mips_sys

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LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.numeric_std.all;
PACKAGE io_switches_pins IS
    TYPE t_io_switches_pins IS
        RECORD
            sw:     std_logic_vector(3 DOWNTO 0);
            east:   std_logic;
            north:  std_logic;
            south:  std_logic;
            west:   std_logic;
            center: std_logic;
            rot_a:  std_logic;
            rot_b:  std_logic;
        END RECORD;
    CONSTANT c_io_switches_pins_default: t_io_switches_pins := (
            sw     => "0000",
            east   => '0',
            north  => '0',
            south  => '0',
            west   => '0',
            center => '0',
            rot_a  => '1',
            rot_b  => '1'
        );
    FUNCTION io_switches_to_slv(switches: t_io_switches_pins)
        RETURN std_logic_vector;
    FUNCTION io_switches_from_slv(slv: std_logic_vector(31 DOWNTO 0))
        RETURN t_io_switches_pins;
END PACKAGE io_switches_pins;
PACKAGE BODY io_switches_pins IS
    FUNCTION io_switches_to_slv(switches: t_io_switches_pins)
        RETURN std_logic_vector IS
        VARIABLE v_slv: std_logic_vector(31 DOWNTO 0);
    BEGIN
        v_slv( 3 DOWNTO  0) := switches.sw;
        v_slv( 7 DOWNTO  4) := (OTHERS => '0');
        v_slv( 8)           := switches.east;
        v_slv( 9)           := switches.north;
        v_slv(10)           := switches.south;
        v_slv(11)           := switches.west;
        v_slv(15 DOWNTO 12) := (OTHERS => '0');
        v_slv(16)           := switches.center;
 
 
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