Re: [Lcd4linux-devel] [lcd4linux] uClinux patch.

[Michael R. <re...@eu...>]

Hi Luis,

>> OTOH, if you like to have your 'own' driver, we could do so; 
>> but they would share some common code... maybe we could 
>> backport your changes later... just let me know what you prefer.
> 
> what I had in mind was something even less stressfull but maybe hard
> to make. and it is split the HD44780 driver even further so that
> the actual 'bus' connection is fully separated from the HD44780 core.
> 
> which would make things like supporting different connections even simpler

You are right, I've been thinking about such a solution, too. But let's
do this after a 0.10.1 (or 0.11) has been released :-)

OTOH, different HD44780 drivers do not share that much code.. If I think
about the various USB2HD44780 adapters, the only thing in common is the
display ram addressing scheme, and some CGRAM stuff. But with USB you
don't care about 4/8 bit, timings, wirings, and all that stuff that
makes the current HD44780.c *that* complicated.

Probably it would be easiest just to split the driver into bus-dependant
parts, and don't care about the common code. As a second step, take the
HD44780 drivers that are already extra files into account, and look for
common code, and try to find a clean and simple way to unify it.

For the time being, I'll implement the "HD44780-I2C" configure option;
which may be removed again.


bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://home.pages.at/reinelt
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