/* 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 Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "usbd_core.h"
#include "usb_dfu.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 ---------------------------------------------------------*/
UART_HandleTypeDef huart1;

PCD_HandleTypeDef hpcd_USB_FS;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_USB_PCD_Init(void);
/* USER CODE BEGIN PFP */
typedef void (*pFunction)(void);
static void jump_app(void)
{
  pFunction JumpToApplication;
  uint32_t JumpAddress;

  if (((*(__IO uint32_t *)USBD_DFU_APP_DEFAULT_ADD) & 0x2FFFB000) == 0x20000000)
  {
    /* Jump to user application */
    /*!< Jump to app reset_handler */
    JumpAddress = *(__IO uint32_t *)(USBD_DFU_APP_DEFAULT_ADD + 4);
    JumpToApplication = (pFunction)JumpAddress;

    /* Initialize user application's Stack Pointer */
    __set_MSP(*(__IO uint32_t *)USBD_DFU_APP_DEFAULT_ADD);
    JumpToApplication();
  }
}
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
int fputc(int ch, FILE *f)
{
    while ((USART1->SR & USART_SR_TXE) == 0)
        ;
    USART1->DR = ch;
    return ch;
}

void usb_dc_low_level_init(void)
{
    /* Peripheral clock enable */
    __HAL_RCC_USB_CLK_ENABLE();
    /* USB interrupt Init */
    HAL_NVIC_SetPriority(USB_LP_CAN1_RX0_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);

}

uint8_t *dfu_read_flash(uint8_t *src, uint8_t *dest, uint32_t len)
{
  uint32_t i = 0;
  uint8_t *psrc = src;

  for (i = 0; i < len; i++)
  {
    dest[i] = *psrc++;
  }
  /* Return a valid address to avoid HardFault */
  return (uint8_t *)(dest);
}

uint16_t dfu_write_flash(uint8_t *src, uint8_t *dest, uint32_t len)
{
  HAL_FLASH_Unlock();
  uint32_t i = 0;

  for (i = 0; i < len; i += 4)
  {
    /* Device voltage range supposed to be [2.7V to 3.6V], the operation will
     * be done by byte */
    if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, (uint32_t)(dest + i),
                          *(uint32_t *)(src + i)) == HAL_OK)
    {
      /* Check the written value */
      if (*(uint32_t *)(src + i) != *(uint32_t *)(dest + i))
      {
        /* Flash content doesn't match SRAM content */
        return (1);
      }
    }
    else
    {
      /* Error occurred while writing data in Flash memory */
      return (2);
    }
  }
  return 0;
}

uint16_t dfu_erase_flash(uint32_t add)
{
  HAL_FLASH_Unlock();
  uint32_t PageError;
  /* Variable contains Flash operation status */
  HAL_StatusTypeDef status;
  FLASH_EraseInitTypeDef eraseinitstruct;

  eraseinitstruct.TypeErase = FLASH_TYPEERASE_PAGES;
  eraseinitstruct.PageAddress = add;
  eraseinitstruct.NbPages = 1U;
  status = HAL_FLASHEx_Erase(&eraseinitstruct, &PageError);
  return 0;
}

void dfu_leave(void)
{
  NVIC_SystemReset();
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  jump_app();
  /* 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_USART1_UART_Init();
  //MX_USB_PCD_Init();
  /* USER CODE BEGIN 2 */


//    extern void cdc_acm_msc_init(void);
//    cdc_acm_msc_init();
    extern void dfu_flash_init(void);
		dfu_flash_init();

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
    while (1) {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
//        extern void cdc_acm_data_send_with_dtr_test(void);
//        cdc_acm_data_send_with_dtr_test();
//        HAL_Delay(100);
    }
  /* 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 PeriphClkInit = {0};

  /** 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.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  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_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

/**
  * @brief USB Initialization Function
  * @param None
  * @retval None
  */
static void MX_USB_PCD_Init(void)
{

  /* USER CODE BEGIN USB_Init 0 */

  /* USER CODE END USB_Init 0 */

  /* USER CODE BEGIN USB_Init 1 */

  /* USER CODE END USB_Init 1 */
  hpcd_USB_FS.Instance = USB;
  hpcd_USB_FS.Init.dev_endpoints = 8;
  hpcd_USB_FS.Init.speed = PCD_SPEED_FULL;
  hpcd_USB_FS.Init.low_power_enable = DISABLE;
  hpcd_USB_FS.Init.lpm_enable = DISABLE;
  hpcd_USB_FS.Init.battery_charging_enable = DISABLE;
  if (HAL_PCD_Init(&hpcd_USB_FS) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USB_Init 2 */

  /* USER CODE END USB_Init 2 */

}

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

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOD_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 */
    __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****/