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以下8选一程序用到WORK1库，不知道怎样才能通过编译产生符号。<br />library IEEE;<br />use IEEE.std_logic_1164.all;<br />use IEEE.std_logic_arith.all;<br />use IEEE.std_logic_unsigned.all;<br /><br />library WORK1;<br />use WORK1.SER_PAR_LIB.all;<br /><br /><br />entity MUX_8X1 is<br /> port (<br /> DIN: in STD_LOGIC_VECTOR(7 downto 0);<br /> SEL: in STD_LOGIC_VECTOR(2 downto 0);<br /> MUXOUT: out STD_LOGIC<br /> );<br />end MUX_8X1;<br /><br />architecture MUX_8X1_arch of MUX_8X1 is<br />begin<br />with SEL select<br /> MUXOUT <= DIN(0) when "000", <br /> DIN(1) when "001",<br /> DIN(2) when "010",<br /> DIN(3) when "011",<br /> DIN(4) when "100",<br /> DIN(5) when "101",<br /> DIN(6) when "110",<br /> DIN(7) when others;<br />end MUX_8X1_arch; |
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