Pages: 1 [2] 3 4 ... 6
Author Topic: ME7.5 Eeprom read and write  (Read 22161 times)
k0mpresd
Hero Member
*****

Karma: +73/-16
Offline Offline

Posts: 852


« Reply #15 on: August 05, 2010, 07:28:31 AM »

why not just buy like a gq-3x for $80usd with the soic8 adapter? i have one. works perfect. it takes 2 minutes to desolder and resolder.
Logged
ktech
Jr. Member
**

Karma: +0/-0
Offline Offline

Posts: 28


« Reply #16 on: October 11, 2010, 12:42:29 PM »

The point was to find a tool that could work in the middle of nowhere far away from the soldering iron when running the emulator in the middle of the night.
Hope you follow me Cheesy
I already got what suggest, and did it alot. and after 5 times removal it does not look that good anymore.

why not just buy like a gq-3x for $80usd with the soic8 adapter? i have one. works perfect. it takes 2 minutes to desolder and resolder.
Logged
s-company
Full Member
***

Karma: +3/-0
Offline Offline

Posts: 108


« Reply #17 on: October 13, 2010, 02:37:44 AM »

Hello!
I have same problems with eeprom and the checksum verification, can sombody help me to turn off the checksum validation on the attached dump?
It's from audi RS4_2,7TT
thanks a lot
Logged
ktech
Jr. Member
**

Karma: +0/-0
Offline Offline

Posts: 28


« Reply #18 on: November 07, 2010, 11:47:02 AM »

Did you try it out to see if it solved the problem by turning off the checksum verification??

Hello!
I have same problems with eeprom and the checksum verification, can sombody help me to turn off the checksum validation on the attached dump?
It's from audi RS4_2,7TT
thanks a lot
Logged
s-company
Full Member
***

Karma: +3/-0
Offline Offline

Posts: 108


« Reply #19 on: November 07, 2010, 12:55:06 PM »

Unfortunately I don't know how to turn off the verification at the moment.
Logged
Tony@NefMoto
Administrator
Hero Member
*****

Karma: +96/-4
Offline Offline

Posts: 1394


2001.5 Audi S4 Stg3, 2007 VW GTI Stg2


« Reply #20 on: November 08, 2010, 12:45:00 PM »

I think there is a byte in the serial eeprom to enable and disable checksum verification. I don't remember where it is though. I will try to have a look for it later.
Logged

Remember you have to log in if you want to see the file attachments!
Info or questions, please add to the wiki: http://www.nefariousmotorsports.com/wiki
Follow NefMoto developments on Twitter: http://twitter.com/nefmoto
ktech
Jr. Member
**

Karma: +0/-0
Offline Offline

Posts: 28


« Reply #21 on: November 16, 2010, 09:20:19 AM »

Tony

Could it be possible that you fantastic flash tool could be expanded to read and write the eeprom also?

I think there is a byte in the serial eeprom to enable and disable checksum verification. I don't remember where it is though. I will try to have a look for it later.
Logged
Tony@NefMoto
Administrator
Hero Member
*****

Karma: +96/-4
Offline Offline

Posts: 1394


2001.5 Audi S4 Stg3, 2007 VW GTI Stg2


« Reply #22 on: November 16, 2010, 06:45:27 PM »

I've gone through the serial EEPROM reading protocol in KWP1281 and KWP2000. The problem with implementing it is that half of the pages in the serial EEPROM are not allowed to be read or written. I assume VAG did this to prevent hacking the data on this EEPROM.
Logged

Remember you have to log in if you want to see the file attachments!
Info or questions, please add to the wiki: http://www.nefariousmotorsports.com/wiki
Follow NefMoto developments on Twitter: http://twitter.com/nefmoto
ArgDub
Full Member
***

Karma: +53/-1
Offline Offline

Posts: 204


« Reply #23 on: November 19, 2010, 05:34:30 PM »

I've gone through the serial EEPROM reading protocol in KWP1281 and KWP2000. The problem with implementing it is that half of the pages in the serial EEPROM are not allowed to be read or written. I assume VAG did this to prevent hacking the data on this EEPROM.

if I remember correctly reading the 32 bytes that contain login code isn't allowed, but whole eeprom is copied to ram where reading is posible. You can read part of eeprom and search the ram to find the copy location, then you can read the missing parts.
Logged
setzi62
Full Member
***

Karma: +121/-0
Offline Offline

Posts: 249


« Reply #24 on: November 20, 2010, 12:52:01 PM »

if I remember correctly reading the 32 bytes that contain login code isn't allowed, but whole eeprom is copied to ram where reading is posible. You can read part of eeprom and search the ram to find the copy location, then you can read the missing parts.
That's also the way Lemmiwinks is doing it. Searches the copy of the eeprom in the ram and
then writes the changed adaptation channels into the ram copy. When turning off ignition,
the changes are written back into the eeprom. But I'm not shure if you could update all
locations in the eeprom in this way or if it only works for certain locations like adaptation
chans.
A method to read and write the complete eeprom is to load your own r/w functions into
the ram and link in this code into the message handler. Then you can send your own
diagnostic messages which call your code in the ram and do the reading/writing without
any limitations.
Logged
Dobermann
Full Member
***

Karma: +4/-0
Offline Offline

Posts: 74


« Reply #25 on: December 28, 2010, 03:38:45 AM »

Hello friends,

is there now a cheap tool out to read and write the 8 pin seriel eeprom from the me 7 ecu that works good Huh

i need one to test !!

i listend that is possible to read write with a normal KKL Cable !!

maybe someone knows more !!??

king regards dobermann

Logged
Tony@NefMoto
Administrator
Hero Member
*****

Karma: +96/-4
Offline Offline

Posts: 1394


2001.5 Audi S4 Stg3, 2007 VW GTI Stg2


« Reply #26 on: December 30, 2010, 02:49:00 PM »

At the moment the only way to read the entire serial eeprom in it's raw format is to read it using an SOIC 8 adapter and hooking that up to an eeprom reader.

I used a willem eeprom programmer and an SOIC 8 adapter to read mine.

You don't have to remove the serial eeprom chip from the circuit board to read it, you can just clip the SOIC 8 test clip onto the serial eeprom.
Logged

Remember you have to log in if you want to see the file attachments!
Info or questions, please add to the wiki: http://www.nefariousmotorsports.com/wiki
Follow NefMoto developments on Twitter: http://twitter.com/nefmoto
heavy_mech
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 8


« Reply #27 on: December 31, 2010, 01:10:29 AM »

I haven't looked at the chip yet, even though my ECU is sitting here.  Are you talking about something like a Pomona 5250?  I know some of you guys are great at removing the chips, but I tend to make a bit of a mess sometimes.  This would prove much easier for me.
Logged
Tony@NefMoto
Administrator
Hero Member
*****

Karma: +96/-4
Offline Offline

Posts: 1394


2001.5 Audi S4 Stg3, 2007 VW GTI Stg2


« Reply #28 on: December 31, 2010, 11:41:46 AM »

Yup, the Pomona 5250 would work.
Logged

Remember you have to log in if you want to see the file attachments!
Info or questions, please add to the wiki: http://www.nefariousmotorsports.com/wiki
Follow NefMoto developments on Twitter: http://twitter.com/nefmoto
technic
Full Member
***

Karma: +5/-0
Offline Offline

Posts: 162


« Reply #29 on: January 22, 2011, 09:54:47 AM »

If you are referring to the 95040 eprom at bottom of pcb, it can be read with a kkl cable.


argdub, do you happen to know the command for write_ram?
Logged
Pages: 1 [2] 3 4 ... 6
  Print  
 
Jump to:  

Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Page created in 0.025 seconds with 17 queries. (Pretty URLs adds 0s, 0q)