It looks like there are others out there. sigh...... I
need to buy here and there until I get a right
one........ QC really kills enthusiasm. 

I managed to get weird characters printed randomly
during quick reset but solved it by discharging the
LCD of mine each time before init it..... Please do
inform the PICLIST on how you solve your problem.

Thanks,
John




--- Phillip <pcoiner@gpssource.com> wrote:

> 
> 
> Hi John
> 
> I was using an LCD from Hantronix last year that
> would get into a latch up
> state when I reset my pic.
> 
> 
> I put pull ups (and maybe pull downs, I'm not at
> work and my one remaining
> brain cell is holding my name) on the RS, enable and
> W/R lines and I was
> able to keep it straight most of the time.
> I canned the thing half way through development and
> went to a Crystalfontz
> because it was not RoHS compliant.
> 
> The Crystalfontz will crap out if I write to it
> when/if it is busy.
> When I turn the port around on my PIC 18F6520 from R
> to W or vise versa if I
> don't put a 50usec delay before I read or write the
> data does not either go
> to the thing (out the port) or come from the thing
> (in the port) and I blow
> on by to the next read or write life turns to carp.
> I don't think it is capacitance on the lines (like
> the long cable guy
> earlier) they are very short.
> Mostly I do RF stuff here so I have a good idea
> about capacitance of my
> boards.
> I swear there is some kind of turn around where you
> can read/write the port
> fast after it is turned around but you have to wait
> till it is ready to go. 
> I'm going to do some more testing AM.
> I'll figure it out eventually.
>  Phillip
> Things should be as simple as possible but no
> simpler
>  
>  
>  
> Phillip Coiner
> CTO, GPS Source, Inc.
>  
>  
> Your source for quality GNSS Networking Solutions
> and Design Services, Now!
> 
> -----Original Message-----
> From: piclist-bounces@mit.edu
> [mailto:piclist-bounces@mit.edu] On Behalf Of
> kravnus wolf
> Sent: Sunday, April 02, 2006 11:18 PM
> To: Microcontroller discussion list - Public.
> Subject: [PIC] LCD sanity
> 
> I have written code for the LCD from bgmicro
> 
>
http://www.bgmicro.com/prodinfo.asp?sid=0968912037037037604814310&prodid=LCD
> 1022&page=1&cri=lcd&stype=3
> 
> I managed to get it started and printing characters
> on
> it. What grips me is that if I reset the PIC through
> MCLR quickly and numerous times the LCD just prints
> blank! It seems that the LCD cannot handle quick
> restart over and over again. I am left
> clueless........
> 
> Thanks,
> John
> 
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