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_index_event2_i : in std_logic;
  20                 reset_ab_error_i     : in std_logic;
  21                 -- Outputs
  22     irc_o                : out IRC_OUTPUT_Type
  23   );
  24 end irc_reader;
  25
  26 architecture rtl of irc_reader is
  27         begin
  28
  29 dff_mark: dff3
  30         port map
  31         (
  32                 clk_i   => clk_i,
  33                 d_i     => irc_i.mark,
  34                 q_o     => irc_o.state.mark
  35         );
  36
  37 qctr: qcounter
  38         port map
  39         (
  40                 clk_i                => clk_i,
  41                 reset_i              => reset_i,
  42                 a0_i                 => irc_i.a,
  43                 b0_i                 => irc_i.b,
  44                 index0_i             => irc_i.index,
  45                 reset_index_event_i  => reset_index_event_i,
  46                 reset_index_event2_i => reset_index_event2_i,
  47                 reset_ab_error_i     => reset_ab_error_i,
  48                 qcount_o             => irc_o.count.qcount,
  49                 qcount_index_o       => irc_o.count.index,
  50                 ab_error_o           => irc_o.state.ab_error,
  51                 ab_event_o           => open,
  52                 index_o              => irc_o.state.index,
  53                 index_event_o        => irc_o.count.index_event,
  54                 index_event2_o       => irc_o.state.index_event,
  55                 a_rise_o             => open,
  56                 a_fall_o             => open,
  57                 b_rise_o             => open,
  58                 b_fall_o             => open
  59         );
  60
  61 end rtl;