add ringcnt to top_shift

1 files changed, 10 insertions, 3 deletions

diff --git a/src/ringcnt.vhd b/src/ringcnt.vhd
index 5fc0d60..1c46679 100644
--- a/src/ringcnt.vhd
+++ b/src/ringcnt.vhd
@@ -1,11 +1,18 @@
 library ieee;
 use ieee.std_logic_1164.all;
 
-entity ringcnt is 
+entity ringcnt is
+  port (
+    clk  : in std_ulogic;
+    rst_n : in std_ulogic;
+    en_i  : in std_ulogic;
+    y_o   : out std_ulogic_vector(9 downto 0));
 end entity;
 
 architecture rtl of ringcnt is
+  signal rc, rcn : std_ulogic_vector(9 downto 0);
 begin
-
+  rc <= "1000000000" when rst_n = '0' else rcn when rising_edge(clk);
+  rcn <= rc when en_i = '0' else rc(0) & rc(9 downto 1);
+  y_o <= rc;
 end architecture rtl; 
-