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PowerSave.cpp
1 /*
2  * Copyright (C) 2012 Southern Storm Software, Pty Ltd.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included
12  * in all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20  * DEALINGS IN THE SOFTWARE.
21  */
22 
23 #include "PowerSave.h"
24 #include <avr/wdt.h>
25 #include <avr/sleep.h>
26 #include <avr/power.h>
27 #include <avr/interrupt.h>
28 
36 /*\@{*/
37 
48 ISR(WDT_vect)
49 {
50  wdt_disable();
51 }
132 void sleepFor(SleepDuration duration, uint8_t mode)
133 {
134  // Turn off the analog to digital converter.
135  ADCSRA &= ~(1 << ADEN);
136  power_adc_disable();
137 
138  // Turn on the watchdog timer for the desired duration.
139  wdt_enable(duration);
140  WDTCSR |= (1 << WDIE);
141 
142  // Put the device to sleep, including turning off the Brown Out Detector.
143  set_sleep_mode(mode);
144  cli();
145  sleep_enable();
146 #if defined(sleep_bod_disable)
147  sleep_bod_disable();
148 #endif
149  sei();
150  sleep_cpu();
151  sleep_disable();
152  sei();
153 
154  // Turn the analog to digital converter back on.
155  power_adc_enable();
156  ADCSRA |= (1 << ADEN);
157 }
158 
159 /*\@}*/
void sleepFor(SleepDuration duration, uint8_t mode)
Puts the CPU to sleep for a specific duration.The analog to digital converter and the brown out detec...
Definition: PowerSave.cpp:132
SleepDuration
Duration to put the CPU to sleep with sleepFor().
Definition: PowerSave.h:38