HDL Coder. Undefined function or variable '***'. The first assignment to a local variable determines its class.

Hi guys,

I've written a Matlab function which works fine. Now I'm trying to covert it to Verilog using HDL Coder, but I've found lots of errors, like:

Undefined function or variable 'kernel'. The first assignment to a local variable determines its class.

How can I solve it?

Thanks in advance!

My function is:

function out = convolve3(in, kernel, P, S);

[kRows, kCols]=size(kernel);
[rows, cols] = size (in);
oRows = (rows-kRows+2*P)/S+1;
oCols = (cols-kCols+2*P)/S+1;

kCenterX = floor(kCols / 2);
kCenterY = floor(kRows / 2);

out = zeros(oRows,oCols);

for i= 1 : 1 : oRows

      for j= 1 : 1 : oCols

          for m= 1 : (kRows)
              mm = kRows +1- m;

              for n= 1 : (kCols)
                  nn = kCols +1- n;
                  ii = (i-1)*S+1 + (m - kCenterY)-P;
                  jj = (j-1)*S+1 + (n - kCenterX)-P;

                  if( ii > 0 && ii <= rows && jj > 0 && jj <= cols )
                      out(i,j) = out(i,j) + in(ii,jj) * kernel(mm,nn);
                  end
              end
          end
      end
  end
  end

Answer 1

[Kiruthika Balakrishnan]

I am also getting same error .Did you cleared error?

Thanks in advance

Answer 2

[Kiran Kintali]

Hi Salvador, Can you share a testbench file for this design? Test bench determines the compute the input types used to compile the design and in addition validation of the generated code.