Hi Patrice
From the provided implementation, I assume that the buffer is a sequence of 8-bit integers for which we need to compute the checksums. We can use MATLAB to easily accomplish this task using “mod” function (to retain the 8-bit nature of the integers). Below you will find implementation of the same:
function [CK_A, CK_B] = fletcher(Buffer)
CK_A = uint8(0);
CK_B = uint8(0);
N = length(Buffer);
for I = 1:N
% use mod with 2^8 (which is 256)
CK_A = mod(CK_A + uint8(Buffer(I)), 256);
CK_B = mod(CK_B + CK_A, 256);
end
end
% an example of using it
Buffer = [1, 2, 3, 4, 5, 6];
[CK_A, CK_B] = fletcher(Buffer)
To help with understanding the function, you may find the documentation of “mod” below:
Hope it helps you out
larush
