upm/examples/javascript/wt5001.js

/*jslint node:true, vars:true, bitwise:true, unparam:true */
/*jshint unused:true */
/*global */
/*
* Author: Zion Orent <zorent@ics.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

var MP3Player = require('jsupm_wt5001');

function printUsage(progname)
{
	console.log("Usage:" + progname + " <command>");
	console.log("Commands:");
	console.log("0  - stop playing");
	console.log("1  - start playing track 1");
	console.log("2  - pause/un-pause playback");
	console.log("3  - next track");
	console.log("4  - previous track");
}

// Instantiate a WT5001 serial MP3 player on uart 0.
// This example was tested on the Grove Serial MP3 module.

var myMP3Player = new MP3Player.WT5001(0);

var cmd = -1;
if (process.argv.length > 2)
	cmd = parseInt(process.argv[2]);

if (!myMP3Player.setupTty(MP3Player.int_B9600))
{
	console.log("Failed to setup tty port parameters");
	process.exit(0);
}

switch (cmd)
{
	case 0:
		myMP3Player.stop();
		break;

	case 1:
		myMP3Player.play(MP3Player.WT5001.SD, 1);
		break;

	case 2:
		myMP3Player.pause();
		break;

	case 3:
		myMP3Player.next();
		break;

	case 4:
		myMP3Player.previous();
		break;

	default:
		// nothing, just output usage, and info below
		printUsage(process.argv[1]);
		break;
}

// print out some information
var vol = new MP3Player.uint8Array(0);
myMP3Player.getVolume(vol);
console.log("The current volume is: " + vol.getitem(0));

var ps = new MP3Player.uint8Array(0);
myMP3Player.getPlayState(ps);
console.log("The current play state is: " + ps.getitem(0));

var numf = new MP3Player.uint16Array(0);
myMP3Player.getNumFiles(MP3Player.WT5001.SD, numf);
console.log("The number of files on the SD card is: " + numf.getitem(0));

var curf = new MP3Player.uint16Array(0);
myMP3Player.getCurrentFile(curf);
console.log("The current file is: " + curf.getitem(0));

/*
// Example: set the date
var year = new MP3Player.uint16Array(0);
year.setitem(2015);
var month = new MP3Player.uint8Array(0);
month.setitem(1);
var day = new MP3Player.uint8Array(0);
day.setitem(1);
myMP3Player.setDate(year, month, day);

// Example: set the date
var hour = new MP3Player.uint8Array(0);
hour.setitem(12);
var minute = new MP3Player.uint8Array(0);
minute.setitem(30);
var second = new MP3Player.uint8Array(0);
second.setitem(30);
myMP3Player.setTime(hour, minute, second);
*/

var year = new MP3Player.uint16Array(0);
var month = new MP3Player.uint8Array(0);
var day = new MP3Player.uint8Array(0);
myMP3Player.getDate(year, month, day);
var mp3date = month.getitem(0) + "/";
mp3date += (day.getitem(0) + "/");
mp3date += year.getitem(0);
console.log("The device date is: " + mp3date);

var hour = new MP3Player.uint8Array(0);
var minute = new MP3Player.uint8Array(0);
var second = new MP3Player.uint8Array(0);
myMP3Player.getTime(hour, minute, second);
var mp3time = hour.getitem(0) + ":";
mp3time += (minute.getitem(0) + ":");
mp3time += second.getitem(0);
console.log("The device time is: " + mp3time);

// Print message when exiting
process.on('SIGINT', function()
{
	console.log("Exiting...");
	process.exit(0);
});