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{{AppliesToLizard}}
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== Introduction ==This article describe how to recover a corrupted U-Boot image on Lizard NOR Flash using a Windows host machine. In brief user needs to:* configure Lizard SOM to boot over serial port instead of on board NOR flash* download and prepare serial communication tools* use those tools to download first stage bootloader and U-Boot over UART* use this U-Boot to update NOR flashThis assume that you'''Flashing the firmware'''re using a standard [[Lizard Embedded Linux Kit (LELK)|LELK]] hardware and software.
== Tool Preparation ==* Download the [[mirror:lizard/recovery/lizard-recovery.zip|lizard-recovery.zip archive]] and extract it on your Windows PC * If everithing was set correctlyneeded, this message should appear on replace the u-boot.bin file with your screencustom binary or download the latest LELK binary from [[mirror:lizard|DAVE Embedded Systems mirror]] * Open the command prompt and go inside the folder where you extracted the recovery file* Launch the utility with the serial port number as the argument
<pre>
C:\Users\Desktop\lizard-Recovery\lizard> .\uart-recovery.bat COM1
</pre>The tools is now waiting for the board to wakeup
== Board Preparation ==
* Power off the board and set the dip switch <code>S2.2 ON</code> to select serial boot
* Connect '''UART2''' to your host PC
* Turn on the board
== Flashing the firmware ==
Once the board boot up, after a couple of seconds of delay, the recovery procedure will start.
The script is totally automated and, in case of success, this is the output:
<pre>
C:\devel\lizard\recovery2\windows>uart-recovery.bat COM15
transfer the x-loader
Waiting For Device ASIC ID: Press Ctrl+C to stop
ASIC ID Detected.
Sending 2ndFile:
Downloading file: 100.000% completed(15232/15232 bytes)
File download completed.
transfer u-boot
Downloading file: 100.000% completed(221852/221852 bytes)
File Download completed
trasfer u-boot to be stored on flash
C:\devel\lizard\recovery2\windows>ucmd -p COM15 -c "mw.w ${buf} 0xFF 0x40000; loadb ${buf} 115200" -e "Ready for binary"
Output:
mw.w ${buf} 0xFF 0x40000; loadb ${buf} 115200
## Ready for binary
Match Found. Operation completed!
Downloading file: 100.000% completed(221852/221852 bytes)
File Download completed
flashing u-boot
</pre>
User can now:* Turn turn off the board.* Change the sweetch position to reflect the restore original onedip switch configuration <code>S2.2 OFF</code>* Turn power on the board.again to see the restored U-Boot startup
