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<html><head>
<title>yosys.js example application</title>
</head><body onload="document.getElementById('command').focus()">
<h1>yosys.js example application</h1>
<table width="100%"><tr><td><div id="tabs"></div></td><td align="right"><tt>[ <span onclick="load_example()">load example</span> ]</tt></td></tr></table>
<iframe id="viz" style="display: none"><script type="text/javascript" src="viz.js"></script></iframe>
<svg id="svg" style="display: none; position: absolute; padding: 10px; width: 100%; height: 80%;"></svg>
<div><textarea id="output" style="width: 100%" rows="30" cols="100"></textarea></div>
<div id="wait" style="display: block"><br/><b><span id="waitmsg">Loading...</span></b></div>
<div id="input" style="display: none"><form onsubmit="window.setTimeout(run_command); return false"><tt><span id="prompt">
</span></tt><input id="command" type="text" onkeydown="history(event)" style="font-family: monospace; font-weight: bold;" size="100"></form></div>
<script type='text/javascript'>
var got_log_messages = false;
var history_log = [];
var history_index = 0;
var history_bak = "";
function history(ev) {
if (ev.keyCode == 38) {
el = document.getElementById('command');
if (history_index == history_log.length)
history_bak = el.value
if (history_index > 0)
el.value = history_log[--history_index];
}
if (ev.keyCode == 40) {
if (history_index < history_log.length) {
el = document.getElementById('command');
if (++history_index < history_log.length)
el.value = history_log[history_index];
else
el.value = history_bak;
}
}
}
var Module = {
print: (function() {
var element = document.getElementById('output');
if (element) element.value = ''; // clear browser cache
return function(text) {
if (!got_log_messages) {
window.setTimeout(startup, 50);
got_log_messages = true;
}
if (element && typeof(text) != "number") {
element.value += text + "\n";
element.scrollTop = element.scrollHeight; // focus on bottom
}
};
})(),
printErr: (function() {
var element = document.getElementById('output');
if (element) element.value = ''; // clear browser cache
return function(text) {
if (element && typeof(text) != "number") {
console.log(text);
if (got_log_messages) {
element.value += text + "\n";
element.scrollTop = element.scrollHeight; // focus on bottom
}
}
};
})(),
};
var current_file = "";
var console_messages = "";
var svg_cache = { };
function update_tabs() {
var f, html = "", flist = FS.readdir('.');
if (current_file == "") {
html += '<tt>[ <b>Console</b>';
} else {
html += '<tt>[ <span onclick="open_file(\'\')">Console</span>';
}
for (i in flist) {
f = flist[i]
if (f == "." || f == "..")
continue;
if (current_file == f) {
html += ' | <b>' + f + '</b>';
} else {
html += ' | <span onclick="open_file(\'' + f + '\')">' + f + '</span>';
}
}
html += ' | <span onclick="open_file(prompt(\'Filename:\'))">new file</span> ]</tt>';
document.getElementById('tabs').innerHTML = html;
if (current_file == "" || /\.dot$/.test(current_file)) {
var element = document.getElementById('output');
element.readOnly = true;
element.scrollTop = element.scrollHeight; // focus on bottom
document.getElementById('command').focus();
} else {
document.getElementById('output').readOnly = false;
document.getElementById('output').focus();
}
}
function open_file(filename)
{
if (current_file == "")
console_messages = document.getElementById('output').value;
else if (!/\.dot$/.test(current_file))
FS.writeFile(current_file, document.getElementById('output').value, {encoding: 'utf8'});
if (filename == "") {
document.getElementById('output').value = console_messages;
} else {
try {
document.getElementById('output').value = FS.readFile(filename, {encoding: 'utf8'});
} catch (e) {
document.getElementById('output').value = "";
FS.writeFile(filename, document.getElementById('output').value, {encoding: 'utf8'});
}
}
if (/\.dot$/.test(filename)) {
dot = document.getElementById('output').value;
if (!(dot in svg_cache)) {
el = document.getElementById('viz');
svg_cache[dot] = el.contentWindow.Viz(dot, "svg");
}
document.getElementById('svg').innerHTML = svg_cache[dot];
document.getElementById('svg').style.display = 'block';
document.getElementById('output').value = '';
} else {
document.getElementById('svg').innerHTML = '';
document.getElementById('svg').style.display = 'none';
}
current_file = filename;
update_tabs()
}
function startup() {
el = document.getElementById('viz');
el.contentWindow.document.open();
el.contentWindow.document.write('<script type="text/javascript" src="viz.js"></' + 'script>');
el.contentWindow.document.close();
document.getElementById('wait').style.display = 'none';
document.getElementById('input').style.display = 'block';
document.getElementById('waitmsg').textContent = 'Waiting for yosys.js...';
document.getElementById('prompt').textContent = yosys_prompt();
try { FS.mkdir('/work'); } catch (e) { }
FS.chdir('/work');
update_tabs();
console.log('yosys.js loaded.');
}
function load_example() {
open_file('')
var txt = "";
txt += "// a simple yosys.js example. run \"script example.ys\".\n";
txt += "\n";
txt += "module example(input clk, input rst, input inc, output reg [3:0] cnt);\n";
txt += " always @(posedge clk) begin\n";
txt += " if (rst)\n";
txt += " cnt <= 0;\n";
txt += " else if (inc)\n";
txt += " cnt <= cnt + 1;\n";
txt += " end\n";
txt += "endmodule\n";
txt += "\n";
FS.writeFile('example.v', txt, {encoding: 'utf8'});
var txt = "";
txt += "# a simple yosys.js example. run \"script example.ys\".\n";
txt += "\n";
txt += "design -reset\n";
txt += "read_verilog example.v\n";
txt += "proc\n";
txt += "opt\n";
txt += "show\n";
txt += "\n";
FS.writeFile('example.ys', txt, {encoding: 'utf8'});
open_file('example.ys')
document.getElementById('command').focus();
}
function yosys_command(cmd) {
Module.ccall('run', '', ['string'], [cmd])
}
function yosys_prompt() {
return Module.ccall('prompt', 'string', [], [])
}
function run_command() {
var cmd = document.getElementById('command').value;
document.getElementById('command').value = '';
if (history_log.length == 0 || history_log[history_log.length-1] != cmd)
history_log.push(cmd);
history_index = history_log.length;
var show_dot_before = "";
try { show_dot_before = FS.readFile('show.dot', { encoding: 'utf8' }); } catch (e) { }
open_file('');
Module.print(yosys_prompt() + cmd);
document.getElementById('wait').style.display = 'block';
document.getElementById('input').style.display = 'none';
function run_command_bh() {
try {
yosys_command(cmd);
} catch (e) {
Module.print('Caught JavaScript exception. (see JavaScript console for details.)');
console.log(e);
}
document.getElementById('wait').style.display = 'none';
document.getElementById('input').style.display = 'block';
document.getElementById('prompt').textContent = yosys_prompt();
var show_dot_after = "";
try { show_dot_after = FS.readFile('show.dot', { encoding: 'utf8' }); } catch (e) { }
if (show_dot_before != show_dot_after)
open_file('show.dot');
update_tabs();
}
window.setTimeout(run_command_bh, 50);
return false;
}
</script>
<script async type="text/javascript" src="yosys.js"></script>
</body></html>
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