StickOS
DI-159 PLC Hardware Manual
Timers
StickOS supports up to four internal interval timers (0 thru 3) for use by the program. Timer
interrupts are delivered when the specified time interval has elapsed since the previous interrupt
was delivered.
Timer interrupt intervals are configured with the statement:
configure timer
n
for
m
(
s
|
ms
|
us
)
This configures timer
n
to interrupt every
m
seconds, milliseconds, or microseconds.
Note that the minimum timer resolution is the clock tick, which is 0.25 milliseconds.
The timer interrupt can then be enabled, and the statement(s) to execute when it is delivered
specified, with the statement:
on timer
n statement
If
statement
is a "
gosub
subname
...", then all of the statements in the corresponding sub are
executed when the timer interrupt is delivered; otherwise, just the single
statement
is executed.
The timer interrupt can later be completely ignored (i.e., discarded) with the statement:
off timer
n
The timer interrupt can be temporarily masked (i.e., held off but not discarded) with the state-
ment:
mask timer
n
And can later be unmasked (i.e., any pending interrupts delivered) with the statement:
unmask timer
n
Examples
>
10 dim ticks
>
20 configure timer 0 for 1000 ms
>
30 on timer 0 do print "slow"
>
40 configure timer 1 for 200 ms
>
50 on timer 1 do gosub fast
>
60 sleep 3 s
>
70 print "ticks is", ticks
>
80 end
57
Summary of Contents for DI-159
Page 51: ...StickOS DI 159 PLC Hardware Manual 4 is even _ 51...
Page 76: ...DI 159 Block Diagram 76...
Page 77: ...Dimensional Drawing 77...
