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flea-scope.manual.html
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<!DOCTYPE html>
<html lang="en">
<!-- FLEA-SCOPE -->
<!-- See: https://wicg.github.io/webusb/ -->
<!-- See: https://wicg.github.io/serial/ -->
<!-- top right bottom left -->
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=1870">
<title>Flea-Scope™</title>
<style>
body,select,input { background: #ededed }
pre { white-space: pre-wrap; word-wrap: break-word; }
a { text-decoration: none; }
#status { color: red; padding: 0px 10px 0px 10px; margin: 0px 0px 0px 0px; }
#copyright { font-size:65%; padding: 0px; margin: 0px; }
#help { font-size:75%; }
* { overflow-wrap: anywhere; word-wrap: anywhere; }
button { overflow-wrap: normal; word-wrap: normal; }
td { text-align: center; padding: 0px 10px 0px 0px; white-space: nowrap; }
html,button,input,select { font: 34px Arial, Helvetica, sans-serif; padding: 10px 8px 10px 8px; margin: 0px 0px 10px 0px; }
@media(min-width:80em){ html,button,input { font: 22px Arial, Helvetica, sans-serif; padding: 10px 8px 10px 8px; margin: 0px 0px 10px 0px; } }
@supports(-webkit-touch-callout:none) { button,input { -webkit-appearance: none; border-radius: 2px; } }
body,html { margin: 0px; }
select { direction: rtl; }
#wrapper { display: flex; padding: 10px 0px 10px 0px; }
#view { outline: red 1px solid; flex: 97; overflow-x: scroll; }
#canvas { padding: 3px; }
#view2 { flex: 3; padding: 0px 5px 0px 5px; }
#labels { width: 50px; }
#command { font-size:65%; }
.dark { filter: invert(1); background: #121212; }
</style>
</head>
<body onload='Body()'>
<h1 id="h1">Flea-Scope™</h1>
<div id="config">
<button type='button'
onclick="if (/\b(Linux|CrOS|Windows)\b/.test(navigator.userAgent) && ! navigator.userAgent.match(/android/i)) {
Comm();
} else {
Usb();
}">Start Connect</button>
<button type='button' id="start1" hidden=true onclick="Comm();">Start Connect Comm</button>
<button type='button' id="start2" hidden=true onclick="Usb();">Start Connect USB</button>
</div>
<table>
<tr>
<td>
<label for="qusec">secs/div:</label>
</td>
<td>
<label for="trigger">trigger:</label>
</td>
<td>
<label for="b0">b0:</label>
</td>
<td>
<label for="b1">b1:</label>
</td>
<td>
<label for="b2">b2:</label>
</td>
<td>
<label for="b3">b3:</label>
</td>
<td>
<label for="b4">b4:</label>
</td>
<td>
<label for="b5">b5:</label>
</td>
<td>
<label for="b6">b6:</label>
</td>
<td>
<label for="b7">b7:</label>
</td>
<td>
<label for="b8">b8:</label>
</td>
<td>
</td>
<td>
<label for="delay">delay sec:</label>
</td>
<td>
<label for="probe">probe:</label>
</td>
<td>
<label for="polar">signal:</label>
</td>
<td>
<label for="volts">volts:</label>
</td>
<td>
<label for="wave">wave out:</label>
</td>
<td>
<label for="hz">hertz out:</label>
</td>
</tr>
<tr>
<td>
<select id="qusec" onchange="ScaleCanvas(); Send(String.fromCharCode(3));">
<option value="-10">0.5u*</option>
<option value="-5">1u*</option>
<option value="-2">2.5u*</option>
<option value="1">5u</option>
<option value="2">10u</option>
<option value="5">25u</option>
<option value="10">50u</option>
<option value="20">100u</option>
<option value="50">250u</option>
<option value="100">500u</option>
<option value="200" selected>1m</option>
<option value="500">2.5m</option>
<option value="1000">5m</option>
<option value="2000">10m</option>
<option value="5000">25m</option>
<option value="10000">50m</option>
<option value="20000">100m</option>
</select>
</td>
<td>
<select id="trigger" onchange='Send(String.fromCharCode(3));'>
<option selected value="~">auto</option>
<option value="">level</option>
<option value="+">rise</option>
<option value="-">fall</option>
</select>
</td>
<td>
<select id="b0" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b1" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b2" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b3" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b4" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b5" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b6" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b7" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<select id="b8" onchange='Send(String.fromCharCode(3));'>
<option selected value="">-</option>
<option value="0">0</option>
<option value="1">1</option>
</select>
</td>
<td>
<button type="button" onclick="Clear()">clear</button>
</td>
<td>
<input type="text" id="delay" onchange='Send(String.fromCharCode(3));'' value="0u" size="2"></input>
</td>
<td>
<select id="probe" onchange='Send(String.fromCharCode(3)); Probe();'>
<option selected value="1">x1</option>
<option value="10">x10</option>
</select>
</td>
</td>
<td>
<select id="polar" onchange='Send(String.fromCharCode(3));'>
<option selected value="1">uni</option>
<option value="2">bi</option>
<option value="2.">ac</option>
</select>
<td>
<select id="volts" onchange='Send(String.fromCharCode(3));'>
<option value="0.18">0.18*</option>
<option value="0.25">0.25*</option>
<option value="0.33">0.33*</option>
<option value="0.5">0.5</option>
<option value="0.66">0.66</option>
<option value="1.0">1.0</option>
<option value="1.8">1.8</option>
<option value="2.5">2.5</option>
<option selected value="3.3">3.3</option>
<option value="5.0">5.0</option>
<option value="6.6">6.6</option>
</select>
</td>
<td>
<select id="wave" onchange="Wave();">
<option>ekg</option>
<option selected>sine</option>
<option>square</option>
<option>triangle</option>
</select>
</td>
<td>
<input type="text" id="hz" onchange="Wave();" value="1k" size="2"></input>
</td>
</tr>
</table>
<div id="wrapper">
<div id="view">
<div id="help">
<i>
To connect this graphical user interface web-page to your Flea-Scope:
<ol start=0>
<li>be sure you are using a <a href="https://en.wikipedia.org/wiki/Chromium_(web_browser)" target="_blank">Chromium-based web browser</a> that supports <a href="https://wicg.github.io/webusb/" target="_blank">WebUSB</a> and/or <a href="https://wicg.github.io/serial/" target="_blank">Web Serial</a></li>
<li>plug Flea-Scope's micro-USB connector into your computer, tablet, or phone, using a <u>USB data cable</u></li>
<ul>
<li>LED e1 (blue) should blink at 2Hz for 2 blinks, and then settle to a 1Hz blink while Flea-Scope is idle</li>
</ul>
<li><u>click or tap</u> the "Start Connect" button above to authorize web browser access to a selected USB device</li>
<ul>
<li>the web browser will open a WebUSB or Web Serial dialog box</li>
<li>you should see your Flea-Scope device listed in the WebUSB or Web Serial dialog box</li>
</ul>
<li><b><u>click or tap</u> the desired Flea-Scope USB device or serial port (or customized hostname) to select it!</b></li>
<li>finally, <u>click or tap</u> "Connect" to confirm the selected Flea-Scope USB device!</li>
</ol>
</i>
</div>
<canvas id="canvas" hidden=true></canvas>
</div>
<div id="view2">
<canvas id="labels"></canvas>
</div>
</div>
<table WIDTH="1870px">
<tr>
<td WIDTH=35%>
<button type="button" id="zero" onclick="CalZero();" title="touch probe tip to ground (GND) and press to calibrate zero">cal_zero</button>
<button type="button" id="3v3" onclick="Cal3v3();" title="touch probe tip to 3.3 volts (3V3) and press to calibrate 3.3 volts">cal_3v3</button>
<button type="button" id="pause" onclick="Pause();">pause</button>
<button type="button" id="single" onclick="Single();" disabled=true>single</button>
<button type="button" id="measure" onclick="Measure();">measure</button>
<button type="button" id="background" onclick="Background();">background</button>
<button type="button" id="bw" onclick="document.querySelector('body').classList.toggle('dark');">bw</button>
</td>
<td WIDTH=25%>
<pre id='status' color='red'></pre>
</td>
<td WIDTH=25%>
<pre id='voltage'></pre>
</td>
<td WIDTH=15%>
<pre id='command'></pre>
</td>
</table>
<p id='copyright'>
<a href=https://rtestardi.github.io/pages target=_blank>rtestardi's pages</a>
<a href=https://rtestardi.github.io/usbte/flea-scope.pdf target=_blank>Flea-Scope™ User's Guide</a>
<a href=https://rtestardi.github.io/StickOS target=_blank>StickOS® website</a>
<a href=https://github.com/rtestardi/usbte target=_blank>github.com/rtestardi/usbte</a>
<a href=https://github.com/rtestardi/StickOS2 target=_blank>github.com/rtestardi/StickOS2</a>
firmware version:
<span id="ver"></span>
<script>
'use strict';
var webpage;
var usb;
var comm;
var epin = 2;
var epout = 3;
var reader;
var writer;
var enc = new TextEncoder();
var dec = new TextDecoder();
var canvas;
var labels;
var bytes = 1024;
var discard;
var discarded;
var string = "";
var running = "";
var digital = false;
var bg = false;
var avgV = 0; // ac only
var analogV = 0; // 0..v or -v..v (must be multiplied by p!)
var measure = 0;
const MSPS = 18; // approximate target sample rate
const SAMPLES = 2000*MSPS/20; // approximate width of display canvas
const EXTRA = 200; // extra samples in case web page wants to fine-scale
const INTERLEAVE = 5; // we interleave results from 5 adcs
const DIVSV = 10;
const DIVST = 20;
const VERT = 4;
const bus_frequency = 120000000;
const bus_mhz = bus_frequency/1000000;
var msps; // actual based on mcu timer pr
var width = SAMPLES*2; // actual display width after ScaleCanvas()
var height = 256;
var bits = 9;
var ver;
var hostname = "";
var single = false;
var pause = false;
var down = false;
var waiting;
var cal_zero_x1;
var cal_3v3_x1;
var cal_zero_x10;
var cal_3v3_x10;
var oldX, newX;
var oldY, newY;
var adcfull = 6.6; // +/- at bnc
var adcrawcount = 0;
var adcrawsum = 0;
function ScaleCanvas()
{
// account for clock rounding inaccuracies at 18 Msps
var usecv = parseInt(document.getElementById("qusec").value); // this is per-division
if (usecv < 0) {
usecv = 1;
}
var pr = Math.floor(bus_mhz*usecv*INTERLEAVE/MSPS + 0.5);
msps = bus_mhz*INTERLEAVE/pr;
width = Math.floor(2*2000*msps*usecv/20);
canvas.setAttribute("width", width);
canvas.setAttribute("height", height+30*bits+20);
labels.setAttribute("width", 50);
labels.setAttribute("height", height+30*bits+20);
}
function Clear()
{
for (var b = 0; b < bits; b++) {
document.getElementById('b'+b).selectedIndex = 0;
};
document.getElementById('trigger').selectedIndex = 0;
document.getElementById('delay').value = "0u";
analogV = 0;
Send(String.fromCharCode(3));
}
function GetZero()
{
var a;
var p = parseFloat(document.getElementById("probe").value);
if (p == 1) {
a = cal_zero_x1;
} else {
a = cal_zero_x10;
}
if (a == undefined) {
document.getElementById("status").innerHTML = "please calibrate x" + p + " probe zero";
return p==1 ? 14 : 28; // default calibration values
}
return Number(a);
}
function CalZero()
{
if (adcrawcount) {
var p = parseFloat(document.getElementById("probe").value);
var t = Math.round((adcrawsum/adcrawcount - 512) * 4)/4;
if (p == 1) {
if (t >= -5 && t <= 23 || measure == 2) { // calibration limits
cal_zero_x1 = t;
once.push("cal_zero_x1 = " + (Math.round(cal_zero_x1*4)+1000));
} else {
document.getElementById("status").innerHTML = "FAILED " + t;
t = undefined;
}
} else {
if (t >= -5 && t <= 40 || measure == 2) { // calibration limits
cal_zero_x10 = t;
once.push("cal_zero_x10 = " + (Math.round(cal_zero_x10*4)+1000));
} else {
document.getElementById("status").innerHTML = "FAILED " + t;
t = undefined;
}
}
if (t != undefined) {
document.getElementById("status").innerHTML = "cal_zero_x"+p + " = " + GetZero();
}
}
}
function Get3v3()
{
var a, b;
var p = parseFloat(document.getElementById("probe").value);
if (p == 1) {
a = cal_3v3_x1;
b = cal_zero_x1;
} else {
a = cal_3v3_x10;
b = cal_zero_x10;
}
if (a == undefined) {
if (! (b == undefined)) {
document.getElementById("status").innerHTML = "cal_zero_x"+p + " = " + GetZero() + "\n" + "please calibrate x" + p + " probe 3v3";
}
return p==1 ? 259 : 270; // default calibration values
}
return Number(a);
}
function Cal3v3()
{
if (adcrawcount) {
var p = parseFloat(document.getElementById("probe").value);
var t = Math.round((adcrawsum/adcrawcount - GetZero() - 512) * p*4)/4;
if (p == 1) {
if (t >= 235 && t <= 275 || measure == 2) { // calibration limits
cal_3v3_x1 = t;
once.push("cal_3v3_x1 = " + (Math.round(cal_3v3_x1*4)+1000));
} else {
document.getElementById("status").innerHTML = "FAILED " + t;
t = undefined;
}
} else {
if (t >= 220 && t <= 300 || measure == 2) { // calibration limits
cal_3v3_x10 = t;
once.push("cal_3v3_x10 = " + (Math.round(cal_3v3_x10*4)+1000));
} else {
document.getElementById("status").innerHTML = "FAILED " + t;
t = undefined;
}
}
if (t != undefined) {
document.getElementById("status").innerHTML = "cal_3v3_x"+p + " = " + Get3v3();
}
}
}
function Probe()
{
var p = parseFloat(document.getElementById("probe").value);
var e = document.getElementById("volts");
for (var i = 0; i < e.options.length; i++) {
e.options[i].innerHTML = "" + +(e.options[i].value*p).toFixed(2);
}
}
function Pause()
{
if (! pause) {
pause = true;
document.getElementById('pause').innerHTML = "resume";
document.getElementById('pause').style.color = 'red';
document.getElementById('single').disabled = false;
document.getElementById('single').style.color = 'red';
} else {
pause = false;
document.getElementById('pause').innerHTML = "pause";
document.getElementById('pause').style.color = 'black';
document.getElementById('single').disabled = true;
document.getElementById('single').style.color = 'black';
}
}
function Single()
{
single = true;
}
function Background()
{
if (! bg) {
bg = true;
document.getElementById('background').innerHTML = "foreground";
} else {
bg = false;
document.getElementById('background').innerHTML = "background";
}
}
function Wave()
{
var pattern = document.getElementById("wave").value;
var hz = document.getElementById("hz").value;
if (hz.toLowerCase().match(/k$/)) {
hz = Math.floor(Number(hz.replace(/k$/, "")*1000));
} else if (hz.toLowerCase().match(/m$/)) {
hz = Math.floor(Number(hz.replace(/m$/,"")*1000000));
}
once.push("wave " + pattern + " " + hz);
}
// return time for fraction of display width
function usec(frac, scale, fixed)
{
var usecv = parseInt(document.getElementById("qusec").value); // this is per-division
if (usecv < 0) {
usecv = -5/usecv;
} else {
usecv *= 5;
}
usecv = usecv * DIVST * frac;
var usecs;
if (scale && usecv >= 1000) {
usecs = "" + (usecv/1000).toFixed(fixed) + "ms";
} else {
usecs = "" + (usecv).toFixed(fixed) + "us";
}
return usecs;
}
// return frequency for fraction of display width
function freq(frac, scale, fixed)
{
var usecv = parseInt(document.getElementById("qusec").value); // this is per-division
if (usecv < 0) {
usecv = -5/usecv;
} else {
usecv *= 5;
}
usecv = usecv * DIVST * frac;
var freqv = 1000000/usecv;
var freqs;
if (scale && freqv >= 1000000) {
freqs = "" + (freqv/1000000).toFixed(fixed) + "MHz";
} else if (scale && freqv >= 1000) {
freqs = "" + (freqv/1000).toFixed(fixed) + "kHz";
} else {
freqs = "" + (freqv).toFixed(fixed) + "Hz";
}
return freqs;
}
// return voltage for fraction (-1..1) of display height
function volt(frac, scale, fixed)
{
var v = parseFloat(document.getElementById("probe").value) * document.getElementById("volts").value;
var voltv = v * frac;
var volts;
if (scale && voltv < 0.01 && voltv > -0.01) {
volts = "" + (voltv*1000).toFixed(fixed) + "mV";
} else {
volts = "" + (voltv).toFixed(fixed) + "V";
}
return volts;
}
// return voltage for adc value -512..511 for -6.6V to 6.6V
function voltadc(adc, scale, fixed)
{
var voltv = (adc-512)/512*adcfull * parseFloat(document.getElementById("probe").value);
var volts;
if (scale && voltv < 0.01 && voltv > -0.01) {
volts = "" + (voltv*1000).toFixed(fixed) + "mV";
} else {
volts = "" + (voltv).toFixed(fixed) + "V";
}
return volts;
}
function ShowStatus()
{
var status = "";
if (newX != -1) {
var r = parseFloat(document.getElementById("polar").value);
status = "position: " + usec(newX/width, true, 2);
if (newY < height) {
status += ", " + volt((height/r-1-newY)/(height/r), true, 2);
}
var dx = Math.abs(oldX - newX);
var dy = Math.abs(oldY - newY);
if (oldY > 255 || newY > 255) {
dy = 0;
}
if (oldX != -1 && (dx || dy)) {
status = "delta: " + usec(dx/width, true, 2);
if (dx) {
status += ", " + freq(dx/width, true, 2);
}
if (newY < height) {
status += ", " + volt(dy/(height/r), true, 2);
}
}
}
document.getElementById("status").innerHTML = status;
}
function ShowPoints()
{
var x;
var y;
var ctx;
ctx = canvas.getContext('2d');
ctx.beginPath();
if (oldX >= 0 && oldY >= 0 && (oldX != newX || oldY != newY)) {
x = oldX;
y = oldY;
ctx.fillStyle = 'red';
ctx.arc(x, y, 4, 0, 2*Math.PI, false);
ctx.fill();
ctx.fillStyle = 'black';
}
if (newX >= 0 && newY >= 0) {
x = newX;
y = newY;
ctx.fillStyle = 'red';
ctx.arc(x, y, 4, 0, 2*Math.PI, false);
ctx.fill();
ctx.fillStyle = 'black';
}
}
function Measure()
{
if (measure) {
document.getElementById('measure').style.color = 'black';
document.getElementById('status').innerHTML = '';
measure = 0;
} else {
document.getElementById('measure').style.color = 'red';
measure = 2;
}
newX = oldX = -1;
}
// the user loaded the webpage; set up keyboard listeners
function Body()
{
webpage = location.pathname.split("/").slice(-1)[0];
if (webpage.match(/manual/)) {
document.getElementById("start1").hidden = false;
document.getElementById("start2").hidden = false;
document.getElementById("help").innerHTML += "<p>" + navigator.userAgent;
for (var vv in navigator) {
document.getElementById("help").innerHTML += vv + ", ";
}
document.getElementById("help").innerHTML += "</p>";
}
if (/\b(Linux)\b/.test(navigator.userAgent)) {
// linux gets ooo data at larger web serial buffer sizes
bytes = 256;
}
canvas = document.getElementById('canvas');
labels = document.getElementById('labels');
ScaleCanvas();
canvas.addEventListener('mousedown', function(e) {
var v = parseFloat(document.getElementById("volts").value);
var p = parseFloat(document.getElementById("probe").value);
var r = parseFloat(document.getElementById("polar").value);
down = true;
if (! measure) {
Send(String.fromCharCode(3)); // Ctrl-C
var analogY = Math.min(Math.max(e.offsetY, 0), 255); // 0..255 (0..height-1)
analogV = (height/r - (analogY+1))/(height/r)*v; // 0..v or -v..v
analogV += avgV;
document.getElementById("status").innerHTML = "trigger = " + (analogV*p).toFixed(2) + "V";
Display();
} else {
if (measure == 1) {
oldX = newX;
oldY = newY;
newX = e.offsetX;
newY = e.offsetY;
document.getElementById('measure').style.color = 'black';
measure = 0;
} else {
newX = e.offsetX;
newY = e.offsetY;
measure = 1;
}
ShowStatus();
ShowPoints();
}
});
canvas.addEventListener('mouseup', function(e) {
down = false;
});
}
// the user wants to connect to a USB device's bulk endpoints directly
async function Usb()
{
var filter = [
{ vendorId: 0x0403, productId: 0xA660 },
{ vendorId: 0x1b4f, productId: 0xA660 },
{ vendorId: 0x1b4f, productId: 0xE66E },
{ vendorId: 0x04D8, productId: 0xE66E },
];
usb = undefined;
comm = undefined;
reader = undefined;
writer = undefined;
if ('usb' in navigator) {
try {
usb = await navigator.usb.requestDevice({ filters: filter });
await usb.open();
await usb.selectConfiguration(1);
await usb.claimInterface(1);
document.getElementById("config").hidden = true;
document.getElementById("help").hidden = true;
document.getElementById("canvas").hidden = false;
discard = 1;
setTimeout(Receive, 1);
Send(String.fromCharCode(3)); // Ctrl-C
await new Promise(r => setTimeout(r, 200)); // allow autorun program to stop?
Send("echo off\n"); // XXX -- figure out how to undo?
Send("prompt off\n"); // XXX -- figure out how to undo?
Send("dim unused[8] as flash\n");
Send("dim cal_zero_x1 as flash, cal_3v3_x1 as flash\n");
Send("dim cal_zero_x10 as flash, cal_3v3_x10 as flash\n");
Wave();
discarded = false;
setTimeout(Discard, 200);
} catch(err) {
document.getElementById("help").innerHTML += "<p><font color='red'>" + err.message.replace(/</g,'<').replace(/>/g,'>') + "</font></p>";
}
} else {
document.getElementById("help").innerHTML += "<p><font color='red'>WebUSB API not found.</font></p>";
}
}
// the user wants to connect to an emulated COM port
async function Comm()
{
var filter = [
{ usbVendorId: 0x0403, usbProductId: 0xA660 },
{ usbVendorId: 0x1b4f, usbProductId: 0xA660 },
{ usbVendorId: 0x1b4f, usbProductId: 0xE66E },
{ usbVendorId: 0x04D8, usbProductId: 0xE66E },
];
usb = undefined;
comm = undefined;
reader = undefined;
writer = undefined;
if ('serial' in navigator) {
try {
comm = await navigator.serial.requestPort({ filters: filter });
await comm.open({ baudRate: 115200, bufferSize: bytes });
reader = comm.readable.getReader();
writer = comm.writable.getWriter();
document.getElementById("config").hidden = true;
document.getElementById("help").hidden = true;
document.getElementById("canvas").hidden = false;
discard = 1;
setTimeout(Receive, 1);
Send(String.fromCharCode(3)); // Ctrl-C
await new Promise(r => setTimeout(r, 200)); // allow autorun program to stop?
Send("echo off\n"); // XXX -- figure out how to undo?
Send("prompt off\n"); // XXX -- figure out how to undo?
Send("dim unused[8] as flash\n");
Send("dim cal_zero_x1 as flash, cal_3v3_x1 as flash\n");
Send("dim cal_zero_x10 as flash, cal_3v3_x10 as flash\n");
Wave();
discarded = false;
setTimeout(Discard, 200);
} catch(err) {
document.getElementById("help").innerHTML += "<p><font color='red'>" + err.message.replace(/</g,'<').replace(/>/g,'>') + "</font></p>";
}
} else {
document.getElementById("help").innerHTML += "<p><font color='red'>Web Serial API not found.</font></p>";
}
}
async function Discard()
{
if (discarded) {
discarded = false;
setTimeout(Discard, 200);
} else {
discard = 0;
setTimeout(Next, 1);
}
}
var once = [
"print cal_zero_x1, cal_3v3_x1, cal_zero_x10, cal_3v3_x10",
"ver",
"hostname"
];
async function Next()
{
if (once.length) {
SendCommand(once.shift());
} else {
if (single) {
single = false;
setTimeout(Scope, 1);
} else if (down || pause) {
Display();
setTimeout(Next, 300);
} else {
setTimeout(Scope, 1);
}
}
}
async function WarnCommand()
{
document.getElementById('command').style.color = 'red';
document.getElementById("command").innerHTML += " [waiting]";
string = "";
Display();
}
async function SendCommand(command)
{
string = "";
waiting = setTimeout(WarnCommand, 3000);
document.getElementById('command').style.color = 'black';
document.getElementById("command").innerHTML = command;
Send(command + "\n");
}
async function Scope()
{
var v = parseFloat(document.getElementById("volts").value);
var p = parseFloat(document.getElementById("probe").value);
var r = parseFloat(document.getElementById("polar").value);
digital = false;
var number1 = document.getElementById("qusec").value;
var number2;
var number3;
var number4;
var number5;
for (var b = 0; b < bits; b++) {
if (document.getElementById("b"+b).value != "") {
digital = true;
}
}
if (digital) {
var mask = 0;
var sel = 0;
for (b = 0; b < bits; b++) {
if (document.getElementById("b"+b).value != "") {
mask |= 1<<b;
}
if (document.getElementById("b"+b).value == "1") {
sel |= 1<<b;
}
}
number2 = document.getElementById("trigger").value;
number2 += "0x" + sel.toString(16);
number3 = "0x" + mask.toString(16);
} else {
number2 = document.getElementById("trigger").value;
var adcscaled = (analogV+adcfull)/(adcfull*2)*1024;
if (adcscaled > 1023) {
adcscaled = 1023;
} else if (adcscaled < 0) {
adcscaled = 0;
}
number2 += Math.floor((adcscaled-512)*Get3v3()/256 + GetZero() + 512);
number3 = 0;
}
number4 = document.getElementById("delay").value;
if (number4.toLowerCase().match(/u$/)) {
number4 = Math.floor(Number(number4.replace(/u$/,""))*1);
} else if (number4.toLowerCase().match(/m$/)) {
number4 = Math.floor(Number(number4.replace(/m$/,""))*1000);
} else {
number4 = Math.floor(Number(number4)*1);
}
number4 = Math.floor(number4 * msps); // convert from us to samples
var command = "scope " + number1 + " " + number2 + " " + number3 + " " + number4;
SendCommand(command);
}
async function Display()
{
// result is in string
var lines = string.split(/\r?\n/);
var bw = document.querySelector('body').classList.contains('dark')
var ctx;
// draw vertical labels
ctx = labels.getContext('2d');
ctx.clearRect(0, 0, 50, 546);
ctx.font = `12px Verdana`;
var v = parseFloat(document.getElementById("volts").value);
var p = parseFloat(document.getElementById("probe").value);
var r = parseFloat(document.getElementById("polar").value);
var ac = document.getElementById("polar").value == "2.";
// voltage
if (document.getElementById("polar").value == 1) {
ctx.fillText("" + +(v*p).toFixed(2) + "V", 0, 10);
ctx.fillText("" + +(v*p/2).toFixed(2) + "V", 0, 128);
ctx.fillText("0V", 0, 256);
} else {
ctx.fillText("+" + +(v*p).toFixed(2) + "V", 0, 10);
if (document.getElementById("polar").value == "2") {
ctx.fillText("0V", 0, 128);
} else {
ctx.fillText("avg V", 0, 128);
}
ctx.fillText("-" + +(v*p).toFixed(2) + "V", 0, 256);
}
var b;
// bits
for (b = 0; b < bits; b++) {