tiaojia.vhd

消抖程序

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity tiaojia is
--实现调价功能
  port
	(  flag1    : in  std_logic;                       --调价状态标志
	   sure     : in  std_logic;
         up     : in  std_logic;
       price1   : out std_logic_vector (3 downto 0);   --调价输出
       price2   : out std_logic_vector (3 downto 0);
       price3   : out std_logic_vector (3 downto 0)
             );
end entity;

architecture arc of tiaojia is
signal count      :  std_logic_vector (1 downto 0);
begin

process(up,count)
variable data1  :  std_logic_vector (3 downto 0);
 begin
if(count /= "00" or flag1='0') then null;            --00时调 price1
elsif(up'event and up='1')then
     if(data1="1001")then data1:="0000";
           else
       data1:=data1+1;
     end if;
end if;
 price1<=data1;

end process;


process(up,count)
variable data2  :  std_logic_vector (3 downto 0);
 begin
if(count /= "01"or flag1='0') then null;             --01时调 price2
elsif(up'event and up='1')then
     if(data2="1001")then data2:="0000";
          else
            data2:=data2+1;
     end if;
end if;
 price2<=data2;
end process;


process(up,count)
variable data3  :  std_logic_vector (3 downto 0);
 begin
if(count /= "10"or flag1='0') then null;            --10时调 price3

elsif(up'event and up='1')then
   if(data3="1001")then data3:="0000";
      else
       data3:=data3+1;
   end if;
end if;
price3<=data3;
end process;


--各位循环调价
process(sure) is
variable count1  :  std_logic_vector (1 downto 0):="00";
begin
if( flag1='0') then null;
 elsif(sure'event and sure='1')then
   if(count1="10")then count1:="00";
   else
        count1:=count1+1;
   end if;
end if;
count<=count1;
end process;
end arc;