单片机60秒倒计时，含C语言及汇编程序，定时器中断

ORG 0000H SJMP START ORG 0003H SJMP INT0S ORG 0013H SJMP INT1S START: MOV IE,#85H MOV TCON,#05H MOV A, #0FEH MOV P3,#0FFH SETB PX1 ST0: MOV A, #00h ST1: PUSH ACC ACALL SEG7 MOV P0, A ACALL DELAY POP ACC INC A CJNE A, #9 , ST1 SJMP ST0 INT0S: PUSH ACC MOV A, #0 LOOP: PUSH ACC ACALL SEG7 MOV P2, A POP ACC INC ACC ACALL DELAY CJNE A, #9,LOOP POP ACC MOV P2,#0FFH RETI INT1S: PUSH ACC MOV A, #0 LOOP1: PUSH ACC ACALL SEG7 MOV P1, A POP ACC INC ACC ACALL DELAY CJNE A, #9,LOOP1 POP ACC MOV P1,#0FFH RETI DELAY: MOV R7,#250 D1: MOV R6,#250 D2: NOP NOP NOP NOP NOP NOP DJNZ R6,D2 DJNZ R7,D1 RET SEG7: INC A MOVC A, @A+PC RET DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,77H,7CH,39H,5EH,79H,71H /*DB 0C0H,0F9H,0A4H,0B0H DB 99H,92H,82H,0F8H,80H */ END