---- sc_corproc.vhd---- Calculates Sine and Cosine values---- uses: p2r_codic.vhd and p2r_cordicpipe.vhd----	-90DEG TO +90DEG--根據(jù)三角函數(shù)的公式進(jìn)行簡(jiǎn)單修改可以實(shí)現(xiàn)-180DEG到+180DEG(或者是其他范圍的值)的SINE,COSINE值--例如:--sin（π/2＋α）＝cosα--cos（π/2＋α）＝－sinα---- system delay: 21 (data out delay: 20)--library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_arith.all;entity sc_corproc is	port(		clk	: in std_logic;		ena	: in std_logic;		Ain	: in signed(15 downto 0);				sin	: out signed(15 downto 0);		cos	: out signed(15 downto 0)		);end entity sc_corproc;architecture dataflow of sc_corproc is	constant PipeLength : natural := 15;	constant P : signed(15 downto 0) := x"4dba";	-- define aggregate constant	component p2r_cordic is	generic(		PIPELINE : integer := 15;		WIDTH    : integer := 16);	port(		clk : in std_logic;		ena : in std_logic;		Xi : in signed(WIDTH -1 downto 0);		Yi : in signed(WIDTH -1 downto 0) := (others => '0');		Zi : in signed(WIDTH -1 downto 0);				Xo : out signed(WIDTH -1 downto 0);		Yo : out signed(WIDTH -1 downto 0)	);	end component p2r_cordic;begin	u1:	p2r_cordic				generic map(PIPELINE => PipeLength, WIDTH => 16)			port map(clk => clk, ena => ena, Xi => P, Zi => Ain, Xo => cos, Yo => sin);end architecture dataflow;