Created
June 24, 2016 13:41
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#include <avr/sleep.h> | |
#include <avr/wdt.h> | |
#include <avr/interrupt.h> | |
#define RAIN_GAUGE_PIN 2 | |
const byte LED = 13; | |
volatile unsigned long last_rain_IRQ = 0; /* Debouncing */ | |
volatile unsigned int rain_clicks = 0; | |
ISR(INT0_vect) | |
{ | |
if (millis() - last_rain_IRQ > 10) { | |
last_rain_IRQ = millis(); | |
rain_clicks++; | |
Serial.println("haha"); | |
} | |
} | |
float get_rainfall() | |
{ | |
float rainfall = (rain_clicks * 0.1); | |
rain_clicks = 0; /* Reseta a quantidade de chuva após cada consulta */ | |
return rainfall; | |
} | |
void flash () | |
{ | |
pinMode (LED, OUTPUT); | |
for (byte i = 0; i < 10; i++) | |
{ | |
digitalWrite (LED, HIGH); | |
delay (500); | |
digitalWrite (LED, LOW); | |
delay (500); | |
} | |
pinMode (LED, INPUT); | |
} // end of flash | |
// watchdog interrupt | |
ISR (WDT_vect) | |
{ | |
wdt_disable(); // disable watchdog | |
} // end of WDT_vect | |
void setup () { | |
Serial.begin(9600); | |
pinMode(2, INPUT); | |
digitalWrite (2, HIGH); | |
EICRA = (0 << ISC00) | (0 << ISC01) | (0 << ISC10) | (0 << ISC11) ; //INT0 e INT1 no nível zero. | |
EIMSK = (0 << INT1) | (1 << INT0); //habilita INT0 | |
sei(); //habilita interrupções globais, ativando o bit I do SREG | |
/** Interrupção do pluviômetro */ | |
//pinMode(RAIN_GAUGE_PIN, INPUT); | |
//digitalWrite(RAIN_GAUGE_PIN, HIGH); | |
//attachInterrupt(0, rain_IRQ, FALLING); | |
} | |
void loop () | |
{ | |
flash (); | |
// disable ADC | |
ADCSRA = 0; | |
// clear various "reset" flags | |
MCUSR = 0; | |
// allow changes, disable reset | |
WDTCSR = bit (WDCE) | bit (WDE); | |
// set interrupt mode and an interval | |
WDTCSR = bit (WDIE) | bit (WDP3) | bit (WDP0); // set WDIE, and 8 seconds delay | |
wdt_reset(); // pat the dog | |
set_sleep_mode (SLEEP_MODE_PWR_DOWN); | |
noInterrupts (); // timed sequence follows | |
sleep_enable(); | |
// turn off brown-out enable in software | |
MCUCR = bit (BODS) | bit (BODSE); | |
MCUCR = bit (BODS); | |
interrupts (); // guarantees next instruction executed | |
sleep_cpu (); | |
// cancel sleep as a precaution | |
sleep_disable(); | |
Serial.println(get_rainfall()); | |
} // end of loop |
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