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RS BIT P3.0RW BIT P3.1E BIT P3.5DB0_DB7 DATA P1;********************************ORG 00HAJMP STARTORG 000BHAJMP INSE;********************************ORG 50HSTART: MOV TMOD,#0MOV TL0,#0MOV TH0,#0SETB EASETB ET0SETB TR0MOV R5,#50MOV SP,#60HACALL INITMOV A,#10000000B ACALL WriteMOV A,#01000011BACALL WriteDDRACALL DELAYMOV A,#01001000BACALL WriteDDRACALL DELAYMOV A,#01000101BACALL WriteDDRACALL DELAYMOV A,#01001110BACALL WriteDDRACALL DELAYMOV A,#01000111BACALL WriteDDRACALL DELAYMOV A,#00000000BACALL WriteDDRACALL DELAYMOV A,#00101011BACALL WriteDDRACALL DELAYLOOP: AJMP LOOP;*******************************INSE: MOV TL0,#0 MOV TH0,#0DJNZ R5,NOMOV R5,#50NO: RETI;******************************INIT:MOV A,#00111000B LCALL WriteMOV A,#00001110B LCALL WriteMOV A,#00000110B LCALL WriteRET;*******************************CheckBusy: PUSH ACCCB_Loop: CLR RSSETB RWCLR ESETB EMOV A,DB0_DB7CLR EJB ACC.7,CB_LoopPOP ACCACALL DELAYRET;********************************Write: ACALL CheckBusyCLR ECLR RSCLR RWSETB EMOV DB0_DB7,ACCCLR ERET;********************************WriteDDR: ACALL CheckBusyCLR ESETB RSCLR RWSETB EMOV DB0_DB7,ACCCLR ERET;**********************************DELAY: MOV R6,#100D1: MOV R7,#248DJNZ R7,$DJNZ R6,D1RETEND