Task 33 - Arduino Key Words(2)

Each KEYWORD is a link to the
Arduino Reference page

pinMode()

Description

Configures the specified pin to behave either as an input or an output.
See the description of digital pins for details.

Syntax

pinMode(pin, mode)

Parameters

pin: the number of the pin whose mode you wish to set

mode: either INPUT or OUTPUT

int ledPin = 13;                 // LED connected to digital pin 13

void setup()
{
pinMode(ledPin, OUTPUT);      // sets the digital pin as output
}

void loop()
{
digitalWrite(ledPin, HIGH);   // sets the LED on
delay(1000);                  // waits for a second
digitalWrite(ledPin, LOW);    // sets the LED off
delay(1000);                  // waits for a second
}

digitalRead()

Description

Reads the value from a specified digital pin, either HIGH or LOW.

Syntax

digitalRead(pin)

Parameters

pin: the number of the digital pin you want to read (int)

Returns

HIGH or LOW

int ledPin = 13; // LED connected to digital pin 13
int inPin = 7;   // pushbutton connected to digital pin 7
int val = 0;     // variable to store the read value

void setup()
{
pinMode(ledPin, OUTPUT);      // sets the digital pin 13 as output
pinMode(inPin, INPUT);      // sets the digital pin 7 as input
}

void loop()
{
val = digitalRead(inPin);   // read the input pin
digitalWrite(ledPin, val);    // sets the LED to the button's value
}