【正文】 CALL WR_887FAN5: LCALL RINGK5: LCALL XIANSHI SETB SETB SETB SETB SETB LCALL DELAY1 JNB ,FAN4 JNB ,K10 JNB ,FAN6 JNB ,SET5 JNB ,SET55 AJMP K5SET5: LCALL RING MOV R7,62H LCALL ADD1 SJMP WR5SET55: LCALL RING MOV R7,62H LCALL SUBB1 SJMP WR5WR5: MOV 62H,A MOV A,62H CJNE A,24H,K5 MOV 62H,00H AJMP K5FAN6: LCALL RINGK6: LCALL XIANSHI SETB SETB SETB SETB SETB LCALL DELAY1 JNB ,FAN5 JNB ,K10 JNB ,FAN7 JNB ,SET6 JNB ,SET66 AJMP K6SET6: LCALL RING MOV R7,61H LCALL ADD1 SJMP WR6SET66: LCALL RING MOV R7,61H LCALL SUBB1 SJMP WR6WR6: MOV 61H,A MOV A,61H CJNE A,60H,K6 MOV 61H,00H AJMP K6FAN7: LCALL RINGK7: LCALL XIANSHI SETB SETB SETB SETB SETB LCALL DELAY1 JNB ,FAN6 JNB ,WR_887 JNB ,K9 JNB ,SET7 JNB ,SET77 AJMP K7SET7: LCALL RING MOV R7,60H LCALL ADD1 SJMP WR7SET77: LCALL RING MOV R7,60H LCALL SUBB1 SJMP WR7WR7: MOV 60H,A MOV A,60H CJNE A,60H,K7 MOV 60H,00H AJMP K7K9: LCALL RING LCALL FAN1RING: CLR CALL DELAY1 SETB CALL DELAY20 RETWR_887: CALL RING ACALL DELAY MOV DPTR,0D000H MOV A,60H MOVX @DPTR,A INC DPTR INC DPTR MOV A,61H MOVX @DPTR,A INC DPTR INC DPTR MOV A,62H MOVX @DPTR,A INC DPTR INC DPTR MOV A,63H MOVX @DPTR,A INC DPTR MOV A,64H MOVX @DPTR,A INC DPTR MOV A,65H MOVX @DPTR,A INC DPTR MOV A,66H MOVX @DPTR,A MOV DPTR,0D00BH MOV A,22H MOVX @DPTR,A MOV IE,82H SETB LJMP MAINADD1: MOV A,R7 ADD A,01H DA A RETSUBB1: CLR C MOV A,9AH SUBB A,01H ADD A,R7 DA A RETXIN: MOV DPTR,0D00AH MOVX A,@DPTR JBC ,XIN CALL READ RETREAD: MOV DPTR,0D009H MOVX A,@DPTR MOV 66H,A MOV DPTR,0D008H MOVX A,@DPTR MOV 65H,A MOV DPTR,0D007H MOVX A,@DPTR MOV 64H,A MOV DPTR,0D006H MOVX A,@DPTR MOV 63H,A MOV DPTR,0D004H MOVX A,@DPTR MOV 62H,A MOV DPTR,0D002H MOVX A,@DPTR MOV 61H,A MOV DPTR,0D000H MOVX A,@DPTR MOV 60H,A MOV SCON,00HGET_TEMPER: LCALL RST18B20 。復位DS18B20 JNB ,GET_TEMPER MOV A,0CCH 。跳過ROM匹配 LCALL WR18B20 MOV A,44H 。向DS18B20發(fā)出溫度轉換命令 LCALL WR18B20 LCALL RST18B20 。準備讀溫度前先復位DS18B20 MOV A,0CCH 。跳過ROM匹配 LCALL WR18B20 MOV A,0BEH 。向DS18B20發(fā)出讀溫度命令 LCALL WR18B20 LCALL RE18B20 。讀出溫度數據 RETRST18B20: SETB NOP CLR MOV R0,6BH 。主機發(fā)出復位低脈沖 MOV R1,04HDSR1: DJNZ R0,$ MOV R0,6BH DJNZ R1,DSR1 SETB 。拉高數據線 NOP NOP NOP MOV R0,32HDSR2: JNB ,DSR3 。等待DS18B20回應 DJNZ R0,DSR2 JMP DSR4DSR3: SETB 。置標志們,表示DS18B20存在 JMP DSR5DSR4: CLR 。清標志位,表示DS18B20不存在 JMP DSR7DSR5: MOV R0,6BHDSR6: DJNZ R0,$ 。延時一段時間DSR7: SETB RETWR18B20:MOV R2,8 CLR CYW1: CLR MOV R3,07H DJNZ R3,$ RRC A MOV ,C MOV R3,3CH DJNZ R3,$ SETB NOP DJNZ R2,W1 SETB RETRE18B20:MOV R4,2 MOV R1,25HRE00: MOV R2,8RE01: CLR C SETB NOP NOP CLR NOP NOP NOP SETB MOV R3,09 DJNZ R3,$ MOV C, MOV R3,31H 。100um DJNZ R3,$ NOP RRC A DJNZ R2,RE01 MOV @R1,A INC R1 DJNZ R4,RE00 RETT_BCD: MOV A,26H ANL A,0F8H JZ C1 CLR C MOV A,25H CPL A ADD A,01H MOV 25H,A MOV A,26H CPL A ADDC A,00H MOV 26H,A MOV 29H,0BH SJMP C2 C1: MOV 29H,0AH C2: MOV A,29H SWAP A MOV 29H,A MOV A,25H ANL A,0FH MOV DPTR,TAB0 MOVC A,@A+DPTR MOV 2AH,A MOV A,25H ANL A,0F0H SWAP A