function out=crc_24(msg)
g0=ones(1,24);
N=length(msg);

g2(1)=xor(msg(1),g0(1));
g0=circshift(g0,[0,-1]);%g0=[1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 ];
g0(1)=xor(g2(1),g0(2));
g0(6)=xor(g2(1),g0(7));
g0(7)=xor(g2(1),g0(8));
g0(10)=xor(g2(1),g0(11));
g0(13)=xor(g2(1),g0(14));
g0(14)=xor(g2(1),g0(15));
g0(17)=xor(g2(1),g0(18));
g0(18)=xor(g2(1),g0(19));
g0(19)=xor(g2(1),g0(20));
g0(20)=xor(g2(1),g0(21));
g0(21)=xor(g2(1),g0(22));
g0(23)=xor(g2(1),g0(24));
g0(24)=g2(1);


if N>1
for i=2:N
    k=g0;
    g2(i)=xor(msg(i),g0(1));
    g0=circshift(g0,[0,-1]);
    
    g0(24)=g2(i);
    g0(23)=xor(g2(i),k(24));
    g0(21)=xor(g2(i),k(22));
    g0(20)=xor(g2(i),k(21));
    g0(19)=xor(g2(i),k(20));
    g0(18)=xor(g2(i),k(19));
    g0(17)=xor(g2(i),k(18));
    g0(14)=xor(g2(i),k(15));
    g0(13)=xor(g2(i),k(14));
    g0(10)=xor(g2(i),k(11));
    g0(7)=xor(g2(i),k(8));
    g0(6)=xor(g2(i),k(7));
    g0(1)=xor(g2(i),k(2));
   
end
end
% out=g0;
out=g0;