singt.vhd

产生正弦波波形的一个顶层文件

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
ENTITY SINGT IS
    PORT ( CLK : IN STD_LOGIC;
          DOUT : OUT STD_LOGIC_VECTOR (7 DOWNTO 0) );
END;
ARCHITECTURE DACC OF SINGT IS
COMPONENT data_rom
     PORT(address : IN STD_LOGIC_VECTOR (5 DOWNTO 0);
        inclock : IN STD_LOGIC;
              q : OUT STD_LOGIC_VECTOR (7 DOWNTO 0) );
END COMPONENT;
    SIGNAL Q1 :STD_LOGIC_VECTOR (5 DOWNTO 0);
BEGIN
PROCESS(CLK)
BEGIN
   IF CLK'EVENT AND CLK = '1' THEN Q1<=Q1+1;
END IF;
END PROCESS;
u1 : data_rom PORT MAP(address=>Q1,q=>DOUT,inclock=>CLK);
END;