How to write real data type into a file in VHDL?

Question

I have 2 D matrix type in my VHDL code with all elements being "real" type.

Something like this:

type type1 is array (1 to 50,1 to 50) of real;

Now I want to write this whole matrix into a text file.Each row should be written in a line separated by a comma How can I do that?

I looked into the textio package, but not sure how to use them for the real data type.

Is there any custom package for this?

Answer 1

Start using textio

use textio.all;

a couple of useful variables:

    variable s : line;
    file output : text;

the main code goes something like this:

    for y in image1'range(2) loop
      for x in image1'range(1) loop
        write(s,real'image(image1(x,y));
      end loop;
      writeline(output,s);
    end loop;

I'll leave you to add in your comma delimiters and any header/footer you need.