hw/irc_reader.vhd

   1 library ieee;
   2 use ieee.std_logic_1164.all;
   3 use ieee.std_logic_arith.all;
   4 use ieee.std_logic_unsigned.all;
   5 use ieee.numeric_std.all;
   6 use work.lx_rocon_pkg.all;
   7
   8 -- IRC reader module
   9
  10 entity irc_reader is
  11         port
  12         (
  13                 -- Inputs
  14     clk_i               : in std_logic;
  15     reset_i             : in std_logic;
  16     irc_i               : in IRC_INPUT_Type;
  17                 -- State
  18                 reset_index_event_i : in std_logic;
  19                 reset_ab_error_i    : in std_logic;
  20                 -- Outputs
  21     irc_o               : out IRC_OUTPUT_Type
  22   );
  23 end irc_reader;
  24
  25 architecture rtl of irc_reader is
  26
  27         begin
  28
  29         dff_mark: dff2
  30         port map
  31         (
  32                 clk_i   => clk_i,
  33                 reset_i => '0',
  34                 d_i     => irc_i.mark,
  35                 q_o     => irc_o.mark
  36         );
  37
  38         qctr: qcounter
  39         port map
  40         (
  41                 clk_i               => clk_i,
  42                 reset_i             => reset_i,
  43                 a0_i                => irc_i.a,
  44                 b0_i                => irc_i.b,
  45                 index0_i            => irc_i.index,
  46                 reset_index_event_i => reset_index_event_i,
  47                 reset_ab_error_i    => reset_ab_error_i,
  48                 qcount_o            => irc_o.qcount,
  49                 qcount_index_o      => irc_o.index,
  50                 ab_error_o          => irc_o.ab_error,
  51                 ab_event_o          => open,
  52                 index_event_o       => irc_o.index_event,
  53                 a_rise_o            => open,
  54                 a_fall_o            => open,
  55                 b_rise_o            => open,
  56                 b_fall_o            => open
  57         );
  58
  59 end rtl;