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/*********************
* connect the COIN wire to digital 2
* set the side switches to "FAST" "NC"
**********************/
// include the library code:
#include <Wire.h>
#include <Adafruit_MCP23017.h>
#include <Adafruit_RGBLCDShield.h>
// The shield uses the I2C SCL and SDA pins. On classic Arduinos
// this is Analog 4 and 5 so you can't use those for analogRead() anymore
// However, you can connect other I2C sensors to the I2C bus and share
// the I2C bus.
Adafruit_RGBLCDShield lcd = Adafruit_RGBLCDShield();
// These #defines make it easy to set the backlight color
#define RED 0x1
#define YELLOW 0x3
#define GREEN 0x2
#define TEAL 0x6
#define BLUE 0x4
#define VIOLET 0x5
#define WHITE 0x7
// attach coin wire to digital 2
#define COIN 2
int coins;
int brightness = 0; // how bright the LED is
int fadeAmount = 5; // how many points to fade the LED by
int fadebrightness = 0; // how bright the LED is when it's flashing
void setup() {
// declare pin 11 to be an output for LED:
pinMode(11, OUTPUT);
// Debugging output
Serial.begin(9600);
// set up the LCD's number of rows and columns:
lcd.begin(16, 2);
pinMode(COIN, INPUT);
digitalWrite(COIN, HIGH); // pull up
coins = 0;
}
void loop() {
lcd.setCursor(0,0);
lcd.print(" PLEASE INSERT ");
lcd.setCursor(0,1);
lcd.print(" ONE QUARTER ");
// set the brightness of pin 11:
analogWrite(11, brightness);
// while the coin pin is low (no coin detected), do nothing
while (! digitalRead(COIN)) {
delay(1);
}
// while the pin is high, we'll track the length with a counter
uint8_t counter = 0;
while (digitalRead(COIN)) {
delay(1);
counter++;
}
Serial.print(counter);
Serial.println(" ms long pulse");
if ((counter > 60) || (counter < 20))
return;
coins++;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" OINK OINK! ");
lcd.setCursor(0,1);
lcd.print("YOU HAVE $");
lcd.print(coins*.25);
lcd.print(" ");
// loop through to flash the LED
fadebrightness = brightness;
for (int i = brightness; i < 510; i+=5) {
// turn the pin on:
analogWrite(11, fadebrightness);
fadebrightness = fadebrightness + fadeAmount;
delay(20);
// reverse the direction of the fading at the ends of the fade:
if (fadebrightness == 0 || fadebrightness == 255) {
fadeAmount = -fadeAmount;
}
}
brightness = brightness + 5;
}
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