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    %% Read Digits of Binary Coded Decimal Values   

% Copyright 2015 The MathWorks, Inc.


%% 
% Create a file with binary coded decimal (BCD) values. 
str = ['AB'; 'CD'; 'EF'; 'FA'];

fileID = fopen('bcd.bin','w');
fwrite(fileID,hex2dec(str),'ubit8');
fclose(fileID);  

%% 
% Read 1 byte at a time. 
fileID = fopen('bcd.bin');
onebyte = fread(fileID,4,'*ubit8');  

%% 
% Display the BCD values. 
disp(dec2hex(onebyte))  

%% 
% Return to the beginning of the file using |frewind|. If you read 4 bits
% at a time on a little-endian system, your results appear in the wrong order. 
frewind(fileID)

err = fread(fileID,8,'*ubit4');
disp(dec2hex(err))  

%% 
% Return to the beginning of the file using |frewind|. Read the data 4 bits
% at a time as before, but specify a big-endian ordering to display the
% correct results. 
frewind(fileID)

correct = fread(fileID,8,'*ubit4','ieee-be');
disp(dec2hex(correct))  

%% 
% Close the file. 
fclose(fileID);