apps, Resetting system clock with interrupt handler?

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apps >> Resetting system clock with interrupt handler?

by jchludzinski@gmail.com » Fri, 26 Aug 2005 23:45:54 GMT

I have project using a GPS device in what we call a "player unit". The
player unit is a small AMD Geode (x86) based device running Linux. The
GPS is a PCI part connected to INTD (PCI INTx). It submits interrupts
every second which need to be caught and used to reset the system time
with - thereby synchronizing the entire (wireless) network of player
units.

1) How do associate a handler with this interrupt?

2) What is the best system call to reset the the system clock? (I
assume I really don't want to reset the hardware clock?)

---John


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apps >> Resetting system clock with interrupt handler?

by jchludzinski@gmail.com » Sat, 27 Aug 2005 00:36:45 GMT


I assume the answer to 1) is request_irq(...) found in
/usr/include/linux/interrupt.h? ---John



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apps >> Resetting system clock with interrupt handler?

by Kasper Dupont » Sat, 27 Aug 2005 07:35:32 GMT




I guess the solution is to make a driver that will
allow ntpd to use the device as timing source.

--
Kasper Dupont
Note to self: Don't try to allocate
256000 pages with GFP_KERNEL on x86.

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Resetting system clock with interrupt handler?

by John Hasler » Sat, 27 Aug 2005 09:43:15 GMT

Kasper Dupont writes:

Or install an existing driver if one exists for your device or use NMEA if
your device supports it.
--
John Hasler
XXXX@XXXXX.COM
Dancing Horse Hill
Elmwood, WI USA

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