piclist 2001\10\31\181925a >
Thread: LCD panel init problems
www.piclist.com/techref/lcds.htm?key=lcd
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face BY : Bob Blick email (remove spam text)



On Wed, 31 Oct 2001, Jeff DeMaagd wrote:

> I have a 2x20 character LCD panel that doesn't seem to want to init properly
> on some power-ups.  We do have it and some 4x4 capacitive keypad circuitry
> connected to the main board by a fairly scandard type 6" / 15cm long ribbon
> cable.  Sometimes it powers up and inits properly, sometimes it displays
> garbage.  Once it starts fine, it runs fine until shutdown.  Once garbage,
> always garbage until shutdown.  A power cycling might change the situation,
> but that is not guaranteed.

Usually the times I have those problems is when I don't have big enough
delays - either before first talking to the display(give it time to reset)
and between each command(some commands take a long time to execute).

Hope this helps.

Cheers,

Bob Blick

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