PoC.bus.stream.Buffer

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This module implements a generic buffer (FIFO) for the PoC.Stream protocol. It is generic in DATA_BITS and in META_BITS as well as in FIFO depths for data and meta information.

Entity Declaration:

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entity stream_Buffer is
  generic (
    FRAMES            : positive                                                := 2;
    DATA_BITS         : positive                                                := 8;
    DATA_FIFO_DEPTH   : positive                                                := 8;
    META_BITS         : T_POSVEC                                                := (0 => 8);
    META_FIFO_DEPTH   : T_POSVEC                                                := (0 => 16)
  );
  port (
    Clock             : in  std_logic;
    Reset             : in  std_logic;
    -- IN Port
    In_Valid          : in  std_logic;
    In_Data           : in  std_logic_vector(DATA_BITS - 1 downto 0);
    In_SOF            : in  std_logic;
    In_EOF            : in  std_logic;
    In_Ack            : out std_logic;
    In_Meta_rst       : out std_logic;
    In_Meta_nxt       : out std_logic_vector(META_BITS'length - 1 downto 0);
    In_Meta_Data      : in  std_logic_vector(isum(META_BITS) - 1 downto 0);
    -- OUT Port
    Out_Valid         : out std_logic;
    Out_Data          : out std_logic_vector(DATA_BITS - 1 downto 0);
    Out_SOF           : out std_logic;
    Out_EOF           : out std_logic;
    Out_Ack           : in  std_logic;
    Out_Meta_rst      : in  std_logic;
    Out_Meta_nxt      : in  std_logic_vector(META_BITS'length - 1 downto 0);
    Out_Meta_Data     : out std_logic_vector(isum(META_BITS) - 1 downto 0)
  );
end entity;