Przerobienie raspberry pi na programator pamięci BIOS

[morfik]

W tym artykule gościu ma dokładnie ten sam układ (ten sam laptop), choć wlutowany w płytę, ten sam klips, i chyba też te same kable. No i jak widać używa 6 połączeń. Więc to jest trochę dziwne, że coś mi nie działa.

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Ciekawa obserwacja jeszcze.

Jak odłączyłem te 2 kabelki przy adapterze USB, to chyba trochę system wariuje. Przez większość czasu nie wykrywa żadnego czipa ale jak się dość szybko wydaje polecenie flashrom, to można zauważyć takie komunikaty:

Kod:

root@raspberrypi:/home/pi# flashrom --programmer ch341a_spi
flashrom  on Linux 4.19.118-v7l+ (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Macronix flash chip "unknown Macronix SPI chip" (0 kB, SPI) on ch341a_spi.
===
This flash part has status NOT WORKING for operations: PROBE READ ERASE WRITE
The test status of this chip may have been updated in the latest development
version of flashrom. If you are running the latest development version,
please email a report to flashrom@flashrom.org if any of the above operations
work correctly for you with this flash chip. Please include the flashrom log
file for all operations you tested (see the man page for details), and mention
which mainboard or programmer you tested in the subject line.
Thanks for your help!
No operations were specified.

Kod:

root@raspberrypi:/home/pi# flashrom --programmer ch341a_spi
flashrom  on Linux 4.19.118-v7l+ (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Macronix flash chip "MX25L3205(A)" (4096 kB, SPI) on ch341a_spi.
Found Macronix flash chip "MX25L3205D/MX25L3208D" (4096 kB, SPI) on ch341a_spi.
Found Macronix flash chip "MX25L3206E/MX25L3208E" (4096 kB, SPI) on ch341a_spi.
Found Macronix flash chip "MX25L3273E" (4096 kB, SPI) on ch341a_spi.
Multiple flash chip definitions match the detected chip(s): "MX25L3205(A)", "MX25L3205D/MX25L3208D", "MX25L3206E/MX25L3208E", "MX25L3273E"
Please specify which chip definition to use with the -c <chipname> option.

Kod:

root@raspberrypi:/home/pi# flashrom --programmer ch341a_spi
flashrom  on Linux 4.19.118-v7l+ (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on ch341a_spi.
===
This flash part has status NOT WORKING for operations: PROBE READ ERASE WRITE
The test status of this chip may have been updated in the latest development
version of flashrom. If you are running the latest development version,
please email a report to flashrom@flashrom.org if any of the above operations
work correctly for you with this flash chip. Please include the flashrom log
file for all operations you tested (see the man page for details), and mention
which mainboard or programmer you tested in the subject line.
Thanks for your help!
No operations were specified.

Kod:

root@raspberrypi:/home/pi# flashrom --programmer ch341a_spi
flashrom  on Linux 4.19.118-v7l+ (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Macronix flash chip "MX25L3205(A)" (4096 kB, SPI) on ch341a_spi.
No operations were specified.

Nawet idzie taki czip odczytać ale sumy kontrole za każdym razem są inne:

Kod:

root@raspberrypi:/home/pi# sha1sum backup*
f77a09f125dd62e5534f8d9875781ebbdc115517  backup1.bin
573ea847a6a95bcca349881cb24383cbdd0ea4fc  backup2.bin
8d0d827c466958bf8ca6019835408ae9d49561c8  backup3.bin

Więc raczej te dwa dodatkowe kabelki trzeba będzie podpiąć.

A czy gdyby ten czip był na płycie to można by skorzystać z 6 kabli czy to nie ma znaczenia?