how to generate null pointer check in simulink model

i'm converting C code into Matlab simulink model. How can I implement NULL pointer check in simulink model and generate codes that does NULL pointer test?

How to generate this if(var1 != NULL_PTR) in simulink model and generate code similarly from model.

void sample(uint8 *var1) 
{ 
  if(var1 != NULL_PTR)
  { 
    /* Do Something */
  } 
}

Answer 1

[Anshuman]

Hi Jeevan,

You can use a MATLAB Function block in Simulink to implement the logic of your C function. This block allows you to write MATLAB code that can be converted into C/C++ code using Simulink Coder. Inside the MATLAB Function block, you can implement the logic for checking the NULL pointer. In MATLAB, this can be done using conditions that mimic the logic you want in C. Here's an example of MATLAB function code:

function y = sample(var1)
%#codegen
% This function mimics the C function with a NULL pointer check.

% Define NULL_PTR as an empty array or a specific value if needed
NULL_PTR = [];

if ~isempty(var1) % MATLAB equivalent of checking for NULL
    % Do something
else
    y = 0; % Handle the NULL case
end

Now you can use Simulink Coder to generate code from your model. The generated code should include the conditional check that you implemented in the MATLAB Function block.

Hope it helps!