LCD循环显示字符串。首先在第1行显示"Hello!"，2s后在第2行显示字符串"Welcome to LCD"，再过2s后第1行改为"Nice to meet you"，再过2s第2行改为"Good luck!"。端口说明：P1口的P1.0~P1.7接液晶显示屏数据端的DB0~DB7，P3.5接RS端，P3.6接RW端，P3.7接E端-LCD display string loop. First in line 1 show " Hello!" , 2s line 2 after the display string " Welcome to LCD" , line 1, after a few 2s to " Nice to meet you" , read another line 2 2s " Good luck!" . Port Descr iption: P1 port P1.0 ~ P1.7 access the data side of the LCD DB0 ~ DB7, P3.5 access RS side, P3.6 connected RW side, P3.7 access E-side