2019年07月26日 | STM32 flash读写源程序

/**

  ******************************************************************************

  * File Name          : FLASH.c 

  * Description        : read and program the stm32's  flash from address   

  * Author             :  Yelsin

  * Version            : V1.0.0

  * Date               : 11-Jan-2015

  * COPYRIGHT(c) 2015.  All Right Reserved 

  ******************************************************************************

  */

/* Includes ------------------------------------------------------------------*/

#include "flash.h"

#include "main.h"

/* Private define ------------------------------------------------------------*/

#define FLASH_USER_START_ADDR   ADDR_FLASH_PAGE_60   /*  Start @ of user Flash area */

#define FLASH_USER_END_ADDR     ADDR_FLASH_PAGE_61 + FLASH_PAGE_SIZE   /* End @ of user Flash area */

#define DATA_32                 ((uint32_t)0x12345678)

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

uint32_t Address = 0, PageError = 0;

__IO uint32_t data32 = 0 , MemoryProgramStatus = 0;

/*Variable used for Erase procedure*/

static FLASH_EraseInitTypeDef EraseInitStruct;

/* Private function prototypes -----------------------------------------------*/

//static void Error_Handler(void);

/* Private functions ---------------------------------------------------------*/

/*Read halfword-16 bit data from flash address */

uint16_t FLASH_ReadHalfWord(uint32_t address)

{

  return *(__IO uint16_t*)address;  

}

/*Read WORD-32 bit data from flash address */

uint32_t FLASH_ReadWord(uint32_t address)

{

  uint32_t temp1,temp2;

  temp1=*(__IO uint16_t*)address; 

  temp2=*(__IO uint16_t*)(address+2); 

  return (temp2<<16)+temp1;

}

/*Read Multi half-WORD 16 bit data from flash address */

void FLASH_ReadMoreData(uint32_t startAddress,uint16_t *readData,uint16_t countToRead)

{

  uint16_t dataIndex;

  for(dataIndex=0;dataIndex  {

    readData[dataIndex]=FLASH_ReadHalfWord(startAddress+dataIndex*2);

  }

}

/**

  * @brief  Factory Setting Recover Read Flash after power on

  * @param  start Addr 

  * @retval None

  */

void FactorySettingRecover(void) 

{

  uint8_t i;

  Address = FLASH_USER_START_ADDR;

  for (i=0; i  {    

  GLOBALVARS[i]= FLASH_ReadWord(Address );

  Address = Address + 4;  

  }

  if(GLOBALVARS[PARAM_MODIFIED] == 0x55)

  {

  fDVBType        = GLOBALVARS[DVBTYPE]  ;

  fRFBandwidth        = GLOBALVARS[BANDWITH] ; 

  }

}

/**

  * @brief   Flash write function

  * @param  start area address 

  * @retval None

  */

void FLASH_Write(uint32_t WriteAddr,uint32_t *Buffer,uint16_t NumberToWrite)  

{

  uint8_t i;

   /* Unlock the Flash to enable the flash control register access *************/

  HAL_FLASH_Unlock();

  /* Erase the user Flash area

    (area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/

  /* Fill EraseInit structure*/

  EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;

  EraseInitStruct.PageAddress = FLASH_USER_START_ADDR;

  EraseInitStruct.NbPages = (FLASH_USER_END_ADDR - FLASH_USER_START_ADDR) / FLASH_PAGE_SIZE;

  if (HAL_FLASHEx_Erase(&EraseInitStruct, &PageError) != HAL_OK)

  {

    /*

      Error occurred while page erase.

      to know the code error , call 'HAL_FLASH_GetError()'

    */

  }

  for (i=0; i  {

    if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, WriteAddr, Buffer[i]) == HAL_OK)

    {

      WriteAddr = WriteAddr + 4;

    }

    else

    {

      /* Error occurred while writing data in Flash */

    }

  }

  /* Lock the Flash to disable the flash control register access (recommended

     to protect the FLASH memory against possible unwanted operation) *********/

  HAL_FLASH_Lock();

  /* Check if the programmed data is OK*/

 /* Address = FLASH_USER_START_ADDR;

  MemoryProgramStatus = 0x0;

  while (Address < FLASH_USER_END_ADDR)

  {

    data32 = *(__IO uint32_t *)Address;

    if (data32 != DATA_32)

    {

      MemoryProgramStatus++;

    }

    Address = Address + 4;

  }

  if (MemoryProgramStatus == 0)

  {

  }*/

}

/**

  * @brief  Save Factory Setting In Flash

  * @param  None

  * @retval None

  */

void SaveParameterInFlash(void)

{ 

  GLOBALVARS[DVBTYPE] = fDVBType;

  GLOBALVARS[PARAM_MODIFIED] = 0x55;

  Address = FLASH_USER_START_ADDR; 

  FLASH_Write(Address,GLOBALVARS,sizeof(GLOBALVARS)) ; 

}

/**

  * @brief  This function is executed in case of error occurrence.

  * @param  None

  * @retval None

  */

/*static void Error_Handler(void)

{

  { 

    printf("n flash Err.");

  }

}*/

#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 can add his own implementation to report the file name and line number,

     ex: printf("Wrong parameters value: file %s on line %drn", file, line) */

  /* Infinite loop */

  //while (1)

  {

  }

}

#endif

/**

  * @}

  */