Vida CEM swapping

[vtl]

Perhaps the bit timing code is wrong in your Arduino code? There are quite a lot of configuration options for the CAN bus. Bit sampling, synchronization etc.

It works on his car. Also MCP2515 Arduino library is that simple. CAN.begin() == CAN_OK and you're OK.

[stevedi]

I used this CAN hat for RPI https://www.waveshare.com/2-ch-can-hat.htm and it's better in almost every single way, in that it's wired internally to the correct pins, so it's plug n play and has no messy wires.

This is exactly the hat I use for all of my projects, it works really well but I couldn't for the life of me get it to crack the CEM pin by connecting it to the teensy via SPI (using old code meant for a shield). I ended up soldering wires from the teensy directly to the transeivers on the hat, and it worked perfectly first try using the new code.

[jamezcab]

my apologies this is a lab rat i ordered. obviously incorrect

Be a man and make it a CEM!

i know what your saying my friend but an xc90 is a large ornament if i brick cem

so here i have data read with arduino. at first i tried read all and opened in cem software but i think data is not complete lots of “ff” and some small data

so then i tried read security and have more data but dont know where to obtain pin?

why i cannot get complete read i dont know but i did remake connections a few times

[dikidera]

Memory which is not programmed is occupied by 0xFF bytes. This is normal. It's only when you do 2-3 reads and all of them have differences is when you should be concerned.

[jamezcab]

Memory which is not programmed is occupied by 0xFF bytes. This is normal. It's only when you do 2-3 reads and all of them have differences is when you should be concerned.

please take a look at attached

[T5Luke]

Think you have some connection error, data doesn't look right to me

if you read from 0x0000 you should get something like this:

Code: Select all

00000000  00 FF D2 00 00 00 08 00 00 00 04 24 00 00 04 24  .ÿÒ........$...$
00000010  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000020  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000030  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000040  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000050  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000060  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000070  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000080  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000090  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$

[jamezcab]

Think you have some connection error, data doesn't look right to me

thank you i will try again tomorrow

[jamezcab]

Think you have some connection error, data doesn't look right to me

if you read from 0x0000 you should get something like this:

Code: Select all

00000000  00 FF D2 00 00 00 08 00 00 00 04 24 00 00 04 24  .ÿÒ........$...$
00000010  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000020  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000030  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000040  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000050  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000060  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000070  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000080  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$
00000090  00 00 04 24 00 00 04 24 00 00 04 24 00 00 04 24  ...$...$...$...$

thank you it appears that you must use power supply for arduino when using the 5 volt output to supply the cem

[T5Luke]

This looks perfect...
I power the cem by 12V to its connector...

[jamezcab]

is this file good? still cant make work with cemtool but i cannot make into .bin