seg4_7.vhd

来自「1．6个数码管动态扫描显示驱动 2．按键模式选择(时分秒)与调整控制 3．用」· VHDL 代码 · 共 28 行

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;

ENTITY seg4_7 IS
PORT(data:IN STD_LOGIC_VECTOR(3 DOWNTO 0);
     q:OUT STD_LOGIC_VECTOR(6 DOWNTO 0));
END seg4_7;

ARCHITECTURE arc OF seg4_7 IS
BEGIN
  PROCESS(data)
  BEGIN
    CASE data IS
    WHEN "0000"=>q<="1111110";
    WHEN "0001"=>q<="0110000";
    WHEN "0010"=>q<="1101101";
    WHEN "0011"=>q<="1111001";
    WHEN "0100"=>q<="0110011";
    WHEN "0101"=>q<="1011011";
    WHEN "0110"=>q<="1011111";
    WHEN "0111"=>q<="1110000";
    WHEN "1000"=>q<="1111111";
    WHEN "1001"=>q<="1111011";
    WHEN OTHERS =>q<="0000000";
    END CASE;
  END PROCESS;
END arc;