how can I pack the data in simulink without Vehicle Toolbox?

how can I pack the data in simulink without Vehicle Toolbox?

Answer 1

[Adel Fernandez]

data = zeros(1,8);
data = can_pack(data, hex2dec('FA0') ,8,12);
data = can_pack(data, hex2dec('C0BC4') ,22,20);
data = can_pack(data, hex2dec('2') ,45,2);
dec2hex(data)


function data = can_pack(data,value,start,len)
    
    masks = [1,3,7,15,31,63,127,255];
    
    while len > 0        
        %% compute local variables in current iteration 
        byte_index = floor(start/8)+1;          % get byte inside payload     
        bits_to_shift = mod(start,8);           % get start bit inside byte        
        
        % get bits quantity to put inside a byte
        bits_packed = (8-bits_to_shift); 
        if bits_packed > len
            bits_packed = len;            
        end 
                
        mask = masks(bits_packed);              % get the mask to use, alternatives bitshift(1,bits_packed)-1 or 2^bits_packed-1
                
        %% update message payload 
        % bit operation    data[i] = data[i] | ( (value & mask) << bits)
        data(byte_index) = bitor(data(byte_index),bitshift( bitand(mask,value),bits_to_shift));
                
        %% update input parameters to next iteration 
        start = start + bits_packed;            % update start bit to continue processing 
        value = bitshift(value,-bits_packed);   % update value to continue processing              
        len = len - bits_packed;                % update the length to continue processing
        
    end
end