16 Aug
2021
16 Aug
'21
1:47 p.m.
To whom it may concern,
I do not have any idea what the response below is in reference to. I asked about where to obtain the public key or fingerprint for the download so I can compare hash.
--
Aleks Ozolins
m:973.464.5242
aleks@aleksozolins.com
https://www.aleksozolins.com
Alexander 'lynxis' Couzens lynxis@fe80.eu writes:
> [[PGP Signed Part:Undecided]]
> Hi Aleks,
>
> common problems with flashing SPI chips in-system (in-system = without
> desoldering the chip) are power supply and signal integrity.
>
> power supply => either your power supply at all isn't sufficient or the
> spi chip draws too quick power that an additional capacitor (of
> the correct size) closer to the chip is required.
>
> signal integrity => improve your cables, shielding, reduce EMI or
> desolder the chip and put it on a seperate board, etc.. Or reduce the
> spi speed, what you already did. Maybe use a different spi clip or
> solder cables on top of your spi chip if you want to stay in-system.
>
> in-system flashs are always special and depend on the PCB of your
> target board. some boards aren't possible to flash at all. But I think
> thinkpads are possible to flash in-system, but it has a low possibility
> of bricking it.
>
>
> For sure we have bugs in flashrom. But usually it's power of signal
> integrity ;).
> If it's an bug within flashrom, I would also desolder the
> chip and solder it to a small debug board. So you could reduce other
> failures soures and to test flashrom in a "known" environment.
>
> Best,
> lynxis
>
> [[End of PGP Signed Part]]