#ifndef LPSLEEP_INC
#define LPSLEEP_INC

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;
        
SLPResult LowPowerSleep(ulong wakesecs);
SLPResult LowPowerSleepTill(time_tt wakeup);
void      SleepUntil(time_tt WakeupTime);

#endif LPSLEEP_INC