这是代码并将其保存为IR.vhd,而项目名称保存为“8051”
当我尝试在altera中编译vhdl程序时,它显示“错误(12007):顶级设计实体”8051“未定义 “......这是什么意思?
图书馆ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;
entity IR is
port(clk,rst,pb1:in std_logic;
irreg:in std_logic_vector(15 downto 0);
ops:out std_logic_vector(2 downto 0);
modes:out std_logic;
loc1:out std_logic_vector(3 downto 0);
loc2ordata:out std_logic_vector(7 downto 0));
end IR;
architecture rtl of IR is
signal ireg: std_logic_vector(15 downto 0);
begin
process (pb1)
begin
if(pb1='0')then --I am going to set up to feed in one instruction at a time
ireg<=irreg; --the instruction is executed when pb1 is pressed
end if;
end process;
ops<=ireg(15 downto 13);
modes<=ireg(12);
loc1<=ireg(11 downto 8);
loc2ordata<=ireg(7 downto 0);
end rtl;
答案 0 :(得分:0)
我注意到的是顶级实体名称需要与文件名和模块名称相同。因此,如果您调用顶级IR,则该文件可能需要为IR.v.现在我从不大写我的文件名,所以我实际上并不知道大写匹配是否重要。