用vhdll语言设计一个序列检测器检测序列1110010,每输入一个序列1110010则会在输出端输出一个1,其余时间为0
时间: 2024-01-22 17:17:55 浏览: 59
以下是一个基于VHDL语言的序列检测器设计:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
entity sequence_detector is
port (
clk : in std_logic;
reset : in std_logic;
input : in std_logic;
output : out std_logic
);
end entity sequence_detector;
architecture rtl of sequence_detector is
type state_type is (s0, s1, s2, s3, s4, s5, s6);
signal state : state_type := s0;
begin
process (clk, reset)
begin
if reset = '1' then
state <= s0;
output <= '0';
elsif rising_edge(clk) then
case state is
when s0 =>
if input = '1' then
state <= s1;
else
state <= s0;
end if;
output <= '0';
when s1 =>
if input = '1' then
state <= s2;
else
state <= s0;
end if;
output <= '0';
when s2 =>
if input = '1' then
state <= s3;
else
state <= s0;
end if;
output <= '0';
when s3 =>
if input = '0' then
state <= s4;
else
state <= s0;
end if;
output <= '0';
when s4 =>
if input = '0' then
state <= s5;
else
state <= s0;
end if;
output <= '0';
when s5 =>
if input = '1' then
state <= s6;
else
state <= s0;
end if;
output <= '0';
when s6 =>
if input = '0' then
state <= s0;
output <= '1';
else
state <= s0;
output <= '0';
end if;
end case;
end if;
end process;
end architecture rtl;
```
这个序列检测器使用了一个状态机来检测输入序列。它有7个状态,分别对应于输入序列中的每个比特。当输入比特与期望比特匹配时,状态机向前进入下一个状态。当输入比特与期望比特不匹配时,状态机回到初始状态。当状态机进入最终状态时,输出端口将设置为“1”,指示输入序列已经被检测到。在其他情况下,输出端口将设置为“0”。
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