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mailing list for the eCos project.
Re: Non-char devices corrected
- To: Niclas Anderberg <niclas dot anderberg at bluecell dot ideon dot se>
- Subject: Re: [ECOS] Non-char devices corrected
- From: Jonathan Larmour <jlarmour at redhat dot com>
- Date: Wed, 20 Jun 2001 20:11:03 +0100
- Cc: ecos-discuss at sources dot redhat dot com
- Organization: Red Hat UK Ltd.
- References: <000c01c0f976$a3ba5a10$0928a8c0@pc103>
Niclas Anderberg wrote:
> > 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?
It is a deliberate decision in eCos not to have a kernel-space/user-space
divide, due to the overhead. So don't let that aspect make you think it
won't be generic.
Jifl
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