registro_pixel.vhd

来自「用VHDL实现视频控制程序,实现对图像的采集和压缩,」· VHDL 代码 · 共 39 行

library IEEE;
use IEEE.std_logic_1164.all;

entity registro_pixel is
    generic ( N:integer:=8 );
    port (
        PIXEL_IN: in STD_LOGIC_VECTOR (N-1 downto 0);
        PIXEL_OUT: out STD_LOGIC_VECTOR (N-1 downto 0);
        Enable: in STD_LOGIC;
        clk: in STD_LOGIC;
        resetz: in STD_LOGIC
    );
end registro_pixel;

architecture registro_pixel_arch of registro_pixel is
signal salida, p_salida: std_logic_vector(N-1 downto 0); 
begin

sinc: process(resetz,clk)
begin
    if(resetz='0')then
      salida<=(OTHERS=>'0');
    elsif(clk'event and clk='1')then
      salida<=p_salida;
    end if;
end process sinc;

PIXEL_OUT<=salida;

registro: process(PIXEL_IN,enable,salida)
begin
    if(enable='1')then
      p_salida<=PIXEL_IN;
    else
      p_salida<=salida;
    end if;
end process registro;  
end registro_pixel_arch;