STM32远程升级基本思路

#define FLASH_MAX_ADDR                      (0x0803FFFFU)  //MCU的Flash最大地址



#ifndef FLASH_PAGE_SIZE

  #define FLASH_PAGE_SIZE                   (0x800U)       //MCU的Flash的页大小，大容量的为2K，其他是1K

#endif



#define APP_BASEADDR                        (0x08004000U)  //升级程序地址





#define APP_PAGE_NUM                        ((FLASH_MAX_ADDR-APP_BASEADDR)/FLASH_PAGE_SIZE+1)



#define SPIFLASHBUF_MAX_LEN                 (0x1000U)  //spi flash最大缓冲4096字节

void JumpToApplication(void)

{

  typedef  void (*pFunction)(void);

  pFunction Jump_To_Application;

  u32 JumpAddress;    

  

  /* Test if user code is programmed starting from address "ApplicationAddress" */

  if (((*(__IO uint32_t*)APP_BASEADDR) & 0x2FFE0000 ) == 0x20000000)

  {

    

    DBG_LOG("----[Boot]Jump to Application!!!\r\n");

    LED_ALL_OFF();

    __disable_irq();

    

    /* Jump to user application */

    JumpAddress = *(__IO uint32_t*) (APP_BASEADDR + 4);

    Jump_To_Application = (pFunction) JumpAddress;

    /* Initialize user application's Stack Pointer */

    __set_MSP(*(__IO uint32_t*) APP_BASEADDR);

    Jump_To_Application();

  }

  else

  {

    DBG_LOG("----[Boot]Application Address is ERROR!!!\r\n");

    LED_ALL_ON();

  }    

}



union {

  u32 stm32[SPIFLASHBUF_MAX_LEN/4];

  u8  spi[SPIFLASHBUF_MAX_LEN];

}Flash;



void Boot_Initializes(void)

{



  u16 i,j;

  

  u32 update_file_mark;

  

  u32 writeFlashData;

 

  HAL_StatusTypeDef status;

  

  FLASH_EraseInitTypeDef f;

  

        f.TypeErase = FLASH_TYPEERASE_PAGES;

        f.PageAddress = APP_BASEADDR;

        f.NbPages = APP_PAGE_NUM;



  //1.判断spi flash DFU区是否有文件需要升级

  SFlash_Read(SECTOR_ADDR(SECTOR_DFU_START),(u8 *)&update_file_mark,4);

  

  if(update_file_mark == 0xFFFFFFFF){

    DBG_LOG("[Boot] No Firmware Need to Update."); 

    LED_ON(ERR);

    JumpToApplication();

    return;

  }

  //有文件需要升级

  DBG_LOG("[Boot] New Firmware Exist! Update Beginning..."); 

  

  //2.Flash解锁

  status = HAL_FLASH_Unlock();

  

  if(status != HAL_OK){

    DBG_LOG("[Boot] FLASH Unlock Failed."); 

    LED_ON(ERR);

    return;

  }

  DBG_LOG("[Boot] FLASH Unlock Ok."); 

  

  DBG_LOG("[Boot] Ready to Erase Flash ..."); 

  //3.擦除Flash

  status = HAL_FLASHEx_Erase(&f,&writeFlashData);

  

  if(status != HAL_OK){

    DBG_LOG("[Boot] Flash Erase Failed."); 

    LED_ON(ERR);

    return;

  }

  DBG_LOG("[Boot] Flash Erase OK."); 

  

  

  //4.从SPIFlash中读出数据然后copy到内部Flash中

  for(i = 0;i < (APP_PAGE_NUM / 2);i++){

    

    SFlash_Read(SECTOR_ADDR(SECTOR_DFU_START) + SPIFLASHBUF_MAX_LEN*i, Flash.spi, SPIFLASHBUF_MAX_LEN);

    

    DBG_LOG("[Boot] Write Flash Progress:%d%%",(i*100/(APP_PAGE_NUM / 2)) ); 

    

    LED_TOGGLE(WIFI);

    

    for(j = 0;j < (SPIFLASHBUF_MAX_LEN/4);j++){

      //注意基地址是在变化的

      HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, APP_BASEADDR+SPIFLASHBUF_MAX_LEN*i+4*j, Flash.stm32[j]);

    }    

  }

  

  DBG_LOG("[Boot] Write Flash Progress:100%%");

  DBG_LOG("[Boot] Program Complete!!!");

  

  //5.Flash上锁

  HAL_FLASH_Lock();  

  

  //6.跳转到用户程序区

  JumpToApplication();

  

}