usbpkg.vhd

来自「USBHostSlave is a USB 1.1 host and Devic」· VHDL 代码 · 共 50 行

LIBRARY std;
USE std.textio.ALL;
LIBRARY utilities;
  USE utilities.standard_utils.ALL;


PACKAGE usbpkg IS

  constant PTIME: time :=  1 us;  -- packet time
  constant RTIME: time :=  70 ns; -- turn around time

  constant MAXENDPT: natural := 32;  -- maximum # of endpoints

  type ptype is (NONE, POUT, PIN, PACK,ERR);

  type upkt is 
    RECORD 
      id:  ptype;
      dest : integer ;
      data: string(1 to 80);
    END RECORD;


  type upkt_vector is array (natural range <>) of upkt;

  function resolve_upkt (s : upkt_vector) return upkt;

  subtype pkt is resolve_upkt upkt;
   



END usbpkg;



PACKAGE BODY usbpkg IS

  -- dummy function, you need to fix this
  function resolve_upkt (s : upkt_vector) return upkt is

   begin
    return(s(0));

   end resolve_upkt;

end  usbpkg;