基于DS18B20设计的数字温度计论文 doc(5)

邵阳学院课程设计

LJMP TSR7 TSR5:

MOV R0,#06BH MOV R1,#03H TSR6:DJNZ R0,TSR6 MOV R0,#6BH DJNZ R1,TSR6 TSR7:SETB P2.0 RET

RE_CONFIG:JB 20H.1,RE_CONFIG1 RET RE_CONFIG1:

MOV A,#0CCH LCALL WRITE_1820 MOV A,#4EH LCALL WRITE_1820 MOV A,#00H LCALL WRITE_1820 MOV A,#00H LCALL WRITE_1820 MOV A,#1FH LCALL WRITE_1820 RET SETB P2.0 LCALL INIT_1820 JB 20H.1,TSS2 RET TSS2:

MOV A,#0CCH LCALL WRITE_1820 MOV A,#44H

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邵阳学院课程设计

LCALL WRITE_1820 LCALL INIT_1820 MOV A,#0CCH LCALL WRITE_1820 MOV A,#0BEH LCALL WRITE_1820 LCALL READ_18200 MOV 37H,A RET WRITE_1820: MOV R2,#8 CLR C WR1:CLR P2.0 NOP NOP NOP NOP RRC A MOV P2.0,C MOV R3,#35 DJNZ R3,$ SETB P2.0 NOP

DJNZ R2,WR1 SETB P2.0 RET READ_18200: MOV R4,#2 RE00:MOV R2,#8 RE01:CLR C SETB P2.0

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邵阳学院课程设计

NOP NOP CLR P2.0 NOP NOP NOP SETB P2.0 NOP NOP MOV C,P2.0 MOV R3,#35 RE20:

DJNZ R3,RE20 RRC A DJNZ R2,RE01 MOV @R1,A DEC R1 DJNZ R4,RE00 RET TEMPER_COV: MOV A,#0F0H ANL A,36H SWAP A MOV 37H,A MOV A,36H

JNB ACC.3,TEMPER_COV1 INC 37H TEMPER_COV1: MOV A,35H ANL A,#07H SWAP A

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邵阳学院课程设计

ADD A,37H MOV 37H,A LCALL BIN_BCD RET BIN_BCD: MOV 39H,37H MOV A,37H MOV B,#100 DIV AB MOV 38H,A MOV 37H,B XCH A,B MOV B,#10 DIV AB MOV 37H,A MOV 36H,B RET DISP: SETB RS0

MOV R0, #36H MOV R7, #3 LOOPP:MOV A, @R0 MOV DPTR, #TAB MOVC A, @A+DPTR MOV SBUF, A JNB TI, $ CLR TI INC R0

DJNZ R7, LOOPP CLR RS0 RET

TAB: DB 11H, 0D7H, 32H, 92H, 0D4H, 98H, 18H, 0D1H, 10H,

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邵阳学院课程设计

90H ,0FFH, 070H, 0FEH

T12MS: SETB RS1 MOV R7, #18H TM: MOV R6, #0FFH TM6: DJNZ R6, TM6 DJNZ R7, TM CLR RS1 RET T1S: SETB RS1 MOV R6, #3 LSP:ACALL T12MS DJNZ R6, LSP CLR RS1 RET END

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