Vida CEM swapping

Post by **RickHaleParker** » 29 Apr 2022, 10:14

gnalan wrote: 29 Apr 2022, 09:27 I'll work through it when I get a chance to, and if I don't see the theory in my head in his code I'll either do a rewrite on GitHub or post something here.

What is the theory?

Post by **gnalan** » 29 Apr 2022, 13:05

RickHaleParker wrote: 29 Apr 2022, 10:14 What is the theory?

I'm not sure now. I'm not familiar with BCD, and I was thinking in my head that it was hex values that were needed.

I need to learn what BCD is and how exactly to work with it. Then do some calculations with it to see exactly how it works hands on before I can code with it. Plus I like to learn, so it'll be fun to see just what can be done with BCD.

I'm sure vtl has already optimized it, but if there's still more that can be done I'd like to add what I can to help.

Post by **RickHaleParker** » 03 May 2022, 05:44

gnalan wrote: 29 Apr 2022, 13:05 I'm not sure now. I'm not familiar with BCD, and I was thinking in my head that it was hex values that were needed.

BCD Binary Coded Decimal. A nibble represents one of the 10 decimal characters.
Hex is exactly the same as BCD except a nibble can represent any of the 16 Hexadecimal character.
4 bits can represent 16 charters. In BCD 6 of the possible states are not used. In Hex all 16 are used.

BCD is how you count with 10 fingers ( base 10 ). Hex is how you count with 8 fingers and 8 toes ( base 16 ).

Power6 · Post by **Power6** » 04 May 2022, 18:22

I have updated PINMagic to deal with the DiCE session log files, this should work for P3 now since DOIP is not an option with VIDA. If you have a VIDA log file with a CEM unlock in it, you can get your PIN in seconds. If anyone tries it out let me know if you have problems, I had an extremely limited set of DiCE logs from VIDA to develop and test it. You can also use LogMagic to decrypt the log as well to see the interesting log lines for yourself.

https://spaycetech.azurewebsites.net/LogMagic.html

Post by **charlie13** » 06 May 2022, 01:12

Anyone has a description of how to connect cem P2b on the table?

Post by **vtl** » 06 May 2022, 09:07

All CEM pinouts can be found in VIDA. For the brick-shaped CEM you need a K-Line addition to the cracker. I think someone reported he was able to talk to CEM using non-OBD CAN pins. They are open at all times.

Post by **charlie13** » 06 May 2022, 09:17

vtl wrote: 06 May 2022, 09:07 All CEM pinouts can be found in VIDA. For the brick-shaped CEM you need a K-Line addition to the cracker. I think someone reported he was able to talk to CEM using non-OBD CAN pins. They are open at all times.

Sorry. But I found nothing in vida EWD. Nobody has written anything on the forum whether it works, the K lines can be given from vida

Post by **vtl** » 06 May 2022, 09:18

VIDA, not EWD

Post by **charlie13** » 06 May 2022, 09:26

Function group ?

Post by **vtl** » 06 May 2022, 09:31