Thanks for the reference to Wikipedia...I had forgotten that its almost the universal reference guide now. There appear to be some good links on adaptable implementations if I can't find a Prop one aleady done.
From working with modbus at Square D/Modicon many years ago, I remember that it is not a straight forward async protocol, but has some critical inter-byte timing issues to keep the data flowing, although a lot of the implementations try to ignore them, creating non-standard "standard" implementations.
This project is a video display panel for a battery monitoring system, for which the Prop seems to be a good fit.
I'm tooling with a hybrid serial/parallel protocol right now. more of a rough draft... Semi synchronous, scalable 4/8/12/16 bit wide + Strobe. Commands are bidirectional (send/receive), traditional control bus for parallel interface is integrated on databus, CRC checksum disable feature, Auto baud rate feature. Ping/pong timing for sync (no standard timing). It's designed as a high speed bidirectional interface between two or more props.
Post Edited By Moderator (Chris Savage (Parallax)) : 10/14/2008 3:55:44 PM GMT
cimplex
Posts: 11
Comments
From a glance at wikipedia about the topic it doesn't look too hard to do:· http://en.wikipedia.org/wiki/Modbus
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Timothy D. Swieter, E.I.
www.brilldea.com·- Prop Blade, LED Painter, RGB LEDs, uOLED-IOC, eProto fo SunSPOT, BitScope
www.sxmicro.com - a blog·exploring the SX micro
www.tdswieter.com
Thanks for the reference to Wikipedia...I had forgotten that its almost the universal reference guide now. There appear to be some good links on adaptable implementations if I can't find a Prop one aleady done.
From working with modbus at Square D/Modicon many years ago, I remember that it is not a straight forward async protocol, but has some critical inter-byte timing issues to keep the data flowing, although a lot of the implementations try to ignore them, creating non-standard "standard" implementations.
This project is a video display panel for a battery monitoring system, for which the Prop seems to be a good fit.
-Joe
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Timothy D. Swieter, E.I.
www.brilldea.com·- Prop Blade, LED Painter, RGB LEDs, uOLED-IOC, eProto fo SunSPOT, BitScope
www.sxmicro.com - a blog·exploring the SX micro
www.tdswieter.com
Post Edited By Moderator (Chris Savage (Parallax)) : 10/14/2008 3:55:44 PM GMT