我尝试在Quartus中为两个输入AND
门创建一个简单的hello world测试平台。我一直遇到以下错误:
错误(10500):在文本“IN”附近的Scott_2InputAndGate_Test.vhd(19)处的VHDL语法错误;期望标识符(“in”是保留关键字)或字符串文字
我的代码:
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------------TOP LEVEL ENTITY----------
--------------------------------------
LIBRARY IEEE;
USE IEEE.std_logic_1164.all;
USE IEEE.numeric_std.all;
ENTITY s_2InputAndGate IS
PORT(a, b : IN std_logic;
z : OUT std_logic);
END ENTITY s_2InputAndGate;
ARCHITECTURE behaviour OF s_2InputAndGate IS
BEGIN
z <= a AND b;
END ARCHITECTURE behaviour;
--------------------------------------
------------TESTBENCH-----------------
--------------------------------------
LIBRARY IEEE;
USE IEEE.std_logic_1164.all;
USE IEEE.numeric_std.all;
--No Entity for TestBench;
ENTITY s_2InputAndGate_Test IS END;
--Line 10
--Line 11
--Line 12...etc
--Behaviour of the Test bench;
ARCHITECTURE behaviour OF s_2InputAndGate_Test IS
SIGNAL A_test, B_test : IN std_logic; --lINE(19 - ERROR HERE!)
Z_test: OUT std_logic;
BEGIN
A_test <= 0;
B_test <= 0;
WAIT FOR 50ns;
A_test <= 0;
B_test <= 1;
WAIT FOR 50ns;
A_test <= 1;
B_test <= 0;
WAIT FOR 50ns;
A_test <= 1;
B_test <= 1;
WAIT;
END ARCHITECTURE behaviour;
编译器似乎一直在抱怨测试平台中的信号声明。我检查了语法,似乎无法找到任何明显的问题。任何人都有任何想法为什么这一行应该阻止编译成功?
答案 0 :(得分:1)
SIGNAL A_test, B_test : IN std_logic;
信号没有方向。只需使用:
SIGNAL A_test, B_test : std_logic;
此外,您的第Z_test: OUT std_logic;
行无效。删除方向后,可以将此信号声明与其他两个一起添加。