现在我正在维瓦多做一个小项目,一个米利密克罗尼西亚联邦公司。程序必须检测6位序列001011,并在检测到序列时输出"1“。
有关序列检测的代码做得很好,但除此之外,它还必须使用三个触发器: JK、D和T。
对如何添加它们有任何建议或建议吗?
谢谢您抽时间见我。
这是密克罗尼西亚联邦的代码:
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
entity sequence is
port(
clk : in std_logic;
reset : in std_logic;
x: in std_logic;
z : out std_logic;
a : out std_logic;
b : out std_logic;
c : out std_logic;
d : out std_logic;
e : out std_logic;
f : out std_logic);
end sequence;
architecture behavioral of sequence is
type state_type is (Q0, Q1, Q2, Q3, Q4, Q5);
signal state, next_state : state_type;
begin
state_register: process (clk, reset)
begin
if (reset = '1') then --if reset is high, goto state Q0
state <= Q0;
elsif (clk'event and clk = '1') then --if not, and rising
state <= next_state; --edge, go to next state
end if;
end process;
next_state_func: process (x, state)
begin
case state is
when Q0 =>
if x = '0' then
next_state <= Q1;
else
next_state <= Q0;
end if;
when Q1 =>
if x = '0' then
next_state <= Q2;
else
next_state <= Q0;
end if;
when Q2 =>
if x = '1' then
next_state <= Q3;
else
next_state <= Q2;
end if;
when Q3 =>
if x ='0' then
next_state <= Q4;
else
next_state <= Q0;
end if;
when Q4 =>
if x = '1' then
next_state <= Q5;
else
next_state <= Q2;
end if;
when Q5 =>
if x = '1' then
next_state <= Q0;
else
next_state <= Q1;
end if;
end case;
end process;
-- This process controls the output of the sequence detector.
-- Each state has it's own output along with 'z' which indicates
-- the entire sequence 001011 has been detected.
output_func: process (x, state)
begin
case state is
when Q0 => z <= '0';
a <= '1';
b <= '0';
c <= '0';
d <= '0';
e <= '0';
f <= '0';
when Q1 => z <= '0';
a <= '0';
b <= '1';
c <= '0';
d <= '0';
e <= '0';
f <= '0';
when Q2 => z <= '0';
a <= '0';
b <= '0';
c <= '1';
d <= '0';
e <= '0';
f <= '0';
when Q3 => z <= '0';
a <= '0';
b <= '0';
c <= '0';
d <= '1';
e <= '0';
f <= '0';
when Q4 => z <= '0';
a <= '0';
b <= '0';
c <= '0';
d <= '0';
e <= '1';
f <= '0';
when Q5 => z <= '1';
a <= '0';
b <= '0';
c <= '0';
d <= '0';
e <= '0';
f <= '1';
end case;
end process;
end behavioral;1:https://i.stack.imgur.com/pVwxL.jpg -这里是包含FSM状态图表的表。
发布于 2017-10-26 07:31:56
你的代码错了。看看output_func过程;这是组合的,只是解码当前的状态,而不看x。a到f的输出是不必要的,只是当前状态的6位解码--为什么?z输出是在当前状态为Q5时设置的,这不是您想要的--整个过程都是多余的。如果当前状态为z,而x为1- ie,则需要在主FSM中设置x。关于next_state <= Q0跃迁。
在你的实际问题上-你不能强迫选择任何特定的F/F类型与此代码-合成器将做任何它想做的事,这意味着它将以D类型实现整个事情,因为JK已经过时了20年。T类型也可能是如此。您需要重新开始,并假装您有一个技术和一个具有T、D和JK的库。自己编写这些独立的实体,重新编写代码实例化这些组件,而不是让合成器推断它们。重写你的FSM来使用JKs -你给出的图表显示了你是如何使用的。换句话说,导出每个F/F的J和K输入,z输出可以是D型。你应该能在某个地方适应T-我已经把它留给你了。
https://stackoverflow.com/questions/46924340
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