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BoneScript

attachInterrupt(pin, handler, mode, [callback])

Detect changes on a digital input line

Note: This function is still undergoing development and debug.

Arguments

  • pin: the BeagleBone pin identifier
  • handler:
    • true: always call the callback upon interrupt event
    • string: evaluated upon interrupt, passed an object with 'value' having the state of the input pin and will call callback if evaluates to true
  • mode: RISING, FALLING or CHANGE
  • callback: called when handler returns true or other events

Return value

callback(x)

  • x.pin: pin that generated event
  • x.output: result of handler function
  • x.value: input state of the pin generating the interrupt
  • x.attached: handler successfully attached
  • x.configured: interrupt handler previously configured

Example

var b = require('bonescript');
var inputPin = 'P8_19';
b.pinMode(inputPin, b.INPUT);
b.attachInterrupt(inputPin, true, b.CHANGE, interruptCallback);
setTimeout(detach, 12000);

function interruptCallback(x) {
    console.log(JSON.stringify(x));
}

function detach() {
    b.detachInterrupt(inputPin);
    console.log('Interrupt detached');
}

Build and execute instructions

  • Toggle the state of P8_19 within 12 seconds of starting script.

See also

Topics

Related functions

Examples


Last updated by blog.hangerhead.com on Fri Jun 21 2013 14:36:23 GMT-0000 (UTC).
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