On Fri, 11 Dec 2015 10:52:38 +0100 Ruben Van de Put <[email protected]> wrote:
> Hello, > > I'm having some problems flashing a SPI chip with the BusPirate V3. Writing > the image is successful but verification is not successful. > > First try with chip on breadboard and long leads (20-25cm): > http://paste.flashrom.org/view.php?id=2841 > > Then I shortened the signal leads and soldered them directly on the > BusPirate: > http://paste.flashrom.org/view.php?id=2842 > > Then I soldered all leads directly on the chip (with an adapter) instead of > using a breadboard: > http://paste.flashrom.org/view.php?id=2844 > > I also tried lowering the SPI speed to 1 MHz: > http://paste.flashrom.org/view.php?id=2845 > > Current set-up > [image: Inline afbeelding 1] > [image: Inline afbeelding 2] > > Chip datasheet: http://www.farnell.com/datasheets/1674442.pdf > Flash connected in this way: http://flashrom.org/Bus_Pirate > > Is there anything else I can try or should I try replacing the flash chip? Hi Ruben, if you did not give up yet: looks like your changes constantly improved the situation and you would probably succeed if you just continued to write the same image a few more times. One thing that could further improve the communication between the BP and the flash chip: adding line termination resistors or capacitors as well as a decoupling capacitor between VCC and GND as near as possible to the flash chip. See also https://www.flashrom.org/ISP with some more details even though the site is directed at other use cases. -- Kind regards/Mit freundlichen Grüßen, Stefan Tauner _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
