按照官网提供的下面步骤 升级P-NUCLEO-WB55.USBDongle单板的FUS和无线协议栈后，单板在sw2 to boot0下，stm32cubeprogrammer选择usb模式无法再识别到DFU设备，感觉是FUS升级坏了。

有个疑问：按照介绍，stm32wb5x_FUS_fw.bin 是烧录在 0x080EC000位置，而stm32wb5x_BLE_Stack_fw.bin是烧录在0x080cb000位置，这两个位置之间相差0x21000，可是stm32wb5x_BLE_Stack_fw.bin文件的大小有160KB左右，这样烧录stm32wb5x_BLE_Stack_fw.bin时 不就会把FUS空间覆盖了吗？

• STEP 1: Use STM32CubeProgrammer
  
  
  • Version 2.0 or higher.
  • It gives access to Firmware Upgrade Service (FUS) (AN5185 : ST firmware upgrade services for STM32WB Series.) through Bootloader.
  • It is currently available as Command Line Interface (CLI) mode.
    
    
• STEP 2: Access to Bootloader USB Interface (system flash)
  
  
  • Boot mode selected by Boot0 pin set to VDD
    
    • For P-NUCLEO-WB55.Nucleo :
      
      • Jumper between CN7.5(VDD) and CN7.7(Boot0)
      • Power ON via USB_USER and Jumper JP1(USB_MCU)
        
    • For P-NUCLEO-WB55.USBDongle :
      
      • Move switch SW2 to Boot0
      • Connect P-NUCLEO-WB55.USBDongle
        
      
      
    
    
• STEP 3 : Delete current wireless stack :
  
  
  • STM32_Programmer_CLI.exe -c port=usb1 -fwdelete
    
• STEP 4 : Read and upgrade FUS Version
  
  • STM32_Programmer_CLI.exe -c port=usb1 -r32 0x20030030 1
    
    • 0x20030030 : 00050300 : FUSv0.5.3 => Must be updated using STEP 5.
    • 0x20030030 : 01000100 or 01000200 : FUSv1.0.x => Up to date, you can download the new wireless stack using STEP6.
      
    
    
• STEP 5 : Download new FUS :
  
  
  • STM32_Programmer_CLI.exe -c port=usb1 -fwupgrade [FUS_Binary] [Install@] firstinstall=0
    
  Please check Firmware Upgrade Services Binary Table for Install@ parameter depending of the binary.
• STEP 6 : Download new wireless stack :
  
  
  • STM32_Programmer_CLI.exe -c port=usb1 -fwupgrade [Wireless_Coprocessor_Binary] [Install@] firstinstall=1
    
  Please check Wireless Coprocessor Binary Table for Install@ parameter depending of the binary.
• STEP 7 : Revert STEP 2 procedure to put back device in normal mode.