晶振12mhzincludereg51h>sbitRS=P2^0;RS数据和指令sbitRW=P2^1;读和写sbitEN=P2^2;读取时能sbitbusy=P0^7;sb
includereg52h>defineucharunsignedchardefineuintunsignedintsbitdula=P2^6;sbitwela=P2^7;sbitrs=P3^5
includereg52h>defineucharunsignedchardefineuintunsignedintsbitdula=P2^6;sbitwela=P2^7;sbitrs=P3^5
includereg52h>defineuintunsignedintdefineucharunsignedchartypedefbitBOOL;sbitio=P1^0;sbitrs
