#Kombiinstrument zerlegt, um das #EEProm direkt zu programmieren.

#DIY #Auto #autorepair

Fehler gefunden, eines der Hilfsprogramme schreibt Müll auf das #EEProm. 😡
#Kombiinstrument ausgebaut und jetzt dann das EEProm direkt beschreiben.

Auf der Suche nach Informationen zum #EEProm-#dump des Kombiinstrument #dashboard meines #Audi #A4 #B6

Hab ich jemand unter meinen #Follower:innen, die/der sich damit schon beschäftigt hat, und die eine oder andere interessante #hex-Adresse kennt?

#DIY #Auto #VAG #ecu

PS: auch einen originalen Dump, bitte decrypted, von einen 2.5 tdi könnte ich gebrauchen.

Migrieren von C-Code nach #Golang zur Bearbeitung binärer Dateien eines #EEProm stellt mich schon vor Herausforderungen. Aber man lernt halt auch was.

Еноты и немного цифр

И снова всем привет, не ждали? :) В предыдущих статьях я описал почти всё что можно было описать, но самую важную часть упустил из виду. Мало того - я эту часть упустил в целом, за всё время работы над проектом :( А дело в наглядности. Все желают видеть цифры. Даже не думал делать никаких сравнительных таблиц, но вот сегодня наткнулся на готовую таблицу от автора лучшей программы для 341 под линукс - IMSProg. Изучил таблицу и решил, что и мне таблица для наглядного сравнения параметров всё-таки нужна, и сделал на её основе свой вариант. Огромная благодарность её автору за тесты и готовый материал для сравнения! Часть первая - скорость работы.

https://habr.com/ru/articles/903428/

#spi #flash #eeprom #windows #linux #android #bios

Diagnosing and attempting to fix a Yamaha DX100 – Part 3

At the end of part 1, I’ve established that the basics all seem ok (PCB, interconnections, power) and that basic digital logic stuff is happening.

In part 2 I checked the ROM, reflowed a number of the solder joints, and started to look at the connectors between the main PCB and the LCD, but still with no luck.

Now I’m finally getting around to looking properly at those data signals to see what my next steps might be.

Oh and nope, still not fixed. Sorry.

Warning! I am not an electronics person. I strongly recommend that you don’t base your own attempts at fixing a beloved vintage synth on anything I’ve said here. I was given this synth rather than it being sent it to a recycling centre so this is a low-risk learning activity for me. I am not responsible for any damage to expensive or irreplaceable electronic musical instruments! There are plenty of places to take something for a proper repair 🙂

If you are new to microcontrollers and electronics, see the Getting Started pages.

Replacing the LCD – Continued

In part 2 I thought that it would be worth seeing if I could replace the LCD with an alternative, seeing as it appeared to be just a common HD44780 based display, but the connector used was giving me trouble.

In the end I just took the plastic shrouds off some Dupont style jumper wires and poked them directly into the connector on the PCB.

This finally gives me a way into some of the control signals and data lines on the main bus. First things first, I connected up a replacement display. Usefully the pinout of this connector matches exactly the pinout of a LCD1602 display.

The only additional connections required are an extra +5V/GND for the backlight (marked as “K” and “A” on my display). All the other connections match as shown by the schematic.

Hooking up an oscilloscope as follows:

• Yellow = E = LCD Enable pin (decoded from A10-15=0; A13=1)
• Blue = R/W (low = write)
• Purple = RS = register select (maps onto A0 on the address bus)
• Darker blue = D0

and triggering off the enable pin gives me the following trace:

The darker blue line is D0 and as can be seen – it is basically all over the place. It definitely looks like something is breaking the data lines, so the question now is what. I also checked D1-D7 and they all look pretty similar.

From my previous experiments the fact that I can read the ROM successfully, and now have replaced the LCD implies one of the other devices. So I think that leaves the following options:

• The CPU itself
• RAM
• A/D
• OPP – the Yamaha FM tone generator itself

But as all these are soldered down, it makes the next step a little tricky.

I’ve triggered the scope of the various CS/OE lines for the RAM, ADC and OPP and checked the local equivalent of D0 and the pattern seems the same everywhere.

Interestingly I don’t ever see a CS/OE line for the ADC or OPP – but then if it is failing to boot then the CPU will never get around to trying to access either of those I’d imagine.

By the way, on startup, there are there points where the LCD “E”nable pin is accessed. Two single instances, and then a large block as shown below.

Removing the ROM

Just out of interest I thought it was worth seeing what the signals looked like with the ROM removed (seeing as it is socketed and easy to remove). I triggered of the CE for one of the RAM chips and checked the signals.

The RAM isn’t accessed as much, but then with no ROM I don’t know what the CPU would be doing anyway…

But when it is, D0 (dark blue again in the trace below) looks a lot more like a sensible digital signal to me.

So now I’m thinking I really ought to eliminate the idea of a problem ROM chip before desoldering any of the RAM to test that…

Aside: at one point, when just monitoring the data signal, I got a much cleaner signal, but very definitely appearing to show three distinct states, which again reinforces the fact that something, somewhere is trashing over the data lines…

Replacing the ROM

As discussed last time, the DX100 uses a 27C256 style ROM which isn’t quite the same pinout as the more common 28C256 EEPROM that can be found relatively easily these days. However there is also a 29C256 which does have essentially the same pinout as the 27C256.

I happen to have some, but I don’t know if they are any good! I also have my Arduino EEPROM Reader but I’ve never tried to write with it and certainly not tried to do anything with a 29C256.

So this might have to wait for another day now as getting a replacement ROM might turn into a mini side-project in its own right.

If I do give that a go, I’ll come back and update this post.

Further Thoughts

I feel like I’ve made a little more progress in appearing to have eliminated the LCD as a source of the issue.

I don’t feel like the ROM is the problem, as I was able to successfully read it with my programmer, but on the basis that it can be swapped out without anything drastic like desoldering chips, I really ought to try that before taking a soldering iron to the RAM chips…

Of course, if you spot any other options do feel free to let me know.

Kevin

#dx100 #eeprom #lcd1602

NVRAM из EEPROM

Дана функция чтения и записи EEPROM dword. Запись и стирание возможно только по выровненному адресу и пословно. Надо поверх EEPROM API сделать функцию чтения, записи и стирания для произвольных массивов байт, по произвольному адресу (NVRAM). Простыми словами надо состыковать Dword API с Byte API. В этом тексте я представил простой наивный алгоритм решения данной задачи.

https://habr.com/ru/articles/815639/

#eeprom #NVRAM #flash #память #файловые_системы #объединения #union #lazy_write #API #littleendian

Den #EEProm der #ECU des #Audi #A4 B6 konnte ich nun auslesen, und den PIN-Code verifizieren. Doch irgendwie scheint der HEX-Dump fehlerhaft. Darum mal eine zweite ECU geordert, um da einen Vergleich zu haben?

Zumindest funktioniert das mit dem Adapterclip direkt auf dem Mainboard, und auch das Linuxprogramm für de Programmer ist recht ansprechend.

#diy #reparatur #repair @reparatur @repaircafe_de

Sauver des données embarquées à dos d'outarde
https://linuxfr.org/users/siltaar/journaux/sauver-des-donnees-embarquee-a-dos-d-outarde

Ou comment l'association @GEBULL, petit GUL de province, a contribué à une étude scientifique.

À la fin du mois de novembre 2021, une balise de suivi d’oiseau nous a été confiée par le Groupe Ornithologique des Deux-Sèvres. Muette depuis 4 ans sur le dos d’une outarde canepetière, perdue pour la science mais recapturée dernièrement, nous avions pour consigne d’en extraire coûte que coûte les dernières données relevées.

#LinuxFr #GUL #GODS #BassinesnonMerci #embarqué #ornithologie #regex #vim #sciences #récupération #gps #zigbee #josm #osm #eeprom #TotOutarde

New video! I'm taking a look inside my very inexpensive EPROM eraser and I'm making some modifications.

YouTube: https://youtu.be/BN1Y0NIqM60
PeerTube: https://makertube.net/w/eiXyGku3QcaifmyeUyAysg

#EPROM #EPROMeraser #Mods #Repair #Improvement #UVlight #EEPROM #UVEPROM

EPROM emulieren statt brennen

Vor kurzem bin ich auf ein interessantes Projekt gestoßen. Es ging um einen sogenannten EPROM-Emulator. Also ein Gerät, das u.a. über USB über einen Adapter vorgibt, ein EPROM zu sein.

#27C512 #27C64 #adapter #Arduino #EEPROM #Emulator #EPROM #Flash #Projekt #Standalone

https://dirkwouters.de/eprom-emulieren-statt-brennen/

Nachbau des DELA EPROMMER II für den Commodore C64

Diesmal habe ich meinen alten DELA EPROMMER II wieder aufgebaut. Das war damals mein zweites EPROM-Programmiergerät, mit dem ich eine Menge EPROMs geschrieben habe. Und ich fand, dass sich ein Nachbau dieser Erweiterung lohnt, zumal immer noch viele die EPROMs direkt mit dem C6…

#c64 #commodore #DELA #EEPROM #EPROM #Hidden #Menu #Programmer #Replica #Service #Software #Test #Userport

https://dirkwouters.de/dela-eprommer-ii/

Like this EDC16U31, as instructions will show, depending on #ECU, or carbrand, some #immoff data is written to #flashmemory those bigger #EEPROM 👇

www.5021.tips/ujanja/immoff

☝️👆
This rubbish includes the already #hacked data, just to copy & paste, otherwise we give you the #immooff tools to obviously #doityourself, #HapaUjanjaTu 🤷!

#carkeyprogramming #ecurepair #lostkeys #sparekeys #usedparts #5021tips #autorepairtips #autotips #automotivetechnician #autoelectrical #learneverything
#Keys

To #teachyourself #howto do complicated #coding #programming without assistance from a #software nor other #programmer, compare data before & after any #codingwork been done to that #EEPROM🤷!

Like to do #immooff, compare these👇 data, before & after then....

www.5021.tips/ujanja/immoffiles

👆☝️👆☝️
All files included with instructions so You can #doityourself, #HapaUjanjaTu🤷

#imoff #dpfoff #adblueoff #ECUProgramming #keyprogramming #programmingtips #5021tips #codingtips #ecuprogrammer #carkeys

If #circuitboard has a few #ElectronicComponents, #hakunamatata, lesser or no consequences, BUT

...the #circuitboards with many, sophisticated #IC's or other #digitalelectronics' components, kindly always option removing the #EEPROM off from the #Motherboard, #inshaAllah, no damage happens!

www.5021.tips/ujanja/eepromwork

☝️👆
That nonsense doing #EEPROMwork, #howto read & write & decode & code & all rubbish🤣😁😂!

#electronics #electronicsrepair #MotherboardFix #repairtips #5021tips #diytips

This some #algorithmhack revealing procedures used by different #carbrands to #encrypt, secure #carimmobiliser, #carkeys' systems🤔!

www.5021.tips/ujanja/immopins

👆☝️👆☝️
In case of #lostkeys or even some #sparekeys, to be able #programkeys, in some #vehicles You just simply use VIN or #ChasisNumber, others you use part number of certain #controlunit, others You may need read/load #EEPROM data from specified #ECU and so much, #HapaUjanjaTu #DoitYourself be a #mjanja #5021tips

Especially as a #keyprogrammer, this setup could be useful to quickly know which #EEPROM stores the #carkey data🤷! Where it is or are located👇

www.5021.tips/ujanja/eepromfinder

☝️👆☝️
To a usual #autotechnician this makes You more wiser NOT to just change sensitive #spareparts🤷!
Remember, #HapaUjanjaTu so #DiY #DoitYourself #keyprogramming #lostkeys #sparekeys #lostkey #ECUProgramming #locksmithtools #DiYtips #5021tips #cartips #programmingtips

Inaeza kuwa kwa kutaka kupandisha, kushusha au kurekebisha #milleage, whatever happens data ina corrupt ama kupotea, nk!
Repair the #instrumentcluster coz #HapaUjanjaTu

www.5021.tips/ujanja/odocorrectdump

☝️👆
Kuna #EEPROM data generator pamoja na .bin file alafu ni #diy, hakuna loongo longo #doityourself ili muradi una namna kuhamisha data, #inshaAllah!

#milleagecorrection #mileage #autotips #5021tips #cartipsandtricks #usedcars #autotechnician #fundiumeme #autorepairtools #autorepairtips