I'm looking to interface to a commercial vehicle's CANopen (IFM system) bus. My application is an on board weighing system that needs to simply 'squirt' 8 bytes onto the bus, twice a second for processing by others. The existing weigher is 8052 based and already has serial comms and around 20kB of spare app ROM - but very little RAM or XRAM spare. It's coded in assembler. Projected numbers are <100pa.

I'm thinking the obvious route is to buy in a commercial interface module (typically Anybus). However, in view of the tiny data packet, I can't help thinking I ought to be able to embed code and simply add the hardware layer components. Trouble is, the software development time can't be justified. There is a commercially available C package, but it's C - and I can't afford the resource - plus, I can't/won't do C (sorry Erik).

I already have my own developed ModBus and Profibus options embedded - but can't face, or justify, another full development project...

Has anybody any suggestions? I'll consider any commercially justifiable deal if someone's already 'invented the wheel'. I presume bus's (wheeled variety) use a similar bus these days Erik?

Regards to all,

Dave