viterbi_block.vhd

这是一个计算维特比译码的程序

-- -------------------------------------------------------------
--
-- Module: viterbi_block
-- Simulink Path: hdlcoderviterbi/viterbi_block
-- Created: 2009-03-24 16:24:10
-- Hierarchy Level: 0
--In1  [171 133]
--out1 wait for 33 clk and out at the 34 clk'event
-- -------------------------------------------------------------
LIBRARY IEEE;
USE IEEE.std_logic_1164.ALL;
USE IEEE.numeric_std.ALL;
USE work.viterbi_block_pkg.ALL;

ENTITY viterbi_block IS
  PORT( clk                               :   IN    std_logic;
        reset                             :   IN    std_logic;
        clk_enable                        :   IN    std_logic;
        In1                               :   IN    vector_of_std_logic_vector2(0 TO 1);  --[171 133]
        ce_out                            :   OUT   std_logic;
        Out1                              :   OUT   std_logic
        );
END viterbi_block;


ARCHITECTURE rtl OF viterbi_block IS

  -- Component Declarations
  COMPONENT BMC_Unit
    PORT( clk                             :   IN    std_logic;
          reset                           :   IN    std_logic;
          enb                             :   IN    std_logic;
          In1                             :   IN    vector_of_std_logic_vector2(0 TO 1);  
          Out1                            :   OUT   vector_of_std_logic_vector4(0 TO 3)  
          );
  END COMPONENT;

  COMPONENT ACS_Unit
    PORT( clk                             :   IN    std_logic;
          reset                           :   IN    std_logic;
          enb                             :   IN    std_logic;
          In1                             :   IN    vector_of_std_logic_vector4(0 TO 3);  
          Out1                            :   OUT   std_logic_vector(0 TO 63);  -- boolean [64]
          Out2                            :   OUT   std_logic_vector(7 DOWNTO 0)  
          );
  END COMPONENT;

  COMPONENT Traceback
    PORT( clk                             :   IN    std_logic;
          reset                           :   IN    std_logic;
          enb                             :   IN    std_logic;
          In1                             :   IN    std_logic_vector(0 TO 63);  -- boolean [64]
          In2                             :   IN    std_logic_vector(7 DOWNTO 0);  
          Out1                            :   OUT   std_logic
          );
  END COMPONENT;

  -- Component Configuration Statements
  FOR ALL : BMC_Unit
    USE ENTITY work.BMC_Unit(rtl);

  FOR ALL : ACS_Unit
    USE ENTITY work.ACS_Unit(rtl);

  FOR ALL : Traceback
    USE ENTITY work.Traceback(rtl);

  -- Signals
  SIGNAL enb                              : std_logic;
  SIGNAL BMC_Unit_out1                    : vector_of_std_logic_vector4(0 TO 3);  
  SIGNAL ACS_Unit_out1                    : std_logic_vector(0 TO 63);  -- boolean [64]
  SIGNAL ACS_Unit_acs_out2                : std_logic_vector(7 DOWNTO 0);  
  SIGNAL Traceback_out1                   : std_logic;
  

BEGIN
  u_BMC_Unit : BMC_Unit
    PORT MAP
      (clk => clk,
       reset => reset,
       enb => enb,
       In1 => In1,  
       Out1 => BMC_Unit_out1  
       );

  u_ACS_Unit : ACS_Unit
    PORT MAP
      (clk => clk,
       reset => reset,
       enb => enb,
       In1 => BMC_Unit_out1,  
       Out1 => ACS_Unit_out1,  -- boolean [64]
       Out2 => ACS_Unit_acs_out2  
       );

  u_Traceback : Traceback
    PORT MAP
      (clk => clk,
       reset => reset,
       enb => enb,
       In1 => ACS_Unit_out1,  -- boolean [64]
       In2 => ACS_Unit_acs_out2,  
       Out1 => Traceback_out1
       );
  enb <= clk_enable;

  ce_out <= enb;

  Out1 <= Traceback_out1;

END rtl;