2017-06-21 00:00:20 +00:00
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<!DOCTYPE html>
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<html>
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<head>
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<link rel="stylesheet" href="dygraph.css">
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<title>Get data INA219</title>
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<script type="text/javascript" src="dygraph.js"></script>
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</head>
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<body>
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<h3 style="width:800px; text-align: center;">Read regs U & I INA219</h3>
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2017-07-01 01:16:36 +00:00
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<div id="div_v" style="width:800px; height:400px;"></div>
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2017-06-21 00:00:20 +00:00
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<script type="text/javascript">
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2017-07-01 01:16:36 +00:00
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var datau = [];
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//var datai = [];
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var gu = new Dygraph(
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document.getElementById("div_v"),
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datau,
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2017-06-21 00:00:20 +00:00
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{
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2017-07-01 01:16:36 +00:00
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labels: ['X', 'I', 'U'],
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// drawPoints: true,
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rollPeriod: 100,
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// errorBars: true,
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// showRoller: true,
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y2label: 'U(mV)',
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ylabel: 'I(mA)',
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series : {
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'U': { axis: 'y2' }
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}
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// , axes: { y: {valueRange: [4500, 5500] }, y2: {valueRange: [75, 125] }}
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});
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2017-06-21 00:00:20 +00:00
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var oldblkid = 0;
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var rdnextflg = false;
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var cur_idx = 0;
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2017-07-01 01:16:36 +00:00
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var sig = 10;
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2017-06-21 00:00:20 +00:00
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ws = new WebSocket('ws://rtl871x0/web.cgi');
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ws.binaryType = 'arraybuffer';
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2017-07-01 01:16:36 +00:00
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ws.onopen = function(){ws.send('ina219'); ws.send('pr=0')};
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2017-06-21 00:00:20 +00:00
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ws.onmessage = function (event) {
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if(event.data instanceof ArrayBuffer) {
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var wordarray = new Int16Array(event.data);
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if(wordarray.length > 2) {
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var blksz = wordarray[0];
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if(wordarray.length == blksz*2 + 2) {
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var blkid = wordarray[1] & 0xFFFF;
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if(rdnextflg) {
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cur_idx += (blkid - oldblkid) & 0xFFFF;
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} else rdnextflg = true;
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oldblkid = blkid + blksz;
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for (var i=2; i<wordarray.length; i+=2) {
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2017-07-01 01:16:36 +00:00
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if(cur_idx > 10000 ) datau.shift();
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datau.push([cur_idx, wordarray[i+1], wordarray[i]*0.5 ]);
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2017-06-21 00:00:20 +00:00
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cur_idx++;
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}
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2017-07-01 01:16:36 +00:00
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gu.updateOptions({'file':datau});
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2017-06-21 00:00:20 +00:00
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}
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}
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ws.send("ina219");
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}
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}
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</script>
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</body>
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</html>
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