/**
  ******************************************************************************
  * File Name          : Flash.c
  * Description        : This file provides code for the configuration
  *                      of the USART instances.
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2019 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions 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 its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 "Flash.h"
#include "uart_process.h"

FLASH_EraseInitTypeDef CDLPropertiesEraseInitStruct;
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

void FLASH_Init(void)
{	
	uint8_t reset_count = 0;
	
  /*CDL属性区擦除结构体初始化*/	
	CDLPropertiesEraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
  CDLPropertiesEraseInitStruct.PageAddress = CDLPROPERTIES_AREA_ADDRESS;
  CDLPropertiesEraseInitStruct.NbPages = (CDLPROPERTIES_AREA_END_ADDRESS - CDLPROPERTIES_AREA_ADDRESS+1)/FLASH_PAGE_SIZE;
	
	Transmit_UARTOrCAN = (uint8_t)FLASH_Read(CDLPROPERTIES_AREA_ADDRESS, 1);
	Uart_BootBaudrate = FLASH_Read(CDLPROPERTIES_AREA_ADDRESS+4, 1);
	Uart_AppBaudrate = FLASH_Read(CDLPROPERTIES_AREA_ADDRESS+8, 1);
	CAN_Baudrate = FLASH_Read(CDLPROPERTIES_AREA_ADDRESS+12, 1);
	HandingFlag_Enable = FLASH_Read(CDLPROPERTIES_AREA_ADDRESS+16, 1);
	
	if(Transmit_UARTOrCAN == 0xFF)
	{
			Transmit_UARTOrCAN = 1;
			reset_count++;
	}
	if(Uart_BootBaudrate == 0xFFFFFFFF)
	{
			Uart_BootBaudrate = 57600;
			reset_count++;
	}
	if(Uart_AppBaudrate == 0xFFFFFFFF)
	{
			Uart_AppBaudrate = 9600;
			reset_count++;
	}
	if(CAN_Baudrate == 0xFFFFFFFF)
	{
			CAN_Baudrate = 250;
			reset_count++;
	}
	
	if(reset_count > 0)
	{
			FLASH_WriteCDLProperties(CDLPROPERTIES_AREA_ADDRESS);
	}
}

uint32_t FLASH_FLASHEx_Erase(FLASH_EraseInitTypeDef *pEraseInit)
{
	uint32_t PageError;  
  if (HAL_FLASHEx_Erase(pEraseInit, &PageError) != HAL_OK)
  {
      /* Error occurred while page erase */
     return (1);
  }  
  return (0);
}

uint32_t FLASH_Read(uint32_t Address, uint16_t DataLength)
{
	static uint32_t data32 = 0xFFFFF000;
	
	for (uint16_t i = 0; (i < DataLength) && (Address <= (FLASH_END_ADDRESS-4)); i++)
  {	
    data32 = *(__IO uint32_t *)Address;   
    Address = Address + 4;	
  }	
	return data32;
}

uint32_t FLASH_WriteCDLProperties(uint32_t Address)
{
  uint32_t i = 0;
	uint32_t Data[5];
	uint16_t DataLength;

  /* Unlock the Flash to enable the flash control register access *************/
  HAL_FLASH_Unlock();
	
	__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPERR);
	
	FLASH_FLASHEx_Erase(&CDLPropertiesEraseInitStruct);		
	
	HAL_Delay(200);
	DataLength = 5;
	Data[0] = Transmit_UARTOrCAN;
	Data[1] = Uart_BootBaudrate;
	Data[2] = Uart_AppBaudrate;
	Data[3] = CAN_Baudrate;
	Data[4] = HandingFlag_Enable;

  for (i = 0; (i < DataLength) && (Address <= (FLASH_END_ADDRESS-4)); i++)
  {
    /* Device voltage range supposed to be [2.7V to 3.6V], the operation will
       be done by word */    
    if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, *(uint32_t*)(Data+i)) == HAL_OK)      
    {
     /* Check the written value */
//      if (*(uint32_t*)FlashAddress != *(uint16_t*)(Data+i))
//      {
//        /* Flash content doesn't match SRAM content */
//        return(1);
//      }
      /* Increment FLASH destination address */
      Address += 4;
    }
    else
    {
      /* Error occurred while writing data in Flash memory */
      return (1);
    }
  }

  /* Lock the Flash to disable the flash control register access (recommended
     to protect the FLASH memory against possible unwanted operation) *********/
  HAL_FLASH_Lock();

  return (0);
}

/* USER CODE END 1 */

/**
  * @}
  */

/**
  * @}
  */

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