Difference between revisions of "Recovery U-Boot Image (Lizard)"

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{{AppliesToLizard}}
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{{AppliesToLizardEVB-Lite}}
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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 flash
 +
This assume that you're using a standard  [[Lizard Embedded Linux Kit (LELK)|LELK]] hardware and software.
  
 
== Tool Preparation ==
 
== Tool Preparation ==
−
* Download the zip archive lizard-Recovery.zip and extract it  
+
* Download the [[mirror:lizard/recovery/lizard-recovery.zip|lizard-recovery.zip archive]] and extract it on your Windows PC
 +
* If needed, replace the u-boot.bin file with your custom 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
 
* 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
 
* Launch the utility with the serial port number as the argument
 
<pre>
 
<pre>
 
C:\Users\Desktop\lizard-Recovery\lizard> .\uart-recovery.bat COM1
 
C:\Users\Desktop\lizard-Recovery\lizard> .\uart-recovery.bat COM1
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</pre>
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</pre>The tools is now waiting for the board to wakeup
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{{InfoBoxTop}}
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{{AppliesToLizard}}
 
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{{AppliesToLizardEVB-Lite}}
 
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{{InfoBoxBottom}}
 
 
== Board Preparation ==
 
== Board Preparation ==
−
* Power down the board and set the deep switch 2 1 configuration.
+
* Power off the board and set the dip switch <code>S2.2 ON</code> to select serial boot
−
* Connect the serial console to the <ode>PORT2 of your board.
+
* Connect '''UART2''' to your host PC
−
* Turn on the board.
+
* Turn on the board
  
 
== Flashing the firmware ==
 
== 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:
 +
  
−
If everything was set correctly, this message should appear on your screen
 
 
<pre>
 
<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.
 
ASIC ID Detected.
−
 
 
Sending 2ndFile:
 
Sending 2ndFile:
−
 
 
Downloading file: 100.000% completed(15232/15232 bytes)
 
Downloading file: 100.000% completed(15232/15232 bytes)
−
 
 
File download completed.
 
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
  
−
In attesa da 0 secondi. Premere un tasto per continuare...
+
Waiting for 0 seconds, press a key to continue ...
  
−
Downloading file: 100.000% completed(218792/218792 bytes)
+
C:\devel\lizard\recovery2\windows>ucmd -p COM15 -c "STOP" -e "=>"
 +
Output:
 +
Net:  davinci_emac_initialize
 +
Ethernet PHY: GENERIC @ 0x11
 +
DaVinci EMAC
 +
=>
 +
Match Found. Operation completed!
  
 +
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
 
File Download completed
 +
flashing u-boot
  
−
Open Serial Console and write this command
+
Waiting for 0 seconds, press a key to continue ...
  
−
.
+
C:\devel\lizard\recovery2\windows>ucmd -p COM15 -c "protect off 0x08000000 +40000;era 0x08000000 +40000;cp.b ${buf} 0x08000000 0x40000" -e "Copy to Flash... done"
 +
Output:
 +
protect off 0x08000000 +40000;era 0x08000000 +40000;cp.b ${buf} 0x08000000 0x40000
 +
Un-Protected 2 sectors
  
−
.
+
.. done
−
 
+
Erased 2 sectors
−
"=> mw.w ${buf} 0xFF 0x40000; loadb ${buf} 115200"
+
Copy to Flash... done
−
 
+
Match Found. Operation completed!
−
.
+
recovery completed
−
 
 
−
.
 
−
 
 
−
CLOSE Serial Console !!!!!!
 
 
</pre>
 
</pre>
−
{{ImportantMessage|text=Don't close the '''command prompt'''}}
 
  
−
Now it is necessary to open a serial console for example Putty and type the following command
+
User can now:
−
<pre>
+
* turn off the board
−
mw.w ${buf} 0xFF 0x40000; loadb ${buf} 115200
+
* restore original dip switch configuration <code>S2.2 OFF</code>
−
</pre>
+
* power on the board again to see the restored U-Boot startup
−
 
 
−
Now close the serial console and press <code>Enter</code> inside the command prompt.
 
−
 
 
−
A new download will start followed by some instruction messages..<pre>
 
−
Downloading file: 100.000% completed(218792/218792 bytes)
 
−
File Download completed
 
−
.
 
−
.
 
−
Open Serial Console and write this command
 
−
"=> protect off 0x08000000 +40000;era 0x08000000 +40000;cp.b ${buf} 0x08000000 0x40000"
 
−
"=> res"
 
−
.
 
−
.
 
−
.
 
−
</pre>
 
−
When the  download is finished, you need to reopen the serial console and type this command
 
−
<pre>
 
−
protect off 0x08000000 +40000;era 0x08000000 +40000;cp.b ${buf} 0x08000000 0x40000
 
−
res
 
−
</pre>
 
−
Now the board will restart and, if everything went ok, you should see the U-Boot command line prompt.
 

Latest revision as of 09:31, 16 March 2018

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Info Box
Lizard.jpg Applies to Lizard
Lizard-evb-02.png Applies to LizardEVB-Lite

Introduction[edit | edit source]

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 flash

This assume that you're using a standard LELK hardware and software.

Tool Preparation[edit | edit source]

  • Download the lizard-recovery.zip archive and extract it on your Windows PC
  • If needed, replace the u-boot.bin file with your custom binary or download the latest LELK binary from 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
C:\Users\Desktop\lizard-Recovery\lizard> .\uart-recovery.bat COM1

The tools is now waiting for the board to wakeup

Board Preparation[edit | edit source]

  • Power off the board and set the dip switch S2.2 ON to select serial boot
  • Connect UART2 to your host PC
  • Turn on the board

Flashing the firmware[edit | edit source]

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: 


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

Waiting for 0 seconds, press a key to continue ...

C:\devel\lizard\recovery2\windows>ucmd -p COM15 -c "STOP" -e "=>"
Output:
Net:   davinci_emac_initialize
Ethernet PHY: GENERIC @ 0x11
DaVinci EMAC
=>
Match Found. Operation completed!

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

Waiting for 0 seconds, press a key to continue ...

C:\devel\lizard\recovery2\windows>ucmd -p COM15 -c "protect off 0x08000000 +40000;era 0x08000000 +40000;cp.b ${buf} 0x08000000 0x40000" -e "Copy to Flash... done"
Output:
protect off 0x08000000 +40000;era 0x08000000 +40000;cp.b ${buf} 0x08000000 0x40000
Un-Protected 2 sectors

.. done
Erased 2 sectors
Copy to Flash... done
Match Found. Operation completed!
recovery completed

User can now:

  • turn off the board
  • restore original dip switch configuration S2.2 OFF
  • power on the board again to see the restored U-Boot startup
HOME SOMs SBCs ToloMEO Embedded Assistant Sale-tag.pngGET A QUOTE Customer-service.pngONLINE HELPDESK
Roadmap IoT Services ML/AI services Embedded Design Services
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