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From: jdsb@coachk.egr.duke.edu (John D. S. Babcock)
Newsgroups: comp.sys.handhelds
Subject: 48SX: Hardware project to receive I/R I/O
Message-ID: <1371@cameron.egr.duke.edu>
Date: 21 Mar 91 19:45:19 GMT
Sender: news@egr.duke.edu
Distribution: usa
Organization: Duke University EE Dept.; Durham, NC
Lines: 26


    One of my professors teached a VLSI design class in which we 
fabricate a 2000 transistor chip.  Since each student must come up
with a semester project, he was suggesting an infrared receiver to
receive the 48SX I/R, decode the kermit protocol, and send the data
to a PC.  I know you can do kermit on a PC, but he wanted the kermit
implemented on the CMOS chip.  All this so you don't have to plug
in a three wire I/O port.  Go figure.  However, it would be kind of
fun to design.

1. Are there I/R receivers that take care of most of the conversion so
   all you have to work with is digital signals?
2. Could Kermit be implemented in fairly simple logic (i.e. via a complex
   state machine)?
3. Where would he find a Kermit specification?
4. Which book would have enough detailed specifications for the 48SX
   infrared I/O port to make an interface that would receive from the 
   48SX?
5. Do I need two way I/R to do Kermit?
6. What I/R projects is anyone out there working on?  How much sucess have
   you had?

Please email responses.  Email if you want a summary.  Thanks!!
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J. D. Sterling Babcock             Duke University Electrical Engineering
jdsb@dukee.egr.duke.edu or jdsb@egr.duke.edu or att!egr.duke.edu!jdsb