zpBootEvent (Function)

This function will query the event which has caused the device to boot.

The boot events have the following precedence when multiple sources have been detected:

•Power Down has been called (see pmPowerDown).

•Hardware reset (reset switch used).

•Vibration (see zpPowerDown).

•Timeout (see zpPowerDown).

•Digital input 1 change.

•Digital input 2 change.

•External power applied.

•Software reset (e.g. boardReset, boardWatchdog, etc.)

If no change in system state can be detected, the function will return "-1". An example would be if the external power was removed and applied after entering Zero Power mode by using zpPowerDown.

Input:

None.

Returns: INT

Declaration:

FUNCTION zpBootEvent : INT;

Example:

INCLUDE rtcu.inc
 
PROGRAM example;
DebugFmt(message := "Reason for boot : \1", v1 := zpBootEvent());
BEGIN
  // boot once a day or on vibration
  zpPowerDown(Time := (60*24), Vibration := TRUE);
END;
 
END_PROGRAM;