LCD panel init problems
David VanHorn email (remove spam text)
At 05:22 PM 10/31/01 -0600, Lawrence Lile wrote:
>Boy, I have the same problem. A real showstopper when you go to demonstrate
>a prototype. Usinf SEETRON 2X16 character LCD's. Anybody got an idea?
This is symptomatic of improper timing of signals.
Can you toss some nops into the lowest level routines, and stretch out the
setup and hold times?
It could be bounce and ringing on the cable.
A quick check would be to add a series network of 0.1uF and 120 ohm
resistors to each signal line.
This won't be a perfect match, but it's hard to measure cable impedance
through email :)
Dave's Engineering Page: http://www.dvanhorn.org
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