[etherlab-users] failing dc-sync-check (and rtdm patch)

[Florian Pose]

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Am 14.02.2012 22:15, schrieb George Broz:
> Yes - the application cycle (as far as I can tell) should be
> synchronized to the return of rt_timer_read().
> 
> I've tried two methods: (1) a regular Xenomai task using
> rt_task_wait_period() (after setup with rt_task_set_periodic()),
> and
> 
> (2) a Xenomai task awoken on an interrupt/timeout using 
> rt_intr_wait() where the timeout period is calculated using
> rt_timer_read() on entry/exit from rt_intr_wait().
> 
> The period of the real-time task is set for 250 micro-seconds. 
> Xenomai task latency is on average in the 1 to 4 micro-second 
> range, sometimes seeing a datapoint in the 10 to 20 micro-second
> range.

This is how we do it:

http://etherlab.hg.sourceforge.net/hgweb/etherlab/etherlab/file/f07b08426fc9/tools/rt_appcore/rt_main.c
(see app_main_thread())

http://etherlab.hg.sourceforge.net/hgweb/etherlab/etherlab/file/f07b08426fc9/rtw/lib/ecrt_support.c
(see ecs_send())

- --
Best regards,
Florian
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