;#################################################
;程序名称：可定时温湿控制器
;功能：实时检测温湿度并显示，并且控制相应的设备进行除湿、加湿、降温、加热。
;主控芯片：89c51，12MHZ
;程序编写者：buyixin（不亦心）
;编写时间：2009年
;注明：这里只给出草稿程序（仅用于仿真，商用需求请留言联系），并未优化，也去除了注释
;不亦心的博客：http://hi.baidu.com/不亦心/
;##################################################################
DQ EQU P1.0 ;单总线
SHEZHI EQU P1.1 ;设置温度，湿度，时间
JIA EQU P1.2 ;加键
JIAN EQU P1.3 ;减键
MSURE EQU P1.4 ;确认键
SHEZHI1 EQU P1.5 ;调整时间键
IN555 EQU P1.6 ;触发555信号
OUT555 EQU P1.7 ;单稳态电路输入端
JIANGWEN EQU P3.0
JIARE EQU P3.1
CHUSHI EQU P3.6
JIASHI EQU P3.7
ANJIAN1 BIT 20H.0 ;设置键标志位
ANJIAN2 BIT 20H.1 ;加键标志位
ANJIAN3 BIT 20H.2 ;减键标志位
ANJIAN4 BIT 20H.3 ;确认键标志位
ANJIAN5 BIT 20H.4 ;切换键标志位
ANJIAN6 BIT 20H.5 ;调整时间标志位
SHAN BIT 20H.6 ;设置秒闪标志
BT0 BIT 20H.7 ;调时秒闪标志
HOUR DATA 6DH ;小时单元
MINUTE DATA 6EH ;分单元
SECOND DATA 6FH ;秒单元
TIMEH DATA 5EH ;定时小时单元
TIMEL DATA 5FH ;定时分单元
TIME DATA 7BH ;计时器1中断计数位
TEMPH DATA 7CH ; 定温度高限单元
TEMPL DATA 7DH ; 定温度低限单元
SHIH DATA 7EH ; 定湿度高限单元
SHIL DATA 7FH ; 定湿度低限单元
ORG 0000H
SJMP START
ORG 0003H
LJMP INTR0
ORG 000BH
LJMP INTIME
ORG 0013H
LJMP INTR1
ORG 30H
START: SETB JIANGWEN ;置1设备控制口
SETB JIARE
SETB CHUSHI
SETB JIASHI
MOV TMOD,#11H ;定时器初始化
MOV TL1,#0B4H
MOV TH1,#3CH
MOV TL0,#0B4H
MOV TH0,#3CH
SETB PT0 ;定时器0高级中断
SETB IT1 ;外部中断采用边沿触发
SETB IT0
SETB EA ;开中断
SETB EX0
SETB EX1
SETB ET0
MOV SP,#30H ;设置堆栈指针
MOV HOUR,#00H ;清零各数据缓存区
MOV MINUTE,#00H
MOV SECOND,#00H
MOV 70H,#00H
MOV 71H,#00H
MOV 72H,#00H
MOV 73H,#00H
MOV 74H,#00H
MOV 75H,#00H
MOV 76H,#00H
MOV 77H,#00H
MOV TEMPH,#1CH ;初始化温，湿，时间的设定值
MOV TEMPL,#00H
MOV SHIH,#3CH
MOV SHIL,#1EH
MOV TIMEH,#11H
MOV TIMEL,#1EH
LCALL DS18B20 ;调用温度传感器初始化子程序
MAIN: LCALL DISPLAY ;调用温度显示子程序
LCALL REDTEMP ;调用读取温度子程序
LCALL DATAC ;调用数据处理子程序
LCALL BCD ;转化为BCD侣?
MOV R1,#0FH ;把温度显示嵌入延时程序，防止显示有闪烁感
DEL02: MOV R7,#7DH
DEL12: MOV R6,#0C6H
LCALL DISPLAY
DEL22: DJNZ R6,DEL22
DJNZ R7,DEL12
DJNZ R1,DEL02
CLR C ;把温度值与设定值比较
MOV A,61H
CJNE A,TEMPH,BIJIAO2
CLR JIANGWEN
BIJIAO2: SETB JIARE
JC JIAR
CLR JIANGWEN
SJMP OUT2
JIAR: SETB JIANGWEN
CJNE A,TEMPL,BIJIAO3
CLR JIARE
SJMP OUT2
BIJIAO3: JNC OUT2
CLR JIARE
OUT2:LCALL SHIDU ;调用湿度检测子程序
MOV R1,#20H ;把湿度显示嵌入循环体，显示
DEL01: MOV R7,#7DH
DEL11: MOV R6,#0C6H
LCALL DISPLAY2
DEL21: DJNZ R6,DEL21
DJNZ R7,DEL11
DJNZ R1,DEL01
SJMP MAIN
;温度检测相关子程序
;初始化温度传感器子程序
DS18B20: LCALL RESET ;调用DS18B20复位子程序
MOV A,#0CCH ;跳过ROM
LCALL WRITE ;调用ds18b20子程序
MOV A,#4EH ;写Ds18b20存储器
LCALL WRITE
MOV A,#00H ;写温度上限
LCALL WRITE
MOV A,#00H
LCALL WRITE
MOV A,#7FH ;设置精度12位，精确的0.0625度
LCALL WRITE
RET
;读取温度子程序
REDTEMP: LCALL RESET
MOV A,#0CCH
LCALL WRITE
MOV A,#44H
LCALL WRITE
LCALL DELAY750 ;延迟750毫秒，12位温度转化需750毫秒
LCALL RESET
MOV A,#0CCH
LCALL WRITE
MOV A,#0BEH ;读命令
LCALL WRITE
LCALL READ
MOV 66H,65H ;温度低字节
LCALL READ
MOV 67H,65H ;温度高字节
RET
;温度显示子程序
DISPLAY: MOV R0,#71H
MOV R3,#0FDH
MOV A,R3
DIR0: MOV P2,A
MOV A,@R0
CJNE R0,#73H,MM
MOV DPTR,#DEG2
MOVC A,@A+DPTR
SJMP TT
MM: MOV DPTR,#DEG1
MOVC A,@A+DPTR
TT: MOV P0,A
MOV R5,#02H
DELAY: MOV R4,#0FFH
DJNZ R4,$
DJNZ R5,DELAY
INC R0
MOV A,R3
JNB ACC.7,DIR1
RL A
MOV R3,A
SJMP DIR0
DIR1: RET
DEG1: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,40H,00H,76H,38H,39H,77H ;徊幌允拘∈ 阕中吐?
DEG2: DB 0BFH,86H,0DBH,0CFH,0E6H,0EDH,0FDH,87H,0FFH,0EFH,40H,00H;幌允拘∈ ?
;数据显示子程序
;温度的存放方式：小数部分从左到右依次是2的负一次方到负二次方
;符号位1111为负，0000为正。负数 要取反加1
;负号用#0ＡＨ，整数用＃０ＢＨ对应的字型码
;皇 忠 艘?.0625转化，但汇编没有浮点数所以采取以下转化方式：整数部分把两个半
;蛔纸诤显谝豢榫托辛耍 ∈ 糠忠 捎眉臃ㄖ噶睿 ?101就这样：0.5+0.25+0+0.0625
;整数低字节 整数低字节 整数低字节 整数低字节 小数 小数 小数 小数
;符号 符号 符号 符号 符号 整数高字节 整数高字节 整数高字节
DATAC: MOV A,66H
ANL A,#0fh
MOV 60H,A ;徽馐侨⌒∈ 糠址旁?0H
MOV A,66H
SWAP A
ANL A,#0FH
MOV R4,A
MOV A,67H
SWAP A
ANL A,#0FH
MOV 62H,A ;环 盼淮嬗?2?
MOV A,67H
SWAP A
ANL A,#0F0H
ORL A,R4
MOV 61H,A
MOV A,62H
CJNE A,#0FH,EE;患觳馐欠裎 盼?
MOV 70H,#0AH ;皇歉海 罚埃人停＃癆H表负，其他取反加1
MOV A,60H
CPL A
ADD A,#01H
MOV 60H,A
MOV A,61H
CPL A
ADDC A,#00H
MOV 61H,A
SJMP FF
EE: MOV 70H,#0BH ;徽 蝗》矗 ?0bh表正
FF: MOV 77H,#00H
MOV 76H,#00H
MOV 75H,#00H
MOV 74H,#00H
CLR C
MOV A,60H
JB ACC.0,Z1 ;小数部分乘以0.0625转化成显示温度值，用加法实现显示小数
AA: JB ACC.1,Z2
BB: JB ACC.2,Z3
CC: JB ACC.3,Z4
SJMP DD
Z1: MOV 77H,#05H
MOV 76H,#02H
MOV 75H,#06H
MOV 74H,#00H
SJMP AA
Z2: MOV A,#05H
ADD A,76H
MOV 76H,A
MOV A,#02H
ADD A,75H
MOV 75H,A
MOV A,#01H
ADD A,74H
MOV 74H,A
MOV A,60H
SJMP BB
Z3: MOV A,#05H
ADD A,75H
MOV 75H,A
MOV A,#02H
ADD A,74H
MOV 74H,A
MOV A,60H
SJMP CC
Z4: MOV A,#05H
ADD A,74H
MOV 74H,A
DD: MOV A,75H
MOV B,#0AH
DIV AB
MOV 75H,B
ADD A,74H
MOV 74H,A
RET
;蛔 怀桑拢茫穆耄 饕 乐挂?开头的数字这样不符合习惯的表示方法
;桓菏 允靖悍 牛 苯尤梅 攀 牍芪幻鸩涣?
BCD: MOV A,61H
MOV B,#64H
DIV AB
MOV 71H,A ;话傥凰停罚保?
MOV A,B
MOV B,#0AH
DIV AB
MOV 72H,A ;十位
MOV 73H,B ;桓鑫?
MOV A,71H
CJNE A,#00H,GG ;环乐钩鱿郑?-００１.０１２５"这样显示，纠正为"－０.０１２５"
MOV A,72H
CJNE A,#00H,HH
MOV 72H,70H
MOV 71H,#0BH
SJMP GG
HH: MOV 71H,70H
GG: RET
;桓次蛔映绦颍 ㄐ判 樾吹模ㄊ樯系模?
RESET: NOP
L0: CLR DQ
MOV R6,#0A0H
L1: NOP
DJNZ R6,L1
SETB DQ
MOV R6,#14H
L4: DJNZ R6,L4
CLR C
ORL C,DQ
JC L3
MOV R5,#1EH
L5: ORL C,DQ
JC L3
DJNZ R5,L5
SJMP L0
L3: MOV R6,#78H
L2: DJNZ R6,L2
RET
;欢磷映绦颍 ㄐ判 椋ㄊ樯系模?
READ: MOV R6,#08H
RE1: CLR DQ
MOV R4,#04H
NOP
SETB DQ
RE2: DJNZ R4,RE2
MOV C,DQ
RRC A
MOV R5,#16H
NOP
RE3: DJNZ R5,RE3
DJNZ R6,RE1
MOV 65H,A
SETB DQ
RET
;恍醋映绦颍 ㄐ判 椋ㄊ樯系模?
WRITE: MOV R5,#08H
W1: SETB DQ
MOV R4,#06H
RRC A
CLR DQ
W2: DJNZ R4,W2
MOV DQ,C
MOV R4,#16H
NOP
W3: DJNZ R4,W3
DJNZ R5,W1
SETB DQ
RET
;谎邮弊映绦?
DELAY750:MOV R1,#0FH
DEL0: MOV R7,#7DH
DEL1: MOV R6,#0C6H
LCALL DISPLAY
DEL2: DJNZ R6,DEL2
DJNZ R7,DEL1
DJNZ R1,DEL0
RET
INTR0: PUSH ACC
MOV 7AH,R2
PUSH 7AH
CLR EX0
SETB TR1
LOOP: JNB TF1,LOOP1
INC TIME
CLR TF1
MOV TL1,#0B4H
MOV TH1,#3CH
MOV A,TIME
CJNE A,#20H,LOOP1
MOV TIME,#00H
CPL SHAN
LOOP1: JB SHEZHI,TAIQI
JB ANJIAN1,TAIQI
SETB ANJIAN1
INC R2
CJNE R2,#07H,TAIQI
MOV R2,#01H
TAIQI: JNB SHEZHI,PAN1
CLR ANJIAN1
PAN1: JB JIA,TAIQI2
JB ANJIAN2,TAIQI2
SETB ANJIAN2
CJNE R2,#00H,JIATEMPL
LJMP TAIQI2
JIATEMPL:CJNE R2,#01H,JIATEMPH
INC TEMPL
LJMP TAIQI2
JIATEMPH: CJNE R2,#02H,JIASHIL
INC TEMPH
LJMP TAIQI2
JIASHIL: CJNE R2,#03H,JIASHIH
INC SHIL
LJMP TAIQI2
JIASHIH: CJNE R2,#04H,JIADHOUR
INC SHIH
JIADHOUR: CJNE R2,#05H,JIADMINUTE
INC TIMEL
LJMP TAIQI2
JIADMINUTE: CJNE R2,#06H,TAIQI2
INC TIMEH
TAIQI2: JNB JIA,PAN2
CLR ANJIAN2
PAN2: JB JIAN,TAIQI3
JB ANJIAN3,TAIQI3
SETB ANJIAN3
CJNE R2,#00H,JIANTEMPL
LJMP TAIQI3
JIANTEMPL: CJNE R2,#01H,JIANTEMPH
DEC TEMPL
LJMP TAIQI3
JIANTEMPH: CJNE R2,#02H,JIANSHIL
DEC TEMPH
LJMP TAIQI3
JIANSHIL: CJNE R2,#03H,JIANSHIH
DEC SHIL
LJMP TAIQI3
JIANSHIH: CJNE R2,#04H,JIANDHOUR
DEC SHIH
JIANDHOUR: CJNE R2,#05,JIANDMINUTE
DEC TIMEH
LJMP TAIQI3
JIANDMINUTE: CJNE R2,#06,TAIQI3
DEC TIMEL
TAIQI3: JNB JIAN,PAN3
CLR ANJIAN3
PAN3: CJNE R2,#01H,PP
LCALL DISTEMP
SJMP QQ
PP: CJNE R2,#02H,YY
LCALL DISTEMP
SJMP QQ
YY: CJNE R2,#03H,VV
LCALL DISSHI
SJMP QQ
VV: CJNE R2,#04H,LL
LCALL DISSHI
SJMP QQ
LL: CJNE R2,#05H,LJ
LCALL DISTIME
SJMP QQ
LJ: CJNE R2,#06H,QQ
LCALL DISTIME
QQ: JB MSURE,TAIQI4
JB ANJIAN4,TAIQI4
SETB ANJIAN4
SJMP OUT
TAIQI4: JNB MSURE,OUT
CLR ANJIAN4
LJMP LOOP
OUT: SETB EX0
CLR TR1
POP 7AH
MOV R2,7AH
POP ACC
RETI
DISTEMP: MOV A,TEMPH
MOV B,#0AH
DIV AB
MOV DPTR,#DEG1
MOVC A,@A+DPTR
CJNE R2,#02H,ZC
JB SHAN,SS
ZC:CLR P2.0
MOV P0,A
SS: LCALL DELAY1
SETB P2.0
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#02H,ZC1
JB SHAN,SS1
ZC1: CLR P2.1
MOV P0,A
SS1: LCALL DELAY1
SETB P2.1
MOV A,#0CH
CLR P2.2
MOVC A,@A+DPTR
MOV P0,A
LCALL DELAY1
SETB P2.2
MOV A,TEMPL
MOV B,#0AH
DIV AB
MOVC A,@A+DPTR
CJNE R2,#01H,ZC2
JB SHAN,SS2
ZC2: CLR P2.4
MOV P0,A
SS2: LCALL DELAY1
SETB P2.4
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#01H,ZC3
JB SHAN,SS3
ZC3: CLR P2.5
MOV P0,A
SS3: LCALL DELAY1
SETB P2.5
MOV A,#0DH
MOVC A,@A+DPTR
CLR P2.6
MOV P0,A
LCALL DELAY1
SETB P2.6
MOV A,#0EH
MOVC A,@A+DPTR
CLR P2.7
MOV P0,A
LCALL DELAY1
SETB P2.7
RET
DISSHI: MOV A,SHIH
MOV B,#0AH
DIV AB
MOV DPTR,#DEG1
MOVC A,@A+DPTR
CJNE R2,#04H,ZC4
JB SHAN,SS4
ZC4: CLR P2.0
MOV P0,A
SS4: LCALL DELAY1
SETB P2.0
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#04H,ZC5
JB SHAN,SS5
ZC5: CLR P2.1
MOV P0,A
SS5: LCALL DELAY1
SETB P2.1
MOV A,#0CH
MOVC A,@A+DPTR
CLR P2.2
MOV P0,A
LCALL DELAY1
SETB P2.2
MOV A,SHIL
MOV B,#0AH
DIV AB
MOVC A,@A+DPTR
CJNE R2,#03H,ZC6
JB SHAN,SS6
ZC6: CLR P2.4
MOV P0,A
SS6: LCALL DELAY1
SETB P2.4
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#03H,ZC7
JB SHAN,SS7
ZC7: CLR P2.5
MOV P0,A
SS7: LCALL DELAY1
SETB P2.5
MOV A,#0DH
MOVC A,@A+DPTR
CLR P2.6
MOV P0,A
LCALL DELAY1
SETB P2.6
MOV A,#0FH
MOVC A,@A+DPTR
CLR P2.7
MOV P0,A
LCALL DELAY1
SETB P2.7
RET
DISTIME: MOV A,TIMEH
MOV B,#0AH
DIV AB
MOV DPTR,#DEG1
MOVC A,@A+DPTR
CJNE R2,#06H,ZC4T
JB SHAN,SS4T
ZC4T: CLR P2.0
MOV P0,A
SS4T: LCALL DELAY1
SETB P2.0
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#06H,ZC5T
JB SHAN,SS5T
ZC5T: CLR P2.1
MOV P0,A
SS5T: LCALL DELAY1
SETB P2.1
MOV A,#0CH
MOVC A,@A+DPTR
CLR P2.2
MOV P0,A
LCALL DELAY1
SETB P2.2
MOV A,TIMEL
MOV B,#0AH
DIV AB
MOVC A,@A+DPTR
CJNE R2,#05H,ZC6T
JB SHAN,SS6T
ZC6T: CLR P2.4
MOV P0,A
SS6T: LCALL DELAY1
SETB P2.4
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#05H,ZC7T
JB SHAN,SS7T
ZC7T: CLR P2.5
MOV P0,A
SS7T: LCALL DELAY1
SETB P2.5
MOV A,#0DH
MOVC A,@A+DPTR
CLR P2.6
MOV P0,A
LCALL DELAY1
SETB P2.6
MOV A,#08H
MOVC A,@A+DPTR
CLR P2.7
MOV P0,A
LCALL DELAY1
SETB P2.7
RET
SHIDU: MOV TH0,#00H
MOV TL0,#00H
CLR IN555
SETB TR0
SETB IN555
JB OUT555,$
MOV A,TL0
CLR TR0
CLR C
SUBB A,#18H
SUBB A,#1FH
MOV B,#02H
DIV AB
MOV 50H,A
MOV B,#0AH
DIV AB
MOV 6AH,A
MOV 6BH,B
RET
DISPLAY2: MOV A,6AH
MOV DPTR,#DEG1
MOVC A,@A+DPTR
CLR P2.4
MOV P0,A
LCALL DELAY1
SETB P2.4
MOV A,6BH
MOVC A,@A+DPTR
CLR P2.5
MOV P0,A
LCALL DELAY1
SETB P2.5
MOV A,#0FH
MOVC A,@A+DPTR
CLR P2.6
MOV P0,A
LCALL DELAY1
SETB P2.6
MOV A,#0CH
MOVC A,@A+DPTR
CLR P2.7
MOV P0,A
LCALL DELAY1
SETB P2.7
CLR C
MOV A,50H
CJNE A,SHIH,BIJIAO
CLR CHUSHI
BIJIAO: SETB JIASHI
JC JIAS
CLR CHUSHI
SJMP OUT1
JIAS: SETB CHUSHI
CJNE A,SHIL,BIJIAO1
CLR JIASHI
SJMP OUT1
BIJIAO1: JNC OUT1
CLR JIASHI
OUT1: RET
INTR1: SETB TR0
MOV 55H,R3
PUSH 55H
PUSH PSW
MOV 68H,R0
PUSH 68H
MOV R0,#00H
MOV 69H,R2
PUSH 69H
PUSH ACC
LOP: LCALL JIANPAN
LCALL JISUAN
LCALL DISPLAY1
MOV A,HOUR
CJNE A,TIMEH,OUTL
MOV A,MINUTE
CJNE A,TIMEL,OUTL
SJMP OVER
OUTL: LJMP LOP
OVER: POP ACC
POP 69H
MOV R2,69H
POP 68H
MOV R0,68H
POP PSW
POP 55H
MOV R3,55H
MOV HOUR,#00H
MOV MINUTE,#00H
MOV SECOND,#00H
RETI
INTIME: MOV TL0,#0B4H
MOV TH0,#3CH
PUSH ACC
LCALL JIANPAN
INC R0
POP ACC
RETI
JISUAN: CJNE R0,#20H,TIAOCHU
MOV R0,#00H
CPL BT0
INC SECOND
MOV A,SECOND
CJNE A,#3CH,TIAOCHU
MOV SECOND,#00H
INC MINUTE
MOV A,MINUTE
CJNE A,#3CH,TIAOCHU
MOV MINUTE,#00H
INC HOUR
MOV A,HOUR
CJNE A,#18H,TIAOCHU
MOV MINUTE,#00H
TIAOCHU: RET
DISPLAY1: MOV P2,#0FFH
MOV A,HOUR
CJNE A,#09H,XV
SJMP VX
XV: JC VX
MOV B,#0AH
DIV AB
SJMP ZV
VX: MOV A,#0BH
MOV B,HOUR
SJMP ZV
ZV: MOV DPTR,#DEG1
MOVC A,@A+DPTR
SHANSHUO: CJNE R2,#01H,ZC_1
JB BT0,SS_1
ZC_1: CLR P2.2
MOV P0,A
SS_1: LCALL DELAY1
SETB P2.2
MOV A,B
MOV DPTR,#DEG2
MOVC A,@A+DPTR
CJNE R2,#01H,ZC_2
JB BT0,SS_2
ZC_2: CLR P2.3
MOV P0,A
SS_2: LCALL DELAY1
SETB P2.3
MOV A,MINUTE
MOV B,#0AH
DIV AB
MOV DPTR,#DEG1
MOVC A,@A+DPTR
CJNE R2,#02H,ZC_3
JB BT0,SS_3
ZC_3: CLR P2.4
MOV P0,A
SS_3: LCALL DELAY1
SETB P2.4
MOV A,B
MOV DPTR,#DEG2
MOVC A,@A+DPTR
CJNE R2,#02H,ZC_4
JB BT0,SS_4
ZC_4: CLR P2.5
MOV P0,A
SS_4: LCALL DELAY1
SETB P2.5
MOV A,SECOND
MOV B,#0AH
DIV AB
MOV DPTR,#DEG1
MOVC A,@A+DPTR
CJNE R2,#03H,ZC_5
JB BT0,SS_5
ZC_5: CLR P2.6
MOV P0,A
SS_5: LCALL DELAY1
SETB P2.6
MOV A,B
MOVC A,@A+DPTR
CJNE R2,#03H,ZC_6
JB BT0,SS_6
ZC_6: CLR P2.7
MOV P0,A
SS_6: LCALL DELAY1
SETB P2.7
RET
;键判子程序
JIANPAN: JB SHEZHI1,TAIQI_
JB ANJIAN6,TAIQI_
SETB ANJIAN6
INC R2
CJNE R2,#03H,TAIQI_
MOV R2,#01H
TAIQI_: JNB SHEZHI1,PAN1_
CLR ANJIAN6
PAN1_: JB JIA,TAIQI2_
JB ANJIAN2,TAIQI2_
SETB ANJIAN2
CJNE R2,#00H,JIAHOUR
LJMP TAIQI2_
JIAHOUR:CJNE R2,#01H,JIAMINUTE
INC HOUR
LJMP TAIQI2_
JIAMINUTE: CJNE R2,#02H,TAIQI2_
INC MINUTE
TAIQI2_: JNB JIA,PAN2_
CLR ANJIAN2
PAN2_: JB JIAN,TAIQI3_
JB ANJIAN3,TAIQI3_
SETB ANJIAN3
CJNE R2,#00H,JIANHOUR
LJMP TAIQI3_
JIANHOUR: CJNE R2,#01H,JIANMINUTE
DEC HOUR
LJMP TAIQI3_
JIANMINUTE: CJNE R2,#02H,TAIQI3_
DEC MINUTE
TAIQI3_: JNB JIAN,PAN3_
CLR ANJIAN3
PAN3_: JB MSURE,TAIQI4_
JB ANJIAN4,TAIQI4_
SETB ANJIAN4
MOV R2,#00H
TAIQI4_: JNB MSURE,OUT_
CLR ANJIAN4
OUT_: RET
DELAY1: MOV R5,#02H
DL: MOV R4,#0FFH
DJNZ R4,$
DJNZ R5,DL
RET
END