Vida CEM swapping

T5Luke · Post by **T5Luke** » 25 Nov 2020, 02:18

I don't know if it makes sense to discuss about an os here. If you diag your car with dice you are forced to windows anyway. Many production environments are based on windows also, every os systems has pros and cons. Also most normal users here in forum would use a windows os and if you are a pro in another os it would be easy for you to adopt the serial terminal for your needs. For me it doesnt matter in which os to prog. But my diagnostic computer runs on windows and i see no reason in dual boot or use a vm.

But beside, this tool cracks the code. Just some simple commands would be nice in termianl. So a terminal only use and a optional connected programm could work on this project. It won't be the best way to read a binary file from arduino terminal window or paste binary data for flashing into arduino terminal.

Post by **vtl** » 25 Nov 2020, 07:50

gnalan wrote: 24 Nov 2020, 23:19 Which distro do you use, or do you build your own from the command line?

Various. Mainline distros don't differ much these days.

Post by **gnalan** » 13 Dec 2020, 16:05

How's the progress going?

jcdillin · Post by **jcdillin** » 14 Dec 2020, 14:38

Any reason why the 2 channel can shield for the PI couldn't be used? It's already 3.3V logic level so would save the level shifting. Looks like the INT would still have to be manually wired over.

https://www.amazon.com/seeed-studio-CAN ... B08NDLXHNW

Post by **vtl** » 14 Dec 2020, 14:44

Mark Dapoz did a port for the built-in CANs and external transceivers. Porting this Arduino code to other bare-metal platform is trivial. Anything will do the crack if it is able to see the reply latency in 1us increments.

Post by **gnalan** » 17 Dec 2020, 06:45

RickHaleParker wrote: 19 Nov 2020, 00:17 P2 CEM-H: HS CAN 250 kbps, LS CAN 125 kbps. ( Motorola MC68386, 1999 - 2004 )

I can't seem to find a datasheet for the MC68386. Are you sure that's the correct IC?

Post by **yagger** » 17 Dec 2020, 10:42

Post by **RickHaleParker** » 17 Dec 2020, 10:58

gnalan wrote: 17 Dec 2020, 06:45 I can't seem to find a datasheet for the MC68386. Are you sure that's the correct IC?

I cannot find a datasheet. I found the part number on the D5T5 website. Companies are keeping a tight rein on what use to be readily available information. Not surprising considering one of the big issues today is the right to repair.

The MC683XX line started under Motorola continued under Freescale Semiconductor. Don't know if it survived the merger with NXP.

I wonder if it a typo on the D5T5 website. I found the datasheet for a MC68336. 3 is often misread as 8. I got a CEM-H somewhere in the shed. Maybe I will find it and pop it open.

Post by **gnalan** » 17 Dec 2020, 13:51

MC68376 datasheet
https://www.digikey.com/en/products/det ... T20/410949

Post by **gnalan** » 21 Dec 2020, 14:14

https://github.com/GENIVI/CANdevStudio

Has anyone tried the above program? Not sure if it'll give you the codes you're looking for, but it seems to be a decent program.

If anyone has used the program, were you successful with using DiCE to do the reading/writing? Something I'm thinking about trying, if I can use my Genuine Volvo DiCE. I paid enough for it that I don't want to spend more money to make something that'll do the same thing the DiCE is capable of doing straight out of the box. Obviously you can read and send data with DiCE through VIDA, but I don't see a way to intercept the messages/data being read/written in real time using VIDA.