AVR-Chat

hi
i was stuck up with LCD for about half a month for a very small reason. i too had done everything correctly.
i was trying to use LCD with AtMega16 in 4 bit mode using Port C. the JTAG bit on Port C wasnt diabled and for this tiny thing could not get LCD running. u might wanna check into that.

--
Amol Deshmukh
3rd Yr. Undergraduate
Dept. of Mechanical Engg.
IIT - Bombay, India

Message: 1
Date: Fri, 25 Nov 2005 13:50:35 -0800
From: James Washer
Subject: Help debugging LCD display issues

I'm using an Optrex DMC16207 (HD44780) LCD display with a Mega32 and Peter Fleury's LCD library.

Using the include test file, upon power-up, the top row of the display shows all 16 cells "lit" (darkened) with EVERY bit position darkened (i.e. a rectangle). The bottom row is blank.

I've checked and checked that all is hooked up well, but nothing changes... any ideas?

thanks

- jim


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Message: 2
Date: Fri, 25 Nov 2005 20:52:52 -0600
From: David Kelly
Subject: Re: Help debugging LCD display issues


On Nov 25, 2005, at 3:50 PM, James Washer wrote:

> I'm using an Optrex DMC16207 (HD44780) LCD display with a Mega32
> and Peter Fleury's LCD library.
>
> Using the include test file, upon power-up, the top row of the
> display shows all 16 cells "lit" (darkened) with EVERY bit position
> darkened (i.e. a rectangle). The bottom row is blank.

Thats what an HD44780 looks like when its uninitialized.

My guess is that you are not talking to it at all.

--
David Kelly N4HHE, dkelly@HiWAAY.net
========================================================================
Whom computers would destroy, they must first drive mad.



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Message: 3
Date: Fri, 25 Nov 2005 20:51:57 -0800
From: James Washer
Subject: Re: Help debugging LCD display issues

Yes, I'm beginning to think that is the case. Thanks

- jim

On Fri, 25 Nov 2005 20:52:52 -0600
David Kelly wrote:

>
> On Nov 25, 2005, at 3:50 PM, James Washer wrote:
>
> > I'm using an Optrex DMC16207 (HD44780) LCD display with a Mega32
> > and Peter Fleury's LCD library.
> >
> > Using the include test file, upon power-up, the top row of the
> > display shows all 16 cells "lit" (darkened) with EVERY bit position
> > darkened (i.e. a rectangle). The bottom row is blank.
>
> Thats what an HD44780 looks like when its uninitialized.
>
> My guess is that you are not talking to it at all.
>
> --
> David Kelly N4HHE, dkelly@HiWAAY.net
> ========================================================================
> Whom computers would destroy, they must first drive mad.
>