?? gh_binary2gray.vhd
字號:
-----------------------------------------------------------------------------
-- Filename: gh_binary2gray.vhd
--
-- Description:
-- a binary to gray code converter
--
-- Copyright (c) 2006 by George Huber
-- an OpenCores.org Project
-- free to use, but see documentation for conditions
--
-- Revision History:
-- Revision Date Author Comment
-- -------- ---------- -------- -----------
-- 1.0 12/26/06 G Huber Initial revision
--
-----------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.all;
ENTITY gh_binary2gray IS
GENERIC (size: INTEGER := 8);
PORT(
B : IN STD_LOGIC_VECTOR(size-1 DOWNTO 0); -- binary value in
G : out STD_LOGIC_VECTOR(size-1 DOWNTO 0) -- gray code out
);
END entity;
ARCHITECTURE a OF gh_binary2gray IS
BEGIN
process (B) is
begin
for j in 0 to size-2 loop
G(j) <= B(j) xor B(j+1);
end loop;
G(size-1) <= B(size-1);
end process;
END a;
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