Messages in this thread | | | Date | Wed, 24 Sep 2008 08:50:03 -0700 (PDT) | From | Bill Unruh <> | Subject | Re: parport_pc disables parallel port on unload. |
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On Wed, 24 Sep 2008, Bodo Eggert wrote:
> Bill Unruh <unruh@physics.ubc.ca> wrote: > >> I have a parallel port module gps.c which I have written ( after the short >> module described in Linux Device Drivers), whose purpose is to timestamp >> the occurance of interrupts on the parallel port Ack line to as high a >> temporal accuracy as possible.These are generated by the PPS line of a Gamin >> 18LVC gps receiver. Since I want the highest accuracy possible I do not want >> the latency of going through the stock drivers and waiting for a poll or >> select to let me know an interrupt has occured. > >> So, could anyone point me to some relatively comprehensible documentation ( >> or "canned program") to show me how to switch the parallel port back on if >> unloading parport_pc has switched it off. > > You can copy/paste the relevant parts from the parport_pc driver.
Of course, then, identifying the relevant parts becomes the problem, but thank you.
> >
-- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@physics.ubc.ca Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/
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