An LCD display connected to a PIC requires a minimum of 6 port pins.
With small pin-count PICs, this can be a problem.

Many years ago, when the Basic Stamp came out, some clever chap provided
a serial LCD display - it used RS232 - to reduce the pin count (this was
in the days of the 16F84).

I want to do the same thing but using SPI. (I just want it for myself -
I don't plan on producing anything). I can always get a chip with SPI
hardware to use as the LCD driver, but I though I would try it with a
couple of chips I have on hand, using software SPI.

I've done SPI master in software - no problem. It seems to me that doing
the slave shouldn't be difficult at all - it is really a very simple
system. I've search the Internet to see if there are any software slave
implementations out there, but no luck. Rather than re-invent the wheel,
do any of you know of any?=20


--=20
Larry Bradley =20
Orleans (Ottawa) Canada=20

--=20
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