How to read hexadecimal/bcd format as double floating values?

I have some data stored in BCD format that I want to read directly as a floating-point value. How can I achieve this?

Answer 1

[MathWorks Support Team]

To achieve this, please follow the steps below:

1) Create a file with 'FF' written in BCD format:

str = ['FF'];
fileID = fopen('bcd.bin','w');
fwrite(fileID,hex2dec(str),'ubit16');
fclose(fileID);

2) First open the file and then read the data from that file:

fileID = fopen('bcd.bin');
onebyte = fread(fileID,1,'*ubit16')

3) You will see that "onebyte" is a variable of type "uint16" with a value of 255. To turn this into a MATLAB double, we can use the "double" function:

sol = double(onebyte) % this is 255.