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<html><head>
<title>YosysJS Example Application #01</title>
<script type="text/javascript" src="yosysjs.js"></script>
</head><body onload="document.getElementById('command').focus()">
<h1>YosysJS Example Application #01</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>
<svg id="svg" style="display: none; position: absolute; padding: 10px; width: calc(100% - 40px); height: 480px;"></svg>
<div><textarea id="output" style="width: 100%; height: 500px"></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"><br/><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'>
function print_output(text) {
var el = document.getElementById('output');
el.value += text + "\n";
}
YosysJS.load_viz();
var ys = YosysJS.create("", function() {
print_output(ys.print_buffer);
document.getElementById('wait').style.display = 'none';
document.getElementById('input').style.display = 'block';
document.getElementById('waitmsg').textContent = 'Waiting for yosys.js...';
document.getElementById('prompt').textContent = ys.prompt();
update_tabs();
});
ys.echo = true;
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 current_file = "";
var console_messages = "";
var svg_cache = { };
function update_tabs() {
var f, html = "", flist = ys.read_dir('.');
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))
ys.write_file(current_file, document.getElementById('output').value);
if (filename == "") {
document.getElementById('output').value = console_messages;
} else {
try {
document.getElementById('output').value = ys.read_file(filename);
} catch (e) {
document.getElementById('output').value = "";
ys.write_file(filename, document.getElementById('output').value);
}
}
if (/\.dot$/.test(filename)) {
dot = document.getElementById('output').value;
YosysJS.dot_into_svg(dot, 'svg');
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() {
}
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";
ys.write_file('example.v', txt);
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";
ys.write_file('example.ys', txt);
open_file('example.ys')
document.getElementById('command').focus();
}
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 = ys.read_file('show.dot'); } catch (e) { }
open_file('');
document.getElementById('wait').style.display = 'block';
document.getElementById('input').style.display = 'none';
function run_command_bh() {
try {
ys.run(cmd);
} catch (e) {
ys.write('Caught JavaScript exception. (see JavaScript console for details.)');
console.log(e);
}
print_output(ys.print_buffer);
document.getElementById('wait').style.display = 'none';
document.getElementById('input').style.display = 'block';
document.getElementById('prompt').textContent = ys.prompt();
var show_dot_after = "";
try { show_dot_after = ys.read_file('show.dot'); } catch (e) { }
if (show_dot_before != show_dot_after)
open_file('show.dot');
update_tabs();
}
window.setTimeout(run_command_bh, 50);
return false;
}
</script>
</body></html>
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