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#include <Bounce2.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif
#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif
#define PINLASER 3 // Output goes to NPN base that controls the laser module
#define PINLIGHT 4 // Output goes to NPN base that controls the LED
#define PINB0 0 // also PCINT0 or INT0
#define PINB1 1 // also PCINT1
#define PINB2 2 // also PCINT2
Bounce btnLaser = Bounce();
Bounce btnLight = Bounce();
Bounce btnFlash = Bounce();
bool effLight = false, effLaser = false; // Stores state of LED and Laser
uint8_t effStrobo = 0; // Strobe interval
unsigned long stroboMillis, sleepMillis; // Stores start time for strobe effect and sleep counter
bool sleepBool = false; // This indicates if the sleep counter has started
uint8_t geninterval() { // Returns next strobe interval (random number between 50 and 190ms in 10th steps)
return 50 + (10 * random(15));
}
void setup() {
cbi(ADCSRA,ADEN); // Disable DAC
pinMode(PINLASER, OUTPUT);
pinMode(PINLIGHT, OUTPUT);
btnFlash.attach(PINB0, INPUT_PULLUP);
btnLaser.attach(PINB1, INPUT_PULLUP);
btnLight.attach(PINB2, INPUT_PULLUP);
btnFlash.interval(5);
btnLaser.interval(5);
btnLight.interval(5);
digitalWrite(PINLASER, LOW);
digitalWrite(PINLIGHT, LOW);
}
void loop() {
btnLaser.update();
btnLight.update();
btnFlash.update();
if(btnLaser.fell()) {
digitalWrite(PINLASER, !digitalRead(PINLASER));
effLaser = !effLaser;
sleepBool = false;
}
if(btnLight.fell()) {
digitalWrite(PINLIGHT, !digitalRead(PINLIGHT));
effLight = !effLight;
sleepBool = false;
}
if(!btnFlash.read()) {
if(effLight) {
digitalWrite(PINLIGHT, LOW);
} else {
sleepBool = false;
if(millis() - stroboMillis > effStrobo) {
digitalWrite(PINLIGHT, !digitalRead(PINLIGHT));
effStrobo = geninterval();
stroboMillis = millis();
}
}
}
if(btnFlash.rose()) {
if(effLight) {
digitalWrite(PINLIGHT, HIGH);
} else {
digitalWrite(PINLIGHT, LOW);
effStrobo = 0;
stroboMillis = 0;
}
}
if(sleepBool) {
if(millis() - sleepMillis > 200) {
sleepBool = false; // We decided to go to sleep, no need for the counter
cli(); // Disable interrupt handling so we can configure everything uninterrupted
GIMSK = 0b00100000; // activate On Pin Change Interrupt PCINT
PCMSK = 0b00000111; // activate PCINT for Pin PB0, PB1 and PB2 (PCINT0, PCINT1 and PCINT2)
set_sleep_mode(SLEEP_MODE_PWR_DOWN); // We power down completely
sleep_enable(); // Prepare Sleep mode
sleep_bod_disable(); // Disable Brown-out Detector (sleep will be a little bit deeper now)
sei(); // Enable interrupt handling, otherwise we won't wake up anymore
sleep_cpu(); // And we're gone
cli(); // If we arrive at this step, something woke us up, disable interrupt handling so we can clean up uninterrupted
sleep_disable(); // Disable Sleep mode
GIMSK = 0; // Since we don't use interrupt handling except for Sleep wakeup, disable PCINT
PCMSK = 0; // We disabled PCINT so we don't need to know what kind of PCINT we should listen to
sei(); // Cleanup done, enable interrupt handling again.
}
} else {
if((!effLight) && (!effLaser)) {
sleepBool = true;
sleepMillis = millis();
}
}
}
ISR(PCINT0_vect) {} // Interrupt Handling routine. Since we just need PCINT to wake up, this can be empty