_primary.vhd

一个电子中的verilog实验源代码。适合verilog初学者学习参考

library verilog;
use verilog.vl_types.all;
entity second is
    generic(
        Time_screen     : integer := 1;
        Time_set        : integer := 2;
        Date_set        : integer := 4;
        Clock_set       : integer := 8;
        Sec_clock       : integer := 16;
        O_light_set     : integer := 32;
        Sec_on          : integer := 2;
        Sec_stop        : integer := 1;
        Sec_reset       : integer := 4
    );
    port(
        clk_100         : in     vl_logic;
        reset           : in     vl_logic;
        mode            : in     vl_logic_vector(5 downto 0);
        mode_sec        : in     vl_logic_vector(2 downto 0);
        sec_m_count     : out    vl_logic_vector(7 downto 0);
        sec_s_count     : out    vl_logic_vector(7 downto 0);
        sec_ms_count    : out    vl_logic_vector(7 downto 0)
    );
end second;