Re: [Lcd4linux-devel] progress report RE: HD44780 stuff

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

Hi Bill,

> I have a question on how things that slightly deviate from standard should be done.
> For example the CU series VFDs from Noritake/Itron. They are HD44780 compatible but
> contrast doesn't exist - Pin 3 goes nowhere. It's a brightness setting in software.
Never heard of these displays. Do you own such a thing?

> The relevant bits are R/W low, RS high, and put 0x00h-0x03h on the pins for 4 levels of
> brightness. Add a cfg_number "VFDBrightness" (or whatever) entry, the sprintf and the
> HD_write call and that's it. 
Should be easy to implement, indeed.

> It seems redundant duplicating the HD44780 driver for a slight variant.
Of course not, you are right. As things like "Contrast", "Brightness" 
and so on are generally implemented as "plugins" and not hardcoded, we 
can register any function we want to.

If you have access to such a display, would you be willing to implement 
this feature?

bye, Michael

-- 
Michael Reinelt                                   Tel: +43 676 3079941
Geisslergasse 4                                   Fax: +43 316  692343
A-8045 Graz, Austria                          e-mail: re...@eu...