#include <AT89X051.H>
#include <intrins.h>
#define Key_UP P3_0 //上調溫度
#define Key_DOWN P3_1 //下調溫度
#define Key_SET P1_7 //設定鍵（溫度設定，長按開電源）
#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為負號
static unsigned char bdata StateREG; //可位尋址的狀態寄存器
sbit DS1820ON = StateREG^0; //DS1820是否存在
sbit SetTF = StateREG^1; //是否是在溫度設置狀態
sbit KeySETDown = StateREG^2; //是否已按過SET鍵標識
sbit PowTF = StateREG^3; //電源電源標識
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; //溫度設定值
static unsigned char KSDNum; //SET鍵連按時的采集次數
static unsigned char IntNum,IntNum2,IntNum3; //中斷發生次數，IntNum用于SET長按檢測，IntNum2用于設定狀態時LED閃爍
static signed char LED_One,LED_Two,LED_Three; //LED的顯示位 LED_One為十位，LED_Two為個位
static unsigned char Sign; //負號標識
void main(void)
{
void InitDS1820(void); //定義函數
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; //定時器0中斷打開
TMOD = 0x1; //設定時器0為模式1，16位模式
TH0=0xB1;
TL0=0xDF; //設定時值為20000us（20ms）
TR0 = 1; //開始定時
while(1);
}
//定時器0中斷外理中鍵掃描和顯示
void KeyAndDis_Time0(void) interrupt 1 using 2
{
TH0=0xB1;
TL0=0xDF; //設定時值為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(); //延時防抖 按下10ms再測
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狀態就退出，否則進入
{
//KeySETDowning = 1; //表明SET正在按下
PowTF = 0; //電源標識開
if (!KeyTF)
if (SetTF)
{
SetTF = 0; //標識位標識退出設定
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，KeySETDown標識置1
KeySETDown = 1;
else
KSDNum = KSDNum + 1; //前一秒內有按過SET則開始計數
}
if (SetTF) //在SET狀態下
{
if ((KeyV == 1) && (!KeyTF))
TMSetV = TMSetV + 1; //上調溫度
if ((KeyV == 2) && (!KeyTF))
TMSetV = TMSetV - 1; //下調溫度
if (TMSetV <= -55) //限制溫度上下限
TMSetV = -55;
if (TMSetV >= 125)
TMSetV = 125;
}
if ((!KeyTF) && (IntNum3 == 0)) KeyTF = 1; //當鍵盤處于可用時，鎖定
}
if (KeySETDown) //在2秒內按下了SET則計中斷發生次數用于長按SET時計時用
IntNum = IntNum + 1;
if (IntNum > 55) //中斷發生了55次時（大約1.2秒）75為1.5秒左右
{
IntNum = 0;
KeySETDown = 0;
if (KSDNum == 55) //如一直長按了SET1.2秒左右
{
RelayOutPort = 1; //關閉繼電器輸出
PowTF = 1; //電源標識關
LEDOneC = 0;
LEDTwoC = 0;
LEDThreeC = 0;
LEDPort = 0xBF; //顯示"--"
Delay_4s(); //延時
LEDOneC = 1;
LEDTwoC = 1; //關顯示
LEDThreeC = 1;
Delay_4s();
IntNum = 0;
IntNum2 = 0;
IntNum3 = 0;
}
KSDNum = 0;
}
}
KeyV = 0;
TempKeyV = 0; //清空變量準備下次鍵掃描
if (!PowTF)
{
InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMVDS1820(); //溫度轉換指令
Delay_510();
Delay_510(); //延時等待轉換完成
InitDS1820(); //初始化
ROMDS1820(); //跳過ROM
TMRDS1820(); //讀出溫度指令
ReadDS1820(); //讀出溫度值
V2ToV(); //轉換顯示值
if (TMV > TMSetV) //根據采集到的溫度值控制繼電器
{
RelayOutPort = 0;
}
else
{
RelayOutPort = 1;
}
if (SetTF) IntNum2 = IntNum2 + 1; //用于閃爍計數
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; //計數在后半段時顯示
LEDPort = LED_One;
LEDOneC = 0;
Delay_510();
LEDOneC = 1; //顯示百位數
LEDPort = LED_Two;
LEDTwoC = 0;
Delay_510();
LEDTwoC = 1; //顯示十位數
LEDPort = LED_Three;
LEDThreeC = 0;
Delay_510();
LEDThreeC = 1; //顯示個位數
}
InitEnd:;
}
void V2ToV(void) //數值轉換
{
TLV = TLV >> 4;
THV = THV << 4; //讀出的高低位數值移位
TMV = TLV | THV; //合并高低位放入TM為實際溫度值
Sign = 0;
if (SetTF || !Key_SET)
Sign = TMSetV >> 7; //取符號
else
Sign = TMV >> 7;
if (Sign)
{
if (SetTF || !Key_SET)
{
LED_One = (~(TMSetV-1)) / 100; //SET狀態下顯示設定值
LED_Two = ((~(TMSetV-1)) - LED_One * 100)/10;
LED_Three = (~(TMSetV-1)) - LED_One * 100 - LED_Two * 10;
}
else
{
LED_One = (~(TMV-1)) / 100; //轉換百位值
LED_Two = ((~(TMV-1)) - LED_One * 100)/10;
LED_Three = (~(TMV-1)) - LED_One * 100 - LED_Two * 10;
}
}
else
{
if (SetTF || !Key_SET)
{
LED_One = (TMSetV) / 100; //SET狀態下顯示設定值
LED_Two = (TMSetV - LED_One * 100)/10;
LED_Three = TMSetV - LED_One * 100 - LED_Two * 10;
}
else
{
LED_One = (TMV) / 100; //轉換百位值
LED_Two = (TMV - LED_One * 100)/10;
LED_Three = TMV - LED_One * 100 - LED_Two * 10;
}
}
//轉LED字段
if (LED_One) //超過百時十位的處理
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_(); //保持一個周期
TMPort = 0; //拉低TMPort
Delay_510(); //延時 DS1820復位時間要500us的低電平
TMPort = 1; //拉高TMPort
_nop_(); //保持
_nop_();
_nop_();
Delay_110(); //延時110us 等待DS1820回應
if (!TMPort) //回應信號為低電平
DS1820ON = 1;
else
DS1820ON = 0;
Delay_110(); //延時
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 //發出4EH寫ROM指令后連發兩個字節分別為上下限
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
}
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