Enabling Apm; Disabling Apm; Entering Normal Mode - Intermec CK1 Programmer's Reference Manual

Chapter 2 — Configuring the CK1 System
Purpose: Enable the APM. If you use the devApmManual() to disable the APM
Syntax:
On-CK1 Parameters: None
On-CK1 Return: -1
On-Host Parameters: None
On-Host Return: Always return 0
Purpose: Disable the APM. The APM stops, but you can still use
Syntax:
On-CK1 Parameters: None
On-CK1 Return: -1
On-Host Parameters: None
On-Host Return: Always return 0
Purpose: Force the system into Normal mode when the system is in Idle mode,
Syntax:
On-CK1 Parameters: None
On-CK1 Return: -1
On-Host Parameters: None
On-Host Return: Always return 0
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Enabling APM

control by kernel, you can use this function to resume the APM to Work.
After enabling the APM, the CK1 automatically enters Idle/Standby
mode. You can use devApmSetIdleTime() or devApmSetStandbyTime() to
modify the time to enter these states.
int devApmAuto( void )
Function failed
0 Function succeeded

Disabling APM

devApmIdle()/devApmStandby() to force system into Idle/Standby mode.
You can use the devApmAuto() function to re-enable the APM. When
APM disabled, the Power key still works, so you can let the CK1 enter
Standby mode and return to Normal mode by pressing the Power key.
int devApmManual( void )
Function failed
0 Function succeeded

Entering Normal Mode

whether the APM enabled or not.
int devApmNormal( void )
Function failed
0 Function succeeded
CK1 SDK Programmer's Reference Manual