mux_generic.ent

来自「6端口寄存器IP内核VHDL源代码」· ENT 代码 · 共 28 行

-- +-----------------------------+
-- |    Library:  multiplexer    |
-- |    designer : Tim Pagden    |
-- |     opened:  7 Jul 1998     |
-- +-----------------------------+
 
-- Function: N-bit M-to-1 multiplexer
 
library ieee;
library vfp;
  use ieee.std_logic_1164.all;
  use vfp.integer_class.all;
  use vfp.hardware_specifications.all;

entity mux_generic is
generic (                        
  data_width : integer := 1;    -- N-bit data
  funnel_factor : integer := 2  -- M to 1, thus f_f = M
);
port (
  -- a   : in  std_ulogic_vector((data_width * funnel_factor)-1 downto 0);
  a   : in  std_ulogic_2D_array(0 to (funnel_factor-1), data_width-1 downto 0);
  sel : in  std_ulogic_vector(log_2(funnel_factor)-1 downto 0);
  -- actually, just std_ulogic_vector; would do the trick
  y   : out std_ulogic_vector(data_width-1 downto 0)
);
end mux_generic;