// ATtiny code
// Reads analog (or digital) input from pin 4 and every time the input goes below a set threshold
// it counts one and displays the increase in count either by activating up one of four LEDs (or transistors)
// or one of twelve charlieplexed LEDs.
// SET THESE VALUES:
int threshold = 500;
int maxCount = 7;
////////////////////
boolean sensorTriggered = false;
int count = 0;
int sensorValue = 0;
long lastDebounceTime = 0;  // the last time the output pin was toggled
long debounceDelay = 50;    // the debounce time; increase if the output flickers
////////////////////////////////////////////////////////////////////////////////
void setup() {
for (int pin=0; pin<4; pin++) {
pinMode(pin, OUTPUT);
digitalWrite(pin, LOW);
}
pinMode(4, INPUT);
digitalWrite(4, HIGH);  // internal pull-up
}
////////////////////////////////////////////////////////////////////////////////
void loop() {
testDigits();
}
void testDigits() {
charlieLoop();
}
////////////////////////////////////////////////////////////////////////////////
void readSensor() {
sensorValue = analogRead(2);  // pin4!
delay(100);
if (sensorValue < threshold && sensorTriggered == false) {
sensorTriggered = true;
count++;
if (count > maxCount) count = 0;
charlieLoop();
}
if (sensorValue > threshold) sensorTriggered = false;
}
////////////////////////////////////////////////////////////////////////////////
void charlieLoop() {
count++;
for (int i=0; i<1000; i++) {
for (int c=0; c<count; c++) {
charliePlexPin(c);
}
}
delay(1000);
if (count > maxCount) count = 0;
}
////////////////////////////////////////////////////////////////////////////////
void charliePlexPin(int myLed){
// Make sure we don't feed random voltages to the LEDs
// during the brief time we are changing pin modes and voltages.
pinMode(0, INPUT);
pinMode(1, INPUT);
pinMode(2, INPUT);
pinMode(3, INPUT);
switch(myLed){
case 0:
pinMode(0, OUTPUT);
pinMode(2, OUTPUT);
digitalWrite(2, LOW);
digitalWrite(0, HIGH);
break;
case 1:
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
break;
case 2:
pinMode(3, OUTPUT);
pinMode(1, OUTPUT);
digitalWrite(1, LOW);
digitalWrite(3, HIGH);
break;
case 3:
pinMode(1, OUTPUT);
pinMode(0, OUTPUT);
digitalWrite(0, LOW);
digitalWrite(1, HIGH);
break;
case 4:
pinMode(0, OUTPUT);
pinMode(1, OUTPUT);
digitalWrite(1, LOW);
digitalWrite(0, HIGH);
break;
case 5:
pinMode(2, OUTPUT);
pinMode(0, OUTPUT);
digitalWrite(0, LOW);
digitalWrite(2, HIGH);
break;
case 6:
pinMode(2, OUTPUT);
pinMode(1, OUTPUT);
digitalWrite(1, LOW);
digitalWrite(2, HIGH);
break;
}
}
////////////////////////////////////////////////////////////////////////////////
void spwm(int freq, int pin, int sp) {
// call charlieplexing to set correct pin outs:
//on:
digitalWrite(pin, HIGH);
delayMicroseconds(sp * freq);
// off:
digitalWrite(pin, LOW);
delayMicroseconds(sp * (255 - freq));
}