Subject:
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Re: serial connection
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 23 Apr 1997 12:49:06 GMT
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Original-From:
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Fred G. Martin <fredm@media#spamcake#.mit.edu>
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Viewed:
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2415 times
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Tunde Gyurics wrote:
> I am still trying to get the PC-Handyboard connection to work. I got as
> far as downloading the pcode_hb.s19 file successfully. After I turn the
> main board power off and back on (reset), I should get a message on the
> LCD screen ("Interactive-C v 2.81 9/28/93...") but instead the LCD screen
> just stays lit on, without displaying any messages.
and then Chuck McManis wrote:
> Your LCD is bad. Either the logic to it is in error (check for
> an open on the E pin) or the LCD itself is non-functional.
> If IC cannot talk to the LCD it won't run.
Not necessarily. There could be a problem with the memory circuit
that is preventing pcode_hb.s19 from loading properly.
Tunde, use a multimeter to check all of the connections in the memory
circuit (including the 'hc373 chip). Make sure there are no adjacent
shorts, and that all wires that should be connected are connected.
-Fred
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Message is in Reply To:
 | | Re: serial connection
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| (...) Your LCD is bad. Either the logic to it is in error (check for an open on the E pin) or the LCD itself is non-functional. If IC cannot talk to the LCD it won't run. (28 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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