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DISPBUF EQU 30H
DISPCNT EQU 38H
DISPBIT EQU 39H
T1CNTA EQU 3AH
T1CNTB EQU 3BH
CNT EQU 3CH
ORG 00H
;*******************************************************************************************
;程序开始
;*******************************************************************************************
LJMP START
ORG 0BH
;*******************************************************************************************
;定时器T0中断服务程序入口
;*******************************************************************************************
LJMP INT_T0
;*******************************************************************************************
;主程序开始
;*******************************************************************************************
START: MOV DISPCNT,#8
MOV A,#10
MOV R1,#DISPBUF
LP: MOV @R1,A
INC R1
DJNZ DISPCNT,LP ;DISPBUF为首的存储区初始化
MOV DISPBIT,#00H
MOV T1CNTA,#00H
MOV T1CNTB,#00H
MOV CNT,#00H
MOV TMOD,#01H ;定时器T0工作在方式1
MOV TH0,#(65536-1000) / 256
MOV TL0,#(65536-1000) MOD 256 ;装定时器T0初值
SETB TR0 ;允许定时器T0计数
SETB ET0 ;允许定时器T0中断
SETB EA ;开中断
SJMP $
;*******************************************************************************************
;定时器T0中断服务程序
;*******************************************************************************************
INT_T0:
MOV TH0,#(65536-1000) / 256
MOV TL0,#(65536-1000) MOD 256
MOV A,DISPBIT
ADD A,#DISPBUF
MOV R0,A
MOV A,@R0
MOV DPTR,#TABLE
MOVC A,@A+DPTR
MOV P0,A ;通过查表方式，获得显示代码送入P0
MOV A,P1
ANL A,#0F8H
ADD A,DISPBIT
MOV P1,A
INC DISPBIT
MOV A,DISPBIT
CJNE A,#08H,NEXT
MOV DISPBIT,#00H
NEXT: INC T1CNTA
MOV A,T1CNTA
CJNE A,#50,LL1
MOV T1CNTA,#00H
INC T1CNTB
MOV A,T1CNTB
CJNE A,#8,LL1
MOV T1CNTB,#00H
INC CNT ; 0.4秒定时到了，则CNT加1
MOV A,CNT
CJNE A,#9,LLX
MOV CNT,#00H
MOV A,CNT
LLX: CJNE A,#01H,NEX1
MOV 30H,#1
LL1: LJMP DONE
NEX1: CJNE A,#02H,NEX2
MOV 31H,#1
MOV 30H,#2
LJMP DONE
NEX2: CJNE A,#03H,NEX3
MOV 32H,#1
MOV 31H,#2
MOV 30H,#3
LJMP DONE
NEX3: CJNE A,#04H,NEX4
MOV 33H,#1
MOV 32H,#2
MOV 31H,#3
MOV 30H,#4
LJMP DONE
NEX4: CJNE A,#05H,NEX5
MOV 34H,#1
MOV 33H,#2
MOV 32H,#3
MOV 31H,#4
MOV 30H,#5
LJMP DONE
NEX5: CJNE A,#06H,NEX6
MOV 35H,#1
MOV 34H,#2
MOV 33H,#3
MOV 32H,#4
MOV 31H,#5
MOV 30H,#6
LJMP DONE
NEX6: CJNE A,#07H,NEX7
MOV 36H,#1
MOV 35H,#2
MOV 34H,#3
MOV 33H,#4
MOV 32H,#5
MOV 31H,#6
MOV 30H,#7
LJMP DONE
NEX7: CJNE A,#08H,NEX8
MOV 37H,#1
MOV 36H,#2
MOV 35H,#3
MOV 34H,#4
MOV 33H,#5
MOV 32H,#6
MOV 31H,#7
MOV 30H,#8
LJMP DONE
NEX8: CJNE A,#00H,DONE
MOV 37H,#10
MOV 36H,#10
MOV 35H,#10
MOV 34H,#10
MOV 33H,#10
MOV 32H,#10
MOV 31H,#10
MOV 30H,#10
LL: LJMP DONE
DONE: RETI
TABLE: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,00H
END
;*******************************************************************************************
;在进行数码显示的时候，要对显示单元开辟8个显示缓冲区，每个显示缓冲区装有显示的不同数据即可。
;*******************************************************************************************