lcd4linux-users

[lcd4linux] Driver manual

[Theo S. <to...@sc...>]

Hi there,

i will write an driver for my lcd. So i read README.Drivers. At line 10,
i read: use Skeleton.c, but cant find Skeleton.c? Also on line 39, "edit
display.c"?

Is there any newer readme, or where are this files?

mfg
Theo

(Sorry for my bad english)

Re: [lcd4linux] Driver manual

[Martin H. <ma...@he...>]

Hi Theo,

> i will write an driver for my lcd. So i read README.Drivers. At line 10,
> i read: use Skeleton.c, but cant find Skeleton.c? Also on line 39, "edit
> display.c"?
> 
> Is there any newer readme, or where are this files?
the README.drivers file is hopelessly out of date, and I'm afraid
there's not much up to date information available on writing a driver at
the moment.
https://sourceforge.net/mailarchive/forum.php?thread_id=8214647&forum_id=37243
should give you a place to start (depending on the driver - this one
talks about serial displays, if yours is connected via parallel port or
something else, you'll obviously have to take a look at other drivers,
like the HD44780 driver, for example).

I hope that helps.

Martin

Re: [lcd4linux] Driver manual

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

Hi Theo,

> i will write an driver for my lcd.
Great!

> So i read README.Drivers. At line 10,
> i read: use Skeleton.c, but cant find Skeleton.c? Also on line 39, "edit
> display.c"?

Oh... looks like this README is *really* old :-)

I can think of two solutions:

- get README.Drivers up to date
- remove README.Drivers

I vote for the second one :-)


I'm afraid there is no current readme. But I can help you. Writing a new
driver should be quite easy, but adopting all the autoconf stuff is a
bit tricky...

First of all, you should use the CVS version. Otherwise it will be very
hard for me to adopt your changes. If you need help with CVS, let me know.

What kind of display is it? Have you got a data sheet? This way I can
tell you which existing driver is most similar, and you could use it as
a starting point (HD44780, as Martin suggested, is probably the most
complex driver available, so it may be a bad idea to use it asa basis
for a new driver)

I could prepare the framework (including all the autoconf stuff) for you.


bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781

Re: [lcd4linux] Driver manual

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

Hi Theo,

>  Hi Michael, Hi Martin,
I'm afraid Martin did not read your mail :-( because you sent it to me
only. Please make sure that your mails go to
lcd...@li...

> The lcd = http://tilofranz.net/lcdshop/index.html
> from: http://wallbraun-electronics.de
Look cool! But it's quite expensive, isn't it?

> M. Wallbraun send me an beta linux lib to test the lcd. The lib work
> fine, but now i will test it with lcd4linux.
> 
> I read some sources from lcd4linux, but dont know how i tell lcd4linux
> that there is an new driver.

I'm pretty sure it will be a new driver. If you can send me a data sheet
and/or the lib from Mr. Wallbraun, I can help you with starting the
driver...

bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781

Re: [lcd4linux] How to write a new driver

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

Hi there,

> i will write an driver for my lcd. So i read README.Drivers. At line 10,
> i read: use Skeleton.c, but cant find Skeleton.c? Also on line 39, "edit
> display.c"?
> 
> Is there any newer readme, or where are this files?

Ok guys, I just added a new 'drv_Sample.c' to the CVS repository (same
as 'plugin_sample') and added two new pages to the Wiki:

https://ssl.bulix.org/projects/lcd4linux/wiki/driver_howto
https://ssl.bulix.org/projects/lcd4linux/wiki/plugin_howto

I hope this is a good starting point for developers new to lcd4linux.
Comments are welcome. Additions/Corrections in the wiki are even more
welcome :-)


bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781