<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="dygraph.css">
<title>Get data ADC</title>
<script type="text/javascript" src="dygraph.min.js"></script>
</head>
<body>
<h3 style="width:800px; text-align: center;">Read ADC RTL8711AM</h3>
<div id="div_g" style="width:800px; height:400px;"></div>
<script type="text/javascript">
var data = [];
var g = new Dygraph(document.getElementById("div_g"), data,
{ drawPoints: true, showRoller: true, labels: ['X', 'U']});
var oldblkid = 0;
var rdnextflg = false;
var cur_idx = 0;
ws = new WebSocket('ws://rtl871x0/web.cgi');
ws.binaryType = 'arraybuffer';
ws.onopen = function(){ws.send('adc')};
ws.onmessage = function (event) {
if(event.data instanceof ArrayBuffer) {
var wordarray = new Uint16Array(event.data);
if(wordarray.length > 2) {
var blksz = wordarray[0];
if(wordarray.length == blksz + 2) {
var blkid = wordarray[1];
if(rdnextflg) {
cur_idx += (blkid - oldblkid) & 0xFFFF;
} else rdnextflg = true;
oldblkid = blkid + blksz;
for (var i = 2; i < wordarray.length; i++) {
if(cur_idx > 1000 ) data.shift();
data.push([cur_idx++, wordarray[i]]);
}
g.updateOptions({'file':data});
}
}
ws.send("adc");
}
}
</script>
</body></html>