cordic_tst.vhd

SINE COSINE三角函数硬件实现代码

-- VHDL Test Bench Created from source file sc_corproc.vhd -- 12/07/06  11:47:39
--
-- Notes: 
-- 1) This testbench template has been automatically generated using types
-- std_logic and std_logic_vector for the ports of the unit under test.
-- Lattice recommends that these types always be used for the top-level
-- I/O of a design in order to guarantee that the testbench will bind
-- correctly to the timing (post-route) simulation model.
-- 2) To use this template as your testbench, change the filename to any
-- name of your choice with the extension .vhd, and use the "source->import"
-- menu in the ispLEVER Project Navigator to import the testbench.
-- Then edit the user defined section below, adding code to generate the 
-- stimulus for your design.
-- 3) VHDL simulations will produce errors if there are Lattice FPGA library 
-- elements in your design that require the instantiation of GSR, PUR, and
-- TSALL and they are not present in the testbench. For more information see
-- the How To section of online help.  
--
LIBRARY ieee;
LIBRARY generics;
USE ieee.std_logic_1164.ALL;
USE ieee.std_logic_signed.ALL;
USE ieee.std_logic_arith.ALL;
USE generics.components.ALL;

ENTITY cordic_tst IS
END cordic_tst;

ARCHITECTURE behavior OF cordic_tst IS 

	COMPONENT sc_corproc
	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 COMPONENT;

	SIGNAL clk :  std_logic:='0';
	SIGNAL ena :  std_logic:='0';
	SIGNAL Ain :  signed(15 downto 0):=(others=>'0');
	SIGNAL sin :  signed(15 downto 0);
	SIGNAL cos :  signed(15 downto 0);
	
   constant clk_period : time :=20 ns;
   
BEGIN
	
	clk<= (not clk) after (clk_period/2);

	uut: sc_corproc PORT MAP(
		clk => clk,
		ena => ena,
		Ain => Ain,
		sin => sin,
		cos => cos
	);


-- *** Test Bench - User Defined Section ***
	
   tb : PROCESS
   BEGIN
    	wait for (clk_period*5);
    	ena<='0';
    	Ain<=(others=>'0');
		wait for (clk_period*4);
		Ain<=X"0000";
		ena<='1';
		wait for (clk_period*40);
		ena<='0';
		wait for (clk_period*1);
		ena<='1';
		Ain<=X"1555";
		wait for (clk_period*40);
		ena<='0';
		wait for (clk_period*1);
		ena<='1';
		Ain<=X"2000";
		wait for (clk_period*40);
		ena<='0';
		wait for (clk_period*1);
		ena<='1';
		Ain<=X"2AAA";
		wait for (clk_period*40);
		ena<='0';
		wait for (clk_period*1);
		ena<='1';
		Ain<=X"4000";
		wait for (clk_period*40);
		ena<='0';
		wait for 20 ns;
		
      wait; -- will wait forever
   END PROCESS;
-- *** End Test Bench - User Defined Section ***

END;