On Mon, May 11, 2009 at 10:46 PM, Xiaofan Chen wrote: > I think the easier way is not to use RS485 and invent your own > multi-master protocol. For example, in the previous threads, > CAN or Ethernet are both recommended. What do you mean? Isn't RS485 the physical layer specification? I'm going to write my protocol over RS485. > It is possible to make RS485 multi-master but the hassle may not > be worth the efforts. One example here: > http://www.keil.com/forum/docs/thread8794.asp It was done with CAN via a twisted pair half duplex line, so I want to try to do it over RS485. For hobby purposes and low speeds, I should be able to cook something up. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist