Hi Piotr,
I tried your program, but hadn't any sucess.
macbook-steffen:eeprom steffenmauch$ hexdump eeprom.new
0000000 00 00 03 04 10 60 00 04 c0 64 00 00 00 00 94 0a
0000010 9e 08 a6 10 0a 03 74 00 65 00 78 00 74 00 08 03
0000020 55 00 53 00 42 00 10 03 6b 00 6f 00 6d 00 69 00
0000030 73 00 63 00 68 00 00 00 00 00 00 00 00 00 00 00
0000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 d6 75
macbook-steffen:eeprom steffenmauch$ hexdump eeprom.new
0000000 00 81 a5 82 11 80 ca 80 08 80 1a 80 10 80 19 80
0000010 1c 80 0b 80 00 80 00 80 00 80 00 80 00 80 3a bd
0000020 ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf
0000040 00 81 a5 82 11 80 ca 80 08 80 1a 80 10 80 19 80
0000050 1c 80 0b 80 00 80 00 80 00 80 00 80 00 80 3a bd
0000060 ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf
The first is a build eeprom, the second the eeprom I read back.
I also tried a file with 128 bytes of 0x00 and 0xff.
I think I can't programm anything to the device, because nothing
changed during these tests.
I could solder another new eeprom, but I didn't want to kill these
eeproms too.
Does anyone know, why I can't write anything to it?
Could I write such a mess to my eeprom that it is really broken?
Thanks.
Steffen
Am 08.02.2010 um 00:16 schrieb Piotr Pawluczuk:
Hi Steffen,
The ftdi_eeprom utility and ftdi eeprom related functions are not
working well with new FTDI chips. I haven't tried to program any of
FT2232H series, but I broke my FT232R chip. I didn't have much time
to work on that, so I still don't know exactly which part of the
EEPROM building code is broken.
I was able to fix it with a Linux box and a raw EEPROM backup I made
from a different chip. If you have another FT2232H chip, please make
a dump of the EEPROM and then restore it.
I have attached a simple utility I made for that purpise, but you
will probably need to modify it, as in my case the VID and PID were
still correct.
Good Luck!
Piotr
On 10-02-08 00:01, Steffen Mauch wrote:
Hi,
I tried to change the manufactor and product string of FT2232h.
I used ftdi_eeprom to do it and something went wrong.
Now the FT2232h doesn't enumerate. I disabled the eeprom and now it
is working again.
How could I fix the wrong eeprom?
I thought that if I boot the FT2232h without eeprom and enable it
after enumeration then I should be able to program it again.
I tried FT-Prog, but I got an error, vendor id or product id are
not allowed to be zero.
But I tried to erase the device.
ftdi_eeprom says that it could write. But I have he feeling that
something goes wrong during programming the eeprom.
If I read back the eeprom, it looks as the attached eeprom.new.
Has anyone programmed an FT2232H device with ftdi_eeprom?
So does it really work?
How could I repair my wrong eeprom?
Thanks.
Mit freundlichen Grüßen
Steffen Mauch
-------------------------
cand. B.Sc. Steffen Mauch
Digital Communications & Signal Processing Lab
Fakultät Computer & Electrical Engineering
Hochschule Furtwangen University
Robert-Gerwig-Platz 1
78120 Furtwangen
Tel +49 (0)7723 920 2342
Fax +49 (0)7723 920 2802
Cell +49 (0)1511 235 2355
Steffen.Mauch@xxxxxxxxxxxxxxxx
www.DCSP.HS-Furtwangen.de
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