regs_pkg.vhd

4位MCU AM2901的完整VHDL程序

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

package regs_pkg is
      component rdff1 port(
         clk,reset:in std_logic;
         d:        in std_logic;
         q:        buffer std_logic);
      end component;

      component rdff 
         generic (size:integer :=2);
         port(clk,reset:in std_logic;
         d:             in std_logic_vector(size-1 downto 0);
         q:             buffer std_logic_vector(size-1 downto 0));
      end component;

      component rreg1 port(
         clk,reset,load:in std_logic;
         d:             in std_logic;
         q:             buffer std_logic);
      end component;

      component reg
         generic(size:integer:=2);
         port(clk,load:in std_logic;
              rst,pst: in std_logic;
              d:       in std_logic_vector(size-1 downto 0);
              q:       buffer std_logic_vector(size-1 downto 0));
      end component;

      component ureg
         generic(size:integer:=2);
         port(clk,reset,load:in std_logic;
         d:                  in unsigned(size-1 downto 0);
         q:                  buffer unsigned(size-1 downto 0));
      end component;
end regs_pkg;