单片机温度传感器程序

#include

#include

#define Key_UP P3_0 //上调温度

#define Key_DOWN P3_1 //下调温度

#define Key_SET P1_7 //设定键（温度设定，长按开电源）

#define RelayOutPort P3_5 //继电器输出

#define LEDPort P1 //LED控制口

#define LEDOneC P3_2 //LED DS1控制（百位）

#define LEDTwoC P3_3 //LED DS2控制（十位）

#define LEDThreeC P3_4 //LED DS3控制（个位）

#define TMPort P3_7 //DS1820 DataPort

unsigned char code LEDDis[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xFF,0xBF}; //0-9的LED笔划,0xFF为空,0xF7为负号

static unsigned char bdata StateREG; //可位寻址的状态寄存器

sbit DS1820ON = StateREG^0; //DS1820是否存在

sbit SetTF = StateREG^1; //是否是在温度设置状态

sbit KeySETDown = StateREG^2; //是否已按过SET键标识

sbit PowTF = StateREG^3; //电源电源标识

sbit KeyTF = StateREG^4; //键盘是否允许

//sbit KeySETDowning = StateREG^5; //SET是否正在按下

static unsigned char bdata TLV _at_ 0x0029; //温度变量高低位

static unsigned char bdata THV _at_ 0x0028;

static signed char TMV; //转换后的温度值

static unsigned char KeyV,TempKeyV; //键值

static signed char TMRomV _at_ 0x0027; //高温限制

static signed char TMSetV _at_ 0x0026; //温度设定值

static unsigned char KSDNum; //SET键连按时的采集次数

static unsigned char IntNum,IntNum2,IntNum3; //中断发生次数，IntNum用于SET长按检测，IntNum2用于设定状态时LED闪烁

static signed char LED_One,LED_Two,LED_Three; //LED的显示位LED_One为十位，LED_Two为个位

static unsigned char Sign; //负号标识

void main(void)

{

void InitDS1820(void); //定义函数

void ROMDS1820(void);

void TMVDS1820(void);

void TMRDS1820(void);

void TMWDS1820(void);

void TMREDS1820(void);

void TMERDS1820(void);

void ReadDS1820(void);

void WriteDS1820(void);

void Delay_510(void);

void Delay_110(void);

void Delay_10ms(void);

void Delay_4s(void);

void V2ToV(void);

StateREG = 0; //初始化变量

SetTF = 1;

PowTF = 1; //关电源

THV = 0;

TLV = 0;

TMV = 0;

KeyV = 0;

TempKeyV = 0;

KSDNum = 0;

IntNum = 0;

IntNum2 = 0;

IntNum3 = 0;

LED_One = 0;

LED_Two = 0;

InitDS1820(); //初始化

ROMDS1820(); //跳过ROM

TMERDS1820(); //E2PRAM中温度上限值调入RAM

InitDS1820(); //初始化

ROMDS1820(); //跳过ROM

TMRDS1820(); //读出温度指令

ReadDS1820(); //读出温度值和上限值

TMSetV = TMRomV; //拷贝保存在DS18B20ROM里的上限值到TMSetV EA = 1; //允许CPU中断

ET0 = 1; //定时器0中断打开

TMOD = 0x1; //设定时器0为模式1，16位模式

TH0=0xB1;

TL0=0xDF; //设定时值为20000us（20ms）

TR0 = 1; //开始定时

while(1);

}

//定时器0中断外理中键扫描和显示

void KeyAndDis_Time0(void) interrupt 1 using 2

{

TH0=0xB1;

TL0=0xDF; //设定时值为20000us（20ms)

LEDPort = 0xFF;

if (!Key_UP)

KeyV = 1;

if (!Key_DOWN)

KeyV = 2;

if (!Key_SET)

KeyV = 3;

//KeySETDowning = 0; //清除

if (KeyV != 0) //有键按下

{

Delay_10ms(); //延时防抖按下10ms再测

if (!Key_UP)

TempKeyV = 1;

if (!Key_DOWN)

TempKeyV = 2;

if (!Key_SET)

TempKeyV = 3;

if (KeyV == TempKeyV) //两次值相等为确定接下了键

{

if (KeyV == 3) //按下SET键，如在SET状态就退出，否则进入

{

//KeySETDowning = 1; //表明SET正在按下

PowTF = 0; //电源标识开

if (!KeyTF)

if (SetTF)

{

SetTF = 0; //标识位标识退出设定

InitDS1820(); //初始化

ROMDS1820(); //跳过ROM

TMWDS1820(); //写温度上限指令

WriteDS1820(); //写温度上限到DS18B20ROM

WriteDS1820(); //写温度上限到DS18B20ROM

WriteDS1820(); //写温度上限到DS18B20ROM

InitDS1820(); //初始化

ROMDS1820(); //跳过ROM

TMREDS1820(); //温度上限值COPY回E2PRAM

}

else

SetTF = 1;

if (!KeySETDown) //没有第一次按下SET时，KeySETDown标识置1

KeySETDown = 1;

else

KSDNum = KSDNum + 1; //前一秒内有按过SET则开始计数}

if (SetTF) //在SET状态下

{

if ((KeyV == 1) && (!KeyTF))

TMSetV = TMSetV + 1; //上调温度

if ((KeyV == 2) && (!KeyTF))

TMSetV = TMSetV - 1; //下调温度

if (TMSetV <= -55) //限制温度上下限

TMSetV = -55;

if (TMSetV >= 125)

TMSetV = 125;

}

if ((!KeyTF) && (IntNum3 == 0)) KeyTF = 1; //当键盘处于可用时，锁定

}

if (KeySETDown) //在2秒内按下了SET则计中断发生次数用于长按SET时计时用

IntNum = IntNum + 1;

if (IntNum > 55) //中断发生了55次时（大约1.2秒）75为1.5秒左右

{

IntNum = 0;

KeySETDown = 0;

if (KSDNum == 55) //如一直长按了SET1.2秒左右

{

RelayOutPort = 1; //关闭继电器输出

PowTF = 1; //电源标识关

LEDOneC = 0;

LEDTwoC = 0;

LEDThreeC = 0;

LEDPort = 0xBF; //显示"--"

Delay_4s(); //延时

LEDOneC = 1;

LEDTwoC = 1; //关显示

LEDThreeC = 1;

Delay_4s();

IntNum = 0;

IntNum2 = 0;

IntNum3 = 0;

}

KSDNum = 0;

}

}

KeyV = 0;

TempKeyV = 0; //清空变量准备下次键扫描

if (!PowTF)

{

InitDS1820(); //初始化

ROMDS1820(); //跳过ROM

TMVDS1820(); //温度转换指令

Delay_510();

Delay_510(); //延时等待转换完成

InitDS1820(); //初始化

ROMDS1820(); //跳过ROM

TMRDS1820(); //读出温度指令

ReadDS1820(); //读出温度值

V2ToV(); //转换显示值

if (TMV > TMSetV) //根据采集到的温度值控制继电器

{

RelayOutPort = 0;

}

else

{

RelayOutPort = 1;

}

if (SetTF) IntNum2 = IntNum2 + 1; //用于闪烁计数

if (IntNum2 > 50 ) IntNum2 = 0;

if (KeyTF) IntNum3 = IntNum3 + 1; //用于防止按键连按

if (IntNum3 > 25)

{

IntNum3 = 0;

KeyTF = 0;

}

if ((SetTF) && (IntNum2 < 25)) goto InitEnd; //计数在后半段时显示

LEDPort = LED_One;

LEDOneC = 0;

Delay_510();

LEDOneC = 1; //显示百位数

LEDPort = LED_Two;

LEDTwoC = 0;

Delay_510();

LEDTwoC = 1; //显示十位数

LEDPort = LED_Three;

LEDThreeC = 0;

Delay_510();

LEDThreeC = 1; //显示个位数

}

InitEnd:;

}

void V2ToV(void) //数值转换

{

TLV = TLV >> 4;

THV = THV << 4; //读出的高低位数值移位

TMV = TLV | THV; //合并高低位放入TM为实际温度值

Sign = 0;

if (SetTF || !Key_SET)

Sign = TMSetV >> 7; //取符号

else

Sign = TMV >> 7;

if (Sign)

{

if (SetTF || !Key_SET)

{

LED_One = (~(TMSetV-1)) / 100; //SET状态下显示设定值

LED_Two = ((~(TMSetV-1)) - LED_One * 100)/10;

LED_Three = (~(TMSetV-1)) - LED_One * 100 - LED_Two * 10;

}

else

{

LED_One = (~TMV) / 100; //转换百位值

LED_Two = ((~TMV) - LED_One * 100)/10;

LED_Three = (~TMV) - LED_One * 100 - LED_Two * 10;

}

}

else

{

if (SetTF || !Key_SET)

{

LED_One = (TMSetV) / 100; //SET状态下显示设定值

LED_Two = (TMSetV - LED_One * 100)/10;

LED_Three = TMSetV - LED_One * 100 - LED_Two * 10;

}

else

{

LED_One = (TMV) / 100; //转换百位值

LED_Two = (TMV - LED_One * 100)/10;

LED_Three = TMV - LED_One * 100 - LED_Two * 10;

}

}

//转LED字段

if (LED_One) //超过百时十位的处理

LED_Two = LEDDis[LED_Two];

else

{

if (LED_Two == 0)

LED_Two = LEDDis[10];

else

LED_Two = LEDDis[LED_Two];

}

if (Sign)

LED_One = LEDDis[11];

else

{

if (LED_One == 0)

LED_One = LEDDis[10];

else

LED_One = LEDDis[LED_One];

}

LED_Three = LEDDis[LED_Three];

}

void InitDS1820(void) //初始化DS1820

{

TMPort = 1; //拉高TMPort

_nop_(); //保持一个周期

TMPort = 0; //拉低TMPort

Delay_510(); //延时DS1820复位时间要500us的低电平TMPort = 1; //拉高TMPort

_nop_(); //保持

_nop_();

_nop_();

Delay_110(); //延时110us 等待DS1820回应

if (!TMPort) //回应信号为低电平

DS1820ON = 1;

else

DS1820ON = 0;

Delay_110(); //延时

Delay_110();

TMPort = 1; //拉高TMPort

}

void ROMDS1820(void) //跳过ROM匹配

{

#pragma asm

MOV A,#0CCH

MOV R2,#8

CLR C

WR1:

CLR P3_7

MOV R3,#6

DJNZ R3,$

RRC A

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR1

SETB P3_7

#pragma endasm

}

void TMVDS1820(void) //温度转换指令

{

#pragma asm

MOV A,#44H

MOV R2,#8

CLR C

WR2:

CLR P3_7

MOV R3,#6

DJNZ R3,$

RRC A

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR2

SETB P3_7

#pragma endasm

}

void TMRDS1820(void) //读出温度指令

{

#pragma asm

MOV A,#0BEH

MOV R2,#8

CLR C

WR3:

CLR P3_7

MOV R3,#6

DJNZ R3,$

RRC A

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR3

SETB P3_7

#pragma endasm

}

void TMWDS1820(void) //写入温度限制指令{

#pragma asm

MOV A,#04EH

MOV R2,#8

CLR C

WR13:

CLR P3_7

MOV R3,#6

DJNZ R3,$

RRC A

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR13

SETB P3_7

#pragma endasm

}

void TMREDS1820(void) //COPY RAM to E2PRAM {

#pragma asm

MOV A,#48H

MOV R2,#8

CLR C

WR33:

CLR P3_7

MOV R3,#6

DJNZ R3,$

RRC A

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR33

SETB P3_7

#pragma endasm

}

void TMERDS1820(void) //COPY E2PRAM to RAM {

#pragma asm

MOV A,#0B8H

MOV R2,#8

CLR C

WR43:

CLR P3_7

MOV R3,#6

DJNZ R3,$

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR43

SETB P3_7

#pragma endasm

}

void WriteDS1820(void) //写入温度限制值

{

#pragma asm

MOV A,26H //发出4EH写ROM指令后连发两个字节分别为上下限

MOV R2,#8

CLR C

WR23:

CLR P3_7

MOV R3,#6

DJNZ R3,$

RRC A

MOV P3_7,C

MOV R3,#23

DJNZ R3,$

SETB P3_7

NOP

DJNZ R2,WR23

SETB P3_7

#pragma endasm

}

void ReadDS1820(void) //读出温度值

{

#pragma asm

MOV R4,#3 ; 将温度高位和低位，高温限制位从DS18B20中读出

MOV R1,#29H ; 低位存入29H(TEMPER_L),高位存入28H(TEMPER_H)，高温限制位存入27H(TMRomV)

RE00:

MOV R2,#8

RE01:

CLR C

SETB P3_7

NOP

CLR P3_7

NOP

NOP

NOP

SETB P3_7

MOV R3,#09

RE10:

DJNZ R3,RE10

MOV C,P3_7

MOV R3,#23

RE20:

DJNZ R3,RE20

RRC A

DJNZ R2,RE01

MOV @R1,A

DEC R1

DJNZ R4,RE00

#pragma endasm

}

void Delay_510(void) //延时510微秒{

#pragma asm

MOV R0,#7DH

MOV R1,#02H

TSR1:

DJNZ R0,TSR1

MOV R0,#7DH

DJNZ R1,TSR1

#pragma endasm

}

void Delay_110(void) //延时110微秒{

#pragma asm

MOV R0,#19H

MOV R1,#02H

TSR2:

DJNZ R0,TSR2

MOV R0,#19H

DJNZ R1,TSR2

#pragma endasm

void Delay_10ms(void) //延时10ms {

#pragma asm

MOV R0,#19H

MOV R1,#0C8H

TSR3:

DJNZ R0,TSR3

MOV R0,#19H

DJNZ R1,TSR3

#pragma endasm

}

void Delay_4s(void) //延时4s

{

#pragma asm

MOV R2,#28H

TSR5:

MOV R0,#0FAH

MOV R1,#0C8H

TSR4:

DJNZ R0,TSR4

MOV R0,#0FAH

DJNZ R1,TSR4

DJNZ R2,TSR5

#pragma endasm

}