCK_GPIO_Port GPIOA
#define SPI1_MISO_Pin GPIO_PIN_6
#define SPI1_MISO_GPIO_Port GPIOA
#define SPI1_MOSI_Pin GPIO_PIN_7
#define SPI1_MOSI_GPIO_Port GPIOA
#define BOOT1_Pin GPIO_PIN_2
#define BOOT1_GPIO_Port GPIOB
#define CLK_IN_Pin GPIO_PIN_10
#define CLK_IN_GPIO_Port GPIOB
#define LD5_Pin GPIO_PIN_14
#define LD5_GPIO_Port GPIOD
#define LD6_Pin GPIO_PIN_15
#define LD6_GPIO_Port GPIOD
#define I2S3_MCK_Pin GPIO_PIN_7
#define I2S3_MCK_GPIO_Port GPIOC
#define VBUS_FS_Pin GPIO_PIN_9
#define VBUS_FS_GPIO_Port GPIOA
#define OTG_FS_ID_Pin GPIO_PIN_10
#define OTG_FS_ID_GPIO_Port GPIOA
#define OTG_FS_DM_Pin GPIO_PIN_11
#define OTG_FS_DM_GPIO_Port GPIOA
#define OTG_FS_DP_Pin GPIO_PIN_12
#define OTG_FS_DP_GPIO_Port GPIOA
#define SWDIO_Pin GPIO_PIN_13
#define SWDIO_GPIO_Port GPIOA
#define SWCLK_Pin GPIO_PIN_14
#define SWCLK_GPIO_Port GPIOA
#define I2S3_SCK_Pin GPIO_PIN_10
#define I2S3_SCK_GPIO_Port GPIOC
#define I2S3_SD_Pin GPIO_PIN_12
#define I2S3_SD_GPIO_Port GPIOC
#define Audio_RST_Pin GPIO_PIN_4
#define Audio_RST_GPIO_Port GPIOD
#define OTG_FS_OverCurrent_Pin GPIO_PIN_5
#define OTG_FS_OverCurrent_GPIO_Port GPIOD
#define SWO_Pin GPIO_PIN_3
#define SWO_GPIO_Port GPIOB
#define Audio_SCL_Pin GPIO_PIN_6
#define Audio_SCL_GPIO_Port GPIOB
#define Audio_SDA_Pin GPIO_PIN_9
#define Audio_SDA_GPIO_Port GPIOB
#define MEMS_INT2_Pin GPIO_PIN_1
#define MEMS_INT2_GPIO_Port GPIOE

/* USER CODE BEGIN Private defines */

/* USER CODE END Private defines */

#ifdef __cplusplus
}
#endif

#endif /* __MAIN_H */