// Copyright (c) 2017 The Regents of the University of California.
// All rights reserved.
//
// Permission is hereby granted, without written agreement and without
// license or royalty fees, to use, copy, modify, and distribute this
// software and its documentation for any purpose, provided that the above
// copyright notice and the following two paragraphs appear in all copies
// of this software.
//
// IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
// ENHANCEMENTS, OR MODIFICATIONS.
//
/** A dummy accessor for a vibration sensor that outputs a range of vibrations
* varying from a low of 0 m/s^2 to 100 m/s^2 in steps that default to 5 m/s^2
* every second. The control input can be used to vary the step size.
* The output is a JSON object with the following properties:
* * name: "Vibration sensor"
* * units: "m/s^2"
* * vibration: a number.
*
* @accessor VibrationSensor
* @author Edward A. Lee (eal@eecs.berkeley.edu)
* @input control A JSON object that is expected to have one property, "step", a number.
* @output data A JSON object.
* @version $$Id$$
*/
// Stop extra messages from jslint. Note that there should be no
// space between the / and the * and global.
/*globals console, error, exports, require */
/*jshint globalstrict: true*/
"use strict";
exports.setup = function() {
this.implement('ControllableSensor');
};
var handle = null;
exports.initialize = function() {
var thiz = this;
var vibration = 0;
// Get or set to a default a step size.
var step = thiz.get('control')['step'];
if (step !== 0 && !step) {
step = 10;
}
// At initialize, send the schema;
this.send('schema', schema);
handle = setInterval(function() {
thiz.send('data', {
'name': "Vibration sensor",
'units': "m/s^2",
'vibration': vibration,
});
vibration += step;
}, 1000);
this.addInputHandler('control', function() {
var control = thiz.get('control');
var s = control['step'];
if (s || s === 0) {
if (typeof s === 'string') {
s = JSON.parse(s);
}
step = s;
}
});
};
exports.wrapup = function() {
if (handle) {
clearInterval(handle);
}
};
var schema = {
"$schema": "http://json-schema.org/draft-03/schema#",
"type": "object",
"properties": {
"step": {
"type": "number",
"title": "step size",
"description": "The increment by which data is increased each second"
},
"options": {
"type": "string",
"title": "options",
"options": ["A", "B", "C"]
}
}
};