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+<html><head>
+ <title>YosysJS Example Application #01</title>
+</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>
+ <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>
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 14:43:34 +0000