top_shift: add edge.vhd and ringcnt.vhd as empty modules

1 files changed, 16 insertions, 5 deletions

diff --git a/src/t_top_shift.vhd b/src/t_top_shift.vhd
index 996b6d1..ddf76a1 100644
--- a/src/t_top_shift.vhd
+++ b/src/t_top_shift.vhd
@@ -37,10 +37,21 @@ begin
   sim_rst_n <= '0', '1' after 55 ns;
 
   -- Stimuli key push
-  sim_x <= '0', '1' after 135 ns, '0' after 195 ns;
-
-  -- Simulation stopper
-  simstop <= true after 300 ns;
+  stim_p : process
+  begin
+    sim_x <= '0';
+    wait until rising_edge(sim_rst_n);
+    for i in 0 to 5 loop
+      wait until falling_edge(sim_clk);
+    end loop;
+    sim_x <= '1';
+    wait until falling_edge(sim_clk);
+    wait until falling_edge(sim_clk);
+    sim_x <= '0';
+    wait for 200 ns;
+    simstop <= true;
+    wait;
+  end process ;
 
   -- Device under test instantiation
   dut : entity work.top_shift
@@ -57,7 +68,7 @@ begin
   sim_key(0) <= sim_rst_n;
   sim_key(1) <= sim_x;
   sim_key(3 downto 2) <= "00";
-  sim_sw <= "1010000101";
+  sim_sw <= "1010000001";
 
   -- Check the expansion port y output
   sim_y <= sim_exp(3);