Vasili Goutas wrote:
>
> Hi
> I'm using rtai-1.4 with linux-2.2.16.
> I have a problem using the function nano2count.
>
> rt_printk ( KERN_DEBUG
> "RTAI dmm16: going to make reading thread periodic. period = %lu,
> nano2count(period) = %lu\n", period, nano2count(period) );
>
> gives me the following output:
>
> <7>RTAI dmm16: going to make reading thread periodic. period =
> 500000000, nano2count(period) = 0
Above you try to write an %llu with just %lu. What you get is
unpredictable.
Note that you cannot use %llu within the kernel. You should be enough
with:
rt_printk ( KERN_DEBUG "RTAI dmm16: going to make reading thread
periodic. period = %lu, nano2count(period) = %lu\n", (usigned
long)period, (unsigned long) nano2count(period) );
> After the call of
> rt_task_make_periodic_relative_ns( &thread[DMM16_THREAD_READING],
> nano2count( start_time ),
> nano2count( period ) ) != 0 )
>
> the system freezes because of the task code wich will than runn
> permanent.
The above is used incorrectly, see the new PDF manual at:
http://www.aero.polimi.it/projects/rtai/.
Assuming delay_from_now and period are in nanoseconds it goes as:
rt_task_make_periodic_relative_ns(&thread[DMM16_THREAD_READING],
delay_from_now, period);
Even if you have no manual, rgrep the wealth of available examples and
you'll immediately get how it is used.
Ciao, Paolo.
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