System; General - Metrologic Optimus S Programming Manual

20 "C" Programming Guide For Optimus S/R

3.1 System

3.1.1 General

ChangeSpeed
CheckWakeUp
_KeepAlive__
Purpose To change the CPU running speed.
Syntax void ChangeSpeed (int speed);
Example ChangeSpeed (4);
When high speed operation is not necessary, selecting slower CPU speed can
Description
save battery power. The parameter speed is set to one of the following values:
1 Sixteenth
2 Eighth
3 Quarter
4 Half
5 Full
Return None
Purpose To check the wakeup event.
Syntax int CheckWakeUp (void);
Example event = CheckWakeUp();
Description This routine checks on the wakeup event.
Return The return value can be one of the following:
POWER_KEY_PRESSED (1)
CHARGE_OK (2)
TIME_IS_UP (3)
Purpose To let the user program keep on running and prevent it from being
automatically shut down by the system.
Syntax void _KeepAlive__ (void);
The POWER key is pressed.
Charging is completed.
The alarm time is up.
Optimus S