_primary.vhd

用vhdl编写的FFT的代码,很全,很强大.

library verilog;
use verilog.vl_types.all;
entity fft_test is
    port(
        clk             : in     vl_logic;
        reset           : in     vl_logic;
        xn_re           : out    vl_logic_vector(15 downto 0);
        xn_im           : in     vl_logic_vector(15 downto 0);
        xn_index        : out    vl_logic_vector(6 downto 0);
        ram_addr        : out    vl_logic_vector(6 downto 0);
        rfd             : out    vl_logic;
        xk_re           : out    vl_logic_vector(15 downto 0);
        xk_im           : out    vl_logic_vector(15 downto 0);
        blk             : out    vl_logic_vector(4 downto 0);
        start           : in     vl_logic;
        done            : out    vl_logic;
        xk_index        : out    vl_logic_vector(6 downto 0)
    );
end fft_test;