AT93C66读写子程序.doc

AT93C66读写子程序，由文广开发小组整理 ;*************DEFINE MCU********* DCS EQU P1.4DSK EQU P1.5DDI EQU P1.6DDO EQU P1.7 ;********** FIRST ADRESS 010000000B,SB 1;OPCODE 10***;*************DISPLAY DATA READ FROM 9366******* IN_SB:clr dcsclr DSKsetb DDInopnopsetb DCSnopnopsetb DSKnopnopclr DSKret ;********trans 8 bit data to 9366;a save di 8 bit datawr1:MOV R4, #8clr cW10:RLC AMOV DDI,CNOPNOPSETB DSKNOPNOPCLR DSKDJNZ R4,W10RET ;********TRANS 3 BIT TO 9366 WR2:MOV R5,#3clr cW20:RRC AMOV DDI,CNOPNOPSETB DSKNOPNOPCLR DSKDJNZ R5,W20RET ;**********READ DATA FROM DE;*****OUT ARD1:MOV R4, #8 R10:NOPNOPSETB DSKNOPNOPCLR DSKMOV C,DDORLC ADJNZ R4,R10RET;*********8051 TRANS 8 BIT OPRATIONS (3 OP 8 ADDR);IN :B(2 OP 9 ADDR A8-A0),R4:HIGH 3 BIT AN ,R1:ADDRES ,R5: 8 BIT DATAWRITE:LCALL IN_SB ;WRITE perMISSIONMOV A, #100BLCALL WR2ORL A, #80HLCALL WR1LCALL IN_SB ;WRITE ERASE OPMOV A, #011BLCALL WR2MOV A,R1 LCALL WR1CLR DCSnopnopsetb dcsWAIT1:JNB DDO,WAIT1NOP NOPLCALL IN_SB ;WRITE OPMOV A,#010B LCALL WR2MOV A,R1LCALL WR1MOV A,#23H ;8 BIT DATALCALL WR1clr DCSNOPNOPsetb DCSWAIT: JNB DDO,WAITLCALL IN_SB ;WRITE forbit OPMOV A, #000BLCALL WR2ANL A, #7FHLCALL WR1clr DCSRET;8051 READ DATA ;IN:B (2 OP 6 BIT ADDR);OUT:R2(8 HIGH DATA) ,R3(8 LOW DATA)OUT_READ:LCALL IN_SBMOV A, #001B LCALL WR2 MOV A, r6LCALL WR1 nopnop mov a, #00h LCALL RD1MOV R3,Aclr DCS RET