4-line LCD Help - using PortA instead of B

[NavMicroSystems]

Tom,

You definitely don't have to worry about "initialisation" with PBP and a 44780 (or compatible),
PBP does it for you.

you have either got a bug in your wiring or your LCD is "dead" (or even both)

[bbarney]

I have to agree with Ralph,you have a short somewhere or bad connection.

[Tom Gonser]

OK, folks. Thanks for the help. I am going to rewire this to another LCD and see what happens. I agree something must have gotten messed up or fried, it just is not that complicated.

Tom

[nomada]

Hi to you all

I remembered that when I implemented Melanie's OLIMPIC TIMER with a Crystal Clear Technology LCD (with Hitachi controller) I couldn't have any character on dispaly until I set pull-ups on the four datas lines to LCD. I don't know if it could solve you problem, but I suppose it won't make things worst. maybe it deserves a try.

Sometimes components...

Have a nice weekend

ps. - lcd from CCT can be bought throw ARROW, they are cheap (!?), we use it in our vending machines and so far so good...

[Bruce]

If you're still using the 18F2525, then you need to change ADCON1 = 7 to ADCON1 = 15 or PortA is setup for A/D inputs, and you'll never get a response from your LCD.

[Tom Gonser]

Thanks, Bruce. I'll try that!

Tom

[Tom Gonser]

Made the change, and adjusted brightness -- WORKS!!

THANKS FOLKS.. It was the complexity of the 2525 and brightness adjustment that was holding me back.. Crystalfontz works fine. The support there is really good too!

Tom