[求助]双向端口的问题 端口, 求助

xing198200

--*************************** --* 8 Bit UP Counter * --* Filename : counter8 * --*************************** library IEEE; use IEEE.std_logic_1164.all; use IEEE.std_logic_unsigned.all; entity counter8 is port ( CLK: in STD_LOGIC; Q: inout STD_LOGIC_VECTOR (0 to 7); RESET: in STD_LOGIC ); end counter8; architecture counter8_arch of counter8 is begin process (CLK,RESET,Q) begin if RESET = '1' then Q <= "00000000"; elsif CLK'event and CLK = '1' then Q <= Q + 1; end if; end process; end counter8_arch; 这是个升计数器,其计数范围为0-255; 大家看一下防真能不能得到结果,我是得不到. 是不是双向端口的问题,那位大峡能指点一下. 我用的是max+plusII