vtu_diag: add comments.

ff26aa4b · Tristan Gingold · 1026f64f · ff26aa4b
Commit ff26aa4b authored Mar 24, 2020 by Tristan Gingold
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vtu_diag.vhd hdl/rtl/vtu_diag.vhd +3 -0

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--- a/hdl/rtl/vtu_diag.vhd
+++ b/hdl/rtl/vtu_diag.vhd
@@ -97,6 +97,7 @@ begin
    report "inaccurate results due to clk frequency"
    severity failure;

+  --  Mesure number of SIG_I pulses during the window.
  p_freq_counter : process (sig_i)
  begin
    if rising_edge(sig_i) then
@@ -111,6 +112,7 @@ begin
    end if;
  end process p_freq_counter;

+  --  Generate the end-of-window pulse at the end of the measure window.
  p_gate_counter : process(clk_i)
  begin
    if rising_edge(clk_i) then
@@ -136,6 +138,7 @@ begin
    end if;
  end process;

+  --  Synchronizer for the end-of-window pulse.
  U_Sync_Gate : entity work.gc_pulse_synchronizer2
    port map (
      clk_in_i  => clk_i,