跪求大牛帮忙，晚上12点就deadline了。。。

只看该作者 · 2013-10-17 16:27

就是一段VHDL程序设计遥控编码器电路，发送编码“101100”，不论键按下的持续时间多长（大于一个时钟周期），都只发送一次编码，按键按下到发送编码之间时间不限
这是我写的源码：这个编译是通过的
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

entity d1 is
  port(
clk: in std_logic;
key: in std_logic;
dout: out std_logic
  );
end entity d1;

architecture d1_1 of d1 is
  signal state:std_logic_vector(2 downto 0);
begin
  statep: process(clk) is
  begin
   if clk'event and clk='1' then
      case state is
      when "000"=>
      if key='0' then
         state<="000";
      else
         state<="001";
      end if;
      when "001"=>
      state<="010";
      when "010"=>
      state<="011";
      when "011"=>
      state<="100";
      when "100"=>
      state<="101";
      when "101"=>
      state<="110";
      when "110"=>
      if key='1' then
         state<="110";
      else
         state<="000";
      end if;
      when others=>state<="000";
      end case;
   end if;
end process;
  gp: process(state) is
  begin
case state is
when "000"=>dout<='0';
when "001"=>dout<='1';
when "010"=>dout<='0';
when "011"=>dout<='1';
when "100"=>dout<='1';
when "101"=>dout<='0';
when "110"=>dout<='0';
when others=>dout<='0';
end case;
  end process;
end architecture d1_1;
  然后这个是测试码

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

entity d1_test is
end entity d1_test;

architecture d1_test_1 of d1_test is
  component d1 is
port(
   clk: in std_logic;
   key: in std_logic;
   dout: out std_logic
   );
end component d1;
signal clk1: std_logic:='0';
signal key1: std_logic:='0';
signal dout1: std_logic;
begin
d1_module: d1 port map(clk=>clk1,key=>key1,dout=>dout1);
   simprocess:process
   begin
   key1<='0';
   wait for 100ns;
   key1<='1';
   wait for 1600ns;
   key1<='0';
   end process;
   clkprocess:process
   begin
   clk1<=not clk1 after 50ns;
   end process;
end architecture d1_test_1;
编译时没错有3个warning

然后仿真时怎么都没有波形，wave上面的变量永远是nodata，而且过一下就死机，已经弄了一下午了，求助大牛们花一点点时间看看是哪里错了，感激不尽啊