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

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43 | Beginning with Arduino}}else {analogWrite(ledPin, 0);Serial.println('Writing 0 as it is > 40'); // daytime so LED is off}delay(1000);Download and run program.Explanation of the CodeThe first four lines of the program initialise some variables to represent the LED pin, the analogpin, the sensor value read from the potentiometer and the output value that will be written tothe LED:int ledPin = 11; // LED connected to digital pin 11const int analogInPin = 0; // Analog input pin that the potentiometer is attached toint sensorValue = 0; // value read from the potint outputValue = 0;In the setup code, the LED pin is set to be of OUTPUT type and the serial console is initialised.You must have 9600 for the baud rate.pinMode(ledPin, OUTPUT); //Serial.begin(9600);In the loop code, the value is read from the analog pin and stored in the sensorValue variablefollowed by some debug statements to the serial console printing what the value is:sensorValue = analogRead(analogInPin);Serial.print("sensor value in is ");Serial.println(sensorValue);Using the built in map function, the value from the analog pin is mapped from the range of [0,1023] to the LED range of [0, 255] with the following command:outputValue = map(sensorValue, 0, 1023, 0, 255);The outputValue returned from the previous command is then checked to see if it is less than acertain threshold. In the case of darkness, the photocell will provide a large resistance and lowerthe voltage returned by the Analog pin, AO. When the outputValue is lower than the threshold,the LED will be turned on by writing the outputValue to the LED pin. Otherwise, a 0 value iswritten to the LED. Finally a delay is programmed to make sure the light stays on momentarily:if (outputValue < 102) {analogWrite(ledPin, outputValue);}else {analogWrite(ledPin, 0);Serial.println('Writing 0 as it is > 40'); // daytime so LED is off}delay(1000);
A TEACHER’S GUIDE TO THE INTEL® GALILEO | 44Using the Galileo as a ComputerCommunicating with the GalileoConnecting via SerialYou can communicate serially with your Intel® Galileo Gen 2 via the 6-pin FTDI serial connectorand the USB port on your computer.This is also known as a USB to TTL Serial Cable (3.3V). The connector slips right on, and the Intel®Galileo Gen 2 board has the identifiers GRN and BLK silkscreened onto the surface, to help youalign the cable with the wire colors on the FTDI connector hood. The 6-pin header operates at 3.3V TTL levels.You can run Linux commands serially using this cable and some serial communication softwaresuch as the free CoolTerm (http://freeware.the-meiers.org).1. Connect your Serial Cable to your computer via the USB port.2. Confirm the new port that’s appeared. In Windows, you can check this by bringing upyour Device Manager. On a MAC, you can check your System Profiler.
Page 8: 3 | IntroductionHow to use this gui
Page 14 and 15: 9 | Pedagogical ApproachesAs a proc
Page 16 and 17: 11 | Setting Up Your Intel® Galile
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