ZBasic System Library
280
ZBasic Microcontrollers
Type
Subroutine
Invocation
SetInterval(interval)
Parameter
Method
Type
Description
interval
ByVal
Single or int16
The interval counter period, in RTC ticks (if an integral
value is specified) or seconds (if a Single value is given).
Discussion
This routine sets the period of the built-in interval counter. On each RTC tick, the interval counter will be
decremented. When it gets to zero, it is reloaded with the specified value and it begins to count down
again. Furthermore, if a task is awaiting the interval expiration, it is immediately scheduled for execution
(unless a higher priority task requires service). If no task is awaiting the interval expiration, the fact that
the interval counter expired is recorded. Subsequently, a task may request a wait on the interval and,
depending on the nature of the request, the task may be immediately triggered or it may await the next
interval expiration.
Internally the interval period is stored as a 16-bit unsigned integer value. This limits the interval period to
a maximum of slightly less than 128 seconds. Of course, longer interval periods may be effectively
implemented by maintaining a counter and taking action after the expiration of a number interval periods.
Example
Call SetInterval(200) 'about 391 milliseconds
Call SetInterval(10.0) 'about 10 seconds
Compatibility
This routine is not available in BasicX compatibility mode.
See Also
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