DDS.VHD
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
ENTITY DDS IS
PORT(K:IN STD_LOGIC_VECTOR(9 DOWNTO 0);
EN:IN STD_LOGIC;
RESET:IN STD_LOGIC;
CLK:IN STD_LOGIC;
Q:OUT STD_LOGIC_VECTOR(8 DOWNTO 0));
END ENTITY DDS;
ARCHITECTURE ART OF DDS IS
COMPONENT SUM99 IS
PORT(K:IN STD_LOGIC_VECTOR(9 DOWNTO 0);
EN:IN STD_LOGIC;
RESET:IN STD_LOGIC;
CLK:IN STD_LOGIC;
OUT1:OUT STD_LOGIC_VECTOR(9 DOWNTO 0));
END COMPONENT SUM99;
COMPONENT REG1 IS
PORT(D:IN STD_LOGIC_VECTOR(9 DOWNTO 0);
CLK:IN STD_LOGIC;
Q:OUT STD_LOGIC_VECTOR(9 DOWNTO 0));
END COMPONENT REG1;
COMPONENT ROM IS
PORT(CLK:IN STD_LOGIC;
ADDR:IN STD_LOGIC_VECTOR(9 DOWNTO 0);
OUTP:OUT STD_LOGIC_VECTOR(8 DOWNTO 0));
END COMPONENT ROM;
COMPONENT REG2 IS
PORT(D:IN STD_LOGIC_VECTOR(8 DOWNTO 0);
CLK:IN STD_LOGIC;
Q:OUT STD_LOGIC_VECTOR(8 DOWNTO 0));
END COMPONENT REG2;
SIGNAL S1:STD_LOGIC_VECTOR(9 DOWNTO 0);
SIGNAL S2:STD_LOGIC_VECTOR(9 DOWNTO 0);
SIGNAL S3:STD_LOGIC_VECTOR(8 DOWNTO 0);
BEGIN
U0:SUM99 PORT MAP(K=>K, EN=>EN, RESET=>RESET, CLK=>CLK, OUT1=>S1);
U1:REG1 PORT MAP(D=>S1, CLK=>CLK, Q=>S2);
U2:ROM PORT MAP(ADDR=>S2, CLK=>CLK, OUTP=>S3);
U3:REG2 PORT MAP(D=>S3, CLK=>CLK, Q=>Q);
END ARCHITECTURE ART;
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