A-Teachers-Guide-to-the-Intel-Galileo-Final

A TEACHER’S GUIDE TO THE INTEL® GALILEO | 32// initialise the switch digital pin as an inputpinMode(switchPin, INPUT);In the loop, the main logic occurs.First, the red and green result LEDs are set to LOW:digitalWrite(redLED,LOW);digitalWrite(greenLED,LOW);Then six LEDs are sequenced to flash on (HIGH) and off(LOW). For example, the following threelines set the LED connected to pin 12 to flash on and off:digitalWrite(ledPin12,HIGH);delay(delayBetweenLEDs);digitalWrite(ledPin12,LOW);Before writing Pin 7 HIGH, the state of the push button is read:switchPinStateBeforeLightingLed7 = digitalRead(switchPin);The next part of the code then checks for the button to be pressed while the green LED is lit. Ituses a for loop to check 10000 times for the button being pressed. The following line starts thefor loop and the code inside the starting and ending brace { is performed 10000 times.for (int i=0; i < 10000; i++) {If it finds the button is pressed it sets the green result LED to HIGH and sets the red result LEDto LOW and calls the break command to jump out of the for loop. If the button is not pressed itsets the red result LED to HIGH.for (int i=0; i < 10000; i++) {if (!switchPinStateBeforeLightingLed7) { // not allowed to hold down button!switchPinState = digitalRead(switchPin);if (switchPinState == HIGH) {digitalWrite(greenLED,HIGH);digitalWrite(redLED,LOW);break;}else {digitalWrite(redLED, HIGH);digitalWrite(greenLED, LOW);}}else {digitalWrite(redLED, HIGH);}}Finally, a delay is called to let the person see how they went and then the Green LED is set toLOW:delay(250); // wait to let person see how they wentdigitalWrite(ledPin7,LOW);