CMX_SumET_Topo_Encoder.vhd

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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

library work;
use work.CMXpackage.all;
use work.CMX_flavor_package.all;


-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
use IEEE.NUMERIC_STD.ALL;

-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity CMX_SumET_Topo_Encoder is
  port (
    
    local_data : in std_logic_vector(4*26-1 downto 0);
    
    -- this instructs the modules downstream to plug in the alignment word.
    send_align_out : out std_logic_vector(num_GTX_groups*num_GTX_per_group - 1 downto 0);
    
    Data_out :    out std_logic_vector(TX_indata_length - 1 downto 0);
    bcid_in : in std_logic_vector(11 downto 0);
    bcid_adj : out std_logic_vector(11 downto 0);
    
    clk      :in std_logic);
end CMX_SumET_Topo_Encoder;

architecture Behavioral of CMX_SumET_Topo_Encoder is

  signal sumET_res : std_logic_vector(14 downto 0);
  signal sumET_res_ov : std_logic;
  signal sumX_res : std_logic_vector(14 downto 0);
  signal sumX_res_ov : std_logic;
  signal sumY_res : std_logic_vector(14 downto 0);
  signal sumY_res_ov : std_logic;

  signal sumET : std_logic_vector(14 downto 0);
  signal sumET_ov : std_logic;
  signal sumX : std_logic_vector(14 downto 0);
  signal sumX_ov : std_logic;
  signal sumY : std_logic_vector(14 downto 0);
  signal sumY_ov : std_logic;
  
  signal non_empty_row : std_logic_vector(127 downto 0);

  signal descrambled_local_data : std_logic_vector(95 downto 0);
  
begin

  --adjust the bcid for the latency of calculating the local data
  process(clk)
  begin
    if rising_edge(clk) then
      bcid_adj<=bcid_in;
    end if;
  end process;
  
  descrambled_local_data<=crate_cable_in(local_data);
  
  sumX<=descrambled_local_data(14 downto 0);
  sumX_ov<=descrambled_local_data(90);
  sumY<=descrambled_local_data(29 downto 15);
  sumY_ov<=descrambled_local_data(91);
  sumET<=descrambled_local_data(44 downto 30);
  sumET_ov<=descrambled_local_data(92);
  
  sumX_res<=descrambled_local_data(59 downto 45);
  sumX_res_ov<=descrambled_local_data(93);
  sumY_res<=descrambled_local_data(74 downto 60);
  sumY_res_ov<=descrambled_local_data(94);
  sumET_res<=descrambled_local_data(89 downto 75);
  sumET_res_ov<=descrambled_local_data(95);


  non_empty_row(127)<=sumET_res_ov;
  non_empty_row(126 downto 112)<=sumET_res;
  non_empty_row(111)<=sumET_ov;
  non_empty_row(110 downto 96)<=sumET;
  
  non_empty_row(95)<=sumY_res_ov;
  non_empty_row(94 downto 80)<=sumY_res;
  non_empty_row(79)<=sumY_ov;
  non_empty_row(78 downto 72)<=sumY(14 downto 8);
  non_empty_row(71 downto 52)<=(others=>'0');
  non_empty_row(51 downto 44)<=sumY(7 downto 0);
  non_empty_row(43)<=sumX_res_ov;
  non_empty_row(42 downto 28)<=sumX_res;
  non_empty_row(27)<=sumX_ov;
  non_empty_row(26 downto 12)<=sumX;
  non_empty_row(11 downto 0)<=(others=>'0');

  gen_all_Topo_data: for i_fiber in (num_GTX_groups * num_GTX_per_group)-1 downto 0 generate
    
    non_empty: if i_fiber=5 or i_fiber=7 or i_fiber=9 or i_fiber=11 generate
      Data_out(128*(fiber_to_gtx(i_fiber)+1)-1 downto 128*fiber_to_gtx(i_fiber))<=non_empty_row;
    end generate non_empty;

    empty: if i_fiber/=5 and i_fiber/=7 and i_fiber/=9 and i_fiber/=11 generate
      Data_out(128*(fiber_to_gtx(i_fiber)+1)-1 downto 128*fiber_to_gtx(i_fiber))<=(others=>'0');
    end generate empty;

  end generate gen_all_Topo_data;

  send_align_out<=(others=>'1');
      
end Behavioral;