VAG-COM/VCDS EVERYTHING

[Sean4211031]

Hey guys new to this site, newish to vcds. I bought a cable that came with 18.2.0. I did not remenber seeing the request on not to update it. I did. Cable bricked. I have been led to believe that reflashing the cable can unbrick it. Can anyine here help me out with a guide on doing so. Im not mega tech savvi but i can follow instructions and solder half decent. Any help would he much appreciated

[pablobrsp]

Hi Sean and welcome on board.

You did the same of many other members but here you can find all the documents you'll need to revive your vcds cable. To do so, I kindly suggest you read all the posts since the first one up to the latest.

Unfortunately this is the best way to understand how the cable works getting all information you are looking for.

I apologize my sincerely, but trust me.

KR

Pablo

[pablobrsp]

Hey guys new to this site, newish to vcds. I bought a cable that came with 18.2.0. I did not remenber seeing the request on not to update it. I did. Cable bricked. I have been led to believe that reflashing the cable can unbrick it. Can anyine here help me out with a guide on doing so. Im not mega tech savvi but i can follow instructions and solder half decent. Any help would he much appreciated

Hi Sean and welcome on board.

You did the same of many other members but here you can find all the documents you'll need to revive your vcds cable. To do so, I kindly suggest you read all the posts since the first one up to the latest.

Unfortunately this is the best way to understand how the cable works and get all information you are looking for.

I apologize my sincerely, but trust me.

KR

Pablo

[liviudiaconu]

Hehe, actually found the issue, one of wire got broken, so incorrect truth table was generated. Fixed, and got different result.
Attachment 583979

Attachment 583981

Filled in formulas for this table, and basically got hardware GAL delete performed on software (), and surprisingly it works fine on simple KLine radio, but perhaps won't work on LLine protocols and so on since a lot of cummunication crap is sent to K&L Lines

Attachment 583982

So it seems I have filtered too much combinations leaving only unique combinations (1024 -> 31 combination), which are clearly not enough.

Can't be this. pin 11 is logical to have effect, but in formulas aren't.
And as you wrote the formulas ..no gal needed, only wires between pins.

[C3H8]

Elektrik,
you are still more than welcome to generate a very small code table (32 entries) like I mentioned here. Please don't filter or narrow down, every line would be necessary to find the logic. I can do the Arduino sketch if you send me your current one.
I agree with you that in your current map important lines are missing, but in general it would also work with your approach. It is only very complex and could be so much easier.

[xoom]

Elektrik,
regarding the jedec file: Please check your pin 11: your jedec file above (called 0x44) doesn't have the negation on this pin (if I decompiled it correctly since I had to count and copy all the bit positions manually). Please double check (in red) with
nc1=1 i2=2 i3=3 i4=4 i5=5 i6=6 i7=7 i8=8 i9=9 GND=10 !i11=11
o12=12 o13=13 f14=14 o15=15 o16=16 f17=17 o18=18 f19=19 VCC=20

equations

!o18 = !i5 & !i9
# !i8 & i11
!o16 = !i4 & !i9
# !i7 & i11
!o15 = !i9
!o13 = !f14
# !i2 & !f17 & !i6
# !i3 & !f19 & !i6
!o12 = !i2 & !f17
# !i3 & !f19

if i try disassemble on paper i get same results

( !i5 & !i9 ) | ( !i8 & !i11 ) = !o18
( !i4 & !i9 ) | ( !i7 & !i11 ) = !o16
!i9 = !o15
!i14 | ( !i2 & !i17 & !i6 ) | ( !i3 & !i19 & !i6 ) = !o13
( !i2 & !i17 ) | ( !i3 & !i19 ) = !o12
Configurations:

All XOR bits its set to 0

AC1-2120 = 1 //Pin 19 set as Input
AC1-2122 = 1 //Pin 17 set as Input
AC1-2125 = 1 //Pin 14 set as Input

Global:
SYN = 1
AC0 = 0
which means Simple Mode

Signature: 0x30, 0x30, 0x20 //whatever it means

[xoom]

Attempt to draw it with crocodile physics (not 100% sure if it's correct)

[C3H8]

The signature bytes have no effect to the chip. You can leave a message for your descendants here.

[Elektrik1]

C3H8, 32 entries is not enough, because there's more inputs (19, 17, 14) which are dependent too. Already launched Quine-McCluskey algorithm to recreate functions for full 1024 cases combinations. Already got logic for PINS 12,15,18, which does fit all the cases (all greens). Still waiting for pins 16 and 13, because of high complexity, it may take a while.

If reconstructed will be inaccurate (missing some combinations), or will never end, will launch Espresso algorithm.

[xoom]

This is how inputs looks when press TEST Button.
Message (0x53, 0x04, 0x82, 0xD5) is command to test K Lines.. and after that ATF16V8 gets PIN7 pulled LOW and next PIN8 gets pulled LOW

Then here is connection to immobilizer module (25) :
First it sends 5 baud init on both K and L lines.. then communicates on 9500 baud only on K Line:

[xoom]

You can download Saleae Logic software to open capture files attached below:

[xoom]

Here is Power Up results:

[Elektrik1]

Ok guys, good news, I have managed to recreate logic by Espresso logic minimizer, got all greens, leaving excel here, now reading back and comparing original 0x46 chip and my compiled one to check if all input combinations matches 100%. Cable works fine. Will post .JED and source code later. Attaching Final excel.

Update:

Here's final logic:

PIN 18
---------------------------------------
(1)     X =     I
         or     K;

    not X = not I and not K;
---------------------------------------

PIN 16
---------------------------------------
(1)     X =     I and     M
         or     I and     N
         or     I and     Q
         or     L and     M
         or     L and     N
         or     L and     Q;

    not X = not I and not L
         or not M and not N and not Q;
---------------------------------------

PIN 15
---------------------------------------
(1)     X =     N;

    not X = not N;
---------------------------------------

PIN 13
---------------------------------------
(1)     X =     C and     F
         or     F and     M
         or     F and     Q;

    not X = not C and not M and not Q
         or not F;
---------------------------------------

PIN 12
---------------------------------------
(1)     X =     C
         or     Q;

    not X = not C and not Q;
---------------------------------------

Which corresponds to:

Name     0x46 ;
PartNo   00 ;
Date     2019-01-02 ;
Revision 01 ;
Designer Elektrik ;
Company  * ;
Assembly None ;
Location  ;
Device   g16v8a ;

/* *************** INPUT PINS *********************/
PIN 2    = i2                        ; /*                                 */ 
PIN 3    = i3                        ; /*                                 */ 
PIN 5    = i5                        ; /*                                 */ 
PIN 6    = i6                        ; /*                                 */ 
PIN 7    = i7                        ; /*                                 */
PIN 8    = i8                        ; /*                                 */ 
PIN 11   = !i11                     ; /*                                 */ 

/* *************** OUTPUT PINS *********************/
PIN 12   = o12                       ; /*                                 */ 
PIN 13   = o13                       ; /*                                 */ 
PIN 14   = f14                       ; /*                                 */
PIN 15   = o15                       ; /*                                 */ 
PIN 16   = o16                       ; /*                                 */ 
PIN 17   = f17                       ; /*                                 */ 
PIN 18   = o18                       ; /*                                 */
PIN 19   = f19                       ; /*                                 */ 

!o18 = i11 & !i8;
!o16 = (i11 & !i7) # (!i6 & !i5 & !i2);
!o15 = !i5;
!o13 = (!f17 & !i6 & !i2) # !f14;
!o12 = !f17 & !i2;

100% match to 1024 combinations logic, will check to all possible pins and outputs. Attaching fully working 0x46 .JED

We made it!

0x46.JED:

CUPL(WM)        5.0a  Serial# 60008009
Device          g16v8as  Library DLIB-h-40-2
Created         Fri Jan 04 18:22:51 2019
Name            0x46 
Partno          00 
Revision        01 
Date            2019-01-04 
Designer        Elektrik 
Company         * 
Assembly        None 
Location        
*QP20 
*QF2194 
*G0 
*F0 
*L00256 11111111111111111111111110111110
*L00768 11111111111111111111101111111110
*L00800 10111111111110111011111111111111
*L01024 11111111111110111111111111111111
*L01536 10111111111111101011111111111111
*L01568 11111111111111111110111111111111
*L01792 10111111111111101111111111111111
*L02048 00000000001100000011000000100000
*L02112 00000000101001001111111111111111
*L02144 11111111111111111111111111111111
*L02176 111111111111111110
*C21AA
*A040

[Jackson0]

Hi,

I have an old V704 Cable (Atmel162,FTDI,GAL,CAN) with killed EEprom.

Has someone an actual or pre-actual Version in German Hex/Ept File for me?

Regards,
Jackson

[xoom]

Hi,

I have an old V704 Cable (Atmel162,FTDI,GAL,CAN) with killed EEprom.

Has someone an actual or pre-actual Version in German Hex/Ept File for me?

Regards,
Jackson

Try read back like 10 pages back and you'll find kolimers loader and you can reflash your cable to german version.