gnupic: Re: [gnupic] Connecting an LCD Display to RS232 Interface
Subject:
Re: [gnupic] Connecting an LCD Display to RS232 Interface
From:
"Deadly Earnest" ####@####.####
Date:
7 Apr 2006 16:16:47 +0100
Message-Id: <dea40b2c0604070816o7c57e85ft34ccd18efb6b63cb@mail.gmail.com>
>> It could also be a serial interface to another micro, and in that case
>> it could be SPI.
>
>a very good point. Could be I2C as well. Maybe the original poster can
>find an oscilloscope in order to analyze the signals on those wires
>(again, assuming that the original device still functions!) to figure out
>the protocol used on those lines.
Original poster here people. I'm sorry this stuff has only come to light as
the company is moving premisis. The device is an embedded device and
everybody who worked on it has left and I can't find any documentation on
it.
Basically I'll try and see if it's a serial link and if not then I might be
able to look into SPI and I2C. I never even thought of those. what ever it
is there's a PIC processor on the other side of the three wires so if the
worst comes to the worst I might be able to suck the code out of it and have
a look at it. Actually that might be the easiest option. The chip is a
PIC16C62A surface mount.
I'll let you know how I get on. I just found one in good order and managed
to get it powered up. Sweet. I've got nearly 20 16x4 character LCDs to play
with. I'll have LCD's on everything by the time I finish if I work out the
protocol. I've no silly scope and I'm only starting so I'm not going to buy
one just yet. I'll try find out if I can get my hands on one.
Don't come back and tell me that by salvaging these I'm saving myself a few
pence I don't want to know ;-)
thanks for all your advice
John Whitmore
PS just getting into this and picked up the picclite compiler. I'd like to
use linux tools as much as possible but went of half cocked and got a
Vellman K8048 PIC Programmer so I'm on the windows for that. Oh well next
time
