8 Apr
2005
8 Apr
'05
5:17 p.m.
On Fri, 2005-04-08 at 12:37, Lee Revell wrote:
On Fri, 2005-04-08 at 06:24 -0700, nobin matthew
wrote:
I'm not sure why he's trying to do this because for audio the latest
patched kernels appear to be more than adequate. That said, I don't
think you can get a guaranteed 15 microsecond interrupt response with
anyone's patches to the standard kernel. I wouldn't call what we have
now hard real-time. More like soft real-time. Maybe when MontaVista
gets done...
Jan
I am porting pxa audio driver to rtlinux
(rtlinux
pro). I am mainly using pxa-ac97.c &
pxa-audio.c(eliminated sound_core.c). I will try to
register to two devices /dev/dsp and /dev/mixer in
that. Since RTlinux kernel api are not much documented
it seems very difficult to port dma and
synchronization.
Is it possible to use dma in rtlinux(since it needs
dynamic memory allocation).
I am sending the source code. can anybody tell me how
to port this.
Personally I think you're wasting your time. Ingo's RT preempt patches
let you do hard realtime with Linux using the existing driver base.