Userspace Arduino:BlinkUserspace

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This is the most basic example for the Userspace Arduino library involving blinking an LED from a sketch. For the Beaglebone Black, the current variant has a setup as shown in the diagram.

Connecting an LED to the Beaglebone Black


You need:

  • LED: any color and size. 10mm works fine
  • Resistor: > 470Ω to avoid exceeding the current limit of 4 mA per pin
  • Wire to join the stuff

Wire the LED with the positive (longer) end to P8_19 and the other end to GND.


Derived from Blink

  Turns on an LED on for one second, then off for one second, repeatedly.
  This example code is in the public domain.
// Pin 8_19 has an LED connected to it. It maps to 7 on the Beaglebone Black variant
// give it a name:
int led = 7;

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);     

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);               // wait for a second