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<!-- be kind, this is just a test -->
 
<!-- be kind, this is just a test -->
−
<hr>
+
<script language="JavaScript">
 +
 
 +
var form;
 +
 
 +
var win_ubrr, fosc, baud;
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var row, ubrr, err;
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 +
function init()
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{
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form = document.forms["data"];
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form.fosc.value="1.000000";
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}
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function round (x, n)
 +
{
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n = Math.pow (10, n);
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x = Math.round (n*x)/n;
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return x;
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}
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function get_ubrr (baud, m)
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{
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var f = 1000000*fosc;
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var ubrra, bauda, erra;
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var ubrrb, baudb, errb;
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ubrr = f/(m*baud)-1;
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ubrra = Math.floor (ubrr);
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ubrrb = Math.ceil  (ubrr);
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bauda = f/(m*(ubrra+1));
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baudb = f/(m*(ubrrb+1));
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erra = bauda/baud-1;
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errb = baudb/baud-1;
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if (Math.abs (erra) < Math.abs (errb))
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{
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err = erra;
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ubrr = ubrra;
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}
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else
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{
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err = errb;
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ubrr = ubrrb;
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}
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err = round (err*100, 1);
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if (ubrr >= 10)
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ubrr += "=0x" + ubrr.toString(16);
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if (Math.abs (err) < 0.21)
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{
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err = "<b>"+err+"</b>";
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ubrr = "<b>"+ubrr+"</b>";
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}
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else if (Math.abs (err) > 10)
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{
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err = "&#150;";
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ubrr = err;
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}
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}
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function get_row (baud)
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{
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var color = ((row & 1) == 0) ? "#ffffff" : "#f0f0ff";
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var html = "<tr bgcolor=\""+color+"\">";
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var baudstr = baud;
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var ubrr0, err0;
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var ubrr1, err1;
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row++;
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if (baud > 9600)
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{
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baudstr = "" + (baud / 1000) + "k";
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}
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if (baud > 250000)
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{
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baudstr = "" + (baud / 1000000) + "M";
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}
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get_ubrr (baud, 16);
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ubrr0 = ubrr;
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err0 = err;
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get_ubrr (baud, 8);
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ubrr1 = ubrr;
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err1 = err;
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html += "<td>"+baudstr+"</td>";
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html += "<td align=\"center\">"+ubrr0+"</td>";
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html += "<td align=\"center\">"+err0+"</td>";
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html += "<td align=\"center\">"+ubrr1+"</td>";
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html += "<td align=\"center\">"+err1+"</td>";
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html += "</tr>\n";
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return html;
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}
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function write_ubrr_table ()
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{
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var html = "<center>";
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row = 0;
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html += "<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\">\n";
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html += "<tr><td rowspan=3><b>Baud<br>Rate<br>(bps)</b></td>";
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html += "<td colspan=4 align=\"center\"><b>f<sub>osc</sub> = "+fosc+" MHz</b></td></tr>\n";
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html += "<tr><td colspan=2 align=\"center\"><b>U2X = 0</b></td><td colspan=2 align=\"center\"><b>U2X = 1</b></td></tr>\n";
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html += "<tr><td align=\"center\"><b>UBRR</b></td><td align=\"center\"><b>Error (%)</b></td>";
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html += "<td align=\"center\"><b>UBRR</b></td><td align=\"center\"><b>Error (%)</b></td></tr>\n";
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html += get_row (2400);
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html += get_row (4800);
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html += get_row (9600);
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html += get_row (14400);
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html += get_row (19200);
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html += get_row (28800);
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html += get_row (38400);
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html += get_row (57600);
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html += get_row (76800);
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html += get_row (115200);
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html += get_row (230400);
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html += get_row (250000);
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html += get_row (500000);
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html += get_row (1000000);
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html += "</table></center>\n";
 +
 
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// alert (html);
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win_ubrr.document.writeln (html);
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}
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function open_ubrr_window (val)
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{
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fosc = parseFloat (val);
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if (win_ubrr)
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win_ubrr.close();
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win_ubrr = window.open ("about:blank", "ubrr", "toolbar=no, menubar=no, width=400");
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win_ubrr.focus();
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win_ubrr.document.close();
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// win_ubrr.document.open();
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// win_ubrr.document.location.href = "about:blank";
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var html = "<html>\n";
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html += "<head>\n"
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html += "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">\n";
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html += "<meta name=\"Author\" content=\"Georg-Johann Lay\">\n";
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html += "<title>ATMega8 Baudrate, fosc = "+fosc+" MHz</title>\n";
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html += "</head>\n"
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win_ubrr.document.writeln (html);
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html = "<body bgcolor=\"white\" text=\"black\">\n";
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win_ubrr.document.writeln (html);
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write_ubrr_table (fosc, baud);
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html = "</body>\n";
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html += "</html>\n";
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win_ubrr.document.writeln (html);
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win_ubrr.document.close();
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}
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function write_freq_button (frq)
 +
{
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html = "<input type=submit onclick=\"open_ubrr_window("+frq+")\" SIZE=\"120\" VALUE=\" "+frq+" MHz \">";
 +
 
 +
document.writeln (html);
 +
}
 +
 
 +
 
 +
</script>

Version vom 4. Dezember 2005, 01:57 Uhr

<script language="JavaScript">

var form;

var win_ubrr, fosc, baud; var row, ubrr, err;

function init() { form = document.forms["data"];

form.fosc.value="1.000000"; }

function round (x, n) { n = Math.pow (10, n); x = Math.round (n*x)/n; return x; }

function get_ubrr (baud, m) { var f = 1000000*fosc; var ubrra, bauda, erra; var ubrrb, baudb, errb;

ubrr = f/(m*baud)-1; ubrra = Math.floor (ubrr); ubrrb = Math.ceil (ubrr); bauda = f/(m*(ubrra+1)); baudb = f/(m*(ubrrb+1)); erra = bauda/baud-1; errb = baudb/baud-1;

if (Math.abs (erra) < Math.abs (errb)) { err = erra; ubrr = ubrra; } else { err = errb; ubrr = ubrrb; }

err = round (err*100, 1); if (ubrr >= 10) ubrr += "=0x" + ubrr.toString(16);

if (Math.abs (err) < 0.21) { err = ""+err+""; ubrr = ""+ubrr+""; } else if (Math.abs (err) > 10) { err = "–"; ubrr = err; } }

function get_row (baud) { var color = ((row & 1) == 0) ? "#ffffff" : "#f0f0ff"; var html = "<tr bgcolor=\""+color+"\">"; var baudstr = baud; var ubrr0, err0; var ubrr1, err1;

row++;

if (baud > 9600) { baudstr = "" + (baud / 1000) + "k"; }

if (baud > 250000) { baudstr = "" + (baud / 1000000) + "M"; }

get_ubrr (baud, 16); ubrr0 = ubrr; err0 = err;

get_ubrr (baud, 8); ubrr1 = ubrr; err1 = err;

html += "<td>"+baudstr+"</td>"; html += "<td align=\"center\">"+ubrr0+"</td>"; html += "<td align=\"center\">"+err0+"</td>"; html += "<td align=\"center\">"+ubrr1+"</td>"; html += "<td align=\"center\">"+err1+"</td>"; html += "</tr>\n";

return html; }

function write_ubrr_table () {

var html = "
";

row = 0;

html += "\n"; html += ""; html += "\n"; html += "\n"; html += ""; html += "\n";

html += get_row (2400); html += get_row (4800); html += get_row (9600); html += get_row (14400); html += get_row (19200); html += get_row (28800); html += get_row (38400); html += get_row (57600); html += get_row (76800); html += get_row (115200); html += get_row (230400); html += get_row (250000); html += get_row (500000); html += get_row (1000000);

html += "
Baud
Rate
(bps)		fosc = "+fosc+" MHz
U2X = 0U2X = 1
UBRRError (%)UBRRError (%)
\n";

// alert (html);

win_ubrr.document.writeln (html); }

function open_ubrr_window (val) { fosc = parseFloat (val);

if (win_ubrr) win_ubrr.close(); win_ubrr = window.open ("about:blank", "ubrr", "toolbar=no, menubar=no, width=400"); win_ubrr.focus(); win_ubrr.document.close(); // win_ubrr.document.open(); // win_ubrr.document.location.href = "about:blank";

var html = "<html>\n"; html += "<head>\n" html += "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">\n"; html += "<meta name=\"Author\" content=\"Georg-Johann Lay\">\n"; html += "<title>ATMega8 Baudrate, fosc = "+fosc+" MHz</title>\n"; html += "</head>\n" win_ubrr.document.writeln (html);

html = "<body bgcolor=\"white\" text=\"black\">\n"; win_ubrr.document.writeln (html); write_ubrr_table (fosc, baud); html = "</body>\n"; html += "</html>\n"; win_ubrr.document.writeln (html); win_ubrr.document.close(); }

function write_freq_button (frq) { html = "<input type=submit onclick=\"open_ubrr_window("+frq+")\" SIZE=\"120\" VALUE=\" "+frq+" MHz \">";

document.writeln (html); }


</script>

Von „https://rn-wissen.de/wiki/index.php?title=Vorlage:Testvorlage&oldid=3097“

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