bitstring_reverse_2_hex.m

%
% bit string(in decimal number) --> reverse --> hex
%
function out = bitstring_reverse_2_hex(bitstring)
    bs = bitstring;      % bs for bitstring
    bs = (flipud(bs'))'; % transpose -> flip upside down -> transpose
    bs = char(bs + 48);  % text 0 in ASCII code is 48
    bs_hex = char();
    % 
    for i = 0 : 15
        bs_hex = strcat(bs_hex, dec2hex(bin2dec(bs(i*4 + 1 : (i+1)*4)), 1));
    end
    % output 16-bit string, test through bitstring_reverse_2_hex(zeros(1, 64))
    out = bs_hex;
return