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% Purpose: MATLAB script to produce contents of a ROM that stores
% one cycle of sinewave
% Inputs: None
% Outputs: rom_data.mif file
% Author: Peter Cheung
% Version: 1.0
% Date: 20 Nov 2011
DEPTH = 1024; % Size of ROM
WIDTH = 10; % Size of data in bits
OUTMAX = 2^WIDTH - 1; % Amplitude of sinewave
filename = 'rom_data.mif';
fid = fopen(filename,'w');
fprintf(fid,'-- ROM Initialization file\n');
fprintf(fid,'WIDTH = %d;\n',WIDTH);
fprintf(fid,'DEPTH = %d;\n',DEPTH);
fprintf(fid,'ADDRESS_RADIX = HEX;\n');
fprintf(fid,'DATA_RADIX = HEX;\n');
fprintf(fid,'CONTENT\nBEGIN\n');
for address = 0:1023
angle = (address*2*pi)/DEPTH;
sine_value = sin(angle);
data = (sine_value*0.5*OUTMAX) + OUTMAX*0.5;
fprintf(fid,'%4X : %4X;\n',address,int16(data));
end
fprintf(fid,'END\n');
fclose(fid);
disp('Finished');
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