/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * Copyright (c) 2017 STMicroelectronics International N.V. 
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without 
  * modification, are permitted, provided that the following conditions are met:
  *
  * 1. Redistribution of source code must retain the above copyright notice, 
  *    this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. Neither the name of STMicroelectronics nor the names of other 
  *    contributors to this software may be used to endorse or promote products 
  *    derived from this software without specific written permission.
  * 4. This software, including modifications and/or derivative works of this 
  *    software, must execute solely and exclusively on microcontroller or
  *    microprocessor devices manufactured by or for STMicroelectronics.
  * 5. Redistribution and use of this software other than as permitted under 
  *    this license is void and will automatically terminate your rights under 
  *    this license. 
  *
  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
  * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/
#include "stm32f3xx_hal.h"
#include "usb_device.h"
#include "f3hw.h"

/* USER CODE BEGIN Includes */
#include "version.h"
/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/
CRC_HandleTypeDef hcrc;

RTC_HandleTypeDef hrtc;

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_CRC_Init(void);
static void MX_RTC_Init(void);

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */
//TODO: also defined in usbd_conf.h and usbd_dfu_if.c
#define APP_START 0x08004000
#define APP_END 0x08020000
#define APP_RANGE_VALID(a, s) (!(((a) | (s)) & 3) && (a) >= APP_START && ((a) + (s)) <= APP_END)
#define VERSION_INFO_OFFSET 0x188
static volatile const struct version_info *app_info = (void *)(APP_START + VERSION_INFO_OFFSET);

static int app_ok(void) {
  if(!APP_RANGE_VALID(APP_START, app_info->image_size)) {
    return 0;
  }
  uint32_t crc = HAL_CRC_Calculate(&hcrc, (uint32_t *)APP_START, app_info->image_size / 4);

  if(crc != 0) {
    return 0;
  }
  return 1;
}
/* USER CODE END 0 */

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();

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

  // __HAL_RCC_GPIOA_CLK_ENABLE();
  // GPIO_InitTypeDef GPIO_InitStruct;
  // GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_12;
  // GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  // GPIO_InitStruct.Pull = GPIO_NOPULL;
  // GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  // HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  // HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET);
  // HAL_GPIO_WritePin(GPIOA, GPIO_PIN_12, GPIO_PIN_RESET);
  // HAL_Delay(500);

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USB_DEVICE_Init();
  MX_CRC_Init();
  MX_RTC_Init();

  GPIO_InitTypeDef GPIO_InitStruct;

#ifdef USB_DISCONNECT_PIN
  GPIO_InitStruct.Pin   = USB_DISCONNECT_PIN;
  GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull  = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(USB_DISCONNECT_PORT, &GPIO_InitStruct);
  HAL_GPIO_WritePin(USB_DISCONNECT_PORT, USB_DISCONNECT_PIN, GPIO_PIN_RESET);
#endif

#ifdef USB_CONNECT_PIN
  GPIO_InitStruct.Pin   = USB_CONNECT_PIN;
  GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull  = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(USB_CONNECT_PORT, &GPIO_InitStruct);
  HAL_GPIO_WritePin(USB_CONNECT_PORT, USB_CONNECT_PIN, GPIO_PIN_SET);
#endif

  /* USER CODE BEGIN 2 */
  if(app_ok() && RTC->BKP0R == 0x00000000) {
    // SCB->VTOR = APP_START;
    /* Jump to user application */
    void (*JumpToApplication)(void);
    uint32_t JumpAddress = *(__IO uint32_t *)(USBD_DFU_APP_DEFAULT_ADD + 4);
    JumpToApplication    = (void *)JumpAddress;

    /* Initialize user application's Stack Pointer */
    __set_MSP(*(__IO uint32_t *)USBD_DFU_APP_DEFAULT_ADD);
#ifdef USB_DISCONNECT_PIN
    HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
    HAL_Delay(100);
#endif
    JumpToApplication();
    while(1)
      ;
  }
  RTC->BKP0R = 0x00000000;
  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(50);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(50);
  }
  /* USER CODE END 3 */
}

/** System Clock Configuration
*/
void SystemClock_Config(void) {
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInit;

  /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState       = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState       = RCC_HSI_ON;
  RCC_OscInitStruct.LSIState       = RCC_LSI_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 busses 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 | RCC_PERIPHCLK_RTC;
  PeriphClkInit.RTCClockSelection    = RCC_RTCCLKSOURCE_LSI;
  PeriphClkInit.USBClockSelection    = RCC_USBCLKSOURCE_PLL_DIV1_5;
  if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
    Error_Handler();
  }

  /**Configure the Systick interrupt time 
    */
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / 1000);

  /**Configure the Systick 
    */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

/* CRC init function */
static void MX_CRC_Init(void) {
  hcrc.Instance                     = CRC;
  hcrc.Init.DefaultPolynomialUse    = DEFAULT_POLYNOMIAL_ENABLE;
  hcrc.Init.DefaultInitValueUse     = DEFAULT_INIT_VALUE_ENABLE;
  hcrc.Init.InputDataInversionMode  = CRC_INPUTDATA_INVERSION_NONE;
  hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;
  hcrc.InputDataFormat              = CRC_INPUTDATA_FORMAT_WORDS;
  if(HAL_CRC_Init(&hcrc) != HAL_OK) {
    Error_Handler();
  }
}

/* RTC init function */
static void MX_RTC_Init(void) {
  /**Initialize RTC Only 
    */
  hrtc.Instance            = RTC;
  hrtc.Init.HourFormat     = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv   = 127;
  hrtc.Init.SynchPrediv    = 255;
  hrtc.Init.OutPut         = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType     = RTC_OUTPUT_TYPE_OPENDRAIN;
  if(HAL_RTC_Init(&hrtc) != HAL_OK) {
    Error_Handler();
  }
}

/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
static void MX_GPIO_Init(void) {
  GPIO_InitTypeDef GPIO_InitStruct;

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

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);

  /*Configure GPIO pin : LED_PIN */
  GPIO_InitStruct.Pin   = LED_PIN;
  GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull  = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void) {
  /* USER CODE BEGIN Error_Handler */
  /* User can add his own implementation to report the HAL error return state */
  while(1) {
  }
  /* USER CODE END Error_Handler */
}

#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

/**
  * @}
  */

/**
  * @}
*/

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