2013-01-26 01:07:43 +01:00
|
|
|
<!DOCTYPE html>
|
|
|
|
|
<html>
|
|
|
|
|
<body>
|
|
|
|
|
<head>
|
|
|
|
|
<script>
|
|
|
|
|
var frames = [];
|
2013-01-27 21:42:40 +01:00
|
|
|
var currentFrame = 0;
|
2013-01-26 01:07:43 +01:00
|
|
|
|
|
|
|
|
var modes_checksum_table = [
|
|
|
|
|
0x3935ea, 0x1c9af5, 0xf1b77e, 0x78dbbf, 0xc397db, 0x9e31e9, 0xb0e2f0, 0x587178,
|
|
|
|
|
0x2c38bc, 0x161c5e, 0x0b0e2f, 0xfa7d13, 0x82c48d, 0xbe9842, 0x5f4c21, 0xd05c14,
|
|
|
|
|
0x682e0a, 0x341705, 0xe5f186, 0x72f8c3, 0xc68665, 0x9cb936, 0x4e5c9b, 0xd8d449,
|
|
|
|
|
0x939020, 0x49c810, 0x24e408, 0x127204, 0x093902, 0x049c81, 0xfdb444, 0x7eda22,
|
|
|
|
|
0x3f6d11, 0xe04c8c, 0x702646, 0x381323, 0xe3f395, 0x8e03ce, 0x4701e7, 0xdc7af7,
|
|
|
|
|
0x91c77f, 0xb719bb, 0xa476d9, 0xadc168, 0x56e0b4, 0x2b705a, 0x15b82d, 0xf52612,
|
|
|
|
|
0x7a9309, 0xc2b380, 0x6159c0, 0x30ace0, 0x185670, 0x0c2b38, 0x06159c, 0x030ace,
|
|
|
|
|
0x018567, 0xff38b7, 0x80665f, 0xbfc92b, 0xa01e91, 0xaff54c, 0x57faa6, 0x2bfd53,
|
|
|
|
|
0xea04ad, 0x8af852, 0x457c29, 0xdd4410, 0x6ea208, 0x375104, 0x1ba882, 0x0dd441,
|
|
|
|
|
0xf91024, 0x7c8812, 0x3e4409, 0xe0d800, 0x706c00, 0x383600, 0x1c1b00, 0x0e0d80,
|
|
|
|
|
0x0706c0, 0x038360, 0x01c1b0, 0x00e0d8, 0x00706c, 0x003836, 0x001c1b, 0xfff409,
|
|
|
|
|
0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
|
|
|
|
|
0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
|
|
|
|
|
0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000
|
|
|
|
|
];
|
|
|
|
|
|
|
|
|
|
function modesChecksum(frame) {
|
|
|
|
|
var crc = 0;
|
|
|
|
|
var bits = frame.bits;
|
|
|
|
|
var offset = (bits == 112) ? 0 : (112-56);
|
|
|
|
|
|
|
|
|
|
for(var j = 0; j < bits; j++) {
|
|
|
|
|
var byte = j/8;
|
|
|
|
|
var bit = j%8;
|
|
|
|
|
var bitmask = 1 << (7-bit);
|
|
|
|
|
|
|
|
|
|
/* If bit is set, xor with corresponding table entry. */
|
|
|
|
|
if (frame.hex.charCodeAt(byte) & bitmask)
|
|
|
|
|
crc ^= modes_checksum_table[j+offset];
|
|
|
|
|
}
|
|
|
|
|
return crc; /* 24 bit checksum. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
function getFrameChecksum(frame) {
|
|
|
|
|
var res = "";
|
|
|
|
|
for (j = 0; j < frame.hex.length; j++) {
|
|
|
|
|
var val = frame.hex.charCodeAt(j);
|
|
|
|
|
var h = val.toString(16);
|
|
|
|
|
if (h.length == 1) h = "0"+h;
|
|
|
|
|
res += h;
|
|
|
|
|
}
|
|
|
|
|
return res;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
function displayFrame(i) {
|
|
|
|
|
var div = document.getElementById("frame");
|
|
|
|
|
var msgbits = 8+112;
|
|
|
|
|
var frame = frames[i];
|
|
|
|
|
var padding = frame.mag.length - msgbits*2;
|
|
|
|
|
|
|
|
|
|
/* Remove the old representation. */
|
|
|
|
|
var nodes = div.childNodes.length;
|
|
|
|
|
for(var j = 0; j < nodes; j++) {
|
|
|
|
|
div.removeChild(div.firstChild);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Display the new one. */
|
|
|
|
|
for (var j = -padding; j < msgbits*2+padding; j++) {
|
|
|
|
|
var m = frame.mag[j+padding];
|
|
|
|
|
var type;
|
|
|
|
|
|
|
|
|
|
if (j < 0) type = "noise";
|
|
|
|
|
if (j >= 0 && j < 16) type = "pre";
|
|
|
|
|
if (j >= 16) {
|
|
|
|
|
if (!(j % 2)) {
|
|
|
|
|
var next = frame.mag[j+padding+1];
|
|
|
|
|
if (m > next)
|
|
|
|
|
type = "one";
|
|
|
|
|
else
|
|
|
|
|
type = "zero";
|
|
|
|
|
}
|
|
|
|
|
var bit = (j-16)/2;
|
|
|
|
|
if (bit == frame.fix1 ||
|
|
|
|
|
bit == frame.fix2)
|
|
|
|
|
type = "err";
|
|
|
|
|
}
|
|
|
|
|
var sample = document.createElement("div");
|
|
|
|
|
sample.setAttribute("class","sample "+type);
|
|
|
|
|
sample.setAttribute("title","sample "+j+" ("+m+")");
|
|
|
|
|
sample.style.left = ""+((j+padding)*4)+"px";
|
|
|
|
|
sample.style.height = ""+(m/256)+"px";
|
|
|
|
|
div.appendChild(sample);
|
|
|
|
|
}
|
|
|
|
|
document.getElementById("info").innerHTML =
|
|
|
|
|
"#"+currentFrame+" "+frame.descr+"<br>"+
|
|
|
|
|
"Bits:"+frame.bits+"<br>"+
|
|
|
|
|
"DF : "+(frame.hex.charCodeAt(0) >> 3)+"<br>"+
|
|
|
|
|
"fix1: "+frame.fix1+"<br>"+
|
|
|
|
|
"fix2: "+frame.fix2+"<br>"+
|
|
|
|
|
"hex : "+getFrameChecksum(frame)+"<br>"+
|
|
|
|
|
"crc (computed): "+modesChecksum(frame).toString(16)+"<br>";
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
function recomputeHex(frame) {
|
|
|
|
|
var padding = frame.mag.length - (112+8)*2;
|
|
|
|
|
var b = [];
|
|
|
|
|
var hex = "";
|
|
|
|
|
|
|
|
|
|
/* Get bits */
|
|
|
|
|
for (var j = 0; j < frame.bits*2; j += 2) {
|
|
|
|
|
var bit;
|
|
|
|
|
var l = frame.mag[padding+j+16];
|
|
|
|
|
var r = frame.mag[padding+j+1+16];
|
|
|
|
|
if (l > r)
|
|
|
|
|
bit = 1;
|
|
|
|
|
else
|
|
|
|
|
bit = 0;
|
|
|
|
|
b.push(bit);
|
|
|
|
|
}
|
|
|
|
|
/* Pack into bytes */
|
|
|
|
|
for (j = 0; j < frame.bits; j+= 8) {
|
|
|
|
|
hex += String.fromCharCode(
|
|
|
|
|
b[j]<<7 |
|
|
|
|
|
b[j+1]<<6 |
|
|
|
|
|
b[j+2]<<5 |
|
|
|
|
|
b[j+3]<<4 |
|
|
|
|
|
b[j+4]<<3 |
|
|
|
|
|
b[j+5]<<2 |
|
|
|
|
|
b[j+6]<<1 |
|
|
|
|
|
b[j+7]);
|
|
|
|
|
}
|
|
|
|
|
frame.hex = hex;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
window.onload = function() {
|
|
|
|
|
document.getElementById("next").onclick = function() {
|
|
|
|
|
if (currentFrame != frames.length-1) currentFrame++;
|
|
|
|
|
displayFrame(currentFrame);
|
|
|
|
|
}
|
|
|
|
|
document.getElementById("prev").onclick = function() {
|
|
|
|
|
if (currentFrame != 0) currentFrame--;
|
|
|
|
|
displayFrame(currentFrame);
|
|
|
|
|
}
|
|
|
|
|
document.getElementById("re").onclick = function() {
|
|
|
|
|
recomputeHex(frames[currentFrame]);
|
|
|
|
|
displayFrame(currentFrame);
|
|
|
|
|
}
|
|
|
|
|
displayFrame(currentFrame);
|
|
|
|
|
}
|
|
|
|
|
</script>
|
|
|
|
|
<script src="frames.js"></script>
|
|
|
|
|
<style>
|
|
|
|
|
#frame {
|
|
|
|
|
width: 1024px;
|
|
|
|
|
height: 255px;
|
|
|
|
|
border: 1px #aaa solid;
|
|
|
|
|
position: relative;
|
|
|
|
|
}
|
|
|
|
|
.sample {
|
|
|
|
|
position: absolute;
|
|
|
|
|
bottom: 0px;
|
|
|
|
|
}
|
|
|
|
|
.pre {
|
|
|
|
|
width:4px;
|
|
|
|
|
background-color: orange;
|
|
|
|
|
}
|
|
|
|
|
.one {
|
|
|
|
|
width:4px;
|
|
|
|
|
background-color: #0000cc;
|
|
|
|
|
}
|
|
|
|
|
.zero {
|
|
|
|
|
width:4px;
|
|
|
|
|
background-color: #aaaaaa;
|
|
|
|
|
}
|
|
|
|
|
.err {
|
|
|
|
|
width:4px;
|
|
|
|
|
background-color: #cc6666;
|
|
|
|
|
}
|
|
|
|
|
.noise {
|
|
|
|
|
width:2px;
|
|
|
|
|
background-color: #ffffff;
|
|
|
|
|
border: 1px #aaa dotted;
|
|
|
|
|
}
|
|
|
|
|
</style>
|
|
|
|
|
</head>
|
|
|
|
|
<div id="frame">
|
|
|
|
|
</div>
|
|
|
|
|
<pre id="info">
|
|
|
|
|
</pre>
|
|
|
|
|
<input type="button" id="prev" value="Prev frame">
|
|
|
|
|
<input type="button" id="next" value="Next frame">
|
|
|
|
|
<input type="button" id="re" value="Recompute Hex">
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
