_primary.vhd

实现音乐播放的FPGA的实验源码（Verilog语言）

library verilog;
use verilog.vl_types.all;
entity song is
    port(
        clk             : in     vl_logic;
        speaker         : out    vl_logic;
        index           : in     vl_logic_vector(2 downto 0);
        seg             : out    vl_logic_vector(6 downto 0);
        seg_scan        : out    vl_logic_vector(2 downto 0)
    );
end song;