Vida CEM swapping

matija0610 · Post by **matija0610** » 07 Oct 2022, 21:48

: Screenshot_2.png (65.89 KiB) Viewed 830 times

8-bit SUM whole CONF block
I think everything is clear in the picture

ele288 · Post by **ele288** » 08 Oct 2022, 02:44

Thank you, looks simple. What editor are you using?

matija0610 · Post by **matija0610** » 08 Oct 2022, 04:39

ele288 wrote: 08 Oct 2022, 02:44 Thank you, looks simple. What editor are you using?

HEX Workshop

ele288 · Post by **ele288** » 08 Oct 2022, 05:10

Thank you. I'll try and report the results

oscilloscope · Post by **oscilloscope** » 08 Oct 2022, 11:37

ele288 wrote: 07 Oct 2022, 16:09 You can use cem cracker or read directly from cpu and find the pin. If you look at page 9 there is details where the config is, but if you change any byte you have to recalculate checksum but can't figure this out yet

Page 9 From what the microcontroller datasheet or something else ?

ele288 · Post by **ele288** » 08 Oct 2022, 15:05

Page 9 of this thread

5ft24 · Post by **5ft24** » 08 Oct 2022, 15:43

vtl wrote: 27 Sep 2022, 16:35
konielian wrote: 27 Sep 2022, 13:32 I am also interested on making an app which can write back by DiCE the modified flash into the car, thanks to T5Luke, on 28f400 cem that is possible but in the M32C CEM is still not solved.
Solve it! Register at Renesas web site, download M32C datasheet and development environment. Renesas E8/E8a is slightly over $100 on Ebay. You will need a donor CEM, too. Once you have a flash-writing SBL ready, you are basically done. The CAN proto is very simple and wouldn't take long to implement.

Registered on their site. No datasheet for the M32C, and can't find a dev environment to dl there either

5ft24 · Post by **5ft24** » 08 Oct 2022, 16:18

Finally found the HEW/compiler/debugger etc, but still no data sheet for the M32C

oscilloscope · Post by **oscilloscope** » 08 Oct 2022, 17:17

5ft24 wrote: 08 Oct 2022, 16:18 Finally found the HEW/compiler/debugger etc, but still no data sheet for the M32C

Are you refering to the older brick style cem with the MC68376 ? Or is there another one which uses the 400 flash memory externally?

oscilloscope · Post by **oscilloscope** » 08 Oct 2022, 17:39

Is this what you're after?