急急谁能帮我解释一下这个显示子程序啊 3位共阴数码管 分别和3个74ls164相连 可提高悬赏啊最好画出流程图 10
DISP:MOVDPTR,#TABMOVA,7FHMOVCA,@A+DPTRACALLSOMOVA,7EHMOVCA,@A+DPTRACALLSOMOVA,7DHMOVC...
DISP:
MOV DPTR,#TAB
MOV A,7FH
MOVC A,@A+DPTR
ACALL SO
MOV A,7EH
MOVC A,@A+DPTR
ACALL SO
MOV A,7DH
MOVC A,@A+DPTR
ACALL SO
RET
SO:
MOV R7,#8
SO1:CLR P1.6
RRC A
MOV P1.7,C
SETB P1.6
DJNZ R7,SO1
RET
TAB:
DB 3FH,06H,5BH,4FH
DB 66H,6DH,7DH,07H
DB 7FH,6FH,0BFH,86H
DB 0DBH,0CFH,0E6H,0EDH
DB 0FDH,87H,0FFH,0EFH
DB 0FFH,00H
DELAY:
MOV R5,#05H
DEL1:MOV R6,0FFH
DEL2:MOV R7,0FFH
DJNZ R7,$
DJNZ R6,DEL2
DJNZ R5,DEL1
RET 展开
MOV DPTR,#TAB
MOV A,7FH
MOVC A,@A+DPTR
ACALL SO
MOV A,7EH
MOVC A,@A+DPTR
ACALL SO
MOV A,7DH
MOVC A,@A+DPTR
ACALL SO
RET
SO:
MOV R7,#8
SO1:CLR P1.6
RRC A
MOV P1.7,C
SETB P1.6
DJNZ R7,SO1
RET
TAB:
DB 3FH,06H,5BH,4FH
DB 66H,6DH,7DH,07H
DB 7FH,6FH,0BFH,86H
DB 0DBH,0CFH,0E6H,0EDH
DB 0FDH,87H,0FFH,0EFH
DB 0FFH,00H
DELAY:
MOV R5,#05H
DEL1:MOV R6,0FFH
DEL2:MOV R7,0FFH
DJNZ R7,$
DJNZ R6,DEL2
DJNZ R5,DEL1
RET 展开
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