sbitRS=P2^0;//P1.0之代称为RS sbitRW=P2^1;//P1.1之代称为RW sbitE=P2^2;//P1.2之代称为E sbitADCRD=P3^0;//设定P3.0为ADCRD的功能接脚 sbitADCWR=P3^1;//设定P3.1为ADCWR的功能接脚 charcode*keycode[]={"0","1","