digitalWrite()

Posted by On 11 / 07 / 2013 3 Comments

Description

Write a HIGH or a LOW value to a digital pin.

If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 3.3V for HIGH, 0V (ground) for LOW.

Syntax
digitalWrite(pin, value)

Parameters

pin: the pin number
value: HIGH or LOW

Returns

none

Example

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

 

void setup()

{

  pinMode(ledPin, OUTPUT);      // Set a digital pin as output

}

 

void loop()

{

  digitalWrite(ledPin, HIGH);   // Light up the LED

  delay(1000);                  // Wait 1 second

  digitalWrite(ledPin, LOW);    // Turn off LED

  delay(1000);                  // Wait 1 second

}

Sets pin 13 to HIGH, makes a one-second-long delay, and sets the pin back to LOW.

Note

Unlike Arduino, the analog input pins (referred to as A0, A1, etc) of 86Duino cannot be used as digital pins.

See also

－ pinMode()
－ digitalRead()

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The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.