I believe one would reduce the size using serial
through I2C. I am not sure though.

John

--- Maarten Hofman <cashimor@gmail.com> wrote:

> >
> > Try this LCD controller:
> >
> > http://www.myke.com/lcd.htm
> >
> > Less code and pins, using just a cheap CI 74LS174.
> 
> 
> Please explain how serial access to an LCD reduces
> the code size compared to
> full parallel access? I know it reduces the number
> of pins (though I would
> go for a three pin interface with a normal shift
> register, and not Myke's
> two pin interface... I never had much luck with
> that) but in my experience,
> it increases the code size: instead of a simple
> "move data to port, toggle
> enable" you now have to shift each bit separately
> and then toggle enable.
> 
> In Brent's case it doesn't really help either, as it
> would still result in a
> redesign of his PCB, which is the thing he is trying
> to avoid.
> 
> I do appreciate seeing the old example from Myke
> Predko coming back, though
> (I liked his book a lot).
> 
> Greetings,
> Maarten Hofman.
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