AVR-Chat

At 08:38 PM 5/6/2004 -0400, John Johnson wrote:

>I've been working on an LCD project for two (3?) days now, and still 
>have nothing to show for it. I'm trying to use 4 bit mode. I was 
>originally driving a PCF8754AN using I2C, which was in turn connected 
>to the LCD. I gave up on that this morning and switched over to driving 
>it directly from PORTB. Still no joy. Used someone else's library, 
>nothing. I've looked at the signals using DigiTrace, and they're doing 
>exactly what they're supposed to. Tried another LCD, still nothing. The 
>LCD stays blank, although at times I see garbage characters, and once a 
>flashing cursor. I've tried code written in WinAVR, and even tried 
>BASCOM, which is my emergency backup language just to see the hardware 
>is sound. Nothing.

Did you try this LCD on another working system?

When in doubt, stretch the delays to double.