?? filter_tb.vhd
字號:
-- ----------------------------------------------------------------- Module: filter_tb---- Generated by MATLAB(R) 7.1 and the Filter Design HDL Coder 1.3.---- Generated on: 2008-09-18 15:51:03---- --------------------------------------------------------------- --------------------------------------------------------------- HDL Code Generation Options:---- TargetLanguage: VHDL-- LoopUnrolling: On-- InlineConfigurations: Off-- SafeZeroConcat: Off-- TestBenchStimulus: impulse step ramp chirp noise ---- Filter Settings:---- Discrete-Time FIR Filter (real)-- --------------------------------- Filter Structure : Direct-Form FIR-- Filter Length : 11-- Stable : Yes-- Linear Phase : Yes (Type 1)-- -------------------------------------------------------------LIBRARY IEEE;USE IEEE.std_logic_1164.all;USE IEEE.numeric_std.ALL;ENTITY filter_tb ISEND filter_tb;----------------------------------------------------------------ARCHITECTURE test OF filter_tb IS COMPONENT filter PORT( clk : IN std_logic; clk_enable : IN std_logic; reset : IN std_logic; filter_in : IN real; -- double filter_out : OUT real -- double ); END COMPONENT; FOR ALL : filter USE ENTITY work.filter(rtl); FUNCTION to_hex( x : IN std_logic_vector) RETURN string IS VARIABLE result : STRING(1 TO 256); -- 1024 bits max VARIABLE i : INTEGER; VARIABLE imod : INTEGER; VARIABLE j : INTEGER; VARIABLE newx : std_logic_vector(1023 DOWNTO 0); BEGIN newx := (OTHERS => '0'); newx(x'RANGE) := x; i := x'LENGTH-1; imod := x'LENGTH MOD 4; IF imod = 1 THEN i := i+3; ELSIF imod = 2 THEN i := i+2; ELSIF imod = 3 THEN i := i+1; END IF; j := 1; WHILE i >= 3 LOOP IF newx(i DOWNTO (i-3)) = "0000" THEN result(j) := '0'; ELSIF newx(i DOWNTO (i-3)) = "0001" THEN result(j) := '1'; ELSIF newx(i DOWNTO (i-3)) = "0010" THEN result(j) := '2'; ELSIF newx(i DOWNTO (i-3)) = "0011" THEN result(j) := '3'; ELSIF newx(i DOWNTO (i-3)) = "0100" THEN result(j) := '4'; ELSIF newx(i DOWNTO (i-3)) = "0101" THEN result(j) := '5'; ELSIF newx(i DOWNTO (i-3)) = "0110" THEN result(j) := '6'; ELSIF newx(i DOWNTO (i-3)) = "0111" THEN result(j) := '7'; ELSIF newx(i DOWNTO (i-3)) = "1000" THEN result(j) := '8'; ELSIF newx(i DOWNTO (i-3)) = "1001" THEN result(j) := '9'; ELSIF newx(i DOWNTO (i-3)) = "1010" THEN result(j) := 'A'; ELSIF newx(i DOWNTO (i-3)) = "1011" THEN result(j) := 'B'; ELSIF newx(i DOWNTO (i-3)) = "1100" THEN result(j) := 'C'; ELSIF newx(i DOWNTO (i-3)) = "1101" THEN result(j) := 'D'; ELSIF newx(i DOWNTO (i-3)) = "1110" THEN result(j) := 'E'; ELSIF newx(i DOWNTO (i-3)) = "1111" THEN result(j) := 'F'; ELSE result(j) := 'X'; END IF; i := i-4; j := j+1; END LOOP; RETURN result(1 TO j-1); END; FUNCTION to_hex( x : IN bit_vector ) RETURN string IS BEGIN RETURN to_hex( to_stdlogicvector(x) ); END; FUNCTION to_hex( x : IN signed ) RETURN string IS BEGIN RETURN to_hex( std_logic_vector(x) ); END; FUNCTION to_hex( x : IN unsigned ) RETURN string IS BEGIN RETURN to_hex( std_logic_vector(x) ); END; FUNCTION to_hex( x : IN real ) RETURN string IS BEGIN RETURN real'image(x); END; -- Type Definitions TYPE filter_in_table IS ARRAY (0 TO 3148) OF real; TYPE filter_out_table IS ARRAY (0 TO 3148) OF real; -- Constants CONSTANT filter_in_force : filter_in_table := ( 1.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 0.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 1.0000000000000000E+000, 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