saomiaoxianshi.vhd

消抖程序

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity saomiaoxianshi is
--clk 扫描脉冲
--p1,p2,p3,p4,p5,p6,p7 输入数据
-- choice 位选信号
--data  数码显示信号输出
  port(
		clk		: in	std_logic;
		flag0,flag1,flag2 ,switch  : in	std_logic;
	    p7		: in	std_logic_vector(3 downto 0);
		p6		: in	std_logic_vector(3 downto 0);
		p5		: in	std_logic_vector(3 downto 0);
		p4		: in	std_logic_vector(3 downto 0);
		p3		: in	std_logic_vector(3 downto 0);
		p2		: in	std_logic_vector(3 downto 0);
		p1		: in	std_logic_vector(3 downto 0);
		choice	: out	std_logic_vector(2 downto 0);
		data	: out	std_logic_vector(7 downto 0));
end saomiaoxianshi;


architecture arc of saomiaoxianshi is
	signal count    : std_logic_vector(2 downto 0);
	signal temp     : std_logic_vector(3 downto 0);
	signal datain	: std_logic_vector(6 downto 0);
begin 
--pr1 七进制计数
pr1:process(clk)
begin
if(clk'event and clk='1') then
  if(count="110") then count<="000";
  else count<=count+1;
  end if;
end if;
end process pr1;
--pr2扫描显示
pr2:process(clk)
begin
if(clk'event and clk='0')then
   choice<=count;
   data(7 downto 1)<=datain;
   
end if;
end process pr2;

ptr3: process(flag0,flag1,flag2,clk,switch)
begin
if(clk'event and clk='0')then

if((flag0='1'or flag1='1') and count="001" and switch='0')then data(0)<='1'; 
elsif(flag0='1'and count="010" and switch='1')then data(0)<='1';
elsif(flag2='1'and count="010" )then data(0)<='1';
else
data(0)<='0';
end if;
end if;
end process ptr3;


--译码显示
temp<=	p1 when count="000" else
		p2 when count="001" else
		p3 when count="010" else
		p4 when count="011" else
		p5 when count="100" else
		p6 when count="101" else
		p7;
with temp select
	datain  <= "0111111" when "0000",
			   "0000110" when "0001",
			   "1011011" when "0010",
			   "1001111" when "0011",
			   "1100110" when "0100",
			   "1101101" when "0101",
			   "1111101" when "0110",
			   "0000111" when "0111",
			   "1111111" when "1000",
			   "1101111" when "1001",
			   "1111001" when  others;
end arc;