AVR-Chat

Nice tip... thanks... as it turns out.. I think the problem was that I'd left D[0..3] floating on the LCD



On Sat, 26 Nov 2005 09:58:37 -0800 (PST)
amol_deshmukh <aad_iit@yahoo.com> wrote:

> 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
> 
> 
> ________________________________________________________________________
> ________________________________________________________________________
> 
> 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.
> 
> 
> 
> ________________________________________________________________________
> ________________________________________________________________________
> 
> 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.
> > 
> 
>   
> 
> 
> 
> amol deshmukh
> mechanical engg.
> IIT-B, Powai ,Mumbai
> 		
> ---------------------------------
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