library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;entity gaicuo isport ( clk,data,reset:in std_logic;dout:out std_logic);end gaicuo;architecture a of chk1 issignal temp:std_logic_vector(6 downto 1);signal tmp1:std_logic;begindout<=tmp1;process(clk,reset)beginif reset='0' thentemp<=(others=>'0'); tmp1<='0';elseif rising_edge(clk) thentemp(0)<=data;for i in 1 to 6 looptemp(i)<=temp(i-1);end loop;end if;end if;tmp1<= (not temp(0)) and temp(1) and (not temp(2))and (not temp(3))and temp(4) and temp(5) and temp(6);end process;end a;
时间: 2024-03-17 21:43:03 浏览: 141
std_logic_arith.rar_std_logic_arith
这段代码有以下几个问题:
1. 第 2 行的 `use ieee.std_logic_unsigned.all;` 应该改为 `use ieee.numeric_std.all;`,因为 `std_logic_unsigned` 已经被弃用了。
2. 第 5 行的 `architecture a of chk1 is` 应该改为 `architecture a of gaicuo is`,因为 `gaicuo` 才是实体的名称。
3. 第 8 行的 `begindout<=tmp1;` 应该改为 `begin`,因为这里是一个新的过程的开始。
4. 第 13 行和第 14 行的 `end if;` 应该删掉其中一个,因为这里只需要一个 `end if;`。
5. 第 16 行的 `tmp1<= (not temp(0)) and temp(1) and (not temp(2))and (not temp(3))and temp(4) and temp(5) and temp(6);` 应该改为 `tmp1<= (not temp(0)) and temp(1) and (not temp(2)) and (not temp(3)) and temp(4) and temp(5) and temp(6);`,因为每个逻辑运算符之间应该有空格隔开。
修改后的代码如下:
```
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity gaicuo is
port (
clk, data, reset: in std_logic;
dout: out std_logic
);
end gaicuo;
architecture a of gaicuo is
signal temp: std_logic_vector(6 downto 1);
signal tmp1: std_logic;
begin
dout <= tmp1;
process (clk, reset)
begin
if reset = '0' then
temp <= (others => '0');
tmp1 <= '0';
elsif rising_edge(clk) then
temp(0) <= data;
for i in 1 to 6 loop
temp(i) <= temp(i-1);
end loop;
tmp1 <= (not temp(0)) and temp(1) and (not temp(2)) and (not temp(3)) and temp(4) and temp(5) and temp(6);
end if;
end process;
end a;
```
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