Learn the basics of programming an Arduino with some simple input and output practice! Make an LED blink, and integrate some buttons!
_01-HelloBlink
// This is the Arduino version of "Hello World"
// We're using a digital pin to power a 5V LED
// Connect the "Long leg" of the LED to the digital pin and the short leg to GND
void setup()
{
pinMode(7, OUTPUT);
// The first step is to tell the Arduino where we're going to connect the LED
// "7" tells the pinMode function that we're connecting the positive led to digital pin 7
// "OUTPUT" tells the pinMode function that we're using the pin for output, not input
}
// Remember that the Arduino will loop the code inside of "loop()" continously
void loop() {
digitalWrite(7, HIGH);
// Power-on Digital pin 7
delay(1000);
// Wait 1000 ms
digitalWrite(7, LOW);
// Power-off Digital pin 7
delay(1000);
// Wait 1000ms
}
** Let's add some constants!
_02-AdvancedBlink
// This is the Arduino version of "Hello World"
// We're using a digital pin to power a 5V LED
// Connect the "Long leg" of the LED to the digital pin and the short leg to GND
// Let's up our game a little
// We're going to use the "define" function to set our digital pin as a constant at program start
// This will make it easier to redefine what pin we'll use for our LED
// We're also going to use a constant to set our delay period
#define dpin 7
#define wait 500
void setup()
{
pinMode(dpin, OUTPUT);
// The first step is to tell the Arduino where we're going to connect the LED
// "7" tells the pinMode function that we're connecting the positive led to digital pin 7
// "OUTPUT" tells the pinMode function that we're using the pin for output, not input
}
// Remember that the Arduino will loop the code inside of "loop()" continously
void loop() {
digitalWrite(dpin, HIGH);
// Power-on Digital pin 7
delay(wait);
// Wait 1000 ms
digitalWrite(dpin, LOW);
// Power-off Digital pin 7
delay(wait);
// Wait 1000ms
}
** And now some functions!
_03-BetterBlink
// This is the Arduino version of "Hello World"
// We're using a digital pin to power a 5V LED
// Connect the "Long leg" of the LED to the digital pin and the short leg to GND
// Know what? As long as we're getting crazy with super-simple programs, what about this?
// Let's create a a function that gets called in "loop()"
// We Removed the ""wait"" constant
#define dpin 7
void setup()
{
pinMode(dpin, OUTPUT);
// The first step is to tell the Arduino where we're going to connect the LED
// "7" tells the pinMode function that we're connecting the positive led to digital pin 7
// "OUTPUT" tells the pinMode function that we're using the pin for output, not input
}
// Remember that the Arduino will loop the code inside of "loop()" continously
void blink(int on, int off)
{
digitalWrite(dpin, HIGH);
delay(on);
digitalWrite(dpin, LOW);
delay(off);
}
void loop()
{
// We call the function, and pass it the wait parameters
// The first parameter tells the function how long to keep the LED light on
// The second parameter tell the function how long to keep the LED light off
blink(2000, 500);
}
Now that we know how to push output, let's practice input!
_04_Button
// Using constants to define to which pin each button is connected
#define buttonPin1 2
// This is the variable that stores the state of the button
void
{
These show notes have been truncated due to length. For the full show notes, visit https://twit.tv/shows/know-how/episodes/256
Hosts: Fr. Robert Ballecer, SJ and Bryan Burnett
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