On Fri, 18 Oct 2013 09:30:11 +0200 Raven email@example.com wrote:
I have tried to stabilize the Vcc with an additional Capacitor and cut the cables (to minimize the length), but with no luck.
I'm not sure if the Flash is really broken. Maybe the Programmer has a Problem (is unstable). Sometimes the arduino "locks up" and i have to unplug and plug the USB again. :-\
I think that is a known issue with the usb to serial converter of arduino unos. The converter is just another atmel microcontroller (ATMega<8, 16 or 32>U2), so the issue could potentially be fixed with a newer firmware... I dont know any details though. "Denis 'GNUtoo' Carikli" GNUtoo@no-log.org might know more. I have put him in CC but he does not have a lot of time lately.
Also tried with the parameter "spispeed=xx" but same (bad) results.
I have an AT45DB011B chip here, but unfortunately this chip is unsupported. :-( Not sure what the difference between the "B" and the "D" is.
The early AT45DB chips (<no suffix>, A, B revisions) do not support any identification opcodes so flashrom can not detect them at all (and I skipped adding dedicated support for them). I have never seen a user reporting one... maybe it works with "-c AT45DB011D -f" but I doubt it: most chips of the AT45DB family can switch between two major modes which change the observed address layout. Many of them indicate that in their status register... the early revisions do not (at least it is not documented in the datasheet)... the code for AT45DB011D is not designed to handle that correctly I think... so at least please do not try to erase/write if the chips contain something useful. :)
But if i have time i try it with a AT45DB161D, this chip should be supported.
The AT45DB161D is completely tested already, so there is no need to test it again from our side.
I try to do some tests with other chips, let's see if it works.
Good/better luck! ;)