?? comcoun.vhd
字號:
--comcoun.vhd 7 segment com scan counter
library ieee ;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity comcoun is
port(
clk : in std_logic;--synchronouse clock
f1k_ena : in std_logic;--scan clock
comclk : out std_logic_vector(1 downto 0));--output count
end comcoun;
architecture behavior of comcoun is
signal q : std_logic_vector(1 downto 0);--internal counted signal
begin
fscan:process(clk)
begin
if (clk'event and clk='1') then
if (f1k_ena='1') then
if q>=3 then
q<="00";--initial counter
else
q<=q+1;--counting
end if;
end if;
end if;
end process fscan;
comclk<=q;--output internal count
end behavior;
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