> Please consider I want to change as little as possible from the driver,
> and just ensure garanteed latency response time for the interrupt handler,
> and no more (which would require rewritting the user-space application)
Try the method from:
http://rtlinux.cs.nmt.edu/~rtlinux/rtl.w5archive/9905/msg00100.html
You need to split your interrupt handler - to use request_RTirq for the
interrupt service part, collect the data and then trigger a normal interrupt,
which does the rest of the job.
Or alternatively write the data to RT-FIFO in RT-ISR.
Since I have also the labpc-1200 card, I should be able to help you to debug
the code.
--
Tomek
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