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[/] [all_digital_fm_receiver/] [trunk/] [circuit_tb.vhd] - Rev 5
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LIBRARY ieee; USE ieee.std_logic_1164.ALL; USE IEEE.numeric_std.ALL; USE std.textio.ALL; ENTITY circuit_tb IS END circuit_tb; ARCHITECTURE behavior OF circuit_tb IS file vectors: text open read_mode is "fm.txt"; COMPONENT circuit PORT( clk : IN std_logic; reset : IN std_logic; fmin : IN std_logic_vector(7 downto 0); dmout : OUT std_logic_vector(11 downto 0) ); END COMPONENT; SIGNAL clk : std_logic := '0' ; SIGNAL reset : std_logic := '1'; SIGNAL fmin : std_logic_vector(7 downto 0); SIGNAL dmout : std_logic_vector(11 downto 0); constant clkperiod : time := 62.5 ns; -- 16 MHz of frequency BEGIN uut: circuit PORT MAP( clk => clk, reset => reset, fmin => fmin, dmout => dmout ); RESET_GEN: process begin LOOP1: for N in 0 to 3 loop wait until falling_edge(CLK); end loop LOOP1; RESET <= '0' ; end process RESET_GEN; clk <= not clk after clkperiod / 2; process variable vectorline : line; variable fmin_var : bit_vector(7 downto 0); begin while not endfile(vectors) loop if (reset = '1') then fmin <= (others => '0'); else readline(vectors, vectorline); read(vectorline, fmin_var); fmin <= to_stdlogicvector(fmin_var); end if; wait for clkperiod; end loop; end process; END;