Subversion Repositories epc_rfid_transponder

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--     Politecnico di Torino                                              

--     Dipartimento di Automatica e Informatica       

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--

--     File name      : tag.vhd 

--

--     Description    : top level of the whole architecture

--

--     Author         : Erwing R. Sanchez Sanchez <erwing.sanchezsanchez@polito.it>

-- 

--     Last change    : 20 July 06 - Erwing Sanchez          

--            

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library IEEE;

use IEEE.std_logic_1164.all;

library WORK;

use WORK.epc_tag.all;

entity EPCTAG is

  generic (

    LOG2_10_TARI_CK_CYC        : integer := 9;  -- Log2(clock cycles for 10 maximum TARI value) (def: Log2(490) = 9 @TCk=520ns)

    DELIMITIER_TIME_CK_CYC_MIN : integer := 22;  -- Min Clock cycles for 12,5 us delimitier

    DELIMITIER_TIME_CK_CYC_MAX : integer := 24;  -- Max Clock cycles for 12,5 us delimitier

    WordsRSV                   : integer := 8;

    WordsEPC                   : integer := 16;

    WordsTID                   : integer := 8;

    WordsUSR                   : integer := 256;

    AddrRSV                    : integer := 2;  -- 1/2 memory address pins

    AddrEPC                    : integer := 3;  -- 1/2 memory address pins

    AddrTID                    : integer := 2;  -- 1/2 memory address pins  

    AddrUSR                    : integer := 5;  -- 1/2 memory address pins (maximum)

    Data                       : integer := 16);  -- memory data width

  port (

    clk       : in  std_logic;

    rst_n     : in  std_logic;

    tdi       : in  std_logic;

    tdo       : out std_logic;

    Data_r    : out std_logic_vector(31 downto 0);

    CRC_r     : out std_logic_vector(15 downto 0);

    Pointer_r : out std_logic_vector(15 downto 0);

    RN16_r    : out std_logic_vector(15 downto 0);

    Length_r  : out std_logic_vector(7 downto 0);

    Mask_r    : out std_logic_vector(MASKLENGTH-1 downto 0);

    trm_cmd   : out std_logic_vector(2 downto 0);

    trm_buf   : out std_logic_vector(15 downto 0));

end EPCTAG;

architecture STRUCTURAL of EPCTAG is

  component receiver

    generic (

      LOG2_10_TARI_CK_CYC        : integer;

      DELIMITIER_TIME_CK_CYC_MIN : integer;

      DELIMITIER_TIME_CK_CYC_MAX : integer);

    port (

      clk       : in  std_logic;

      rst_n     : in  std_logic;

      tdi       : in  std_logic;

      en        : in  std_logic;

      CommDone  : out CommandInternalCode_t;

      Data_r    : out std_logic_vector(31 downto 0);

      CRC_r     : out std_logic_vector(15 downto 0);

      Pointer_r : out std_logic_vector(15 downto 0);

      RN16_r    : out std_logic_vector(15 downto 0);

      Length_r  : out std_logic_vector(7 downto 0);

      Mask_r    : out std_logic_vector(MASKLENGTH-1 downto 0));

  end component;

  component TagCtrl

    generic (

      WordsRSV : integer;

      WordsEPC : integer;

      WordsTID : integer;

      WordsUSR : integer;

      AddrRSV  : integer;

      AddrEPC  : integer;

      AddrTID  : integer;

      AddrUSR  : integer;

      Data     : integer);

    port (

      clk       : in  std_logic;

      rst_n     : in  std_logic;

      CommDone  : in  CommandInternalCode_t;

      Data_r    : in  std_logic_vector(31 downto 0);

      Pointer_r : in  std_logic_vector(15 downto 0);

      RN16_r    : in  std_logic_vector(15 downto 0);

      Length_r  : in  std_logic_vector(7 downto 0);

      Mask_r    : in  std_logic_vector(MASKLENGTH-1 downto 0);

      trm_cmd   : out std_logic_vector(2 downto 0);

      trm_buf   : out std_logic_vector(15 downto 0));

  end component;

  component transmitter

    port (

      clk     : in  std_logic;

      rst_n   : in  std_logic;

      trm_cmd : in  std_logic_vector(2 downto 0);

      trm_buf : in  std_logic_vector(15 downto 0);

      tdo     : out std_logic);

  end component;

  signal Data_ri    : std_logic_vector(31 downto 0);

  signal CRC_ri     : std_logic_vector(15 downto 0);

  signal Pointer_ri : std_logic_vector(15 downto 0);

  signal RN16_ri    : std_logic_vector(15 downto 0);

  signal Length_ri  : std_logic_vector(7 downto 0);

  signal Mask_ri    : std_logic_vector(MASKLENGTH-1 downto 0);

  signal rec_en    : std_logic;

  signal CommDone  : CommandInternalCode_t;

  signal trm_cmd_i : std_logic_vector(2 downto 0);

  signal trm_buf_i : std_logic_vector(15 downto 0);

begin

-- Enabling signals 

  rec_en <= '1';

-- Output signals

   Data_r    <= Data_ri;

  CRC_r     <= CRC_ri;

  Pointer_r <= Pointer_ri;

  RN16_r    <= RN16_ri;

  Length_r  <= Length_ri;

  Mask_r    <= Mask_ri;

  trm_cmd   <= trm_cmd_i;

  trm_buf   <= trm_buf_i;

  receiver_i : receiver

    generic map (

      LOG2_10_TARI_CK_CYC        => LOG2_10_TARI_CK_CYC,

      DELIMITIER_TIME_CK_CYC_MIN => DELIMITIER_TIME_CK_CYC_MIN,

      DELIMITIER_TIME_CK_CYC_MAX => DELIMITIER_TIME_CK_CYC_MAX)

    port map (

      clk       => clk,

      rst_n     => rst_n,

      tdi       => tdi,

      en        => rec_en,

      CommDone  => CommDone,

      Data_r    => Data_ri,

      CRC_r     => CRC_ri,

      Pointer_r => Pointer_ri,

      RN16_r    => RN16_ri,

      Length_r  => Length_ri,

      Mask_r    => Mask_ri);

  TagCtrl_i : TagCtrl

    generic map (

      WordsRSV => WordsRSV,

      WordsEPC => WordsEPC,

      WordsTID => WordsTID,

      WordsUSR => WordsUSR,

      AddrRSV  => AddrRSV,

      AddrEPC  => AddrEPC,

      AddrTID  => AddrTID,

      AddrUSR  => AddrUSR,

      Data     => Data)

    port map (

      clk       => clk,

      rst_n     => rst_n,

      CommDone  => CommDone,

      Data_r    => Data_ri,

      Pointer_r => Pointer_ri,

      RN16_r    => RN16_ri,

      Length_r  => Length_ri,

      Mask_r    => Mask_ri,

      trm_cmd   => trm_cmd_i,

      trm_buf   => trm_buf_i);

  transmitter_i: transmitter

    port map (

      clk     => clk,

      rst_n   => rst_n,

      trm_cmd => trm_cmd_i,

      trm_buf => trm_buf_i,

      tdo     => tdo);

end STRUCTURAL;