/*-------------------------------

溫度控制器V1.5
顯示為三個(gè)共陽極LED
溫度傳感器用單總線DS18B20
CPU為2051，四個(gè)按鍵，分別為UP，DOWN，SET
溫度調(diào)節(jié)上限為125度，下限為-55度
只能用于單只18B20

本軟件僅供學(xué)習(xí)與參考，引用時(shí)請(qǐng)注明版權(quán)

http://www.cdle.net /> 明浩　2004/1/2
pnzwzw@cdle.net
-------------------------------*/

#include
#include
#define Key_UP P3_0 //上調(diào)溫度
#define Key_DOWN P3_1 //下調(diào)溫度
#define Key_SET P1_7 //設(shè)定鍵（溫度設(shè)定，長(zhǎng)按開電源）
#define RelayOutPort P3_5 //繼電器輸出
#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（個(gè)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筆劃,0xFF為空,0xF7為負(fù)號(hào)

static unsigned char bdata StateREG; //可位尋址的狀態(tài)寄存器
sbit DS1820ON = StateREG^0; //DS1820是否存在
sbit SetTF = StateREG^1; //是否是在溫度設(shè)置狀態(tài)
sbit KeySETDown = StateREG^2; //是否已按過SET鍵標(biāo)識(shí)
sbit PowTF = StateREG^3; //電源電源標(biāo)識(shí)
sbit KeyTF = StateREG^4; //鍵盤是否允許

//sbit KeySETDowning = StateREG^5; //SET是否正在按下
static unsigned char bdata TLV _at_ 0x0029; //溫度變量高低位
static unsigned char bdata THV _at_ 0x0028;
static signed char TMV; //轉(zhuǎn)換后的溫度值
static unsigned char KeyV,TempKeyV; //鍵值
static signed char TMRomV _at_ 0x0027; //高溫限制
static signed char TMSetV _at_ 0x0026; //溫度設(shè)定值
static unsigned char KSDNum; //SET鍵連按時(shí)的采集次數(shù)
static unsigned char IntNum,IntNum2,IntNum3; //中斷發(fā)生次數(shù)，IntNum用于SET長(zhǎng)按檢測(cè)，IntNum2用于設(shè)定狀態(tài)時(shí)LED閃爍
static signed char LED_One,LED_Two,LED_Three; //LED的顯示位 LED_One為十位，LED_Two為個(gè)位
static unsigned char Sign; //負(fù)號(hào)標(biāo)識(shí)

void main(void)
{
void InitDS1820(void); //定義函數(shù)
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; //初始化變量
SetTF = 1;
PowTF = 1; //關(guān)電源
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(); //跳過ROM
TMERDS1820(); //E2PRAM中溫度上限值調(diào)入RAM
InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMRDS1820(); //讀出溫度指令
ReadDS1820(); //讀出溫度值和上限值
TMSetV = TMRomV; //拷貝保存在DS18B20ROM里的上限值到TMSetV

EA = 1; //允許CPU中斷
ET0 = 1; //定時(shí)器0中斷打開
TMOD = 0x1; //設(shè)定時(shí)器0為模式1，16位模式
TH0=0xB1;
TL0=0xDF; //設(shè)定時(shí)值為20000us（20ms）
TR0 = 1; //開始定時(shí)
while(1);
}

//定時(shí)器0中斷外理中鍵掃描和顯示
void KeyAndDis_Time0(void) interrupt 1 using 2
{
TH0=0xB1;
TL0=0xDF; //設(shè)定時(shí)值為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) //有鍵按下
{
Delay_10ms(); //延時(shí)防抖 按下10ms再測(cè)
if (!Key_UP)
TempKeyV = 1;
if (!Key_DOWN)
TempKeyV = 2;
if (!Key_SET)
TempKeyV = 3;
if (KeyV == TempKeyV) //兩次值相等為確定接下了鍵
{
if (KeyV == 3) //按下SET鍵，如在SET狀態(tài)就退出，否則進(jìn)入
{
//KeySETDowning = 1; //表明SET正在按下
PowTF = 0; //電源標(biāo)識(shí)開
if (!KeyTF)
if (SetTF)
{
SetTF = 0; //標(biāo)識(shí)位標(biāo)識(shí)退出設(shè)定
InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMWDS1820(); //寫溫度上限指令
WriteDS1820(); //寫溫度上限到DS18B20ROM
WriteDS1820(); //寫溫度上限到DS18B20ROM
WriteDS1820(); //寫溫度上限到DS18B20ROM
InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMREDS1820(); //溫度上限值COPY回E2PRAM
}
else
SetTF = 1;
if (!KeySETDown) //沒有第一次按下SET時(shí)，KeySETDown標(biāo)識(shí)置1
KeySETDown = 1;
else
KSDNum = KSDNum + 1; //前一秒內(nèi)有按過SET則開始計(jì)數(shù)
}
if (SetTF) //在SET狀態(tài)下
{
if ((KeyV == 1) && (!KeyTF))
TMSetV = TMSetV + 1; //上調(diào)溫度
if ((KeyV == 2) && (!KeyTF))
TMSetV = TMSetV - 1; //下調(diào)溫度
if (TMSetV <= -55) //限制溫度上下限
TMSetV = -55;
if (TMSetV >= 125)
TMSetV = 125;
}
if ((!KeyTF) && (IntNum3 == 0)) KeyTF = 1; //當(dāng)鍵盤處于可用時(shí)，鎖定
}

if (KeySETDown) //在2秒內(nèi)按下了SET則計(jì)中斷發(fā)生次數(shù)用于長(zhǎng)按SET時(shí)計(jì)時(shí)用
IntNum = IntNum + 1;
if (IntNum > 55) //中斷發(fā)生了55次時(shí)（大約1.2秒）75為1.5秒左右
{
IntNum = 0;
KeySETDown = 0;
if (KSDNum == 55) //如一直長(zhǎng)按了SET1.2秒左右
{
RelayOutPort = 1; //關(guān)閉繼電器輸出
PowTF = 1; //電源標(biāo)識(shí)關(guān)
LEDOneC = 0;
LEDTwoC = 0;
LEDThreeC = 0;
LEDPort = 0xBF; //顯示"--"
Delay_4s(); //延時(shí)
LEDOneC = 1;
LEDTwoC = 1; //關(guān)顯示
LEDThreeC = 1;
Delay_4s();
IntNum = 0;
IntNum2 = 0;
IntNum3 = 0;
}
KSDNum = 0;
}
}
KeyV = 0;
TempKeyV = 0; //清空變量準(zhǔn)備下次鍵掃描

if (!PowTF)
{
InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMVDS1820(); //溫度轉(zhuǎn)換指令

Delay_510();
Delay_510(); //延時(shí)等待轉(zhuǎn)換完成

InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMRDS1820(); //讀出溫度指令
ReadDS1820(); //讀出溫度值

V2ToV(); //轉(zhuǎn)換顯示值
if (TMV > TMSetV) //根據(jù)采集到的溫度值控制繼電器
{
RelayOutPort = 0;
}
else
{
RelayOutPort = 1;
}

if (SetTF) IntNum2 = IntNum2 + 1; //用于閃爍計(jì)數(shù)
if (IntNum2 > 50 ) IntNum2 = 0;
if (KeyTF) IntNum3 = IntNum3 + 1; //用于防止按鍵連按
if (IntNum3 > 25)
{
IntNum3 = 0;
KeyTF = 0;
}

if ((SetTF) && (IntNum2 < 25)) goto InitEnd; //計(jì)數(shù)在后半段時(shí)顯示
LEDPort = LED_One;
LEDOneC = 0;
Delay_510();
LEDOneC = 1; //顯示百位數(shù)
LEDPort = LED_Two;
LEDTwoC = 0;
Delay_510();
LEDTwoC = 1; //顯示十位數(shù)
LEDPort = LED_Three;
LEDThreeC = 0;
Delay_510();
LEDThreeC = 1; //顯示個(gè)位數(shù)
}
InitEnd:;
}

void V2ToV(void) //數(shù)值轉(zhuǎn)換
{
TLV = TLV >> 4;
THV = THV << 4; //讀出的高低位數(shù)值移位
TMV = TLV | THV; //合并高低位放入TM為實(shí)際溫度值
Sign = 0;
if (SetTF || !Key_SET)
Sign = TMSetV >> 7; //取符號(hào)
else
Sign = TMV >> 7;

if (Sign)
{
if (SetTF || !Key_SET)
{
LED_One = (~(TMSetV-1)) / 100; //SET狀態(tài)下顯示設(shè)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; //轉(zhuǎn)換百位值
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狀態(tài)下顯示設(shè)定值
LED_Two = (TMSetV - LED_One * 100)/10;
LED_Three = TMSetV - LED_One * 100 - LED_Two * 10;
}
else
{
LED_One = (TMV) / 100; //轉(zhuǎn)換百位值
LED_Two = (TMV - LED_One * 100)/10;
LED_Three = TMV - LED_One * 100 - LED_Two * 10;
}
}

//轉(zhuǎn)LED字段
if (LED_One) //超過百時(shí)十位的處理
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_(); //保持一個(gè)周期
TMPort = 0; //拉低TMPort
Delay_510(); //延時(shí) DS1820復(fù)位時(shí)間要500us的低電平
TMPort = 1; //拉高TMPort
_nop_(); //保持
_nop_();
_nop_();

Delay_110(); //延時(shí)110us 等待DS1820回應(yīng)
if (!TMPort) //回應(yīng)信號(hào)為低電平
DS1820ON = 1;
else
DS1820ON = 0;
Delay_110(); //延時(shí)
Delay_110();
TMPort = 1; //拉高TMPort
}

void ROMDS1820(void) //跳過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) //溫度轉(zhuǎn)換指令
{
#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) //讀出溫度指令
{
#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) //寫入溫度限制指令
{
#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,$
RRC A
MOV P3_7,C
MOV R3,#23
DJNZ R3,$
SETB P3_7
NOP
DJNZ R2,WR43
SETB P3_7
#pragma endasm
}

void WriteDS1820(void) //寫入溫度限制值
{
#pragma asm
MOV A,26H //發(fā)出4EH寫ROM指令后連發(fā)兩個(gè)字節(jié)分別為上下限
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) //讀出溫度值
{
#pragma asm
MOV R4,#3 ; 將溫度高位和低位，高溫限制位從DS18B20中讀出
MOV R1,#29H ; 低位存入29H(TEMPER_L),高位存入28H(TEMPER_H)，高溫限制位存入27H(TMRomV)
RE00:
MOV R2,#8
RE01:
CLR C
SETB P3_7
NOP
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) //延時(shí)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) //延時(shí)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) //延時(shí)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) //延時(shí)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
}