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      1 /*jslint node:true, vars:true, bitwise:true, unparam:true */
      2 /*jshint unused:true */
      3 /*global */
      4 /*
      5 * Author: Zion Orent <zorent (at) ics.com>
      6 * Copyright (c) 2014 Intel Corporation.
      7 *
      8 * Permission is hereby granted, free of charge, to any person obtaining
      9 * a copy of this software and associated documentation files (the
     10 * "Software"), to deal in the Software without restriction, including
     11 * without limitation the rights to use, copy, modify, merge, publish,
     12 * distribute, sublicense, and/or sell copies of the Software, and to
     13 * permit persons to whom the Software is furnished to do so, subject to
     14 * the following conditions:
     15 *
     16 * The above copyright notice and this permission notice shall be
     17 * included in all copies or substantial portions of the Software.
     18 *
     19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     26 */
     27 
     28 var GPSSensor = require('jsupm_ublox6');
     29 
     30 // Instantiate a Ublox6 GPS device on uart 0.
     31 var myGPSSensor = new GPSSensor.Ublox6(0);
     32 
     33 if (!myGPSSensor.setupTty(GPSSensor.int_B9600))
     34 {
     35 	console.log("Failed to setup tty port parameters");
     36 	process.exit(0);
     37 }
     38 
     39 // Collect and output NMEA data.
     40 
     41 // This device also supports numerous configuration options, which
     42 // you can set with writeData().  Please refer to the Ublox-6 data
     43 // sheet for further information on the formats of the data sent and
     44 // received, and the various operating modes available.
     45 
     46 var bufferLength = 256;
     47 var nmeaBuffer  = new GPSSensor.charArray(bufferLength);
     48 
     49 function getGPSInfo()
     50 {
     51 	// we don't want the read to block in this example, so always
     52 	// check to see if data is available first.
     53 	if (myGPSSensor.dataAvailable())
     54 	{
     55 		var rv = myGPSSensor.readData(nmeaBuffer, bufferLength);
     56 
     57 		var GPSData, dataCharCode, isNewLine, lastNewLine;
     58 		var numlines= 0;
     59 		if (rv > 0)
     60 		{
     61 			GPSData = "";
     62 			// read only the number of characters
     63 			// specified by myGPSSensor.readData
     64 			for (var x = 0; x < rv; x++)
     65 				GPSData += nmeaBuffer.getitem(x);
     66 			process.stdout.write(GPSData)
     67 		}
     68 
     69 		if (rv < 0) // some sort of read error occured
     70 		{
     71 			console.log("Port read error.");
     72 			process.exit(0);
     73 		}
     74 	}
     75 }
     76 
     77 setInterval(getGPSInfo, 100);
     78 
     79 // Print message when exiting
     80 process.on('SIGINT', function()
     81 {
     82 	console.log("Exiting...");
     83 	process.exit(0);
     84 });
     85