Subject:
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Re: Manipulate the LCD in assembler
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 28 Aug 1997 12:34:50 GMT
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Original-From:
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David Negro <dln2@AVOIDSPAMcornell.edu>
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Viewed:
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1200 times
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At 11:28 PM -0400 on 8/26/97, German Gentile wrote:
Folks,
Ok, I took a look at the code last night. I found simple errors like not
initializing the stack, addressing variables in RAM chip when in single
chip mode and forgetting to use # for immediate data. Simple mistakes that
I have made more than my share. I cleaned it up however, and almost have
it working. It now seems to initialize the LCD correctly. I wrote a
routine to output 'A'-'Z' on the screen but instead it prints out:
'@BBDDFFHHJJLLNNPPRRTTVVXXZ'
Simple enough. Looks like the data line 0 is stuck low. Nope. I
immediately opened up interactive C without changing my setup, and it
worked fine. So what is the issue? I am very confused. If anyone is
willing to take a look at the code, please point your web browser to:
http://falcon.arts.cornell.edu/~dnegro/temp/Prueba4.a
or I can mail you the file.
Thank you,
-Dave Negro
P.S. I seem to remember being frustrated over the same issue while using
my miniboard a long while back. I can't remember how I fixed it. Any
ideas.
> I have write a code for manipulate the LCD in the handy board.
> Because i
> can't use a battery backed RAM, i need to write in assembler. Well , i'm
> really read all the FAQ for LCD and for Handy board (including the apendix
> B for the 6270) .I'm using the rigth for the init and i can't make the LCD
> clear or cursor blink... it's simply dead. Obviously, the LCD work in IC.
> All i get is the black blocks!!!!!!!!!! Please help me!!!!
> I send the code, anyone please take a look.
>
> Thanks friends... ;)
>
>
> German Pablo Gentile
> Systems Engineer. Electronics Expert. (really??? ;>) )
>
> ggentile@cvtci.com.ar
>
> Content-Type: application/octet-stream; name="Prueba4.a"
> Content-Description: Prueba4.a (A Archivo)
> Content-Disposition: attachment; filename="Prueba4.a"
>
> Attachment converted: Merlin:Prueba4.a (????/----) (0000663C)
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Message is in Reply To:
 | | Manipulate the LCD in assembler
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| I have write a code for manipulate the LCD in the handy board. Because i can't use a battery backed RAM, i need to write in assembler. Well , i'm really read all the FAQ for LCD and for Handy board (including the apendix B for the 6270) .I'm using (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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