On Fri, 11 Dec 2015 10:52:38 +0100 Ruben Van de Put email@example.com wrote:
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]
Is there anything else I can try or should I try replacing the flash chip?
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.