How to convert decimal into hexadecimal in "S function" Matlab ?

Hello,

I am using Matlab 2021a. In simulink, I am giving input value ( 2748) and expecting output value in hexadecimal. As we know that simulink is not supporting "character", I am generating output in UINT8. But my requirement is to produce :

Input : UINT16 ( 2748)

output : UINT8

y1[0] = 10 ( decimal conversion of "0A")

y1[2] = 188 ( decimal conversion of "BC")

I have written below code for conversion :

   z[0] = *u0;       // z is a working vector with data type UINT16 and u0 is an input
    z[1] = 16;
    z[2] = fmod(z[0],16); 
    z[3] = (z[0]-z[2])/z[1];
    z[4] = fmod(z[3],z[1]); 
    z[5] = (z[3]- z[4])/ z[1];
    z[6] = fmod (z[5], z[1]);
    z[7] = (z[5]- z[6])/ z[1];
    y1[0]= z[7]; // giving output = 0   // y is output with data type UINT8 
    y1[1]= z[5]; // giving output = 10
    y1[2]= z[4]; // giving output = 11
    y1[3]= z[2]; // giving output = 12

But I need output -

y1[0] = decimal conversion of first two bytes = 00 10 > 10

y1[1] = decimal conversion of first two bytes = 11 12 > 188

I also have attached the simulink block and output. Can I ask for recommendation how can I write code to generate such output ?

Answer 1

[dpb]

>> uint8(hex2dec(reshape(strrep(sprintf('%#X',2748),'X',''),2,[]).'))
ans =
  2×1 uint8 column vector
    10
   188
>> 

[Md Rabiul Islam]

hex2dec or dec2hex is not accepted in "S- function". If I use this function, it shows error.

[dpb]

That's bizarre. Why in the world would that not be acceptable, but I guess it is what it is...one workaround is

>> txt=cellstr(reshape(strrep(sprintf('%#X',2748),'X',''),2,[]).');
>> uint8(cellfun(@(c)sscanf(c,'%x'),txt))
ans =
  2×1 uint8 column vector
    10
   188
>> 

Answer 2

[Jonas]

input = uint16(2748)

input = uint16 2748

output = zeros(2,1,'uint8');
output(1) = bitshift(input,-8);
output(2) = bitand(input,255);
output

output = 2×1

10 188

Hexadecimal is just a way of displaying, not a data type.