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gpio-property.js
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// -*- mode: js; js-indent-level:2; -*-
// SPDX-License-Identifier: MPL-2.0
/**
*
* Copyright 2018-present Samsung Electronics France SAS, and other contributors
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.*
*/
var console = require('console'); // Disable logs here by editing to '!console.log'
var log = console.log || function () {};
var verbose = !console.log || function () {};
var webthing;
try {
webthing = require('../../../webthing');
} catch (err) {
webthing = require('webthing-iotjs');
}
var Property = webthing.Property;
var Value = webthing.Value;
var gpio = require('gpio');
function GpioOutProperty(thing, name, value, metadata, config) {
var _this = this;
var self = this;
Property.call(this, thing, name, new Value(Boolean(value)), {
'@type': 'OnOffProperty',
title: metadata && metadata.title || "On/Off: ".concat(name),
type: 'boolean',
description: metadata && metadata.description || "GPIO Actuator on pin=".concat(config.pin)
});
{
this.config = config;
this.port = gpio.open({
pin: config.pin,
direction: gpio.DIRECTION.OUT
}, function (err, port) {
log("log: GPIO: ".concat(self.getName(), ": open: ").concat(err));
if (err) {
console.error("error: GPIO: ".concat(self.getName(), ": Fail to open: ").concat(err));
return err;
}
self.port = port;
self.value.valueForwarder = function (value) {
self.port.write(value, function (err) {
if (err) {
log("error: GPIO: ".concat(self.getName(), ": Fail to write: ").concat(err));
return err;
}
});
};
});
}
this.close = function () {
try {
self.port && self.port.closeSync();
} catch (err) {
console.error("error: GPIO: ".concat(_this.getName(), ": Fail to close: ").concat(err));
return err;
}
log("log: GPIO: ".concat(_this.getName(), ": close:"));
};
return this;
}
function GpioInProperty(thing, name, value, metadata, config) {
var _this2 = this;
var self = this;
Property.call(this, thing, name, new Value(value), {
'@type': 'BooleanProperty',
label: metadata && metadata.label || "On/Off: ".concat(name),
type: 'boolean',
readOnly: true,
description: metadata && metadata.description || "GPIO Sensor on pin=".concat(config.pin)
});
{
this.config = config;
self.period = 1000;
self.port = gpio.open({
pin: config.pin,
direction: gpio.DIRECTION.IN
}, function (err) {
log("log: GPIO: ".concat(self.getName(), ": open: ").concat(err, " (null expected)"));
if (err) {
console.error("error: GPIO: ".concat(self.getName(), ": Failed to open: ").concat(err));
return null;
}
self.inverval = setInterval(function () {
var value = Boolean(self.port.readSync());
verbose("log: verbose: GPIO: ".concat(self.getName(), ": update: ").concat(value));
if (value !== self.lastValue) {
log("log: GPIO: ".concat(self.getName(), ": change: ").concat(value));
self.value.notifyOfExternalUpdate(value);
self.lastValue = value;
}
}, self.period);
});
}
self.close = function () {
try {
self.inverval && clearInterval(self.inverval);
self.port && self.port.closeSync();
} catch (err) {
console.error("error: GPIO: ".concat(_this2.getName(), " close:").concat(err));
return err;
}
log("log: GPIO: ".concat(_this2.getName(), ": close:"));
};
return this;
}
function GpioProperty(thing, name, value, metadata, config) {
if (config.direction === 'out') {
return new GpioOutProperty(thing, name, value, metadata, config);
} else if (config.direction === 'in') {
return new GpioInProperty(thing, name, value, metadata, config);
}
throw 'error: Invalid param';
}
module.exports = GpioProperty;