how can i show figure in my m-file?

Hi Im going to execute these codes in matlab in order tc generate hdl code

 :function [iport,tnext] = ADD_TESTER (oport, tnow, portinfo)
persistent ud;      %Create a struct to store persistent user data
 tnext = [];           %initialize tnext to null
iport = struct();     %initialize iport to null
if(nargin ==3)       %First call has 3 arguments
    ud.call_count = 0;  %Initialize call counter
    tnext = tnow+100e-9;%Next invocation after 100 ns
    iport.a = '0';
    iport.b = '0';
    iport.cin = '0';
else
    ud.call_count = ud.call_count + 1;
    if ud.call_count < 8             %run for 8 cycles
      tnext = tnow+100e-9;           %Next invocation after 100 ns
      bin = dec2bin(ud.call_count,3);%Convert counter to binary string
      iport.a = bin(1);       %Assign bits of bin to 3 inputs
      iport.b = bin(2);
      iport.cin = bin(3);
    else
        disp('Over');  %If 8 cycles are over, don’t invoke with tnext
    end
end

AND THE ERROR IS:Error in ADD_TESTER (line 15)

    ud.call_count = ud.call_count + 1;

>> ADD_TESTER
15      ud.call_count = ud.call_count + 1;
K>>

PLZ HELP ME THANK YOU SO MUCH!

[Walter Roberson]

What error message is given?

[shide agani]

Error in ADD_TESTER (line 15)

    ud.call_count = ud.call_count + 1;
>> ADD_TESTER
15      ud.call_count = ud.call_count + 1;
K>>

Answer 1

[Tim McBrayer]

The MATLAB HDL Coder demos are an excellent way to learn how to generate HDL code from MATLAB. They are probably the best place to start to get the answers to your questions.

I'm not sure what you are trying to model here. For HDL Coder to generate code from MATLAB, you need a design and a testbench. You do not need to model time. You cannot use MATLAB functions like 'disp' that have no hardware equivalent.

I suggest you determine what hardware you wish to build and write a MATLAB function that implements that function. If you wish to build a counter, build a function that increments its output value each time it is called. Then, implement a testbench that exercises the model by calling it in a loop, providing any inputs that are necessary. Once this simulates correctly, then you can try the code in HDL Coder.