//
//	P U B L I C   D E C L A R A T I O N S
//
typedef enum
	{
	sleepOK = 0,			// normal sleep, returned on seconds transition
	sleepMissed,			// sleep target passed before call to sleep
	sleepInterrupted,		// sleep terminated by an external interrupt
	cantSleepBadFSys,		// wont even try if <1.28MHz or > 16MHz
	cantSleepBadTickRate,	// low power sleep demands tick rate of 100
	cantSleepIRQ3Busy		// IRQ3 is being asserted so we can't sleep
	}	SLPResult;

typedef struct
	{
	unsint		sleepAt3V			:1;	// reduce power by reducing voltage
	unsint		sleepADshdn			:1;	// force the AD into shutdown
	unsint		sleepRSshdn			:1;	// force the RS232 driver to shutdown
	unsint		sleepZeroEvenSec	:1;	// sleep zero waits for next second
	unsint		sleepSpuriousRupt	:1;	// break on (catch) spurious interrupts
	unsint		sleepHandleIRQ1		:1;	// break on IRQ1 (RS232) interrupts
	unsint		sleepHandleIRQ2		:1;	// break on IRQ2 (unknown) interrupts
	unsint		sleepHandleIRQ4		:1;	// break on IRQ4 (unknown) interrupts
	unsint		sleepHandleIRQ6		:1;	// break on IRQ6/TP15 interrupts
	}	SleepPowerOptions;	
	
extern SleepPowerOptions	SleepOpts;

//	LowPowerSleep		- Sleep for a number of ticks relative to the last sleep.
SLPResult LowPowerSleep(ulong wakesecs);
//	LowPowerSleepTill	- Sleep until a specified time.
SLPResult LowPowerSleepTill(time_tt wakeup);