LED数码管显示的电子表制作

ID:105323 · 发表于 2016-3-4 01:02

一、硬件电路：

硬件电路原理图如下，这是我15年前设计的一个LED数码管电子表，它是由一片51单片机，3片ULN2803，一个7805集成稳压器、SD2001A时钟模块及8只9014npn三极管和8只8550pnp三极管，红外线接收头组成，51单片机完成读写时钟，接收红外遥控指令，驱动数码管显示等任务。由于要驱动2.3寸的数码管，单片机的驱动能力不足，采用了NPN,PNP三极管组成的位驱动，用ULN2803组成段驱动，可以驱动24个数码管，可以显示日、月、年、星期、安全生产天数等。

二、51汇编程序
;电子表程序(源文件dzbc512.asm)
   YEAR EQU 20H          ;年
   MONTH  EQU 21H          ;月
   DAY    EQU 22H          ;日
   WEEK EQU 23H          ;星期
   HOUR EQU 24H          ;小时3031
   MINUTE EQU 25H          ;分钟3233
   SECOND EQU 26H          ;秒3435
   FLAG EQU 27H          ;通用标志寄存器
                                    ;BIT0=1, ACK ERR
                                    ;BIT0=0,ACK OK
                                    ;BIT1=1,TEST MODE
                                    ;BIT1=0,NORMAL MODE
   TIMETEMP    EQU 28H ;时间数据缓存器
   TIMETX       EQU 52H ;时间数据发送寄存器
   TIMERX       EQU 51H ;时间数据接收寄存器
   SDA          EQU 0b1h ;IIC的SDA口线
   SCL          EQU 0b0h ;IIC的SCL口线

         ORG 0000
         AJMP  L0
         ORG 000BH
      AJMP  CT
         ORG 001BH
         RETI
         ORG 0023H
         AJMP SI
         ORG 0030H
L0:       ;初始化程序
   MOV SP,#60H             ;定义堆栈
   CLR A                   ;开始初始化各寄存器
   MOV IE,A                ;关中断
   MOV P1,A
   MOV P2,A                ;PORT1,PORT2置0
   MOV TMOD,#91H             ;定时器0为16位定时器，
      MOV 8CH, #3CH
      MOV 8AH, #0B0H
   CLR FLAG
   LCALL  LONGDELAY             ;延时300ms
   LCALL  LONGDELAY             ;延时300ms
   LCALL  TIMESTATUS_INT12    ;24小时制
;-----------------------------------------------------------------
GET_TIME:
   CLR ET0                      ;关闭AT89C51的TIME0中断
   LCALL  READ_TIME             ;读SD2000内的实时时钟数据
   JNB SECOND.7,NO_TESTMODE
   LCALL  TIME_TESTMODE       ;测试模式结束
;    CLR SECOND.7             ;秒的最高位屏蔽为0
NO_TESTMODE:
   MOV R2,#3       ;读预置数据时分秒到30-35H内存单元
   MOV R0, #30H
   MOV R1,#24H
L1: MOV    A,@R1
   SWAP A
   ANL    A,#0FH
   MOV @R0,A
   INC R0
   MOV    A,@R1
   ANL    A,#0FH
   MOV @R0,A
   INC R1
   INC R0
   DJNZ R2,L1

   MOV    A,WEEK    ;星期数据
   ANL    A,#0FH
   MOV 37H,A

   MOV R2,#3       ;读预置数据年月日20H,21H,22H--42,43,44,45,46,47
   MOV R0, #42H
   MOV R1,#20H
L2: MOV    A,@R1
   SWAP A
   ANL    A,#0FH
   MOV @R0,A
   INC R0
   MOV    A,@R1
   ANL    A,#0FH
   MOV @R0,A
   INC R1
   INC R0
   DJNZ R2,L2
   MOV    A,#2          ;2003年表示成0003所以把2加上
   MOV 40H,A
   MOV R3, #30H
   CLRA
   MOV R7,A
   MOV 29H, A
   MOV 2AH,A
   MOV 2BH,A
   MOV 2CH, A
   MOV 2DH, A
MOV 2EH, A
   MOV 2FH,A
   MOV 50H,#01H
SETB EA                   ;开AT89C51中断
SETB ET0                   ;允许AT89C51的TIME0中断
SETB TR0                   ;T0开始计数

DIS:MOV DPTR,#0700H             ;显示子程序
      MOV R2, #01H
      MOV R1, #30H
  DIS1:MOV A, @R1
         MOVC  A,@A+DPTR

; CPL A

         MOV B,A
         MOV P0,A
      MOV A, R1
      MOV R4, A
      MOV A, #08H
         ADD A, R1
      MOV R1, A
      MOV A, @R1
      MOVC  A, @A+DPTR

; CPL A

         MOV B,A
      MOV P2,A
      MOV A, #08H
         ADD A, R1
      MOV R1, A
         MOV A, @R1
      MOVC  A, @A+DPTR

; CPL A

         MOV B,A
         MOV P3,A
      MOV A, R4
      MOV R1, A
         MOV A, R2
         MOV P1, A
         ACALL DELAY
         AJMP  JPCL

AN:    MOV A, #01H;置闪动标志
   MOV R7, A
   MOV A,2CH ;
   XRL A,#0AH ;键值=“A”显示地址加1
   JZ JIA
   MOV A, 2CH
   XRL A, #0BH;键值=“B”显示地址减1
   JZ JIAN1
   MOV A, 2CH
   XRL A, #0CH;键值=“C”复位
   JNZ BJ
   AJMP  L0
BJ:MOV A, 2CH
   AJMP  J5
SS: MOV A, R3
   MOV R0, A
   MOV A, b;2CH
   MOV @R0, A
   CLR A
   MOV R7, A
   AJMP  J6;SHAN

JIA:MOV A, R3
   XRL A, #47H
   JZ QCHU
; MOV A,#01H ;置闪动标志
; MOV R7, A
   MOV A,50H
   JNZ SHAN
   ACALL JIA1
   INC R3
   MOV 50H,#01H
QCHU:  MOV A, R3
   MOV R0, A
   MOV 2CH, @R0
   AJMP  SHAN
JIAN1:MOV  A, R3
   XRL A, #30H
   JZ QCHU1
; MOV A, #01H
; MOV R7, A
   MOV A,50H
   JNZ SHAN
   ACALL JIAN
   DEC R3
   MOV 50H,#01H
QCHU1:MOV  A, R3
   MOV R0, A
   MOV 2CH, @R0

SHAN: MOV A,R7          ;字符闪动用R7识别
   SETB  TR0
   JNZ G
   AJMP  J5
  G: MOV A, 2FH
   CJNE  A, #05H, J4
   MOV A, R3
   MOV R0, A
   MOV A,#11H       ;熄灭显示
   MOV @R0, A
   AJMP  J5
J4:    MOV A, R3
   MOV R0, A
   MOV A, 2CH
   MOV @R0,A       ;显示字符
J5:    MOV A,R2          ;移位
   RL A
   MOV R2, A
   INC R1
MOV A, R2
   JB 0E0H, J6
   AJMP  DIS1
J6: AJMP DIS
   ORG0200H             ;定时器子程序
CT: MOV 8CH, #3CH
   MOV 8AH, #0BEH
   PUSH  0D0H
   PUSH  0E0H
   PUSH  82H
   PUSH  83H
   MOV A, 2FH
   INC A
   MOV 2FH, A
   CJNE  A, #0AH, DONE;1/10
   MOV 2FH, #00H
   MOV  A,36H          ;1秒
   CPL A
   MOV 36H,A
   MOV A,35H       ;1秒
   INC A
   MOV 35H, A
   CJNE  A, #0AH, DONE
   MOV 35H, #00H
   MOV A,34H       ;10秒
   INC A
   MOV 34H, A
   CJNE  A, #06H, done
   MOV 34H, #00H
   MOV A,33H       ;分
   INC A
   MOV 33H, A
   CJNE  A, #0AH,DONE
   MOV 33H, #00H
   MOV A,32H       ;十分
   INC A
   MOV 32H, A
   CJNE  A, #06H, DONE
   MOV 32H, #00H
   MOV R0, #31H;时
   ACALL GIA1
   MOV R0, #30H;10时
   MOV A, @R0
   INC R0
   SWAP  A
   ADD A, @R0
   MOV 2DH, A
   CJNE  A, #24H, DONE
   CLR A
   MOV 30H, A
   MOV 31H, A
QC:;    CLR P3.0
DONE: NOP
   POP 83H
   POP 82H
   POP 0E0H
   POP 0D0H
   RETI

  X:  MOV R0, #3BH
   ACALL GIA1
   MOV R0, #3FH
   ACALL GIA1
   MOV R0,#37H    ;天
   MOV A, @R0
   INC A
   MOV @R0, A
   CJNE  A, #09H, XQ
   MOV A, #01H
   MOV @R0, A
XQ: CJNE  A, #07H, XQ1
   INC A
   MOV @R0, A
XQ1: nop
RHB:MOV R0, #47H
   ACALL GIA1
   MOV R0, #46H
   MOV A, @R0
   INC R0
   SWAP  A
   ADD A, @R0
   MOV 2BH, A
YHB:MOV R0, #44H
   MOV A, @R0
   INC R0
   SWAP  A
   ADD A, @R0
   MOV 2AH, A
   CJNE  A, #02H, XY
NHB:MOV R0,#42H
   MOV A, @R0
   INC R0
   SWAP  A
   ADD A, @R0
   MOV 0F0H, #04H
   DIV AB
   MOV A, 0F0H
   JNZ PY
   MOV A, 2BH
   CJNE  A, #30H, FH
   AJMP  QLFH
XY: MOV A, 2AH
   CJNE  A, #04H, XY1
   AJMP  01E4H
XY1:CJNE  A, #06H, XY2
   AJMP  XY4
XY2:CJNE  A, #09H, XY3
   AJMP  XY4
XY3:CJNE  A, #11H, DY
XY4:MOV A, 2BH
   CJNE  A, #31H, FH
   AJMP  QLFH
DY: MOV A, 2BH
   CJNE  A, #32H, FH
   AJMP  QLFH
PY: MOV A, 2BH
   CJNE  A, #29H, FH
  QLFH:LJMP  R
   NOP
   NOP
   NOP
FH: LJMP  SXI

JIAN: MOV A,R3
   DEC R3
   AJMP FHJ
JIAN2: MOV A,R3
   XRL A,#44H
   JNZ FHJ
   DEC R3
   DEC R3
   DEC R3
   DEC R3
FHJ:    RET
JIA1:    MOV A,R3
   INC R3
   AJMP JIA3
JIA2:    MOV A,R3
   XRL A,#3FH
   JNZ JIA3
   INC R3
   INC R3
   INC R3
   INC R3
JIA3:    RET
   ORG 0330H
  R:  MOV A, #01H
   MOV 47H, A
   MOV A, #00H
   MOV 46H, A
   MOV R0, #45H
   ACALL GIA1
   MOV A, 2AH
   CJNE  A, #12H, FH1
   MOV A, #01H
   MOV 45H, A
   MOV A, #00H
   MOV 44H, A
NJ1:MOV A, 2AH
   CJNE  A, #12H, FH1
   MOV A, 2BH
   CJNE  A, #32H, FH1
   MOV  R0, #43H
   ACALL GIA1
FH1:LJMP  DONE

   ORG 0360H
SXI:MOV R0, #47H
   MOV A, 2BH
   MOV R4, A
   ANL A, #0FH
   MOV @R0, A
   DEC R0
   MOV A, R4
   SWAP  A
   ANL A, #0FH
   MOV  @R0, A
   LJMP  DONE

   ORG 0380H

  DL:  MOV R0, #30H
   MOV A, @R0
   INC R0
   SWAP  A
   ADD A, @R0
   MOV 2DH, A
   MOV R0, #32H
   MOV A, @R0
   INC R0
   SWAP  A
   ADD  A, @R0
   MOV 29H, A
   MOV R4, #1BH
   MOV DPTR, #0500H
   MOV A, #00H
DL1:MOVC  A, @A+DPTR
   CJNE  A, 2DH, DL2
   INC DPTR
   MOV A,#00H
   MOVC  A, @A+DPTR
   CJNE  A, 29H, DL3
   AJMP DL4
DL2:INC DPTR
DL3:INC DPTR
   MOV A, #00H
   DJNZ  R4, DL1
   AJMP  DL5
DL4:SETB P2.0
   ACALL DELAY
DL5:RET
; 键盘扫描处理子程序
                ORG0400H
  JPCL: ORL  P3,#08H       ;因P3口复用,既作数码管的段选,又作遥控接收,
  JP: JNB  P3.3,YS2       ;为检测红外线接收头有无信号,必须使P3.3=1.
   clr p3.3
      AJMP J0       ;无信号输入转移
YS2:  ANL  P1,#00H       ;否则关显示,位选信号为0
      CLR A
      MOV 48H, A
      MOV R0,#48H       ;遥控数据存储指针
      MOV R6, #1EH
S0: MOV 8DH,#00H    ;定时器1时间常数
      MOV 8BH, #00H
S1: JB 0B3H,JP       ;若50微秒内P3.3变高则返回,正常解码信号持续低电平应大于50微秒.
      SETB TR1             ;是解码信号,准备启动定时器1(为高时启动),
S2: JNB 0B3H,S2    ;等待变高,如果是干扰信号,很快消失而变高.
S3:    MOV A,TH1    ;如果高电平持续时间太长,则是干扰信号,超过FE,则返回.
      XRL  A,#0FEH
      JZ J0
      JB 0B3H,S3       ;等待再次变低.
      CLR  TR1             ;再次变低后,高脉冲宽度测量完毕,应关闭定时器.
      MOV A,8DH       ;读数据
      JZ S4          ;译码
      MOV A, #80H
      ADD A, @R0
      MOV @R0, A
S4: MOV A, @R0
      RL A
      MOV @R0, A
      NOP
      DJNZ  R6, S0
      MOV A, 48H
      MOVC  A, @A+DPTR
      ANL A, #0FH
      MOV 2CH, A
      ACALL DELAY2
         ACALL DELAY2
         SETB  TR0
         SUBB A,#0AH
         JNCS5       ;是功能键转移
         MOV A,R3    ;是数字键写显示
         MOV R0, A
         MOV A, 2CH
         MOV @R0, A
         MOVR7,#00H    ;清闪动标志
         MOV 50H,#00H ;置确定标志，
         AJMP DIS
  S5: LJMP AN
      NOP
  JJ6:  JNB  0B1H, JJ6
      ACALL DELAY2
      MOV A, R3
      MOV R0, A
      MOVC  A, @A+DPTR
      XRL A, @R0
      JNZ J7
      AJMP  G1
  J7:  INC @R0
  G1:  CLR A
      MOV R7, A
      AJMP  J00
  J8:  JNB 0B2H, J8
      ACALL DELAY2
      MOV A, R3
      MOV R0, A
      MOV A, @R0
      XRL  A, #00H
      JNZ J9
      AJMP  G0
  J9:  DEC @R0
  G0:  CLR A
      MOV R7, A
      AJMP  J00
  J: JNB 0B4H, J
      ACALL DELAY2
      MOV A, #01H
      MOV R7, A
      MOV A, R3
      XRL A, #48H
      JNZ JJ4
      MOV R3, #2FH
  JJ4:  INC  R3
      MOV A, R3
      MOV R0, A
      MOV 2CH, @R0
  J00:  ACALL DELAY2
  J0:  CLR TR1
   SETB  TR0
  J01:  LJMP  SHAN
   ORG0500H       ;打铃时间
DB06,30H,06,00,06,15H,07,15H,07,40H,07,45H,08,30H,08,40H,09,25H
DB09,50H,10H,35H,10H,45H,11H,30H,12H,30H,13H,30H
DB13H,40H,13H,45H,14H,30H,14H,40H,15H,25H,16H,30H,17H,00H
DB18H,00,18H,45H,20H,20H,21H,00,21H,10H
   ORG 0550H
DB00,08,05,04,00,00,00,04;p2
DB00,00,00,01,00,00,00,01;p0
DB01,09,09,08,00,07,01,06;p3
      ORG 0600H
SIO: MOVA,#20H
   MOV R0,#20H
   MOV 89H,A
   MOV 8DH,#0F3H
   SETB 0BCH
   SETB 0AFH
   CLR 0ABH
   SETB 8EH
   SETB 0ACH
   MOV A,#50H
   MOV 98H,A
   RET
  SI: MOV DPTR,#0700H
   CLR 98H
   MOV A,99H
   MOVC A,@A+DPTR
   MOV R2,A
   MOV A,R7
   XRL A,#01H
   JZ  SI1
   MOV A,R2
   MOV @R0,A
   MOV R7,#01H
   AJMP SI2
SI1: MOVA,@R0
   SWAP A
   ADD A,R2
   MOV @R0,A
   INC R0
   MOV R7,#00H
SI2: RETI
  SO: CLR 99H
   MOV A,99H
   MOV @R0,A
   RETI
   ORG 0700H;数码管段编码
DB0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H,0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH
DB 8EH,0CEH,00
   ORG 0712H
DELAY:  MOV R5, #88H
DEL: NOP
      DJNZ  R5, DEL
      RET
DELAY1: MOV R6, #10H
DELA: ACALL DELAY
      DJNZ  R6, DELA
      RET
DELAY2: MOV R6, #0FFH
DE:    ACALL DELAY
      DJNZ  R6,DE
      RET
   ORG 0730H
DB00,01,02,03,04,05,06,07,08,09,09,09,09,09,09,09,02,0AH,0BH,0CH,0DH,0EH,0FH,09
   ORG 0748H
GIA1: MOV R1, #04H
GIA2: MOV A, @R0
GIA: INC A
      MOV @R0, A
      CJNE  A, #0AH, GIA3
      CLR A
      MOV @R0, A
      DEC R0
      DJNZ  R1, GIA2
GIA3: RET
   ORG 0761H
DB02H,00H, 00H,00H, 06H,0EH,00H, 0AH,04H,00H,0DH,00H,08H,00H,00H,00H
DB01H,00H, 09H,0BH,05H,00H,00H,00H,03H,00H,0CH,00H,07H,0FH
   ORG 07A0H
DB0AH,03H,00H,07H,09H,01H,0CH,05H,04H,0BH,08H,00H,02H,00H,06H,0DH
   ORG 07B0H
DB00H,07H,0AH,03H,0CH,05H,09H,01H,08H,00H,04H,0BH,06H,0DH,02H,00H
   ORG 07C0h
DD: MOV R2,#0FEH
   MOV R1,#0FEH
CC:  MOV A,R1
   MOV P1,A
   MOV P0,A
   MOV P3,A
   MOV A,R2
   MOV P2,A
   MOV R6,#50H
BB:  MOV R5,#0FFH
AA:NOP
   DJNZ R5,AA
   DJNZ R6,BB
   MOV A,R1
   RL A
   MOV R1,A
   JB 0E0H,CC
   MOV A,R2
   RL A
   MOV R2,A
   JNB 0E0H,CC
   RET
;读实时时钟实时数据寄存器子程序
;功能：从实时时钟读入当前时间数据                                     |
;入口：NONE
;出口：接收数据放在年、月、日、星期、时、分、秒各寄存器
;影响资源：A，R0,R3,TIMETX,TIMERX,YEAR,MONTH,DAY,WEEK,HOUR,MINUTE,SECOND |
READ_TIME:
RDTIME_LOOP:
   LCALL IICSTART
   JB    FLAG.1,ERR_IICSTOP    ;如SDA线被箝位为低电平则退出
   MOV    TIMETX,#65H          ;发送读时钟数据命令
   LCALL SENDH_L
   JB    FLAG.0,ERR_IICSTOP    ;ACK信号不正常则退出.
   MOV    R0,#YEAR
   MOV    R3,#07H
RDTIME1:
   LCALL RXL_H
   MOV    A,TIMERX
   MOV    @R0,A
   INC R0
   DJNZ    R3,RDTIME2          ;读完一个字节数据后确认数据传输
   JMP RDTIME3             ;若为最后一个字节数据则为NOACK
RDTIME2:
   CALL ACK
   JMP RDTIME1
RDTIME3:
   CALL NOACK
   LCALL IICSTOP
   CLR  HOUR.7 ;小时的最高位在24小时制时没有用,如果是12小时制请删掉此行.
RDTIME_RET:
   RET

ERR_IICSTOP:
   LCALL IICSTOP
   RET
ACK: CLR    TIMETEMP.1
   LCALL BITOUT
   RET
NOACK: SETB TIMETEMP.1
   LCALL BITOUT
   RET
;保存错误代码
;功能：保存MCU与IIC接口通信时的错误状态                               |
;入口：TIMETEMP.0=ACK位缙?                                           |
;出口：FLAG.0=错误代码                                                 |
ACK_ERR:
   JNB TIMETEMP.0,ACK_ERR_RET  ;检查ACK信号是否正常
   SETB FLAG.0                ;置ACK出错标志位
ACK_ERR_RET:
   RET
;启用IIC总线
;功能：开启实时时钟的IIC总线
;入口：NONE    出口：NONE
;影响资源：NONE
IICSTART:
   CLR FLAG.1
   SETB    SDA
   SETB    SCL
   LCALL DELAY3
   JB    SDA,IIC_SDAHI
   SETB FLAG.1
IIC_SDAHI:
   CLR SDA
   LCALL DELAY3
   CLR SCL
   LCALL DELAY3
   RET
;关闭IIC总线
;功能：关闭实时时钟IIC总线
;入口：NONE    出口：NONE
;影响资源：NONE
IICSTOP:CLR    SDA
   SETB    SCL
   LCALL DELAY3
   SETB    SDA
   LCALL DELAY3
   RET
;短延时子程序
;功能：延时       入口：NONE          出口：NONE
;影响资源：R7,PSW
DELAY3:  MOV R7,#05H             ;此延时至少10us,
DELAY5:    NOP
   DJNZ    R7,DELAY5
   RET

LONGDELAY:                   ;DELAY 300MS
   MOV R6,#240
LD0: MOV R7,#250    ;5*250*240
LD1: NOP
   NOP
   NOP
   DJNZ R7,LD1
   DJNZ R6,LD0
   RET
;发送一个字节，由高位到低位发送
;功能：从MCU发送一个字节给实时时钟,由高位到低位发送
;入口：发送数据放在TIMETX       出口：NONE
;影响资源：A，R2，TIMETX
SENDH_L:MOV A,TIMETX
   MOV    R2,#08H
   CLR FLAG.0
SENDH_L1:
   MOV    C,ACC.7
   MOV    TIMETEMP.1,C
         LCALL BITOUT
         RL A
         DJNZ    R2,SENDH_L1
   LCALL BITIN
   LCALL ACK_ERR
   RET
;发送一个字节，由低位到高位发送
;功能：从MCU发送一个字节给实时时钟,由低位到高位发送
;入口：发送数据放在TIMETX       出口：NONE
;影响资源：A，R2，TIMETX
SENDL_H:MOV A,TIMETX
      MOV    R2,#08H
   CLR FLAG.0
SENDL_H1:
   MOV    C,ACC.0
   MOV    TIMETEMP.1,C
   LCALL BITOUT
         RR A
         DJNZ    R2,SENDL_H1
   LCALL BITIN
   LCALL ACK_ERR
   RET
;接收一个字节
;功能：MCU从IIC总线接收一个字节,MSB在前,LSB在后
;入口：NONE       出口：接收数据放在RXBUF中
;影响资源：A，R2，TIMEBIT，RXBUF
RXH_L: MOV    R2,#08H
RXH_L1:LCALL BITIN
   MOV    C,TIMETEMP.0
   MOV    ACC.7,C
         RLC A
         DJNZ    R2,RXH_L1
   MOV TIMERX,A
   RET
;接收一个字节
;功能：MCU从IIC总线接收一个字节,LSB在前,MSB在后
;入口：NONE       出口：接收数据放在RXBUF中
;影响资源：A，R2，TIMEBIT，RXBUF
RXL_H: MOV    R2,#08H
RXL_H1:LCALL BITIN
   MOV    C,TIMETEMP.0
         RRC    A
         DJNZ    R2,RXL_H1
   MOV TIMERX,A
   RET
;送出一位数
;功能：从MCU发送一位数给实时时钟
;入口：发送位数放在EEPREM.1    出口：NONE
;影响资源：A，TIMETEMP
BITOUT:
   MOV    C,TIMETEMP.1
   MOV    SDA,C
   LCALL DELAY3
   SETB    SCL
   LCALL DELAY3
   CLR SCL
   LCALL DELAY3
   RET
;读入一位数
;功能：MCU从实时时钟接收一位数
;入口：NONE    出口：接收位数放在TIMETEMP.0
;影响资源：A，TIMETEMP
BITIN:
   SETB    SDA
   SETB SCL
         LCALL DELAY3
         MOV    C,SDA
   MOV    TIMETEMP.0,C
         CLR SCL
   CLR SDA
   LCALL DELAY3
   RET
   ORG 0900H
;状态异常处理程序
;功能：在干扰严重的情况下,时钟进入异常状态的处理
;入口：NONE       出口：NONE
;影响资源： A，TIMETX
TIME_TESTMODE:
TIME_TESTMODE_LOOP:
   LCALL IICSTART
   JNB FLAG.1,TIME_TESTMODE_1
   LJMP ERR_IICSTOP          ;SDA线被箝位为低电平则退出
TIME_TESTMODE_1:
         MOV    TIMETX,#6EH          ;发送测试模式结束命令,#6EH
         LCALL SENDH_L
   LCALL  IICSTOP             ;
   JB    FLAG.0,TIME_TESTMODE_LOOP;ACK信号不正常则重写.
                                    ;
   RET
;写状态寄存器程序
;功能：读/写实时时钟状态寄存器，对其进行设置
;入口：NONE       出口：NONE
;影响资源： A，TIMETX
TIMESTATUS_INT12:
   LCALL  IICSTART
   JNB FLAG.1,TIME_SETMODE_1
   LJMP ERR_IICSTOP          ;SDA线被箝位为低电平则退出
TIME_SETMODE_1:
         MOV    TIMETX,#62H          ;发送写时钟状态寄存器命令
         LCALL SENDH_L
   JNB FLAG.0,TIME_SETMODE_2
   LJMP ERR_IICSTOP          ;ACK信号不正常则退出?
TIME_SETMODE_2:
         MOV    TIMETX,#40H          ;24小时进制，
         LCALL  SENDL_H                ;关闭/INT1及/INT2脚的输出
   LCALL  IICSTOP             ;
   RET

END

ID:72088 · 发表于 2018-10-13 19:53

高人，比我厉害，我只会写时钟，简单的东西，汇编

ID:632961 · 发表于 2022-11-4 11:10

求电路原理图，求程序代码，

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LED数码管显示的电子表制作

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