From: Michele Paselli <miguelon@tiscali.it>
To: <ecos-discuss@ecos.sourceware.org>
Subject: [ECOS] problems with RTC
Date: Tue, 10 Apr 2007 12:15:00 -0000 [thread overview]
Message-ID: <55208.1176207327833.JavaMail.root@ps5> (raw)
Hi all,
I'm developing a radio driver for an AT91 platform and I need to
change the time granularity in order to make some precise latency
measures. In order to have a frequency multiplied by 10 (1 KHz since
the default is 100Hz) I multiplied by 10 the CYGNUM_HAL_RTC_DENOMINATOR
parameter. I also modified the CYGNUM_KERNEL_TIMESLICE_TICKS parameter
in order to have the same timeslice interval as I would have in the
default conditions. The ticks are now indeed 1 every millisecond, but
the radio driver does not seem to work properly anymore. In particular,
the driver seems to miss come interrupts. The only call to a function
related to timers in the driver is a timeout counter but I multiplied
its value by 10 to have the same conditions as before. Can anyone
suggest me a possible cause? I think that the conditions for the driver
in terms of timing are the same as before, but maybe I'm missing
something.
Thanks a lot in advance.
Michele
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next reply other threads:[~2007-04-10 12:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 12:15 Michele Paselli [this message]
2007-04-11 9:13 ` Nick Garnett
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