bintogra.vhd

来自「VHDL子程序集,包括各种例程资料以及源码.」· VHDL 代码 · 共 31 行

--**********************************
--*   Binary To Gray Code Convert  *
--*      Component (GENERIC)       *
--*       Filename : BINTOGRA      *
--**********************************

library IEEE;
use IEEE.std_logic_1164.all;

entity BINTOGRA is
    generic (number: integer range 0 to 31 := 2); 
    port (
          B: in STD_LOGIC_VECTOR (0 to number - 1);
          G: out STD_LOGIC_VECTOR (0 to number - 1)
         );
end BINTOGRA;

architecture BINTOGRA_arch of BINTOGRA is

begin
process (B)

begin
    for i in 0 to number - 2 loop
        G(i) <= B(i+1) xor B(i);
    end loop;    
    G(number -1) <= B(number - 1);   
end process;     

end BINTOGRA_arch;