[Metalab] CAN-Bus - debug advice?

[overflo]

ohai


> Extended frames use more bits for the address (iirc 11 bit vs 29 bit).


aaaaah!



>>   - would i read ANY (wrong/different) data if i get the bitrate setting part wrong?


no, the bitrate settings are important, a wrong bitrate gives wrong CRC
and no data at all.


> I have no experience with that but I'd guess not as CAN has checksums for messages to detect errors during transmission. This would make receiving "random" messages due to a wrong bitrate very unlikely.


tested, true.

>>   - is there a reliable way to find out the correct bitrate used in the blackbox system?
> Using a scope is definitely one way I did it before (by measuring the bit timings. Some scopes can even detect the bitrate and decode the CAN packets on the fly).


the one i used at first try worked :)


>>   - any recommendations for FOSS software (linux) ?
> I'm using SavvyCAN. It's a bit clumsy to use and unstable at times but it's a very powerful piece of software.



coooool!

pretty much exactly what i need!


>
> I couldn't answer all your questions but I hope I could help a bit :P



youme helped a lot!


thank you very much :*
-flo