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85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
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/*
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Copyright (C) 2011 James Coliz, Jr. <maniacbug@ymail.com>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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version 2 as published by the Free Software Foundation.
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*/
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/**
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* @file sleep.h
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*
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* Declaration of the sleep_c class.
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*/
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#ifndef __SLEEP_H__
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#define __SLEEP_H__
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/**
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* Enums for the duration of the watchdog timer
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*/
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typedef enum { wdt_16ms = 0, wdt_32ms, wdt_64ms, wdt_128ms, wdt_250ms, wdt_500ms, wdt_1s, wdt_2s, wdt_4s, wdt_8s } wdt_prescalar_e;
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/**
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* Simplified sleeping handler
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*/
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class sleep_c
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{
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public:
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/**
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* Enable the system to be able to sleep
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*
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* Does not actually do any sleeping.
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*
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* For example, to do something roughly evert minute, configure
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* it like this:
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*
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* @code
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* Sleep.begin(wdt_8s,7);
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* @endcode
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*
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* @param prescalar Duration of the watchdog timer interrupt.
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* The system will actually sleep for this long.
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* @param cycles Number of times the system will wake up before
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* returning from @p go().
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*/
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void begin(wdt_prescalar_e prescalar,short cycles);
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/**
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* Go to sleep
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*
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* This will return after the watchdog has awoken for the number
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* of times specified in begin().
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*/
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void go(void);
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/**
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* Test whether the node sleeps
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*
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* @retval true if the node will sleep
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*/
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operator bool(void) const
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{
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return sleep_cycles_per_transmission;
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}
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private:
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volatile short sleep_cycles_remaining;
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short sleep_cycles_per_transmission;
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};
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/**
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* Singleton instance for general use
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*
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* @warning: This class is hard-coded to ONLY work with this singleton.
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* Any other instances will fail.
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*/
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extern sleep_c Sleep;
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#endif // __SLEEP_H__
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// vim:ai:cin:sts=2 sw=2 ft=cpp
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