Vida CEM swapping

T5Luke · Post by **T5Luke** » 02 Apr 2021, 15:58

Not my first bootloader, this is even able to read and write external EEPROM of the CPU, but i think most people want a config changer here and i hope to get it work this easter days... Who just needs a dice flash reading tool can pm me to read out his complete CEM flash when he got code by teensy before.

MaxDenisov · Post by **MaxDenisov** » 02 Apr 2021, 16:25

Very good news! Happy Easter!)

MaxDenisov · Post by **MaxDenisov** » 05 Apr 2021, 01:22

I just wondering if it is possible to read/write ECU using DICE as well?
here it is paper about Volvocan ECU details description
https://www.asee.org/documents/zones/zo ... Fs/169.pdf

Tools for flashing and logging ME7 and ME9 memory with DiCE tool. Initially written by dream3R :
https://github.com/prometey1982/VolvoTools

T5Luke · Post by **T5Luke** » 05 Apr 2021, 04:55

Dice is just a CAN communication tool, with code the cem can be written by can bus, so the tool exactly doesnt matter. But to be able to write you need to upload a bootloader program into CEMs RAM before, without you have no flash writing functions.

blasaab · Post by **blasaab** » 07 Apr 2021, 13:00

Thanks for all help here. And thanks T5Luke for support, i had PC error but after changed PC i got Read from car directly. Looks like it Read strange

blasaab · Post by **blasaab** » 07 Apr 2021, 13:43

8volt on battery wasent enough

Did the test om doner car but teensy seems to work

T5Luke · Post by **T5Luke** » 07 Apr 2021, 15:02

Set minimum latency that is displayed to 60us, at the moment it should be set at 80us and it seems you have a cem with fast bootloader that responds at 60us.

sparacis · Post by **sparacis** » 10 Apr 2021, 08:26

This thread is awesome, thanks to everyone who has contributed

5ft24 · Post by **5ft24** » 11 Apr 2021, 11:03

I have been working off vtl's github experimenting on my 2005 XC90 V8. Finally got tired of the breadboard, wondering about crosstalk, EMI etc, so drew up his schematic in Eagle CAD and designed a PCB. Yes, I screwed up and called the project CIM cracker instead of CEM LOL
I've attached a photo and the zip of the eagle project, complete with gerbers. I sent the gerbers off to SEEED studio and for 2.49 plus shipping, in 1 week had 10 boards back.
BOM is also attached. didn't add the teensy or the female pin headers for it as I had those already.
Enjoy!

: Photo of assembled board

T5Luke · Post by **T5Luke** » 11 Apr 2021, 11:25

And did you have success with this board on V8?

Vida CEM swapping

Re: Vida CEM swapping