[ECOS] Non-char devices corrected

["Niclas Anderberg" <niclas dot anderberg at bluecell dot ideon dot se>]

Sorry, I haven't slept for 28 hours. This is the corrected mail:

----- Original Message -----
From: "Niclas Anderberg" <niclas.anderberg@bluecell.ideon.se>
To: "ecos-discuss@sources.redhat.com"
<ecos-discuss-owner@sources.redhat.com>
Sent: Wednesday, June 20, 2001 12:15 PM
Subject: Non-char devices


> Hello!
>
> I am currently writing a device driver for eCos for a LCD device. On top
of
> the LCD i have
> a console for writing strings/chars on it. Right now I only want to use it
> for debugging, but in the
> future it would be nice to access the LCD directly and draw on it like a
> canvas.
>
> The console is pretty easy to implement, since the io interface seems to
be
> meant for char devices with write and read characters in a buffer. But if
I want
> to access the LCD directly, I would either have to wrap the drawing-info
in
> a buffer
> (not being too efficient) or make the
> drawing functions
> public property in the kernel hoping to access them directly from
userspace
> (which is probably
> possible since i don't have any MMU or well documented supervisor mode on
my
> chip).
> I would like a platform generic way of writing a display driver, and I am
> probably missing
> something. That is where you guys come in :). Any tips and hints?
>
> Thanks in advance
>
> Niclas Anderberg
>
> PS! I am using eCos 1.3.1 (not CVS).
>