# Trigonometric Function FPGA Implementation using CORDIC Algorithm

### Atsushi Matsumoto (view profile)

Trigonometric function using CORDIC algorithm is implemented to FPGA.

```function s=example_sel2html(fn)
%Convert Dick Benson's example_sel text files to HTML documents
echo off
if nargin < 1
fn = 'example_sel.txt';
end

ln = [];
for n = 1:length(f)
[st1,fn1,tk1] = regexp(f{n},'^([^\\$]*)');
[st2,fn2,tk2] = regexp(f{n},'\\$(.*)\$');
% Blank line.  Also, ignore initialization lines (#)
if isempty(tk1) | (strncmp(f{n},'#',1) & length(f{n})>1)
ln(n).text = '';
ln(n).code = '';
ln(n).style = '';
else
ln(n).text = deblank(f{n}(tk1{1}(1):tk1{1}(2)));
ln(n).text = strrep(ln(n).text,'>','&gt;');
ln(n).text = strrep(ln(n).text,'<','&lt;');

% Determine the indent depending on how many spaces there are
[st,fn] = regexp(ln(n).text,'^([\s]*)');
if isempty(fn)
ln(n).style = 'level1';
elseif fn<=4
ln(n).style = 'level2"';
else
ln(n).style = 'level3"';
end

if ~isempty(tk2)
ln(n).code = f{n}(tk2{1}(1):tk2{1}(2));
else
ln(n).code = '';
end

end

%Look for initialization commands:  Line starts with #
if strncmp(f{n},'#',1) & length(f{n})>1
evalin('base',f{n}(2:end),'disp([''fail to execute string: '',f{n}(2:end)])');
disp('Evaluating Initialization commands');
end

end

s{1} = '<html><body>';
s{end+1} = '<style>';
s{end+1} = '.level1 {font-family:"lr SVbN", verdana, arial, sans-serif;';
s{end+1} = '    font-weight:bold;';
s{end+1} = '    background:#EEE;';
s{end+1} = '    font-size:16pt;';
s{end+1} = '}';
s{end+1} = '.level2 {font-family:"lr SVbN", verdana, arial, sans-serif;';
s{end+1} = '    text-indent:1em;';
s{end+1} = '    font-size:14pt;';
s{end+1} = '}';
s{end+1} = '.level3 {font-family:"lr SVbN", verdana, arial, sans-serif;';
s{end+1} = '    text-indent:2em;';
s{end+1} = '    font-size:12pt;';
s{end+1} = '}';
s{end+1} = '</style>';

for n = 1:length(ln)
if isempty(ln(n).code)
if isempty(ln(n).text)
% No text, no code
s{end+1} = '<br/>';
else
% Text, no code
s{end+1} = sprintf('<div class="%s">%s</div>', ...
ln(n).style,ln(n).text);
end
else
% Text and code
s{end+1} = sprintf('<div class="%s"><a href="matlab:%s">%s</a></div>', ...
ln(n).style,ln(n).code,ln(n).text);
end
end
%s{end+1} = '<imagedata src="../flow.jpg">'
%s{end+1} = '<img border=0 width=200 height=59 src="demo/cordic/flow.jpg" >';

s{end+1} = '</body></html>';

web(['text://' s{:}]);

```