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em đang lập trình đồng hồ số.khj em chuyển qua chương trình chỉnh thời gian cho đồng hồ số thì khj dùng lệnh dec hoạc inc thì bit nó bị tràn (em nghj là thế) nên nó hiện trên led 7 thanh loạn hết cả lên.bác nào có cách khắc phục tình trạng trên hộ em với
có cái video
có cái video
Code:
SCL BIT P3.0 SDA BIT P3.1 DULIEU EQU 50H ADD_DATA EQU 54H GIO EQU 51H PHUT EQU 52H GIAY EQU 53H ORG 00H LJMP MAIN ORG 0013H LJMP CHINH_GIO ORG 40H MAIN: MOV IE,#10000100b WAIT: CALL HIEN_NORMAL SJMP WAIT HIEN_NORMAL: CALL HIEN_S CALL HIEN_P CALL HIEN_H RET HIEN_S: MOV ADD_DATA,#00H CALL READ_DATA MOV GIAY,DULIEU CALL HIENTHI_S RET HIEN_P: MOV ADD_DATA,#01H CALL READ_DATA MOV PHUT,DULIEU CALL HIENTHI_P RET HIEN_H: MOV ADD_DATA,#02H CALL READ_DATA MOV GIO,DULIEU CALL HIENTHI_H RET SEND_DATA: CALL START MOV A,#0D0H CALL SEND SETB SCL CLR SCL MOV A,ADD_DATA CALL SEND SETB SCL CLR SCL MOV A,DULIEU CALL SEND SETB SCL CLR SCL CALL STOP RET READ_DATA: CALL START MOV A,#0D0H CALL SEND SETB SCL CLR SCL MOV A,ADD_DATA CALL SEND SETB SCL CLR SCL CALL STOP CALL START MOV A,#0D1H CALL SEND SETB SCL CLR SCL CALL RECIVE SETB SCL CLR SCL CALL STOP RET SEND: MOV R1,#8 LOOP: RLC A MOV SDA,C SETB SCL CLR SCL DJNZ R1,LOOP RET RECIVE: MOV R1,#8 CLR A LOOP1: MOV C,SDA SETB SCL CLR SCL RLC A DJNZ R1,LOOP1 MOV DULIEU,A RET START: SETB SDA SETB SCL NOP CLR SDA NOP CLR SCL RET STOP: CLR SCL CLR SDA NOP SETB SCL NOP SETB SDA RET HIENTHI_S: MOV P2,#00000000B SWAP A ANL A,#00001111B MOV DPTR,#MALED ; MOVC A,@A+DPTR MOV P1,A SETB P2.0 CALL DELAY CLR P2.0 MOV A,DULIEU ANL A,#00001111B MOV DPTR,#MALED ; MOVC A,@A+DPTR MOV P1,A SETB P2.1 CALL DELAY CLR P2.1 RET HIENTHI_P: MOV P2,#00000000B SWAP A ANL A,#00001111B MOV DPTR,#MALED ; MOVC A,@A+DPTR MOV P1,A SETB P2.2 CALL DELAY CLR P2.2 MOV A,DULIEU ANL A,#00001111B MOV DPTR,#MALED ; MOVC A,@A+DPTR MOV P1,A SETB P2.3 CALL DELAY CLR P2.3 RET HIENTHI_H: MOV P2,#00000000B SWAP A ANL A,#00001111B MOV DPTR,#MALED ; MOVC A,@A+DPTR MOV P1,A SETB P2.4 CALL DELAY CLR P2.4 MOV A,DULIEU ANL A,#00001111B MOV DPTR,#MALED ; MOVC A,@A+DPTR MOV P1,A SETB P2.5 CALL DELAY CLR P2.5 RET CHINH_GIO: JNB P3.2,OUTH MOV A,GIO MOV DULIEU,GIO CALL HIENTHI_H CALL CHECK SJMP CHINH_GIO OUTH: MOV ADD_DATA,#02H CALL SEND_DATA JNB P3.2,$ sjmp CHINH_PHUT CHECK: JB P3.4,CHECK2 JNB P3.4,$ INC GIO MOV A,GIO CJNE A,#24H,CHECK CALL MINGIO SJMP CHECK CHECK2: JB P3.5,EXIT JNB P3.5,$ MOV A,GIO CJNE A,#00H,GIAM CALL MAXGIO RET GIAM: DEC GIO SJMP CHINH_GIO EXIT: RET MAXGIO: MOV GIO,#23H RET MAXPHUT: MOV GIO,#59H RET MAXGIAY: MOV GIO,#59H RET MINGIO: MOV GIO,#00H RET MINPHUT: MOV PHUT,#00H RET MINGIAY: MOV GIAY,#00H RET CHINH_PHUT: JNB P3.2,OUTP MOV A,PHUT MOV DULIEU,PHUT CALL HIENTHI_P CALL CHECKP SJMP CHINH_PHUT OUTP: MOV ADD_DATA,#01H CALL SEND_DATA JNB P3.2,$ sjmp CHINH_GIAY CHECKP: JB P3.4,CHECKP2 JNB P3.4,$ INC PHUT MOV A,PHUT CJNE A,#60H,CHECKP CALL MINPHUT SJMP CHECKP CHECKP2: JB P3.5,EXIT JNB P3.5,$ MOV A,PHUT CJNE A,#00H,GIAMPHUT CALL MAXPHUT RET GIAMPHUT: DEC PHUT LJMP CHINH_PHUT RET CHINH_GIAY: JNB P3.2,OUTS MOV A,GIAY MOV DULIEU,GIAY CALL HIENTHI_S CALL CHECKS SJMP CHINH_GIAY OUTS: MOV ADD_DATA,#00H CALL SEND_DATA RETI CHECKS: JB P3.4,CHECKS2 JNB P3.4,$ INC GIAY MOV A,GIAY CJNE A,#60H,CHECKS CALL MINGIAY SJMP CHECKS CHECKS2: JB P3.5,EXIT JNB P3.5,$ MOV A,GIAY CJNE A,#00H,GIAMGIAY CALL MAXGIAY RET GIAMGIAY: DEC GIAY LJMP CHINH_GIAY RET DELAY: MOV R1,#99 DJNZ R1,$ RET MALED: DB 40H,79H,24H,30H,19H,12H,02H,78H,00H,10H END
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