Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Inout questions in testbench

Hi to all :) after doing a certain number of exercizes, about a PWM and an Encoder, I'm doing the first example of a simple PLD. In this example, I use two bus from a DSP: an address bus, and a da...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Does the top level not output some form of direction signal? like a write-enable or read enable?

if it does, then the testbench process can just do this: 


dato_PWM : process(read_en)
begin
  if read_en = '1' then
    tdat_dsp <= "00000000000000000000001110000100";
  else
    --UUT is trying to write data to testbench
    tdata_dsp <= (others => 'Z');
  end if;
end process;