RE: [Emc-users] Serial to Pic IO Controller

[Jim F. <ji...@em...>]

1-wire, fun stuff.  I have a nice 1-wire library but for AVR
microcontroller.  Dallas/Maxim have come out with very interesting chips in
the last few years.

For those who don't know, 1-wire is good for temperature monitoring. They
have other 1-wire devices but the temperature chips was one of the first
ones released and I have a few of them here. They can be easily attached to
stepper/servo motors/driver heatsink to sense overheating.  Multiple
(hundreds???) 1-wire devices can be connected together using the same 2
wires, somewhat like a string of Christmas lights. Why 2 wires when it is
called 1-Wire?  Well you need a ground return wire.

Easy to implement if needed.

for onboard PIC programmer, I was thinking of implementing the popular JDM
serial port programmer on board. Doesn't take many parts. Anyone can the
flash new firmware into the PIC using a available free linux or windows
program.

Jim


-----Original Message-----
From: emc...@li...
[mailto:emc...@li...]On Behalf Of Mark Pictor
Sent: Monday, January 05, 2004 9:19 PM
To: emc...@li...
Subject: Re: [Emc-users] Serial to Pic IO Controller


For whoever writes the code, if you want to include
1-wire protocol, I think I can dig up some asm I wrote
for the F84 a while back to do this.  As implemented,
it does not deal with device serial numbers, so it's
limited to one device per PIC pin used - but that
should be pretty easy to add.

For the roll-your-own, it would be nice to include
programming capability onboard - or use a PIC which
can re-program itself.