On Wed, Dec 22, 2010 at 2:41 PM, Poul-Henning Kamp <[email protected]> wrote: > In message <[email protected]>, > Chri > s Albertson writes: > >>Can "CAN" do this? > > CANbus is mostly intented for hostile environments, and for anything > "in-box" less can do. > > The problem with I2C is that it is not well suited for systems with > more than one master on the bus. It can be done, but it's messy. > > MODBUS is also an option.
Quick reading says that MODBUS allows only one master unless the physical media is TCP/IP over Ethernet. I don't think we want something that complex. How hard is it to do multi-master I2C. I still like I2C because it can be doe on the smallest of uP with zero extra hardware. But something else might be better. If I try to make a prototype I2C multi-master system what are some problems I should look out for. I think prototypes or simulations are the way to decide this. Seems we are not going to know which is best for this purpose without taking each proposal to the next level of design detail Maybe we should have a budget in square mm and dollars for bus interface would be good to say "100 mm^2 and $2. but I don't know what's realisticMaybe use those numbers as a figure of merit when comparing two designs -- ===== Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
