CANopen might be what you are searching for. On June 6, 2015 10:19:45 PM CEST, Philipp Burch <p...@hb9etc.ch> wrote: >Hi everyone, > >when we're talking about buses and interfaces, I'd like to bring up >another topic concerning me recently: We're building some kind of PLC >and motion controller mainly for internal uses, which is built around >FPGAs. Our FPGA configs are crafted specifically for what the devices >need to do, so there is no softcore or other microcontroller around. We >now have a simple serial interface connecting multiple boards using >differential pairs (RS-485-like) for RX and TX, transmitting frames of >some 64 bits each. This works, but is obviously completely proprietary. > >Hence the question: Are there standard interfaces (call them buses if >you like, I don't mind) of similar complexity with open specifications >around? I personally like the idea of the summation frame method >(Summenrahmenverfahren in German) as is used by EtherCAT, but this >interface is overkill for us and also not "open" unless you are some >kind of "member". I found Interbus which seems to fit quite ideally, >but, again, is not as open as I'd like it to be and it also looks to be >kind of obsolete. > >Rough requirements would be: >- Usable for daisy-chaining (no common bus) >- Data rate somewhere in the range 1Mbps .. 10Mbps >- Serial with exactly one RX and one TX pair in each link >- Suitable for deterministic cyclic transfers with some tens of bytes >each > >Any ideas, hints, comments? > >Regards, >Philipp > > > >------------------------------------------------------------------------ > >------------------------------------------------------------------------------ > > >------------------------------------------------------------------------ > >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users
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