[flashrom] [coreboot] flashrom and 256 MiB S256FL256S

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Thu Sep 27 22:52:24 CEST 2018

On 27.09.2018 22:34, Nico Huber wrote:
> On 9/27/18 10:11 PM, ron minnich wrote:
>> yeah, also is there a programmer you recommend for 32MiB parts?
> Any programmer that can handle arbitrary SPI commands, e.g. single-
> board computers with native SPI interface (RPi, BeagleBone Black etc.),
> CH341A is popular but slow, FTDI based programmers are faster (FT232H/
> FT2232H/FT4232H), serprog programmers (some may not be too slow), Bus-
> Pirate rather slow too.

If you want programming to be fast (almost on par with Dediprog): Either
Raspberry Pi or Beaglebone Black.

The Beaglebone Black has an abysmal internal power supply and for any
in-circuit flashing you'll need an additional 3.3V supply for the flash
chip. For standalone chips it usually is sufficient, though.

The Raspberry Pi has SPI disabled by default, you need to add
dtparam=spi=on to the file /boot/config.txt .


> Nico
>> thanks
>> ron
>> On Thu, Sep 27, 2018 at 1:10 PM Nico Huber <nico.h at gmx.de> wrote:
>>> Ah, dediprog... you happen to have the one programmer that is hard to
>>> support.
>>> On 9/27/18 9:49 PM, ron minnich wrote:
>>>> hmm, is this useful?
>>>> Found Spansion flash chip "S25FL256S......0" (32768 kB, SPI) on dediprog.
>>>> Erasing and writing flash chip... 4-byte address requested but master
>>> can't
>>>> handle 4-byte addresses.
>>> That is expected, native 4-byte instructions are tried first but they
>>> are not implemented yet for dediprog. It should fall back to another
>>> instruction though. Unless the dediprog resets the chip between in-
>>> structions, it should actually work. Though, David seemed to have
>>> trouble with that too, I didn't test it myself yet.
>>>> Looking for another erase function.
>>> Can you please just post the whole log (best taken with -o logfile).
>>> Nico

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