单片机数字式温度测量

ID:761092 · 发表于 2020-6-30 21:00

基本要求：利用单片机AT89C51基于数字温度传感器设计数字温度计，能对模拟信号进行检测，能将所测量的温度在LED显示器上显示。测量范围为20℃～ 120℃
创新：具有方便的键盘操作功能；温度超出界限时具有报警功能等。

仿真

程序如下：

TEMP_ZH DATA 24H
TEMPL DATA 25H
TEMPH DATA 26H
TEMP_TH DATA 27H
TEMP_TL DATA 28H
TEMPHC DATA 29H
TEMPLC DATA 2AH
K1 EQU P1.4
K2 EQU P1.5
K3 EQU P1.6
K4 EQU P1.7
BEEP EQU P3.6
RELAY EQU P3.7
LCD_X EQU 2FH
LCD_RS EQU P2.0
LCD_RW EQU P2.1
LCD_EN EQU P2.2
flag1 EQU 20H.0
KEY_UD EQU 20H.1
date_line EQU P3.3
;========================================================================
ORG 0000H
JMP MAIN
MAIN:
MOV SP,#60H;
MOV A,#00H;
MOV R0,#20H;
MOV R1,#10H;
CLEAR:
MOV @R0,A;
INC R0;
DJNZ R1,CLEAR;
CALL SET_LCD;
CALL RE_18B20;
start:
CALL RESET;
JNB flag1,START1;
CALL MENU_OK;
CALL READ_E2;
CALL TEMP_BJ;
JMP START2;
START1:
CALL MENU_ERROR;
CALL TEMP_BJ;
JMP $;
START2:
CALL RESET;
JNB FLAG1,START1;
MOV A,#0CCH;
CALL WRITE;
MOV A,#44H;
CALL WRITE;
CALL RESET;
MOV A,#0CCH;
CALL WRITE;
MOV A,#0BEH;
CALL WRITE;
CALL READ;
call CONVTEMP;
Call DISPBCD;
CALL CONV;
CALL TEMP_COMP;
CALL PROC_KEY;
SJMP START2;
PROC_KEY:
JB K1,PROC_K1;
CALL BEEP_BL;
JNB K1,$;
MOV DPTR,#M_ALAX1;
MOV A,#1;
CALL LCD_PRINT;
CALL LOOK_ALARM;
JB K3,$;
CALL BEEP_BL;
JMP PROC_K2;
PROC_K1:
JB K2,PROC_END;
CALL BEEP_BL;
JNB K2,$;
MOV DPTR,#RESET_A1;
MOV A,#1;
CALL LCD_PRINT;
CALL SET_ALARM;
CALL RE_18B20;
CALL WRITE_E2;
PROC_K2:
CALL MENU_OK;
CALL TEMP_BJ;
PROC_END:
RET
;============================================================
SET_ALARM:
CALL RESET_ALARM;
CALL LOOK_ALARM;
AS0:
JB K1,AS00;
CALL BEEP_BL;
JNB K1,$;
CPL 20H.1;
AS00:
JB 20H.1,ASZ01;
JMP ASJ01;
ASZ01:
JB K2,ASZ02;
CALL BEEP_BL;
INC TEMP_TH;
MOV A,TEMP_TH;
CJNE A,#120,ASZ011;
MOV TEMP_TH,#0;
ASZ011:
CALL LOOK_ALARM;
MOV R5,#10;
CALL DELAY;
JMP ASZ01;
ASZ02:
JB K3,ASZ03;
CALL BEEP_BL;
INC TEMP_TL;
MOV A,TEMP_TL;
CJNE A,#99,ASZ021;
MOV TEMP_TL,#00H;
ASZ021:
CALL LOOK_ALARM;
MOV R5,#10;
CALL DELAY;
JMP ASZ02;
ASZ03:
JB K4,AS0;
CALL BEEP_BL;
JNB K4,$;
RET
ASJ01:
JB K2,ASJ02;
CALL BEEP_BL;
DEC TEMP_TH;
MOV A,TEMP_TH;
CJNE A,#0FFH,ASJ011;
JMP ASJ022;
ASJ011:
CALL LOOK_ALARM;
MOV R5,#10;
CALL DELAY;
JMP AS0;
ASJ02:
JB K3,ASJ03;
CALL BEEP_BL;
DEC TEMP_TL;
MOV A,TEMP_TL;
CJNE A,#0FFH,ASJ021;
JMP ASJ022;
ASJ021:
CALL LOOK_ALARM;
MOV R5,#10;
CALL DELAY;
JMP AS0;
ASJ022:
CPL 20H.1;
JMP ASZ01;
ASJ03:
JMP ASZ03;
RET
RESET_ALARM:
MOV DPTR,#RESET_A1;
MOV A,#1;
CALL LCD_PRINT;
RET
RESET_A1:
DB "RESET ALERT CODE";
;==================================================================
TEMP_COMP:
MOV A,TEMP_TH;
SUBB A,TEMP_ZH;
JC CHULI1;
MOV A,TEMP_ZH;
SUBB A,TEMP_TL;
JC CHULI2;
MOV DPTR,#BJ5;
CALL TEMP_BJ3;
CLR RELAY;
RET
CHULI1:
MOV DPTR,#BJ3;
CALL TEMP_BJ3;
SETB RELAY;
CALL BEEP_BL;
RET
CHULI2:
MOV DPTR,#BJ4;
CALL TEMP_BJ3;
CALL BEEP_BL;
RET
;-------------------------------
TEMP_BJ3:
MOV A,#0CEH;
CALL WCOM;
MOV R1,#0;
MOV R0,#2;
BBJJ3:
MOV A,R1;
MOVC A,@A+DPTR;
CALL WDATA;
INC R1;
DJNZ R0,BBJJ3;
RET
BJ3:
DB ">H";
BJ4:
DB "<L";
BJ5:
DB "!";
;====================================================================
TEMP_BJ:
MOV A,#0CBH;
CALL WCOM;
MOV DPTR,#BJ1;
MOV R1,#0;
MOV R0,#2;
BBJJ1:
MOV A,R1;
MOVC A,@A+DPTR;
CALL WDATA;
INC R1;
DJNZ R0,BBJJ1;
RET
BJ1:
DB 00H,"C";
;==================================
MENU_OK:
MOV DPTR,#M_OK1;
MOV A,#1;
CALL LCD_PRINT;
MOV DPTR,#M_OK2;
MOV A,#2;
CALL LCD_PRINT;
RET
M_OK1:
DB "DS18B20 OK",0
M_OK2:
DB "TEMP:",0
;------------------------------------
MENU_ERROR:
MOV DPTR,#M_ERROR1;
MOV A,#1;
CALL LCD_PRINT;
MOV DPTR,#M_ERROR2;
MOV A,#2;
CALL LCD_PRINT;
RET
M_ERROR1:
DB "DS18B20 ERROR",0;
M_ERROR2:
DB "TEMP:----",0;
;====================================
reset:
setb date_line;
nop
clr date_line;
mov r0,#6bh;
mov r1,#04h;
tsr1:
djnz r0,$;
mov r0,#6bh;
djnz r1,tsr1;
setb date_line;
nop
nop
nop
mov r0,#32h;
tsr2:
jnb date_line,tsr3;
djnz r0,tsr2;
jmp tsr4;
tsr3:
setb flag1;
jmp tsr5;
tsr4:
clr flag1;
jmp tsr7;
tsr5:
mov r0,#06bh;
tsr6:
djnz r0,$;
tsr7:
setb date_line;
ret
;====================================
RE_18B20:
JB FLAG1,RE_18B20A;
RET
RE_18B20A:
CALL RESET;
MOV A,#0CCH;
LCALL WRITE;
MOV A,#4EH;
LCALL WRITE;
MOV A,TEMP_TH;
LCALL WRITE;
MOV A,TEMP_TL;
LCALL WRITE;
MOV A,#7FH;
LCALL WRITE;
RET
;------------------------------------
WRITE_E2:
CALL RESET;
MOV A,#0CCH;
LCALL WRITE;
MOV A,#48H;
CALL WRITE;
RET
;------------------------------------
READ_E2:
CALL RESET;
MOV A, #0CCH;
LCALL WRITE;
MOV A, #0B8H;
CALL WRITE;
RET
;------------------------------------------------------------------------
STORE_DATA:
MOV A,#40H;
CALL WCOM;
MOV R2,#08H;
MOV DPTR,#D_DATA;
MOV R3,#00H;
S_DATA:
MOV A,R3;
MOVC A,@A+DPTR;
CALL WDATA;
INC R3;
DJNZ R2,S_DATA;
RET
D_DATA:
DB 0CH,12H,12H,0CH,00H,00H,00H,00H;10h,06h,09h,08h,08h,09h,06h,00h;
;======================================================================
write:
mov r2,#8;
CLR C;
wr1:
clr date_line;
mov r3,#07;
djnz r3,$;
rrc a;
mov date_line,c;
mov r3,#3CH;
djnz r3,$;
setb date_line;
nop
djnz r2,wr1;
setb date_line;
ret
;-------------------------------------
read:
mov r4,#4;
mov r1,#TEMPL;
re00:
mov r2,#8;
re01:
clr cy;
setb date_line;
nop
nop
clr date_line;
nop
nop
nop
setb date_line;
mov r3,#09;
djnz r3,$;
mov c,date_line;
mov r3,#3CH;
djnz r3,$;
rrc a;
djnz r2,re01;
mov @r1,a;
inc r1;
djnz r4,re00;
ret
;**************************************************************************************
CONVTEMP:
MOV A,TEMPH;
ANL A,#80H;
JZ TEMPC1;
CLR C;
MOV A,TEMPL;
CPL A;
ADD A,#01H;
MOV TEMPL,A;
MOV A,TEMPH;
CPL A;
ADDC A,#00H;
MOV TEMPH,A;
SJMP TEMPC11;
TEMPC1:
MOV TEMPHC,#0AH;
TEMPC11:
MOV A,TEMPHC;
SWAP A;
MOV TEMPHC,A;
MOV A,TEMPL;
ANL A,#0FH;
MOV DPTR,#TEMPDOTTAB;
MOVC A,@A+DPTR;
MOV TEMPLC,A;
MOV A,TEMPL;
ANL A,#0F0H;
SWAP A;
MOV TEMPL,A;
MOV A,TEMPH;
ANL A,#0FH;
SWAP A;
ORL A,TEMPL;
MOV TEMP_ZH,A;
LCALL HEX2BCD1;
MOV TEMPL,A;
ANL A,#0F0H;
SWAP A;
ORL A,TEMPHC;
MOV TEMPHC,A;
MOV A,TEMPL;
ANL A,#0FH;
SWAP A;
ORL A,TEMPLC;
MOV TEMPLC,A;
MOV A,R4;
JZ TEMPC12;
ANL A,#0FH;
SWAP A;
MOV R4,A;
MOV A,TEMPHC;
ANL A,#0FH;
ORL A,R4;
MOV TEMPHC,A;
TEMPC12:
RET
;------------------------------------
HEX2BCD1:
MOV B,#064H;
DIV AB;
MOV R4,A;
MOV A,#0AH;
XCH A,B;
DIV AB;
SWAP A;
ORL A,B;
RET
;--------------------------------------------------------------------------
TEMPDOTTAB:
DB 00H,00H,01H,01H,02H,03H,03H,04H;
DB 05H,05H,06H,06H,07H,08H,08H,09H;
;======================================
LOOK_ALARM:
MOV DPTR,#M_ALAX2;
MOV A,#2;
CALL LCD_PRINT;
MOV A,#0C6H;
CALL TEMP_BJ1;
MOV A,TEMP_TH;
MOV LCD_X,#3;
CALL SHOW_DIG2H;
MOV A,#0CEH;
CALL TEMP_BJ1;
MOV A,TEMP_TL;
MOV LCD_X,#12;
CALL SHOW_DIG2L;
RET
;------------------------------------
M_ALAX1:
DB "LOOK ALERT CODE",0;
M_ALAX2:
DB "TH: TL: ",0;
;----------------------------------------------------------
TEMP_BJ1:
CALL WCOM;
MOV DPTR,#BJ2;
MOV R1,#0;
MOV R0,#2;
BBJJ2:
MOV A,R1;
MOVC A,@A+DPTR;
CALL WDATA;
INC R1;
DJNZ R0,BBJJ2;
RET
BJ2:
DB 00H,"C"
;-------------------------------------
SHOW_DIG2H:
MOV B,#100;
DIV AB;
ADD A,#30H;
PUSH B;
MOV B,LCD_X;
CALL LCDP2;
POP B;
MOV A,#0AH;
XCH A,B;
DIV AB;
ADD A,#30H;
INC LCD_X;
PUSH B;
MOV B,LCD_X;
CALL LCDP2;
POP B;
INC LCD_X;
MOV A,B;
MOV B,LCD_X;
ADD A,#30H;
CALL LCDP2;
RET
SHOW_DIG2L:
MOV B,#100;
DIV AB;
MOV A,#0AH;
XCH A,B;
DIV AB;
ADD A,#30H;
PUSH B;
MOV B,LCD_X;
CALL LCDP2;
POP B;
INC LCD_X;
MOV A,B;
MOV B,LCD_X;
ADD A,#30H;
CALL LCDP2;
RET
;-----------------------------------------------------------------------
DISPBCD:
MOV A,TEMPLC;
ANL A,#0FH;
MOV 70H,A;
MOV A,TEMPLC;
SWAP A;
ANL A,#0FH;
MOV 71H,A;
MOV A,TEMPHC;
ANL A,#0FH;
MOV 72H,A;
MOV A,TEMPHC;
SWAP A;
ANL A,#0FH;
MOV 73H,A;
MOV A,TEMPHC;
ANL A,#0F0H;
CJNE A,#010H,DISPBCD0;
SJMP DISPBCD2;
DISPBCD0:
MOV A,TEMPHC;
ANL A,#0FH;
JNZ DISPBCD2;
MOV A,TEMPHC;
SWAP A;
ANL A,#0FH;
MOV 73H,#0AH;
MOV 72H,A;
DISPBCD2:
RET
;========================================================================
CONV:
MOV A,#73H;
MOV LCD_X,#6;
CJNE A,#1,CONV1;
JMP CONV2;
CONV1:
MOV A,#'*';
MOV B,LCD_X;
CALL LCDP2;
JMP CONV3;
CONV2:
CALL SHOW_DIG2;
CONV3:
INC LCD_X;
mov a,73h;
CALL SHOW_DIG2;
INC LCD_X;
mov a,72h;
CALL SHOW_DIG2;
inc LCD_X;
mov a,71h;
CALL SHOW_DIG2;
inc LCD_X;
MOV A,#'.';
MOV B,LCD_X;
CALL LCDP2;
MOV A,70h;
INC LCD_X;
CALL SHOW_DIG2;
RET
;-------------------------------------
SHOW_DIG2:
ADD A,#30H;
MOV B,LCD_X;
CALL LCDP2;
RET
;-------------------------------------
LCDP2:
PUSH ACC;
MOV A,B;
ADD A,#0C0H;
CALL WCOM;
POP ACC;
CALL WDATA;
RET
;-------------------------------------
SET_LCD:
CLR LCD_EN;
CALL INIT_LCD;
CALL STORE_DATA;
RET
INIT_LCD:
MOV A,#38H;
CALL WCOM;
call delay1;
MOV A,#38H;
CALL WCOM;
call delay1;
MOV A,#38H;
CALL WCOM;
call delay1;
MOV A,#0CH;
CALL WCOM;
call delay1;
MOV A,#01H;
CALL WCOM;
call delay1;
RET
;====================================
CLR_LINE1:
MOV A,#80H;
CALL WCOM;
MOV R0,#24;
C1:
MOV A,#'*';
CALL WDATA;
DJNZ R0,C1;
RET
;====================================
LCD_PRINT:
CJNE A,#1,LINE2;
LINE1:
MOV A,#80H;
CALL WCOM;
CALL CLR_LINE;
MOV A,#80H;
CALL WCOM;
JMP FILL;
LINE2:
MOV A,#0C0H;
CALL WCOM;
CALL CLR_LINE;
MOV A,#0C0H;
CALL WCOM;
FILL:
CLR A
MOVC A,@A+DPTR;
CJNE A,#0,LC1;
RET
LC1:
CALL WDATA;
INC DPTR;
JMP FILL;
RET
;====================================
CLR_LINE:
MOV R0,#24;
CL1:
MOV A,#'*';
CALL WDATA;
DJNZ R0,CL1;
RET
DE:
MOV R7,#250;
DJNZ R7,$;
RET
;====================================
WCOM:
MOV P0,A;
CLR LCD_RS;
CLR LCD_RW;
SETB LCD_EN;
ACALL DELAY1;
CLR LCD_EN;
RET
;====================================
WDATA:
MOV P0,A;
SETB LCD_RS;
CLR LCD_RW;
SETB LCD_EN;
CALL DE;
CLR LCD_EN;
CALL DE;
RET
;====================================
;PRINT A CHAR ON LINE 1
;A=ASC DATA,B=LINE X POS
;====================================
LCDP1:
PUSH ACC;
MOV A,B;
ADD A,#80H;
CALL WCOM;
POP ACC;
CALL WDATA;
RET
;====================================
BEEP_BL:
MOV R6,#100;
BL2:
CALL DEX1;
CPL BEEP;
DJNZ R6,BL2;
MOV R5,#10;
CALL DELAY;
RET
DEX1:
MOV R7,#180;
DE2:
NOP
DJNZ R7,DE2;
RET
DELAY:
MOV R6,#50;
DL1:
MOV R7,#100;
DJNZ R7,$;
DJNZ R6,DL1;
DJNZ R5,DELAY;
RET
DELAY1:
MOV R6,#25;
DL2:
MOV R7,#100;
DJNZ R7,$;
DJNZ R6,DL2;
RET
;====================================
END

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