There are many resources on the net for CANBUS. There is nothing particularly
difficult about programing the CAN controllers, (2378 - needs their power
turning on in PCONP), except the Global Acceptance Filter. I would stay well
away from the GAF at first - leave it off and see if you can get two controllers
to echo messages. Both 2129 and 2378 controllers work OK once set up, generate
interrupts etc.
The GAF is a bit of a nightmare. It is awkward to setup all the ranges and
range-limit registers. That, and there are no bitmasks/wildcards on the filter,
only start address and length - that alone can defeat protocols that use ranges
of address bits to address different node classes and/or channels within nodes.
That, and the user manual says controller ID's start at 1 whereas they
actually start at 0, - I ranted about that recently on this group:)
No, I cannot provide any code, (it's C++, sucks in too many other modules,
uses the OS and it's not mine to post). There are some examples on NXP and
elsewhere - work through one!
Rgds,
Martin
