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attiny_light_controller.ino
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attiny_light_controller.ino
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#include <Arduino.h>
// array indices, not pinouts
int redPin = 0;
int greenPin = 1;
int bluePin = 2;
int buttonPin = 2; // pinout
// http://www.technoblogy.com/show?LE0
volatile uint8_t* port[] = {&OCR0A, &OCR0B, &OCR1B};
int pin[] = {0, 1, 4};
int delayInterval = 20;
int redBrightness = 0;
int greenBrightness= 0;
int blueBrightness = 0;
int maxBrightness = 50;
boolean maxBrightnessClimbing = true;
boolean brightnessChanged = false;
int off = 0;
const int MODE_PULSE = 0;
const int MODE_CYCLE = 1;
const int MODE_REDONLY = 2;
const int MODE_GREENONLY = 3;
const int MODE_BLUEONLY = 4;
int modes[5] = {MODE_PULSE, MODE_CYCLE, MODE_REDONLY, MODE_GREENONLY, MODE_BLUEONLY};
int modeIndex= 0;
boolean modeChanged = false;
boolean modeClimbing= true;
long modeCycleLastChangeMs = 0;
int modeCycleChangeAfterMs = 500;
int buttonLastState = LOW;
int buttonIsHeldAfterMs = 200;
long buttonHighMs = 0;
boolean buttonHeld, buttonPressed, buttonReleased = false;
void setup() {
pinMode(pin[redPin], OUTPUT);
pinMode(pin[greenPin], OUTPUT);
pinMode(pin[bluePin], OUTPUT);
pinMode(buttonPin, INPUT);
// http://www.technoblogy.com/show?LE0
// Configure counter/timer0 for fast PWM on PB0 and PB1
TCCR0A = 3<<COM0A0 | 3<<COM0B0 | 3<<WGM00;
TCCR0B = 0<<WGM02 | 3<<CS00; // Optional; already set
// Configure counter/timer1 for fast PWM on PB4
GTCCR = 1<<PWM1B | 3<<COM1B0;
TCCR1 = 3<<COM1A0 | 7<<CS10;
}
void setColor(int pin, int brightness) {
*port[pin] = 255 - brightness;
}
void handleButton(int button) {
int buttonCurrentState = digitalRead(button);
if (buttonCurrentState == HIGH) {
if (buttonLastState == HIGH) {
if (millis()-buttonHighMs > buttonIsHeldAfterMs) {
buttonHeld = true;
}
} else {
buttonPressed = true;
buttonHighMs = millis();
}
} else {
if (buttonLastState == HIGH) {
buttonReleased = true;
} else {
buttonReleased = false;
}
}
buttonLastState = buttonCurrentState;
}
void resetButtonData() {
if (digitalRead(buttonPin) == LOW) {
buttonHighMs = 0;
buttonHeld = false;
}
buttonPressed = false;
}
void resetLeds() {
setColor(redPin, off);
setColor(greenPin, off);
setColor(bluePin, off);
redBrightness, greenBrightness, blueBrightness = off;
}
void resetLeds(boolean soft) {
setColor(redPin, off);
setColor(greenPin, off);
setColor(bluePin, off);
if (!soft) {
redBrightness, greenBrightness, blueBrightness = off;
}
}
// START MODES
void MODE_pulse() {
if (modeChanged) {
resetLeds();
} else {
if (modeClimbing) {
if (redBrightness >= maxBrightness) {
modeClimbing = false;
redBrightness, greenBrightness, blueBrightness = maxBrightness;
} else {
redBrightness++;
greenBrightness++;
blueBrightness++;
}
} else {
if (redBrightness <= 1) {
modeClimbing = true;
redBrightness, greenBrightness, blueBrightness = maxBrightness;
} else {
redBrightness--;
greenBrightness--;
blueBrightness--;
}
}
setColor(redPin, redBrightness);
setColor(greenPin, greenBrightness);
setColor(bluePin, blueBrightness);
}
}
void MODE_cycle() {
if (modeChanged) {
resetLeds();
} else {
if (millis()-modeCycleLastChangeMs > modeCycleChangeAfterMs) {
redBrightness = random(1, maxBrightness);
greenBrightness = random(1, maxBrightness);
blueBrightness = random(1, maxBrightness);
setColor(redPin, redBrightness);
setColor(greenPin, greenBrightness);
setColor(bluePin, blueBrightness);
modeCycleLastChangeMs = millis();
}
}
}
void MODE_redOnly() {
if (modeChanged) {
resetLeds();
} else {
redBrightness = maxBrightness;
setColor(redPin, redBrightness);
setColor(greenPin, off);
setColor(bluePin, off);
}
}
void MODE_greenOnly() {
if (modeChanged) {
resetLeds();
} else {
greenBrightness = maxBrightness;
setColor(redPin, off);
setColor(greenPin, greenBrightness);
setColor(bluePin, off);
}
}
void MODE_blueOnly() {
if (modeChanged) {
resetLeds();
} else {
blueBrightness = maxBrightness;
setColor(redPin, off);
setColor(greenPin, off);
setColor(bluePin, blueBrightness);
}
}
// END MODES
void runMode() {
// CHANGE BRIGHTNESS
if (buttonHeld) {
brightnessChanged = true;
resetLeds(true);
if (maxBrightnessClimbing) {
if (maxBrightness+1 >= 255) {
maxBrightnessClimbing = false;
} else {
maxBrightness++;
}
} else {
if (maxBrightness-1 <= 0) {
maxBrightnessClimbing = true;
} else {
maxBrightness--;
}
}
setColor(redPin, maxBrightness);
} else {
brightnessChanged = false;
}
// UNKNOWN
if (buttonPressed && !buttonHeld) {
}
// CHANGE MODE
if (buttonReleased && !buttonHeld) {
modeIndex++;
modeChanged = true;
}
if (modeIndex >= (sizeof(modes) / sizeof(modes[0]))) {
modeIndex = 0;
}
if (!brightnessChanged) {
switch(modes[modeIndex]) {
case MODE_PULSE:
MODE_pulse();
break;
case MODE_CYCLE:
MODE_cycle();
break;
case MODE_REDONLY:
MODE_redOnly();
break;
case MODE_GREENONLY:
MODE_greenOnly();
break;
case MODE_BLUEONLY:
MODE_blueOnly();
break;
default:
setColor(redPin, 255);
break;
}
}
if (modeChanged) { modeChanged = false; }
}
void loop() {
handleButton(buttonPin);
runMode();
resetButtonData();
delay(delayInterval);
}