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1 files changed, 19 insertions, 0 deletions

diff --git a/computer-organization-experiment/counter_4.vhdl b/computer-organization-experiment/counter_4.vhdl
new file mode 100644
index 0000000..23c1807
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+++ b/computer-organization-experiment/counter_4.vhdl
@@ -0,0 +1,19 @@
+LIBRARY IEEE;
+USE IEEE.STD_LOGIC_1164.ALL;
+USE IEEE.STD_LOGIC_UNSIGNED.ALL;
+
+ENTITY counter_4 IS
+  PORT (CLK:IN STD_LOGIC;
+    CQ:OUT STD_LOGIC_VECTOR(3 DOWNTO 0));
+END counter_4;
+ARCHITECTURE behavior OF counter_4 IS
+BEGIN
+  PROCESS(CLK)
+    VARIABLE CQI:STD_LOGIC_VECTOR(3 DOWNTO 0) := B"0000";
+  BEGIN
+    IF CLK'EVENT AND CLK='1' THEN
+      CQI := CQI + 1;
+    END IF;
+    CQ<=CQI;
+  END PROCESS;
+END behavior;