sc_corproc.vhd
--
-- Calculates Sine and Cosine values
--
-- uses: p2r_codic.vhd and p2r_cordicpipe.vhd
-- 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;
帮忙大概解释下上面这个程序，它的大体结构以及实现的功能。万分感谢