【正文】 MOV SBUF, 38H JNB TI, $ CLR TI POP PSW POP ACC RET 。鎖定狀態(tài)顯示 XSE:PUSH ACC PUSH PSW MOV SBUF, 0FEH JNB TI, $ CLR TI MOV SBUF, 54H JNB TI, $ CLR TI MOV SBUF, 39H JNB TI, $ CLR TI MOV SBUF, 11H JNB TI, $ CLR TI MOV SBUF, 3DH JNB TI, $ CLR TI MOV SBUF, 0FEH JNB TI, $ CLR TI POP PSW POP ACC RET XSF:PUSH ACC PUSH PSW MOV SBUF, 98H JNB TI, $ CLR TI MOV SBUF, 38H JNB TI, $ CLR TI MOV SBUF, 39H JNB TI, $ CLR TI MOV SBUF, 39H JNB TI, $ CLR TI MOV SBUF, 3DH 。U JNB TI, $ CLR TI MOV SBUF, 98H JNB TI, $ CLR TI POP PSW POP ACC RET KILLXS:PUSH ACC PUSH PSW MOV R7, 06H LOOP_XS:MOV SBUF, 0FFH JNB TI, $ CLR TI DJNZ R7,LOOP_XS NOP POP PSW POP ACC RET TAB: DB 11H,0D7H,32H,92H,0D4H,98H,18H,0D1H,10H,90H ,0FFH。******* 24C02讀寫程序 PUSH ACC MOV R0,AT1 。CPU首地址 MOV R6,06H 。8字節(jié) MOV R5,08H 。8位 MOV R7,00H 。24C02首地址 LCALL READ 。讀數(shù)據(jù) NOP NOP POP ACC POP PSW RET AT_WR: PUSH PSW PUSH ACC MOV R0,PS1 。CPU RAM首地址 MOV R6,06H 。8字節(jié) MOV R5,08H 。8 BIT MOV R7,00H 。24C02 RAM 首地址 LCALL WRT 。先寫進(jìn) NOP NOP POP ACC POP PSW RET。讀串行器件 R0:RAM的起始地址,R5:位計(jì)數(shù)器,。R6:讀的字節(jié)數(shù)，R7:讀的起始地址READ: NOP NOP LCALL START0 MOV A,0A0H LCALL WRB LCALL ACK JB F0,RD_FAIL MOV A,R7 LCALL WRB LCALL CHK JB F0,RD_FAIL LCALL START0 MOV A,0A1H LCALL WRB LCALL CHK JB F0,RD_FAILRD_N: NOP NOP LCALL RDB MOV @R0,A DJNZ R6,GO_ACK LCALL N_ACK RD_FAIL:NOP LCALL STOP MOV A,0FFH RET 。*************readGO_ACK: NOP NOP DEC R0 LCALL ACK JMP RD_N。寫串行器件 R0:RAM的起始地址,R5:位計(jì)數(shù)器,。R6:寫的字節(jié)數(shù)(頁)，R7:寫的起始地址WRT: NOP NOP LCALL START0 MOV A,0A0H LCALL WRBYT LCALL CHK JB F0,WR_FAIL MOV A,R7 LCALL WRBYT LCALL CHK JB F0,WR_FAILWR_N: NOP NOP MOV A,@R0 LCALL WRBYT LCALL CHK JB F0,WR_FAIL DEC R0 DJNZ R6,WR_NWR_FAIL:NOP LCALL STOP MOV A,0FFH RET 。*********wrt。START0: NOPNOP SETB SDA SETB SCL NOP NOP CLR SDA NOP NOP CLR SCL NOP RET。STOP: NOP NOP CLR SDA SETB SCL NOP NOP SETB SDA NOP NOP CLR SCL NOP RET。ACK: NOP NOP CLR SDA SETB SCL NOP NOP CLR SCL SETB SDA NOP RET。N_ACK: NOP NOP SETB SDA SETB SCL NOP NOP CLR SCL CLR SDA NOP RET。CHK: NOP NOP SETB SDA NOP NOP SETB SCL NOP NOP MOV C,SDA MOV F0,C CLR SCL NOP NOP RET。RDB: NOP NOP SETB SDA MOV R5,8RD_B: NOP NOP CLR SCL NOP NOP SETB SCL NOP NOP MOV C,SDA RLC A NOP NOP SETB SDA CLR SCL DJNZ R5,RD_B NOP RET。一字節(jié)數(shù)據(jù)發(fā)送子程序WRBYT: MOV R5,8WLP: RLC A JC WR1 CLR SDA SETB SCL NOP NOP CLR SCL DJNZ R5,WLP RET WR1: SETB SDA SETB SCL NOP NOP CLR SCL CLR SDA DJNZ R5,WLP RET。WRB: NOP NOP MOV R5,8WR_B: NOP NOP SETB SDA RLC A JC WR_1 CLR SDA NOPWR_1: SETB SCL NOP NOP CLR SCL NOP CLR SDA NOP DJNZ R5,WR_B NOP RET。***** 毫秒延時(shí)程序 T10MSD:SETB RS0 MOV R4, 12 TM:MOV R3, 128 TM6:DJNZ R3, TM6 DJNZ R4, TM CLR RS0 RET T100MSD:MOV R3, 200 D11:MOV R4, 125 D12:DJNZ R4, D12 DJNZ R3, D11 RET T500MSD:LCALL T100MSD LCALL T100MSD LCALL T100MSD LCALL T100MSD LCALL T100MSD NOP RET SEC:SETB RS1 MOV R7, 0AH SEC_LP:LCALL T100MSD DJNZ R7,SEC_LP NOP CLR RS1 RET END