?? msecond.vhd
字號:
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
entity msecond is
port(
clk, clr ,set : in std_logic;
ensec : out std_logic;
daout : out std_logic_vector (6 downto 0));
end entity msecond;
architecture fun of msecond is
signal count: std_logic_vector( 6 downto 0);
begin
daout <= count;
process ( clk,clr,set )
begin
if (clr='1') then
count <="0000000";
elsif (set='0')then
if (clk'event and clk='1') then
if (count(3 downto 0)="1001") then
if (count <"1100000") then
if (count="1011001") then
count<="0000000";
ensec<='1';
else
count<=count+7;
end if;
else
count<="0000000";
end if;
elsif(count <"1100000") then
count <= count + 1;
ensec<='0';
else
count<="0000000";
end if;
end if;
end if;
end process;
end fun;
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