2018-03-04 11:05:52 +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="ina2.css">
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<title>Get ADC data</title>
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</head>
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<body>
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<div style="height: auto; width: auto; text-align: center;">
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<div id='div_v' style="height:512px;">
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<canvas id='scope' width=975 height=512></canvas>
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</div>
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Window: <span id='wdsize'>?</span> sec, Sample Rate: <span id='smprate'>?</span> smps
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<div>
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<span id='labdiv'>?</span>
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<input type="button" id="butOnOff" value="Stop">
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<input type="button" id="butSave" value="Save data.csv"><br>
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</div>
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</div>
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</body>
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<script type="text/javascript">
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var $ = function(id) {return document.getElementById(id);}
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var smprate = 3900; // adc1: 3900 sps, adc2: 1950 sps, adc4: 975 sps, adc8: 487.5 sps
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var sttim = 0;
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var cur_idx = 0;
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var old_idx = 0;
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var frend = 0;
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function wsSmpRate() {
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var idx = cur_idx, tt = new Date().getTime();
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var sps = (idx - old_idx) * 1000/ (tt - sttim);
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sttim = tt; old_idx = idx;
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if(smprate) smprate = smprate * 0.9 + sps * 0.1;
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else smprate = sps;
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$('smprate').innerHTML = smprate.toFixed(1);
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$('wdsize').innerHTML = ($('scope').width/smprate).toFixed(2);
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$('labdiv').innerHTML = 'Render ' + frend + ' Hz';
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frend = 0;
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}
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var samples = smprate*3;
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var rend = 1;
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var oldblkid = 0;
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var rdnextflg = false;
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$("butOnOff").onclick = function() {
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if(rend) {rend = 0; $("butOnOff").value = "Run";}
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else {rend = 1; $("butOnOff").value = "Stop";}
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}
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var data_ch1 = [];
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var data_ch2 = [];
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var gu;
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function wsping() {
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clearTimeout(wstt);
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ws.send('adc*');
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wstt = setTimeout(wsping, 400);
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}
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var ctx = document.getElementById('scope').getContext('2d');
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function draw() {
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var width = ctx.canvas.width;
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var height = ctx.canvas.height;
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var timeData1 = data_ch1;
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var timeData2 = data_ch2;
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var scaling = height / 65536 / 2;
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var risingEdge = 0;
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var len = timeData1.length;
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ctx.fillStyle = 'rgba(0, 20, 0, 0.1)';
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ctx.fillRect(0, 0, width, height);
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ctx.lineWidth = 1;
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ctx.strokeStyle = 'rgb(0, 255, 0)';
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ctx.beginPath();
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while (timeData1[486 + risingEdge++] > 32768 && risingEdge <= width);
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if (risingEdge >= width) risingEdge = 0;
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while (timeData1[486 + risingEdge++] < 32768 && risingEdge <= width);
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if (risingEdge >= width) risingEdge = 0;
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for (var x = risingEdge; x < timeData1.length && x - risingEdge < width; x++)
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ctx.lineTo(x - risingEdge, height - timeData1[x] * scaling);
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ctx.moveTo(0,0);
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for (var x = risingEdge; x < timeData2.length && x - risingEdge < width; x++)
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ctx.lineTo(x - risingEdge, height - 256 - timeData2[x] * scaling);
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ctx.stroke();
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frend++;
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requestAnimationFrame(draw);
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}
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2018-04-20 07:53:32 +00:00
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var wsUri = 'ws://rtl871x0/web.cgi'
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2018-03-04 11:05:52 +00:00
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//var wsUri = "ws://"+window.location.host.toString()+"/web.cgi";
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ws = new WebSocket(wsUri);
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ws.binaryType = 'arraybuffer';
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ws.onopen = function(){
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ws.send('user=rtl871x:supervisor');
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ws.send('sys_debug=0');
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ws.send('adcz'); // drv deinit
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ws.send('adcy'); // mode 2 chls
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ws.send('adc1'); // decimation
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ws.send('adcd'); // xclk
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wstt = setTimeout(wsping,100);};
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ws.onmessage = function (event) {
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if(event.data instanceof ArrayBuffer) {
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clearTimeout(wstt);
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var wordarray = new Uint16Array(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) cur_idx += (blkid - oldblkid) & 0xFFFF;
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else {
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rdnextflg = true;
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sttim = new Date().getTime();
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setInterval(function(){wsSmpRate()}, 1000);
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$('wdsize').innerHTML = 975/smprate;
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draw();
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}
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oldblkid = blkid + blksz;
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for (var i=2; i<wordarray.length; i+=2) {
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if(rend) {
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if(data_ch1.length >= samples) {
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data_ch1.shift();
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data_ch2.shift();
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}
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data_ch1.push([wordarray[i]]);
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data_ch2.push([wordarray[i+1]]);
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}
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cur_idx++;
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} }
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wstt = setTimeout(wsping, 40);
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} } }
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function convertArrayOfObjectsToCSV(value){
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var result, ctr, keys, columnDelimiter, lineDelimiter, data;
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data = value.data || null;
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if (data == null || !data.length) {return null;}
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columnDelimiter = value.columnDelimiter || ';';
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lineDelimiter = value.lineDelimiter || '\n';
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keys = Object.keys(data[1]);
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result = '';
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result += keys.join(columnDelimiter);
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result += lineDelimiter;
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data.forEach(function(item){
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ctr = 0;
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keys.forEach(function(key){
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if (ctr > 0)
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result += columnDelimiter;
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result += item[key];
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ctr++;
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});
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result += lineDelimiter;
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});
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return result;
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}
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$("butSave").onclick = function() {
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var csv = convertArrayOfObjectsToCSV({data: datau});
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if (!csv.match(/^data:text\/csv/i)) {csv = 'data:text/csv;charset=utf-8,' + csv;}
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var encodedUri = encodeURI(csv);
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var link = document.createElement('a');
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link.setAttribute('href', encodedUri);
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link.setAttribute('download',"data.csv");
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link.click();
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}
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</script>
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</html>
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