STM32f103 —— 内部flash读写

#ifndef _MCU_FLASH_H_
#define _MCU_FLASH_H_

#include 

// STM32f103C8T6 64KB FLASH，20KB RAM，1个扇区1KB,程序起始0x8000000
#define FLASH_START_ADDR    ((uint32_t)0x8000000)
#define FLASH_END_ADDR      ((uint32_t)(0x8000000 + FLASH_SECTOR_NUM * FLASH_SECTOR_SIZE))
#define FLASH_SECTOR_NUM    128  // 扇区数量
#define FLASH_SECTOR_SIZE   1024 // 扇区大小1KB

typedef enum
{ 
  FLASH_FAILURE = 0,
  FLASH_SUCCESS,
} flash_status_t;

//===========================================================================
flash_status_t FlashErase(uint32_t addr, uint8_t count);
uint32_t FlashWrite(uint32_t addr, uint8_t *buffer, uint32_t length);
uint32_t FlashRead(uint32_t addr, uint8_t *buffer, uint32_t length);

#endif /* _MCU_FLASH_H_ */

 

#include "mcu_flash.h"
#include 
#include "stm32f10x_flash.h"

// addr:地址  count:块数量
flash_status_t FlashErase(uint32_t addr, uint8_t count)
{
  uint8_t i;

  FLASH_Unlock();

  FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR);

  for(i = 0; i < count; ++i)
  {
    if(FLASH_ErasePage(addr + i * FLASH_SECTOR_SIZE) != FLASH_COMPLETE)
    {
      return FLASH_FAILURE;
    }
  }

  FLASH_Lock();

  return FLASH_SUCCESS;
}

uint32_t FlashWrite(uint32_t addr, uint8_t *buffer, uint32_t length)
{
  uint16_t i, data = 0;

  FLASH_Unlock();

  FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR);

  for(i = 0; i < length; i += 2)
  {
    data = (*(buffer + i + 1) << 8) + (*(buffer + i));
    if(FLASH_ProgramHalfWord((uint32_t)(addr + i), data) != FLASH_COMPLETE)
    {
      return i;
    }
  }
  
  FLASH_Lock();

  return length;
}

uint32_t FlashRead(uint32_t addr, uint8_t *buffer, uint32_t length)
{
  memcpy(buffer, (void *)addr, length);

  return length;
}