Fellows,
sorry for offtopic...
Igot a problem.
Yesterday I bought winstar wh2004b LCD (4x20) and i cannot find a datasheet on
it.
As stated in brief discription, it uses ks0066 silicon inside which should
behave as
44780 one. BUt I faced with two problems (obviously, i assume that it should
act as 44780):
1. Timing - this lcd is shit slow. I used 2x16 lcd before and 500ns strobe was
Ok, now 4x20
requires at least 100us or more... (4 bit interface). I thought that for
44780 500ns
should be ok for any application. (minding 4x20 has 2 controllers inside, in
the worse
case 1us strobing should be ok)
2. It does not print 'p' and 'q' characters at all (I checked all chars 0-255).
If I print ascii character followed by non-ascii char (with code > 127), the
output
is broken (at least 3 chars broken after ascii->nonascii or nonascii->ascii
transition)
Is this an lcd problem or just my curly hands?
Another minor thing - does anybody know how to upload a custom charset to the
lcd?
Thanks,
~d
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