Metrologic Optimus R, Programming Manual

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Chapter 3 Terminal Specific Function Library 67
3.4.3 Beep Duration
Beep duration is an integer that is used to specify how long a beeper is activated with a
specified beep frequency; it is specified in units of 0.01 second. To set the beeper in
activation for one second, the beep duration should be set to 100.
Note: When the value of beep duration is set to 0, it will terminate the beeper sequence.
beeper_status
Purpose To check if a beeper sequence is undergoing.
Syntax int beeper_status (void);
Example while (beeper_status()); /* wait till a beeper sequence is completed */
Description
This routine checks if there is a beeper sequence in progress.
Return
If beeper sequence is undergoing, it returns 1.
Otherwise, it returns 0.
See Also off_beeper, on_beeper, play
off_beeper
Purpose
To terminate the beeper sequence.
Syntax void off_beeper (void);
Example off_beeper();
Description This routine terminates the beeper sequence immediately if there is a beeper
sequence in progress.
Return
None
See Also beeper_status, on_beeper, play
on_beeper
Purpose To specify a beeper sequence of how a beeper is activated.
Syntax
void on_beeper (int *sequence);
int *sequence; /* pointer to a buffer where a beeper sequence resides */
Example int two_beeps[ ] = {19, 10, 0, 10, 19, 10, 0, 0};
on_beeper(two_beeps);
Description
This routine specifies a beeper sequence to instruct how a beeper is activated.