CLR?P3.7
MAIN:MOV?38H,#00H
MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER? LCALL?TEMPRRO MOV?P2,#06H LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER2? LCALL?TEMPRRO MOV?P2,#5BH LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER3 LCALL?TEMPRRO MOV?P2,#4FH LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER4 LCALL?TEMPRRO MOV?P2,#66H LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER5 LCALL?TEMPRRO MOV?P2,#6DH LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER6 LCALL?TEMPRRO MOV?P2,#7DH LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER7 LCALL?TEMPRRO MOV?P2,#07H LCALL?PRO;------------------------------------------------------
MOV?38H,#00H MOV?39H,#00H MOV?3AH,#00H MOV?3BH,#00H LCALL?GET_TEMPER8 LCALL?TEMPRRO MOV?P2,#7FH LCALL?PROLJMPMAIN
;==============================================CHL1
GET_TEMPER:?
SETBP1.0H?;?定時入口?
BCD:LCALL?INIT_1820?
JB00H,S22?
LJMPBCD?;?若DS18B20不存在則返回?
S22:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_1820?MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_1820?
NOP?
LCALL?DELAY1?
CBA:LCALL?INIT_1820?
JB?00H,ABC?
LJMP?CBA?
ABC:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_1820?
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_1820?
LCALL?READ_18200?;READ_1820?
RET?
;==============================
READ_1820:?
MOV?R2,#8?
RE1:?
CLR?C?
SETB?P1.0H?
NOP?
NOP?
CLR?P1.0H?
NOP?
NOP?
NOP?
SETB?P1.0H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.0H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE1?
RET?
;=============================
WRITE_1820:?
MOV?R2,#8?
CLR?C?
WR1:?
CLR?P1.0H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.0H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.0H?
NOP?
DJNZ?R2,WR1?
SETB?P1.0H?
RET
;=======================================
READ_18200:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE00:?
MOV?R2,#8?
RE01:?
CLR?C?
SETB?P1.0H?
NOP?
NOP?
CLR?P1.0H?
NOP?
NOP?
NOP?
SETB?P1.0H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.0H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE01?
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE00?
RET?
;=======================================
INIT_1820:?
SETB?P1.0H?
NOP?
CLR?P1.0H?
MOV?R0,#250
TSR1:?
DJNZ?R0,TSR1?;?延時520us?
SETB?P1.0H?
MOV?R0,#25H?;96US-25H?
TSR2:?
DJNZ?R0,TSR2?
JNB?P1.0H,TSR3;如D0為低則復位成功，DS18B20存在?
LJMP?TSR4?;?延時?
TSR3:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR5?
TSR4:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR7?
TSR5:?
MOV?R0,#06BH?;200US?
TSR6:?
DJNZ?R0,TSR6?;?延時?
TSR7:?
SETB?P1.0H?;拉高總線
RET
;===============================?
GET_TEMPER2:?
SETBP1.1H?;?定時入口?
BCD2:LCALL?INIT_18202?
JB00H,S222?
LJMPBCD2?;?若DS18B20不存在則返回?
S222:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18202?MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18202?
NOP?
LCALL?DELAY1?
CBA2:LCALL?INIT_18202?
JB?00H,ABC2?
LJMP?CBA2?
ABC2:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18202?
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18202?
LCALL?READ_182002?;READ_1820?
RET?
;==============================
READ_18202:?
MOV?R2,#8?
RE12:?
CLR?C?
SETB?P1.1H?
NOP?
NOP?
CLR?P1.1H?
NOP?
NOP?
NOP?
SETB?P1.1H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.1H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE12?
RET?
;=============================
WRITE_18202:?
MOV?R2,#8?
CLR?C?
WR12:?
CLR?P1.1H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.1H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.1H?
NOP?
DJNZ?R2,WR12?
SETB?P1.1H?
RET
;=======================================
READ_182002:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE002:?
MOV?R2,#8?
RE012:?
CLR?C?
SETB?P1.1H?
NOP?
NOP?
CLR?P1.1H?
NOP?
NOP?
NOP?
SETB?P1.1H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.1H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE012?
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE002?
RET?
;=======================================
INIT_18202:?
SETB?P1.1H?
NOP?
CLR?P1.1H?
MOV?R0,#250
TSR12:?
DJNZ?R0,TSR12?;?延時520us?
SETB?P1.1H?
MOV?R0,#25H?;96US-25H?
TSR22:?
DJNZ?R0,TSR22?
JNB?P1.1H,TSR32;如D0為低則復位成功，DS18B20存在?
LJMP?TSR42?;?延時?
TSR32:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR52?
TSR42:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR72?
TSR52:?
MOV?R0,#06BH?;200US?
TSR62:?
DJNZ?R0,TSR62?;?延時?
TSR72:?
SETB?P1.1H?;拉高總線
RET
;===============================?
GET_TEMPER3:?
SETBP1.2H?;?定時入口?
BCD3:LCALL?INIT_18203?
JB00H,S223?
LJMPBCD3?;?若DS18B20不存在則返回?
S223:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18203MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18203
NOP?
LCALL?DELAY1?
CBA3:LCALL?INIT_18203
JB?00H,ABC3?
LJMP?CBA3
ABC3:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18203
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18203
LCALL?READ_182003?;READ_1820?
RET?
;==============================
READ_18203:?
MOV?R2,#8?
RE13:?
CLR?C?
SETB?P1.2H?
NOP?
NOP?
CLR?P1.2H?
NOP?
NOP?
NOP?
SETB?P1.2H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.2H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE13
RET?
;=============================
WRITE_18203:?
MOV?R2,#8?
CLR?C?
WR13:?
CLR?P1.2H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.2H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.2H?
NOP?
DJNZ?R2,WR13
SETB?P1.2H?
RET
;=======================================
READ_182003:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE003:?
MOV?R2,#8?
RE013:?
CLR?C?
SETB?P1.2H?
NOP?
NOP?
CLR?P1.2H?
NOP?
NOP?
NOP?
SETB?P1.2H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.2H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE013
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE003?
RET?
;=======================================
INIT_18203:?
SETB?P1.2H?
NOP?
CLR?P1.2H?
MOV?R0,#250
TSR13:?
DJNZ?R0,TSR13?;?延時520us?
SETB?P1.2H?
MOV?R0,#25H?;96US-25H?
TSR23:?
DJNZ?R0,TSR23?
JNB?P1.2H,TSR33;如D0為低則復位成功，DS18B20存在?
LJMP?TSR43?;?延時?
TSR33:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR53?
TSR43:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR73
TSR53:?
MOV?R0,#06BH?;200US?
TSR63:?
DJNZ?R0,TSR63?;?延時?
TSR73:?
SETB?P1.2H?;拉高總線
RET
;===============================?
GET_TEMPER4:?
SETBP1.3H?;?定時入口?
BCD4:LCALL?INIT_18204
JB00H,S224?
LJMPBCD4?;?若DS18B20不存在則返回?
S224:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18204MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18204
NOP?
LCALL?DELAY1?
CBA4:LCALL?INIT_18204
JB?00H,ABC4
LJMP?CBA4
ABC4:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18204
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18204
LCALL?READ_182004?;READ_1820?
RET?
;==============================
READ_18204:?
MOV?R2,#8?
RE14:?
CLR?C?
SETB?P1.3H?
NOP?
NOP?
CLR?P1.3H?
NOP?
NOP?
NOP?
SETB?P1.3H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.3H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE14
RET?
;=============================
WRITE_18204:?
MOV?R2,#8?
CLR?C?
WR14:?
CLR?P1.3H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.3H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.3H?
NOP?
DJNZ?R2,WR14
SETB?P1.3H?
RET
;=======================================
READ_182004:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE004:?
MOV?R2,#8?
RE014:?
CLR?C?
SETB?P1.3H?
NOP?
NOP?
CLR?P1.3H?
NOP?
NOP?
NOP?
SETB?P1.3H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.3H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE014
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE004
RET?
;=======================================
INIT_18204:?
SETB?P1.3H?
NOP?
CLR?P1.3H?
MOV?R0,#250
TSR14:?
DJNZ?R0,TSR14?;?延時520us?
SETB?P1.3H?
MOV?R0,#25H?;96US-25H?
TSR24:?
DJNZ?R0,TSR24
JNB?P1.3H,TSR34;如D0為低則復位成功，DS18B20存在?
LJMP?TSR44?;?延時?
TSR34:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR54?
TSR44:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR74
TSR54:?
MOV?R0,#06BH?;200US?
TSR64:?
DJNZ?R0,TSR64?;?延時?
TSR74:?
SETB?P1.3H?;拉高總線
RET
;===============================?
GET_TEMPER5:?
SETBP1.4H?;?定時入口?
BCD5:LCALL?INIT_18205
JB00H,S225
LJMPBCD5?;?若DS18B20不存在則返回?
S225:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18205MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18205
NOP?
LCALL?DELAY1?
CBA5:LCALL?INIT_18205
JB?00H,ABC5
LJMP?CBA5
ABC5:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18205
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18205
LCALL?READ_182005?;READ_1820?
RET?
;==============================
READ_18205:?
MOV?R2,#8?
RE15:?
CLR?C?
SETB?P1.4H?
NOP?
NOP?
CLR?P1.4H?
NOP?
NOP?
NOP?
SETB?P1.4H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.4H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE15
RET?
;=============================
WRITE_18205:?
MOV?R2,#8?
CLR?C?
WR15:?
CLR?P1.4H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.4H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.4H?
NOP?
DJNZ?R2,WR15
SETB?P1.4H?
RET
;=======================================
READ_182005:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE005:?
MOV?R2,#8?
RE015:?
CLR?C?
SETB?P1.4H?
NOP?
NOP?
CLR?P1.4H?
NOP?
NOP?
NOP?
SETB?P1.4H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.4H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE015
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE005
RET?
;=======================================
INIT_18205:?
SETB?P1.4H?
NOP?
CLR?P1.4H?
MOV?R0,#250
TSR15:?
DJNZ?R0,TSR15?;?延時520us?
SETB?P1.4H?
MOV?R0,#25H?;96US-25H?
TSR25:?
DJNZ?R0,TSR25
JNB?P1.4H,TSR35;如D0為低則復位成功，DS18B20存在?
LJMP?TSR45?;?延時?
TSR35:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR55?
TSR45:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR75
TSR55:?
MOV?R0,#06BH?;200US?
TSR65:?
DJNZ?R0,TSR65?;?延時?
TSR75:?
SETB?P1.4H?;拉高總線
RET
;===============================?
GET_TEMPER6:?
SETBP1.5H?;?定時入口?
BCD6:LCALL?INIT_18206
JB00H,S226
LJMPBCD6;?若DS18B20不存在則返回?
S226:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18206MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18206
NOP?
LCALL?DELAY1?
CBA6:LCALL?INIT_18206
JB?00H,ABC6
LJMP?CBA6
ABC6:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18206
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18206
LCALL?READ_182006?;READ_1820?
RET?
;==============================
READ_18206:?
MOV?R2,#8?
RE16:?
CLR?C?
SETB?P1.5H?
NOP?
NOP?
CLR?P1.5H?
NOP?
NOP?
NOP?
SETB?P1.5H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.5H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE16
RET?
;=============================
WRITE_18206:?
MOV?R2,#8?
CLR?C?
WR16:?
CLR?P1.5H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.5H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.5H?
NOP?
DJNZ?R2,WR16
SETB?P1.5H?
RET
;=======================================
READ_182006:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE006:?
MOV?R2,#8?
RE016:?
CLR?C?
SETB?P1.5H?
NOP?
NOP?
CLR?P1.5H?
NOP?
NOP?
NOP?
SETB?P1.5H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.5H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE016
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE006
RET?
;=======================================
INIT_18206:?
SETB?P1.5H?
NOP?
CLR?P1.5H?
MOV?R0,#250
TSR16:?
DJNZ?R0,TSR16?;?延時520us?
SETB?P1.5H?
MOV?R0,#25H?;96US-25H?
TSR26:?
DJNZ?R0,TSR26
JNB?P1.5H,TSR36;如D0為低則復位成功，DS18B20存在?
LJMP?TSR46?;?延時?
TSR36:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR56?
TSR46:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR76
TSR56:?
MOV?R0,#06BH?;200US?
TSR66:?
DJNZ?R0,TSR66?;?延時?
TSR76:?
SETB?P1.5H?;拉高總線
RET
;===============================?
GET_TEMPER7:?
SETBP1.6H?;?定時入口?
BCD7:LCALL?INIT_18207
JB00H,S227
LJMPBCD7;?若DS18B20不存在則返回?
S227:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18207MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18207
NOP?
LCALL?DELAY1?
CBA7:LCALL?INIT_18207
JB?00H,ABC7
LJMP?CBA7
ABC7:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18207
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18207
LCALL?READ_182007?;READ_1820?
RET?
;==============================
READ_18207:?
MOV?R2,#8?
RE17:?
CLR?C?
SETB?P1.6H?
NOP?
NOP?
CLR?P1.6H?
NOP?
NOP?
NOP?
SETB?P1.6H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.6H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE17
RET?
;=============================
WRITE_18207:?
MOV?R2,#8?
CLR?C?
WR17:?
CLR?P1.6H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.6H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.6H?
NOP?
DJNZ?R2,WR17
SETB?P1.6H?
RET
;=======================================
READ_182007:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE007:?
MOV?R2,#8?
RE017:?
CLR?C?
SETB?P1.6H?
NOP?
NOP?
CLR?P1.6H?
NOP?
NOP?
NOP?
SETB?P1.6H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.6H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE017
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE007
RET?
;=======================================
INIT_18207:?
SETB?P1.6H?
NOP?
CLR?P1.6H?
MOV?R0,#250
TSR17:?
DJNZ?R0,TSR17?;?延時520us?
SETB?P1.6H?
MOV?R0,#25H?;96US-25H?
TSR27:?
DJNZ?R0,TSR27
JNB?P1.6H,TSR37;如D0為低則復位成功，DS18B20存在?
LJMP?TSR47;?延時?
TSR37:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR57?
TSR47:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR77
TSR57:?
MOV?R0,#06BH?;200US?
TSR67:?
DJNZ?R0,TSR67;?延時?
TSR77:?
SETB?P1.6H?;拉高總線
RET
;===============================?
GET_TEMPER8:?
SETBP1.7H?;?定時入口?
BCD8:LCALL?INIT_18208
JB00H,S228
LJMPBCD8;?若DS18B20不存在則返回?
S228:?LCALL?DELAY1?
MOVA,#0CCH?;?跳過ROM匹配------0CC命令 LCALL?WRITE_18208MOV?A,#44H?;?發出溫度轉換命令?
LCALL?WRITE_18208
NOP?
LCALL?DELAY1?
CBA8:LCALL?INIT_18208
JB?00H,ABC8
LJMP?CBA8
ABC8:LCALL?DELAY1?
MOV?A,#0CCH?;?跳過ROM匹配?
LCALL?WRITE_18208
MOV?A,#0BEH?;?發出讀溫度命令?
LCALL?WRITE_18208
LCALL?READ_182008?;READ_1820?
RET?
;==============================
READ_18208:?
MOV?R2,#8?
RE18:?
CLR?C?
SETB?P1.7H?
NOP?
NOP?
CLR?P1.7H?
NOP?
NOP?
NOP?
SETB?P1.7H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.7H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE18
RET?
;=============================
WRITE_18208:?
MOV?R2,#8?
CLR?C?
WR18:?
CLR?P1.7H?
MOV?R3,#6?
DJNZ?R3,$?
RRC?A?
MOV?P1.7H,C?
MOV?R3,#23?
DJNZ?R3,$?
SETB?P1.7H?
NOP?
DJNZ?R2,WR18
SETB?P1.7H?
RET
;=======================================
READ_182008:?
MOV?R4,#2?;?將溫度高位和低位從DS18B20中讀出?
MOV?R1,#31H?;?低位存入30H(TEMPER_L),高位存入31H(TEMPER_H)?
RE008:?
MOV?R2,#8?
RE018:?
CLR?C?
SETB?P1.7H?
NOP?
NOP?
CLR?P1.7H?
NOP?
NOP?
NOP?
SETB?P1.7H?
MOV?R3,#7?
DJNZ?R3,$?
MOV?C,P1.7H?
MOV?R3,#23?
DJNZ?R3,$?
RRC?A?
DJNZ?R2,RE018
MOV?@R1,A?
DEC?R1?
DJNZ?R4,RE008
RET?
;=======================================
INIT_18208:?
SETB?P1.7H?
NOP?
CLR?P1.7H?
MOV?R0,#250
TSR18:?
DJNZ?R0,TSR18?;?延時520us?
SETB?P1.7H?
MOV?R0,#25H?;96US-25H?
TSR28:?
DJNZ?R0,TSR28
JNB?P1.7H,TSR38;如D0為低則復位成功，DS18B20存在?
LJMP?TSR48;?延時?
TSR38:?
SETB?00H?;?置標誌位,表示DS1820存在?
LJMP?TSR58
TSR48:?
CLR?00H?;?清標誌位,表示DS1820不存在?
LJMP?TSR78
TSR58:?
MOV?R0,#06BH?;200US?
TSR68:?
DJNZ?R0,TSR68;?延時?
TSR78:?
SETB?P1.7H?;拉高總線
RET
;===============================?
;======================================
DELAY1:MOV?R7,#20H?
DJNZ?R7,$?
RET
;====================================
TEMPRRO:MOV?33H,#00H;初始化0
MOV?A,30H
ANL?A,#0FH
SWAP?A
MOV?33H,A
MOV?A,31H
ANL?A,#0F0H
SWAP?A
ORL?33H,A;重新組合成的帶符號數據（整數部分）
MOV?A,33H
ANL?A,#80H;判斷符號
JZ?TEMPP
MOV?A,33H
CPL?A
;ADD?A,#01H
SJMP?TEMPP1
TEMPP:MOV?A,33H;正數處理程序
LCALL?HBCD
MOV?A,31H
ANL?A,#0FH
MOV?DPTR,#TEMPTAB;小數查表
MOVC?A,@A+DPTR
MOV?36H,A
CLR?P3.7;表示正數
SJMP?EXIT
TEMPP1:LCALL?HBCD;負數處理程序
MOV?A,31H ANL?A,#0FH ORL?A,#0F0H CPL?A ADD?A,#01H MOV?DPTR,#TEMPTAB MOVC?A,@A+DPTR;小數查表 MOV?36H,A SETB?P3.7;表示負數EXIT:RET
HBCD: MOV B,#100 ;分離出百位，存放在R3中
DIV AB
MOV R3,A
MOV A,#10 ;余數繼續分離十位和個位
XCH A,B
DIV AB
SWAP A
ORL A,B ;將十位和個位拼裝成BCD碼
MOV?34H,R3
MOV?35H,A
RET
TEMPTAB:DB?00H,01H,01H,02H,03H,03H,04H,04H
DB?05H,06H,06H,07H,08H,08H,09H,09H;0~16*0.0652
;==================================================
CBCD:;MOV?R2,#04H;5個待分離的BCD
CL:MOV?A,@R1?;分離後將占10個單元
MOV?B,A ANL?A,#0F0H SWAP?A MOV?4CH,A MOV?A,B ANL?A,#0FH MOV?4DH,A MOV?@R0,4CH INC?R0 MOV?@R0,4DH INC?R0 INC?R1 DJNZ?R2,CL RET;===================================================
DISPLAY:MOV?R0,#38H;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;顯示緩沖區首地址
MOV?R2,#04
DISP_LOOP:MOV?A,@R0
LCALL?DISP
INC?R0
DJNZ?R2,DISP_LOOP
CLRP0.2
NOP
NOP
SETB?P0.2;上升沿將數據送到輸出鎖存器
NOP
NOP
NOP
CLRP0.2