Le 13/06/2015 09:54, Stefan Tauner a écrit :
On Thu, 11 Jun 2015 22:09:55 +0200 jackjean jackjean@vivaldi.net wrote:
Good evening all,
After heaving sweated for months, I finally call for help at the community...
My target is to program several SPI chips in order to repare some ASUS laptops, which was solved before by purchasing pre-programmed BIOS Chips
I first tried to access with an SOIC "gripper" clip, directly on the chip being soldered on the main board.
Facing to a lot of failures (unknown chip), I decided than to work on de-soldered chips.
This allowed me to extract some dumps on failing and fresh purchased SPIs.
Now, I have a satisfying database of complete images of BIOS, that I expect to use for programming new chips according each need.
At that point begin my problem :
After a abort during the first trial, I decided to erase my chip, and got the following advise :
_"C:\Flashrom>flashrom -E -p buspirate_spi:dev=/COM3,spispeed=1M_ _flashrom v0.9.6.1-r1704 on Windows 6.1 (x86)_ _flashrom is free software, get the source code at http://www.flashrom.org [1] [1]_
_Calibrating delay loop... OK._ _Found Winbond flash chip "W25Q32.V" (4096 kB, SPI) on buspirate_spi._ _Erasing and writing flash chip... FAILED at 0x00000800! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00000fff: 0x600_ _ERASE FAILED!_ _Reading current flash chip contents..."_
Than I decided to purchase a DIP to SOIC adaptor in order to eliminate my doubts on the connection by gripper. Now the chips I use are soldered ...
I tried to write again the BIOS image and got the following after a very long time of writing operation (more than one hour) and using the following command :
_"flashrom -w flash.bin -VVV -p buspirate_spi:dev=/COM3,spispeed=1M"_
The reslult is :
_"Your flash chip is in an unknown state._ _Please report this on IRC at chat.freenode.net (channel #flashrom) or_ _mail flashrom@flashrom.org, thanks!_ _buspirate_sendrecv: write 1, read 0 Sending 0x00_ _buspirate_sendrecv: write 0, read 4 , receiving 0x42 0x42 0x49 0x4f_ _buspirate_sendrecv: write 0, read 1 , receiving 0x31_ _Raw bitbang mode version 1_ _buspirate_sendrecv: write 1, read 0 Sending 0x0f_ _Bus Pirate shutdown completed."_
Considering than I took every possible care on the connection between Buspirate and SPI, and having a satisfying reading result (dumps are checked with Hex Editor and look OK), I am stucked at that point...
I would appreciate any support from you.
Hi,
you should have come here earlier probably :) Regarding your initial problems there are some hints at http://flashrom.org/ISP [2]
The failed erases and probably also the cause of the unknown state at the end comes from unconnected an !WP and/or !HOLD pin. See http://flashrom.org/Bus_Pirate [3] for more details on these connections.
If that does not help please post the write.log file generated by: flashrom -w flash.bin -p buspirate_spi:dev=/COM3,spispeed=1M -o write.log
Hello, and thank you for your appreciated support.
I confirm that pins 3 and 7 were free, according the advises from an ASUS laptops forum.
I than connected both pins 3 (HOLD) and 7 (WP) to the 3.3V.
Having also doubts on the Winbond SPI, I choosed to replace it by a Macronix.
First strange reaction is that flashrom recognises 3 possible different chips :
Than I choosed to add the "-c MX25L3205(A)" as option in the flashrom commands
I tried than to launch the writing command, but returns allways a fail, as you will read in attached log file.
Links: ------ [1] http://www.flashrom.org [2] http://flashrom.org/ISP [3] http://flashrom.org/Bus_Pirate
