LIBRARY ieee;
USE ieee.std_logic_1164.all;

LIBRARY altera_mf;
USE altera_mf.all;

ENTITY EPCS_CONT IS
    PORT
    (
        addr        : IN STD_LOGIC_VECTOR (23 DOWNTO 0);
        clkin        : IN STD_LOGIC;
        datain        : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
        rden        : IN STD_LOGIC;
        read        : IN STD_LOGIC;
        write        : IN STD_LOGIC;
        busy        : OUT STD_LOGIC;
        data_valid        : OUT STD_LOGIC;
        dataout        : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
        illegal_write        : OUT STD_LOGIC
    );
END EPCS_CONT;


ARCHITECTURE SYN OF epcs_cont IS

    SIGNAL sub_wire0    : STD_LOGIC;
    SIGNAL sub_wire1    : STD_LOGIC;
    SIGNAL sub_wire2    : STD_LOGIC;
    SIGNAL sub_wire3    : STD_LOGIC_VECTOR (7 DOWNTO 0);



    COMPONENT altasmi_parallel
    GENERIC (
        data_width        : STRING;
        epcs_type        : STRING;
        intended_device_family        : STRING;
        lpm_hint        : STRING;
        lpm_type        : STRING;
        page_size        : NATURAL;
        port_bulk_erase        : STRING;
        port_fast_read        : STRING;
        port_illegal_erase        : STRING;
        port_illegal_write        : STRING;
        port_rdid_out        : STRING;
        port_read_address        : STRING;
        port_read_rdid        : STRING;
        port_read_sid        : STRING;
        port_read_status        : STRING;
        port_sector_erase        : STRING;
        port_sector_protect        : STRING;
        port_shift_bytes        : STRING;
        port_wren        : STRING;
        port_write        : STRING;
        use_eab        : STRING
    );
    PORT (
            illegal_write    : OUT STD_LOGIC;
            read    : IN STD_LOGIC;
            addr    : IN STD_LOGIC_VECTOR (23 DOWNTO 0);
            busy    : OUT STD_LOGIC;
            clkin    : IN STD_LOGIC;
            data_valid    : OUT STD_LOGIC;
            datain    : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
            rden    : IN STD_LOGIC;
            write    : IN STD_LOGIC;
            dataout    : OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
    );
    END COMPONENT;

BEGIN
    illegal_write    <= sub_wire0;
    busy    <= sub_wire1;
    data_valid    <= sub_wire2;
    dataout    <= sub_wire3(7 DOWNTO 0);

    ALTASMI_PARALLEL_component : ALTASMI_PARALLEL
    GENERIC MAP (
        data_width => "STANDARD",
        epcs_type => "EPCS16",
        intended_device_family => "Cyclone III",
        lpm_hint => "UNUSED",
        lpm_type => "altasmi_parallel",
        page_size => 256,
        port_bulk_erase => "PORT_UNUSED",
        port_fast_read => "PORT_UNUSED",
        port_illegal_erase => "PORT_UNUSED",
        port_illegal_write => "PORT_USED",
        port_rdid_out => "PORT_UNUSED",
        port_read_address => "PORT_UNUSED",
        port_read_rdid => "PORT_UNUSED",
        port_read_sid => "PORT_UNUSED",
        port_read_status => "PORT_UNUSED",
        port_sector_erase => "PORT_UNUSED",
        port_sector_protect => "PORT_UNUSED",
        port_shift_bytes => "PORT_UNUSED",
        port_wren => "PORT_UNUSED",
        port_write => "PORT_USED",
        use_eab => "ON"
    )
    PORT MAP (
        read => read,
        addr => addr,
        clkin => clkin,
        datain => datain,
        rden => rden,
        write => write,
        illegal_write => sub_wire0,
        busy => sub_wire1,
        data_valid => sub_wire2,
        dataout => sub_wire3
    );

END SYN;

component EPCS_CONT is
    port
    (
        addr        : IN STD_LOGIC_VECTOR (23 DOWNTO 0);
        clkin        : IN STD_LOGIC;
        datain        : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
        rden        : IN STD_LOGIC;
        read        : IN STD_LOGIC;
        shift_bytes        : IN STD_LOGIC;
        write        : IN STD_LOGIC;
        busy        : OUT STD_LOGIC;
        data_valid        : OUT STD_LOGIC;
        dataout        : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
        illegal_write        : OUT STD_LOGIC
    );
end component;

signal addr_sig   : STD_LOGIC_VECTOR (23 DOWNTO 0);
signal datain_sig : STD_LOGIC_VECTOR (7 DOWNTO 0);
signal rden_sig   : STD_LOGIC;
signal read_sig   : STD_LOGIC;
signal shift_bytes_sig : STD_LOGIC;
signal write_sig  : STD_LOGIC;
signal busy_sig   : STD_LOGIC;
signal data_valid_sig : STD_LOGIC;
signal dataout_sig : STD_LOGIC_VECTOR (7 DOWNTO 0);
signal illegal_write_sig : STD_LOGIC;

U_EPCS_CONT : EPCS_CONT port map (
        addr     => addr_sig,
        clkin     => CLK_30MHZ,
        datain     => datain_sig,
        rden     => rden_sig,
        read     => read_sig,
        shift_bytes     => shift_bytes_sig,
        write     => write_sig,
        busy     => busy_sig,
        data_valid     => data_valid_sig,
        dataout     => dataout_sig,
        illegal_write     => illegal_write_sig
    );