Arduino-Development / examples /10.StarterKit_BasicKit /p02_SpaceshipInterface /p02_SpaceshipInterface.ino
| /* | |
| Arduino Starter Kit example | |
| Project 2 - Spaceship Interface | |
| This sketch is written to accompany Project 2 in the Arduino Starter Kit | |
| Parts required: | |
| - one green LED | |
| - two red LEDs | |
| - pushbutton | |
| - 10 kilohm resistor | |
| - three 220 ohm resistors | |
| created 13 Sep 2012 | |
| by Scott Fitzgerald | |
| https://store.arduino.cc/genuino-starter-kit | |
| This example code is part of the public domain. | |
| */ | |
| // Create a global variable to hold the state of the switch. This variable is | |
| // persistent throughout the program. Whenever you refer to switchState, you’re | |
| // talking about the number it holds | |
| int switchstate = 0; | |
| void setup() { | |
| // declare the LED pins as outputs | |
| pinMode(3, OUTPUT); | |
| pinMode(4, OUTPUT); | |
| pinMode(5, OUTPUT); | |
| // declare the switch pin as an input | |
| pinMode(2, INPUT); | |
| } | |
| void loop() { | |
| // read the value of the switch | |
| // digitalRead() checks to see if there is voltage on the pin or not | |
| switchstate = digitalRead(2); | |
| // if the button is not pressed turn on the green LED and off the red LEDs | |
| if (switchstate == LOW) { | |
| digitalWrite(3, HIGH); // turn the green LED on pin 3 on | |
| digitalWrite(4, LOW); // turn the red LED on pin 4 off | |
| digitalWrite(5, LOW); // turn the red LED on pin 5 off | |
| } | |
| // this else is part of the above if() statement. | |
| // if the switch is not LOW (the button is pressed) turn off the green LED and | |
| // blink alternatively the red LEDs | |
| else { | |
| digitalWrite(3, LOW); // turn the green LED on pin 3 off | |
| digitalWrite(4, LOW); // turn the red LED on pin 4 off | |
| digitalWrite(5, HIGH); // turn the red LED on pin 5 on | |
| // wait for a quarter second before changing the light | |
| delay(250); | |
| digitalWrite(4, HIGH); // turn the red LED on pin 4 on | |
| digitalWrite(5, LOW); // turn the red LED on pin 5 off | |
| // wait for a quarter second before changing the light | |
| delay(250); | |
| } | |
| } | |