52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#pragma once
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#include <avr/sleep.h>
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#include <avr/power.h>
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#include <avr/wdt.h>
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// Utility macros
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#define adc_disable() (ADCSRA &= ~_BV(ADEN)) // disable ADC (before power-off)
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#define adc_enable() (ADCSRA |= _BV(ADEN)) // re-enable ADC
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#define enable_pin_interrupts() (GIMSK |= _BV(PCIE)) // Enable Pin Change Interrupts
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class TinyPower {
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public:
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static void setup() {
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set_sleep_mode(SLEEP_MODE_PWR_DOWN);
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enable_pin_interrupts();
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enableWdt();
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}
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static void sleep() {
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PCMSK |= _BV(PCINT0); // Use PB0 as interrupt pin
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adc_disable();
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sleep_enable(); // Sets the Sleep Enable bit in the MCUCR Register (SE BIT)
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sei(); // Enable interrupts
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sleep_cpu(); // sleep
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cli(); // Disable interrupts
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PCMSK &= ~_BV(PCINT0); // Turn off PB0 as interrupt pin
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sleep_disable(); // Clear SE bit
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adc_enable();
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sei(); // Enable interrupts
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}
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//enable the wdt for 8sec interrupt
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static void enableWdt()
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{
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MCUSR = 0x00;
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WDTCR |= _BV(WDCE) | _BV(WDE);
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WDTCR = _BV(WDIE) | _BV(WDP3) | _BV(WDP0); //8192ms
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}
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static void disableWdt() {
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MCUSR = 0x00;
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WDTCR |= _BV(WDCE) | _BV(WDE);
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WDTCR = 0x00;
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}
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};
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