Need dump from spi flash Mini Ptz V2 (ipcx-scb405ip-v10)
- Thread starter komplex
- Start date
vasycara
Getting the hang of it
- Jun 22, 2015
- 227
- 48
alastairstevenson
Staff member
What are the symptoms?
A common cause is a corrupted or missing PTB partition.
You could confirm if this is the case using 'show ptb' an the Amboot prompt.
It should list the partitions - if not, ptb is corrupt.
I can post some simple instructions here if you want to try recovering it.
I do also have a flash .bin image though I cannot be sure what the exact model was except 'Mini PTZ V2' as I only had the board itself.
The missing ptb can be fixed with a sneaky trick.
The Amboot environment variables resides in the same flash partition as the 'dtb' data
The fix is to tftp load to a specific memory location a copy of the dtb data (a few kB) and do a dummy 'setenv' to write the flash.
alastairstevenson
Staff member
Out of interest, what was the result of doing this?
And what does the tftp command produce?
Attached is a file that is the result of doing this :
cat mtd0ro mtd1ro mtd2ro mtd3ro mtd4ro > allmtd.bin
I have used this method before on a Mini PTZ V2 board with a CH341A SPI NOR programmer in-circuit, with the camera powered off and it programmed the flash OK.
Presumably that is also how you have read the SPI flash.
Good luck!
alastairstevenson
Staff member
Hey, well done!
It looks like you may have solved the problem.
You should be able to do some writes / verifies to the faulty SPI chip to confirm that it does not work fully.
It looks like you may have solved the problem.
You should be able to do some writes / verifies to the faulty SPI chip to confirm that it does not work fully.