rt_busy_sleep and rt_task_wait_period

[Paolo Mantegazza]

Yang Huang wrote:
> Hi list,
> 
> A newbie's confuse about the difference between rt_busy_sleep and
> rt_task_wait_period, when being used to suspend a task: rt_busy_sleep
> takes the Time Stamp Clock as reference while rt_task_wait_period
> takes the Real Time Clock(8254), when the clocks are available. Is it
> correct?
> 

No both use the same clock as assigned at start_rt_timer. Wait period is 
an easy wayt to use rt_sleep_until, i.e. something like doing:

RTIME period = nano2count(my_period_in_nanos);
RTIME t = rt_get_time();
while(1) { ...... rt_sleep_until(t += period); ..... };

Paolo.