Started working on io for control unit

src/control_unit.vhd

@@ -0,0 +1,34 @@
+library IEEE;  
+use IEEE.std_logic_1164.all;
+use IEEE.MATH_REAL.all;
+library work;
+use work.io_types.all;
+
+entity control_unit is
+  
+  port (
+    clk, rst: in std_logic;
+    address_read_in, address_write_in: in control_unit_ext_t.address;
+    address_read_out, address_write_out: in control_unit_ext_t.address);
+    words_to_read_in: in std_logic_vector(control_unit_ext_t.seq_read_count);
+    words_to_write_in: in std_logic_vector(control_unit_ext_t.seq_write_count);  
+  );
+
+end entity control_unit;
+
+architecture behave of control_unit is
+  
+begin
+  
+  main_proc: process(clk)
+  begin
+    if rising_edge(clk) then
+      if rst = '0' then
+        
+      else
+        
+      end if;
+    end if;
+  end process main_proc;
+  
+end architecture behave;

src/io_type_pkg.vhd

@@ -15,6 +15,15 @@ package io_types is
     socbridge: ext_protocol_def_t;
   end record interface_inst_t;
 
+  constant number_of_drivers = 3;
+
+  type control_unit_ext_t is record
+    interface_id_count: in std_logic_vector(number_of_drivers)) downto 0);
+    address: in std_logic_vector(32 downto 0);
+    seq_write_count: in std_logic_vector(7 downto 0);
+    seq_read_count: in std_logic_vector(7 downto 0);
+  end record control_unit_format;
+
   --- PROTOCOL INFORMATION ---
   constant interface_inst : interface_inst_t := (
     socbridge => ("SoCBridge           ", 8, 2, 2)