For Windows

  1. Open Tera Term software.
  2. Navigate to Setup > Serial port... .
  3. Configure the settings as follows.
    • Port: COM4 (choose your COM port)
    • Speed: 9600
    Note: The Speed value is 9600. This setting is for recovering the bootloader, ddr init, and u-boot of QSPI Flash.
  4. Click on New open.
  5. Press the BOOT button while turning on VisionFive.
    Figure 1. Pressing the Boot Button
    press_boot_2.jpg
  6. You will see the following output on Tera Term.
    (C) SiFive
  7. Type the following. 
    load 0x18000000

    Result: You will see an output like this:
    Figure 2. Example Output
  8. Navigate to File > Transfer > XMODEM > Send... and choose the following file we downloaded before: JH7100_recovery_boot.bin.

    Result:

    You will see an output like this after the transfer is complete.

    Load file ok.
  9. Type the following.: 
    do 0x18000000
    Result:

    You will see an output like this:

    Figure 3. Example Output
  10. Type 0 and press Enter to update the bootloader.
  11. Navigate to File > File > Transfer > XMODEM > Send... and choose the following file from the .zip file we downloaded before: bootloader-JH7100-211102.bin.out
  12. Repeat the steps 10 to 11 to update the ddr init according to the following.
    • Type 1 - update ddr init [Filename: ddrinit-2133-211102.bin.out]