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Commands - 90

ON TICK

Tasking Statement

SYNTAX: ON TICK n,t GOSUB line/label

ON TICK n,t GOSUB

PURPOSE: To cause periodic program branching.

REMARK S: This statement is used when periodic tasks must be executed. The GOSUB is executed every t

seconds. n is the tick number and ranges fr om 0 to 2. Up to 3 ON TIC K subrou tines can exec ute

simultaneously.

There are three TICK timers in CAMBASIC. The parameter n ranges from 0-2. The TICK timers

are independent of each other.

The range of t is 0.005 to 327.68 seconds. The GOSU B branch occurs every t seconds unless the

second syntax is executed. Not specifying a line number or label after GOSUB disables the ON tick

subroutine.

Every t seconds an interval flag is set. At the conclusion of the current CAMBASIC command, a

GOSUB branch occurs.

See Multitasking Chapter for more information.

RELATED: CLEAR TICK, TICK

EXAMPLE: 10 ON TICK 1, 1 GOSUB 50

20 PRINT "*"

30 FOR X=0 TO 600:NEXT

40 GOTO 20

50 PRINT TICK(1)

60 RETURN

ERROR: < Data negative> – for t and n

< Data out of range> - if n > 2

< Time> 327.67 sec> - for t

< Can’t compile> – if line/label does not exist

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Remote-processing CAMBASIC Manuale Utente Pagina 123