113 lines
4.0 KiB
JavaScript
113 lines
4.0 KiB
JavaScript
/**
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* Copyright 2013 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var RED = require(process.env.NODE_RED_HOME+"/red/red");
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var settings = RED.settings;
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var util = require("util");
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var fs = require('fs');
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var plat = require('os').platform();
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var pre = "\\\\.\\";
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if (! plat.match(/^win/)) {
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util.log("[26-rawserial.js] Advise: Only really needed for Windows boxes without serialport npm module installed.");
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pre = "";
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}
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function RawSerialInNode(n) {
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RED.nodes.createNode(this,n);
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this.port = n.port;
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this.split = n.split||null;
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if (this.split == '\\n') this.split = "\n";
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if (this.split == '\\r') this.split = "\r";
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var node = this;
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var setupSerial = function() {
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node.inp = fs.createReadStream(pre+node.port);
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node.inp.setEncoding('utf8');
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var line = "";
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node.inp.on('data', function (data) {
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if (node.split != null) {
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if (data == node.split) {
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node.send({payload:line});
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line = "";
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}
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else { line += data; }
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}
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else { node.send({payload:data}); }
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});
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//node.inp.on('end', function (error) {console.log("End", error);});
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node.inp.on('close', function (error) {
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util.log("[rawserial] "+node.port+" closed");
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node.tout = setTimeout(function() {
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setupSerial();
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},settings.serialReconnectTime);
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});
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node.inp.on('error', function(error) {
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if (error.code == "ENOENT") { util.log("[rawserial] port "+node.port+" not found"); }
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else { util.log("[rawserial] "+node.port+" error "+error); }
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node.tout = setTimeout(function() {
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setupSerial();
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},settings.serialReconnectTime);
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});
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}
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setupSerial();
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node.on('close', function() {
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if (node.tout) { clearTimeout(node.tout); }
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if (node.inp) { node.inp.pause(); }
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});
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}
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RED.nodes.registerType("rawserial in",RawSerialInNode);
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function RawSerialOutNode(n) {
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RED.nodes.createNode(this,n);
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this.port = n.port;
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var node = this;
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var setupSerial = function() {
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node.oup = fs.createWriteStream(pre+node.port,{ flags:'w', encoding:'utf8', mode:0666 });
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node.on("input", function(msg) {
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if (msg.payload != null) {
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node.oup.write(msg.payload);
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}
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});
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node.oup.on('open', function (error) { util.log("[rawserial] opened "+node.port); });
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node.oup.on('end', function (error) { console.log("End",error); });
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node.oup.on('close', function (error) {
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util.log("[rawserial] "+node.port+" closed");
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node.tout = setTimeout(function() {
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setupSerial();
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},settings.serialReconnectTime);
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});
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node.oup.on('error', function(error) {
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if (error.code == "EACCES") { util.log("[rawserial] can't access port "+node.port); }
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else if (error.code == "EIO") { util.log("[rawserial] can't write to port "+node.port); }
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else { util.log("[rawserial] "+node.port+" error "+error); }
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node.tout = setTimeout(function() {
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setupSerial();
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},settings.serialReconnectTime);
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});
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}
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setupSerial();
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node.on('close', function() {
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if (node.tout) { clearTimeout(node.tout); }
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});
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}
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RED.nodes.registerType("rawserial out",RawSerialOutNode);
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