Re: [flashrom] Flashrom reading/writing Pm25LV512 issue

[Stefan Tauner]

On Tue, 27 Jan 2015 22:36:03 +0200
Tudoran Mihail  wrote:
> Hello,
>
> I am encountering some issues trying to read a Pm25LV512 SPI flash from a
> small LCD monitor, really got stuck at this point.
>
> Hardware:
> Pm25LV512 attached to a Weltrend WT8871 video IC
> Arduino UNO R3 with 16u2 USB<>Serial converter
> CD4050 to convert 5v to 3v3
> Used the schematic provided on http://flashrom.org/Serprog/Arduino_flasher
>
> to interface the chip
> Tried "in-circuit" programming without removing the chip from the board
> Wire length of less than 8cm.
>
> Software:
> Latest serprog-duino from git
> Tried with flashrom v0.9.6.1-r1563
> And with flashrom v0.9.7-r1711
> Ubuntu 14.04 64bit
>
> I really appreciate any help I could get and can provide any info/logs
> needed.

The result looks as if you are reading random data... either your
connections are wrong/bad, or the board is disturbing the communication
on the SPI bus. See also http://flashrom.org/ISP