LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
ENTITY DDS_VHDL IS                                     -- 頂層設計
    PORT (  CLK : IN  STD_LOGIC;  --系統時鐘
           FWORD : IN  STD_LOGIC_VECTOR(7 DOWNTO 0);  --頻率控制字
           PWORD : IN  STD_LOGIC_VECTOR(7 DOWNTO 0);  --相位控制字
          FOUT  : OUT STD_LOGIC_VECTOR(9 DOWNTO 0);   --可移相正弦信號輸出
          POUT  : OUT STD_LOGIC_VECTOR(9 DOWNTO 0)   ); --參考信號輸出
 END;
ARCHITECTURE one OF DDS_VHDL IS
     COMPONENT REG32B                    --32位鎖存器
        PORT (  LOAD : IN STD_LOGIC;
                 DIN : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
                DOUT : OUT STD_LOGIC_VECTOR(31 DOWNTO 0) );
    END COMPONENT;
     COMPONENT REG10B                   --10位鎖存器
        PORT (  LOAD :  IN STD_LOGIC;
                 DIN :  IN STD_LOGIC_VECTOR(9 DOWNTO 0);
                DOUT : OUT STD_LOGIC_VECTOR(9 DOWNTO 0) );
    END COMPONENT;
    COMPONENT ADDER32B                  --32位加法器
       PORT (  A : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
               B : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
               S : OUT STD_LOGIC_VECTOR(31 DOWNTO 0)     );
    END COMPONENT;
    COMPONENT ADDER10B                   --10位加法器
       PORT (  A : IN  STD_LOGIC_VECTOR(9 DOWNTO 0);
                B : IN  STD_LOGIC_VECTOR(9 DOWNTO 0);
                S : OUT STD_LOGIC_VECTOR(9 DOWNTO 0)     );
    END COMPONENT;
    COMPONENT SIN_ROM                     --10位地址10位數據正弦信號數據ROM
      PORT	( address	: IN STD_LOGIC_VECTOR(9 DOWNTO 0);
		      inclock	: IN STD_LOGIC ;
	            	q	: OUT STD_LOGIC_VECTOR(9 DOWNTO 0)	);
    END COMPONENT; 
     SIGNAL F32B   : STD_LOGIC_VECTOR(31 DOWNTO 0);
     SIGNAL D32B   : STD_LOGIC_VECTOR(31 DOWNTO 0);
     SIGNAL DIN32B : STD_LOGIC_VECTOR(31 DOWNTO 0);
     SIGNAL P10B   : STD_LOGIC_VECTOR( 9 DOWNTO 0);
     SIGNAL LIN10B : STD_LOGIC_VECTOR( 9 DOWNTO 0);
     SIGNAL SIN10B : STD_LOGIC_VECTOR( 9 DOWNTO 0);
 BEGIN 
 F32B(27 DOWNTO 20)<=FWORD ;       F32B(31 DOWNTO 28)<="0000";
 F32B(19 DOWNTO 0)<="00000000000000000000" ;
 P10B( 9 DOWNTO 2)<=PWORD ;       P10B( 1 DOWNTO 0)<="00"  ;
 u1 : ADDER32B  PORT MAP( A=>F32B,B=>D32B, S=>DIN32B );
 u2 :   REG32B  PORT MAP( DOUT=>D32B,DIN=> DIN32B, LOAD=>CLK );
 u3 :  SIN_ROM  PORT MAP( address=>SIN10B, q=>FOUT, clock=>CLK );
 u4 : ADDER10B  PORT MAP( A=>P10B,B=>D32B(31 DOWNTO 22),S=>LIN10B );
 u5 :   REG10B  PORT MAP( DOUT=>SIN10B,DIN=>LIN10B, LOAD=>CLK );
 u6 :  SIN_ROM  PORT MAP( address=>D32B(31 DOWNTO 22), q=>POUT, clock=>CLK );
END;