code-stm32读写FLASH

Posted 2022-11-08

#define FLASH_TYPEERASE_PAGES   ( (uint32_t) 0x00)      /*!<Pages erase only*/
#define FLASH_TYPEERASE_MASSERASE ( (uint32_t) 0x02)      /*!<Flash mass erase activation*/
#define FLASH_BANK_1      ( (uint32_t) 0)         /*!< Bank 1   */
#define FLASH_TYPEPROGRAM_HALFWORD  ( (uint32_t) 0x01)      /*!<Program a half-word (16-bit) at a specified address.*/

u16 u8ConvertU16( u8 a, u8 b )

  u16 res = a << 8 | b;
  return(res);



void erasePage( u32 pageStartAddress, u32 pageNum )

  FLASH_EraseInitTypeDef  eraseInit;
  u32     error;
  eraseInit.TypeErase = FLASH_TYPEERASE_PAGES;
  /* eraseInit.Banks = FLASH_BANK_1; */
  eraseInit.NbPages = pageNum;
  eraseInit.PageAddress = pageStartAddress;
  if ( HAL_FLASHEx_Erase( &eraseInit, &error ) == HAL_OK )
  
  



u32 writeFlash( u8 *pSourceData, u32 targetAddress, u32 len )

  HAL_FLASH_Unlock();
  u32 writeData;
  for ( u32 i = 0; i < len; i = i + 2 )
  
    if ( targetAddress % 1024 == 0 )
    
      erasePage( targetAddress, 1 );
    
    writeData = u8ConvertU16( pSourceData[i + 1], pSourceData[i] );
    if ( HAL_FLASH_Program( FLASH_TYPEPROGRAM_HALFWORD, targetAddress, writeData ) != HAL_OK )
    
    
    targetAddress += 2;
  
  HAL_FLASH_Lock();
  return(targetAddress);



u32 writeU16ToFlash( u16* pSourceData, u32 targetAddress, u32 len )

  HAL_FLASH_Unlock();
  u32 writeData;
  for ( u32 i = 0; i < len; i = i + 2 )
  
    if ( targetAddress % 1024 == 0 )
    
      erasePage( targetAddress, 1 );
    
    writeData = (*pSourceData) & 0xffff;
    if ( HAL_FLASH_Program( FLASH_TYPEPROGRAM_HALFWORD, targetAddress, writeData ) != HAL_OK )
    
    
    targetAddress += 2;
  
  HAL_FLASH_Lock();
  return(targetAddress);




示例：


#define USER_DATA_BASE 0x800A000 

void setLevelValue( u8 level, u8* u8Arr )

  u8  page[1024]  =  0 ;
  u8  i   = 0;

  /* 拷贝值 */
  for ( i = 0; i < 16; i++ )
  
    page[i] = *(u32 *) (USER_DATA_BASE + i) & 0xff;
  

  erasePage( USER_DATA_BASE, 1 );

  writeFlash( page, USER_DATA_BASE, 16 );

  __set_FAULTMASK( 1 );
  NVIC_SystemReset();