1. uint16_tMEM_If_Init_HS(void)
   {
   HAL_FLASH_Unlock();
   return(USBD_OK);
   }
   

   Flash 上鎖

   uint16_tMEM_If_DeInit_HS(void)
   {
   HAL_FLASH_Lock();
   return(USBD_OK);
   }
   

   Flash 擦除

   staticuint32_tGetSector(uint32_tAddress)
   {
   uint32_tsector=0;
   
   if((Address=ADDR_FLASH_SECTOR_0))
   {
   sector=FLASH_SECTOR_0;
   }
   
   ......
   
   }
   elseif((Address=ADDR_FLASH_SECTOR_22))
   {
   sector=FLASH_SECTOR_22;
   }
   else
   {
   sector=FLASH_SECTOR_23;
   }
   returnsector;
   }
   
   uint16_tMEM_If_Erase_HS(uint32_tAdd)
   {
   uint32_tstartsector=0;
   uint32_tsectornb=0;
   /*VariablecontainsFlashoperationstatus*/
   HAL_StatusTypeDefstatus;
   FLASH_EraseInitTypeDeferaseinitstruct;
   
   /*Getthenumberofsector*/
   startsector=GetSector(Add);
   
   eraseinitstruct.TypeErase=FLASH_TYPEERASE_SECTORS;
   eraseinitstruct.VoltageRange=FLASH_VOLTAGE_RANGE_3;
   eraseinitstruct.Sector=startsector;
   eraseinitstruct.NbSectors=1;
   status=HAL_FLASHEx_Erase(&eraseinitstruct,§ornb);
   
   if(status!=HAL_OK)
   {
   return(USBD_FAIL);
   }
   return(USBD_OK);
   }
   

   Flash 寫入

   uint16_tMEM_If_Write_HS(uint8_t*src,uint8_t*dest,uint32_tLen)
   {
   uint32_ti=0;
   
   for(i=0;i4)
   {
   /*Devicevoltagerangesupposedtobe[2.7Vto3.6V],theoperationwill
   bedonebybyte*/
   if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD,(uint32_t)(dest+i),*(uint32_t*)(src+i))==HAL_OK)
   {
   /*Checkthewrittenvalue*/
   if(*(uint32_t*)(src+i)!=*(uint32_t*)(dest+i))
   {
   /*Flashcontentdoesn'tmatchSRAMcontent*/
   return(USBD_FAIL);
   }
   }
   else
   {
   /*ErroroccurredwhilewritingdatainFlashmemory*/
   return(USBD_FAIL);
   }
   }
   return(USBD_OK);
   }
   

   Flash 讀取

   uint8_t*MEM_If_Read_HS(uint8_t*src,uint8_t*dest,uint32_tLen)
   {
   /*ReturnavalidaddresstoavoidHardFault*/
   uint32_ti=0;
   uint8_t*psrc=src;
   
   for(i=0;i/*ReturnavalidaddresstoavoidHardFault*/
   return(uint8_t*)(dest);
   }
   

   獲取 Flash 擦寫時(shí)間參數(shù)

   uint16_tMEM_If_GetStatus_HS(uint32_tAdd,uint8_tCmd,uint8_t*buffer)
   {
   /*USERCODEBEGIN11*/
   uint16_ttime;
   
   time=TimingTable[GetSector(Add)];
   
   switch(Cmd)
   {
   caseDFU_MEDIA_PROGRAM:
   buffer[1]=(uint8_t)time;
   buffer[2]=(uint8_t)(time<8);
   buffer[3]=0;
   break;
   
   caseDFU_MEDIA_ERASE:
   default:
   buffer[1]=(uint8_t)time;
   buffer[2]=(uint8_t)(time<8);
   buffer[3]=0;
   break;
   }
   return(USBD_OK);
   /*USERCODEEND11*/
   }
   

   usbd_dfu_if.h 文件添加的宏定義

   /*Defineflashaddress*///BLANK1#defineADDR_FLASH_SECTOR_00x08000000#defineADDR_FLASH_SECTOR_10x08004000#defineADDR_FLASH_SECTOR_20x08008000#defineADDR_FLASH_SECTOR_30x0800C000#defineADDR_FLASH_SECTOR_40x08010000#defineADDR_FLASH_SECTOR_50x08020000#defineADDR_FLASH_SECTOR_60x08040000#defineADDR_FLASH_SECTOR_70x08060000#defineADDR_FLASH_SECTOR_80x08080000#defineADDR_FLASH_SECTOR_90x080A0000#defineADDR_FLASH_SECTOR_100x080C0000#defineADDR_FLASH_SECTOR_110x080E0000//BLANK2#defineADDR_FLASH_SECTOR_120x08100000#defineADDR_FLASH_SECTOR_130x08104000#defineADDR_FLASH_SECTOR_140x08108000#defineADDR_FLASH_SECTOR_150x0810C000#defineADDR_FLASH_SECTOR_160x08110000#defineADDR_FLASH_SECTOR_170x08120000#defineADDR_FLASH_SECTOR_180x08140000#defineADDR_FLASH_SECTOR_190x08160000#defineADDR_FLASH_SECTOR_200x08180000#defineADDR_FLASH_SECTOR_210x081A0000#defineADDR_FLASH_SECTOR_220x081C0000#defineADDR_FLASH_SECTOR_230x081E0000/*Flashopratetimefromdatasheetpage128*/#defineFLASH_SECTOR_16KB_WRITE_ERASE_TIME500//500usbframe,means500ms#defineFLASH_SECTOR_64KB_WRITE_ERASE_TIME1100#defineFLASH_SECTOR_128KB_WRITE_ERASE_TIME2000

2. 修改Main文件

   首先在main文件前添加幾個(gè)用于加載APP程序的變量和函數(shù)定義

   typedefvoid(*pFunction)(void);
   
   pFunctionJumpToApplication;
   uint32_tJumpAddress;1234

   然后再 main 函數(shù)中加入 外部按鍵的判斷、APP程序加載以及USB DFU初始化功能

   intmain(void)
   {
   /*Resetofallperipherals,InitializestheFlashinterfaceandtheSystick.*/
   HAL_Init();
   
   /*Configurethesystemclock*/
   SystemClock_Config();
   
   /*Initializeallconfiguredperipherals*/
   MX_GPIO_Init();
   
   if(HAL_GPIO_ReadPin(USER_BTN_GPIO_Port,USER_BTN_Pin)==GPIO_PIN_SET)
   {
   HAL_GPIO_WritePin(GPIOG,LD3_Pin,GPIO_PIN_SET);//Fordebug
   /*Testifusercodeisprogrammedstartingfromaddress0x0800C000*/
   if(((*(__IOuint32_t*)USBD_DFU_APP_DEFAULT_ADD)&0x2FF80000)==0x20000000)
   {
   HAL_GPIO_WritePin(GPIOG,LD4_Pin,GPIO_PIN_SET);//Fordebug
   /*Jumptouserapplication*/
   JumpAddress=*(__IOuint32_t*)(USBD_DFU_APP_DEFAULT_ADD+4);
   JumpToApplication=(pFunction)JumpAddress;
   
   /*Resetofallperipherals*/
   HAL_DeInit();
   
   /*Setinterruptvectortoappcode*/
   SCB->VTOR=USBD_DFU_APP_DEFAULT_ADD;
   
   /*Initializeuserapplication'sStackPointer*/
   __set_MSP(*(__IOuint32_t*)USBD_DFU_APP_DEFAULT_ADD);
   JumpToApplication();
   }
   }
   
   MX_USB_DEVICE_Init();
   
   while(1)
   {
   }
   }
   

編譯程序下載進(jìn)入單片機(jī)

使用DfuSe

從ST官網(wǎng)DfuSe的程序安裝包，并安裝。然后我們按下之前寫的觸發(fā)按鍵并復(fù)位單片機(jī)，讓單片機(jī)初始 USB DFU 功能，這時(shí)如果你插著單片機(jī)的USB線，系統(tǒng)應(yīng)該已經(jīng)識(shí)別了。如果沒有右鍵更新驅(qū)動(dòng)程序，手動(dòng)指定驅(qū)動(dòng)搜索路徑在DfuSe安裝目錄下的 BinDriver 內(nèi)。如果直接無法識(shí)別USB設(shè)備，建議在CubeMx配置完工程后就編譯下載測試一下，看看是不是你在移植過程中哪里寫錯(cuò)了。

然后我們需要生成一個(gè)地址設(shè)定在0x0800_c000后的測試程序，就先編寫一個(gè) Blink LED 的程序吧，生成bin、hex或S19文件。然后我們打開DfuSe軟件的Dfu file manager來生成DFU軟件用的.dfu格式的文件。選擇第一項(xiàng)，第二個(gè)是用來將.dfu反向變換回來的。大概的操作已經(jīng)標(biāo)在圖片上了，操作比較簡單就不做詳細(xì)介紹了，記得把Address的地址改到偏移后的地址上否則下載會(huì)出錯(cuò)，其他參數(shù)可以不用修改。

然后我們打開DfuSe程序，在Upgrade中選擇生成好的blink.dfu文件，勾選校驗(yàn)功能，下載程序。成功后復(fù)位單片機(jī)，LED開始閃爍，移植成功。

更多

仔細(xì)區(qū)看看DfuSe的安裝目錄，里面有DFU的資料文檔，還有DFU的工程源代碼，可以用來改寫自己需要的DFU升級(jí)程序。