求助基于89C51的，用ds18b20检测，单片机输出信号由D/A转换后电阻加热的温度控制系统 -

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char//oê¶¨òå
#define uint unsigned int
////////////////////è«¾Ö±äá¿/////////////////////////////
float TEMP_NOW=0.0;
float TEMP_SET=30.0;
uint T_Count=0;
uint S_Count=0;
uint P_Count=0;
uint N_Count=0;
uint M_Count=1;
#define K_UP 0X20//¶¨òå¼üÖμ
#define K_DOWN 0X21
#define K_CLEAR 0X24
#define K_OK 0X25
#define K_ONE 0X30
#define K_FOUR 0X31
#define K_SEVEN 0X32
#define K_POINT 0X33
#define K_TWO 0X34
#define K_FIVE 0X43
#define K_EIGHT 0X36
#define K_ZERO 0X37
#define K_THREE 0X38
#define K_SIX 0X40
#define K_NINE 0X41
#define K_SET 0X42
extern float TEMP_NOW;
extern float TEMP_SET;
extern uint T_Count;
extern uint S_Count;
extern uint P_Count;
extern uint N_Count;
extern uint M_Count;
extern uchar Current_Temp_Display_Buffer[];
extern uchar set_Temp_Display_Buffer[];
extern int sel;
sbit lcden=P2^7;//òo¾§ê1Äü
sbit lcdrs=P2^6;//òo¾§êy¾Y/ÃüáîÑ¡Ôñ¶Ë
sbit DQ =P3^7;//DS18B20êy¾Y¶Ë
sbit XX =P2^5;//¶áD′Ñ¡Ôñ¶Ë
sbit cold =P2^0;//êä3öDÅoÅ
sbit warm =P2^1;//êä3öDÅoÅ
uchar Current_Temp_Display_Buffer[]={" NOW: 0.0"};
uchar set_Temp_Display_Buffer[]= {" SET: 30.0"};
int sel=0;
uchar code KeyCodeTable[]=
{
0x11,0x12,0x14,0x18,0x21,0x22,0x24,0x28,0x41,0x42,0x44,0x48,0x81,0x82,0x84,0x88
};
#define delayNOP() {_nop_();_nop_();_nop_();_nop_();}
uchar code Temperature_Char[8] = {0x0c,0x12,0x12,0x0c,0x00,0x00,0x00,0x00};
uchar code df_Table[]={0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9};
uchar CurrentT = 0;
uchar Temp_Value[]={0x00,0x00};
uchar Display_Digit[]={0,0,0,0};
bit DS18B20_IS_OK = 1;
void Read_Temperature();
void Display_Temperature();
void Comparison();
//////////////////////¶¨ê±///////////////////////////////
void timer0_init(void)
{
TMOD = 0x00 ; //éèÖÃ¶¨ê±Æ÷0μÄ1¤×÷·½ê½
TH0 = (8192-5000)/32;//μ￥Æ¬»ú¾§ÕñÎa12MHz￡¬»úÆ÷ÖüÆúÎa1us￡¬t=5ms￡¬
//N=5000/1=5000
TL0 = (8192-5000)%32;
IE = 0x82;
TR0=1;
}
void timer0() interrupt 1
{
TH0 = (8192-5000)/32;
TL0 = (8192-5000)%32;
if(++T_Count == 100) //////100Îa0.5s
{
TR0=0;
Read_Temperature();
Display_Temperature() ;
T_Count=0;
if(++P_Count == 6)
{
N_Count=1;
}
TR0=1;
}
}
void delay1(uint z) //Ñóê±oˉêy
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com) //D′Ãüáîoˉêy
{
lcdrs=0; //Ñ¡ÔñD′ÃüáîÄ￡ê½
P0=com; //½«òaD′μÄÃüáî×ÖËíμ½êy¾Y×üÏßéÏ
delay1(5); //éÔ×÷Ñóê±òÔ′yêy¾YÎè¶¨
lcden=1; //ê1Äü¶Ë¸øò»¸ßÂö3å￡¬òòÎa3õê¼»ˉoˉêyÖDòÑ¾-½«lcdenÖÃáã
delay1(5); //éÔ×÷Ñóê±
lcden=0; //½«ê1Äü¶ËÖÃ0íê3é¸ßÂö3å
}
void write_date(uchar date) //D′êy¾Yoˉêy
{
lcdrs=1; //Ñ¡ÔñD′êy¾YÄ￡ê½
P0=date;
delay1(5);
lcden=1;
delay1(5);
lcden=0;
}
void init_lcd() //3õê¼»ˉoˉêy
{
lcden=0;
write_com(0x38); //éèÖÃ16*2ÏÔê¾￡¬5*7μãÕó￡¬8Î»êy¾Y½ó¿ú
write_com(0x0c); //éèÖÃ¿aÏÔê¾￡¬2»ÏÔê¾1a±ê
write_com(0x06); //D′ò»¸ö×Ö·ûoóμØÖ·Ö¸Õë¼ó1
write_com(0x01); //ÏÔê¾Çå0,êy¾YÖ¸ÕëÇå0
}
void Print()
{
uchar num;
write_com(0x80);
for(num=0;num<12;num++)
{
write_date(Current_Temp_Display_Buffer[num]);
}
write_date(0xdf);
write_date('C');
write_com(0x80+0x40);
for(num=0;num<12;num++)
{
write_date(set_Temp_Display_Buffer[num]);
}
write_date(0xdf);
write_date('C');
}
void Delay_INI(uint x)
{
while(--x);
}
void Delay(unsigned int n)
{
do
{
_nop_();_nop_();
_nop_();_nop_();
_nop_();_nop_();
_nop_();_nop_();
_nop_();
n--;
}while(n);
}
uchar Init_DS18B20()
{
uchar status;
DQ = 1;
Delay_INI(8);
DQ = 0;
Delay_INI(90);
DQ = 1;
Delay_INI(8);
status=DQ;
Delay_INI(100);
DQ = 1;
return status;
}
uchar ReadOneByte()
{
uchar i,dat=0;
DQ = 1;
_nop_();
for(i=0;i<8;i++)
{
DQ = 0;
dat >>= 1;
DQ = 1;
_nop_();
_nop_();
if(DQ)
dat |= 0X80;
Delay(30);
DQ = 1;
}
return dat;
}
void WriteOneByte(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
DQ = 0;
DQ = dat& 0x01;
Delay(5);
DQ = 1;
dat >>= 1;
}
}
void Read_Temperature()
{
if(Init_DS18B20()==1)
DS18B20_IS_OK=0;
else
{
WriteOneByte(0xcc);
WriteOneByte(0x44);
Init_DS18B20();
WriteOneByte(0xcc);
WriteOneByte(0xbe);
Temp_Value[0] = ReadOneByte();
Temp_Value[1] = ReadOneByte();
DS18B20_IS_OK=1;
}
}
void Display_Temperature()
{
uchar t = 150, ng = 0;
if((Temp_Value[1]&0xf8)==0xf8)
{
Temp_Value[1] = ~Temp_Value[1];
Temp_Value[0] = ~Temp_Value[0]+1;
if(Temp_Value[0]==0x00)
Temp_Value[1]++;
ng = 1;
}
Display_Digit[0] = df_Table[Temp_Value[0]&0x0f];
CurrentT = ((Temp_Value[0]&0xf0)>>4) | ((Temp_Value[1]&0x07)<<4);
Display_Digit[3] = CurrentT/100;
Display_Digit[2] = CurrentT%100/10;
Display_Digit[1] = CurrentT%10;
Current_Temp_Display_Buffer[11] = Display_Digit[0] + '0';
Current_Temp_Display_Buffer[10] = '.';
Current_Temp_Display_Buffer[9] = Display_Digit[1] + '0';
Current_Temp_Display_Buffer[8] = Display_Digit[2] + '0';
Current_Temp_Display_Buffer[7] = Display_Digit[3] + '0';
TEMP_NOW=Display_Digit[2]*10+Display_Digit[1]+Display_Digit[0]*0.1 ;
if(Display_Digit[3] == 0)
Current_Temp_Display_Buffer[7] = ' ';
if(Display_Digit[2] == 0&&Display_Digit[3]==0)
Current_Temp_Display_Buffer[8] = ' ';
if(ng)
{
TEMP_NOW=-(Display_Digit[2]*10+Display_Digit[1]+Display_Digit[0]*0.1);
if(Current_Temp_Display_Buffer[8] == ' ')
Current_Temp_Display_Buffer[8] = '-';
else if(Current_Temp_Display_Buffer[7] == ' ')
Current_Temp_Display_Buffer[7] = '-';
else
Current_Temp_Display_Buffer[6] = '-';
}
}
void Delay_key()
{
uchar i;
for(i=0;i<200;i++);
}
uchar Keys_Scan()
{
uchar sCode,kCode,k;
P1 = 0xf0;
if((P1&0xf0)!=0xf0)
{
Delay_key();
if((P1&0xf0)!=0xf0)
{
sCode = 0xfe;
for(k=0;k<4;k++)
{
P1 = sCode;
if((P1&0xf0)!=0xf0)
{
kCode = ~P1;
if(kCode == KeyCodeTable[0]) return K_ONE;
else if(kCode == KeyCodeTable[1]) return K_TWO;
else if(kCode == KeyCodeTable[2]) return K_THREE;
else if(kCode == KeyCodeTable[3]) return K_FOUR;
else if(kCode == KeyCodeTable[4]) return K_FIVE;
else if(kCode == KeyCodeTable[5]) return K_SIX;
else if(kCode == KeyCodeTable[6]) return K_SEVEN;
else if(kCode == KeyCodeTable[7]) return K_EIGHT;
else if(kCode == KeyCodeTable[8]) return K_NINE;
else if(kCode == KeyCodeTable[9]) return K_UP;
else if(kCode == KeyCodeTable[10]) return K_DOWN;
else if(kCode == KeyCodeTable[11]) return K_CLEAR;
else if(kCode == KeyCodeTable[12]) return K_OK;
else if(kCode == KeyCodeTable[13]) return K_ZERO;
else if(kCode == KeyCodeTable[14]) return K_POINT;
else if(kCode == KeyCodeTable[15]) return K_SET;
}
else
sCode = _crol_(sCode,1);
}
}
}
return -1;
}
void set_num()
{
uchar key;
if(sel==0)
{
key = Keys_Scan();
if(K_CLEAR == key)
{
while(Keys_Scan() == K_CLEAR);
set_Temp_Display_Buffer[8] =' ';
set_Temp_Display_Buffer[9] =' ';
set_Temp_Display_Buffer[10]=' ';
set_Temp_Display_Buffer[11]=' '; // 48(0)49(1)50(2)51(3)52(4)53(5)54(6)55(7)56(8)57(9)
M_Count=0;
cold=0;
warm=0;
}
if(K_UP == key)
{
while(Keys_Scan() == K_UP);
if((set_Temp_Display_Buffer[11]>47)&&(set_Temp_Display_Buffer[11]<57))
{
set_Temp_Display_Buffer[11]+=1;
}
else if(set_Temp_Display_Buffer[11]==57)
{
set_Temp_Display_Buffer[11]=48;
if((set_Temp_Display_Buffer[9]>47)&&(set_Temp_Display_Buffer[9]<57))
{
set_Temp_Display_Buffer[9]+=1;
}
else if(set_Temp_Display_Buffer[9]==57)
{
set_Temp_Display_Buffer[9]=48;
if((set_Temp_Display_Buffer[8]>47)&&(set_Temp_Display_Buffer[8]<57))
{
set_Temp_Display_Buffer[8]+=1;
}
else if(set_Temp_Display_Buffer[8]==57)
{
set_Temp_Display_Buffer[8]=48;
}
}
}
}
if(K_DOWN == key) // 48(0)49(1)50(2)51(3)52(4)53(5)54(6)55(7)56(8)57(9)
{
while(Keys_Scan() == K_DOWN);
if((set_Temp_Display_Buffer[11]>48)&&(set_Temp_Display_Buffer[11]<58))
{
set_Temp_Display_Buffer[11]-=1;
}
else if(set_Temp_Display_Buffer[11]==48)
{
set_Temp_Display_Buffer[11]=57;
if((set_Temp_Display_Buffer[9]>48)&&(set_Temp_Display_Buffer[9]<58))
{
set_Temp_Display_Buffer[9]-=1;
}
else if(set_Temp_Display_Buffer[9]==48)
{
set_Temp_Display_Buffer[9]=57;
if((set_Temp_Display_Buffer[8]>48)&&(set_Temp_Display_Buffer[8]<58))
{
set_Temp_Display_Buffer[8]-=1;
}
else if(set_Temp_Display_Buffer[8]==48)
{
set_Temp_Display_Buffer[8]=57;
}
}
}
}
if(K_ONE == key)
{
while(Keys_Scan() == K_ONE);
set_Temp_Display_Buffer[11]='1';
sel++;
}
if(K_TWO == key)
{
while(Keys_Scan() == K_TWO);
set_Temp_Display_Buffer[11]='2';
sel++;
}
if(K_THREE == key)
{
while(Keys_Scan() == K_THREE);
set_Temp_Display_Buffer[11]='3';
sel++;
}
if(K_FOUR == key)
{
while(Keys_Scan() == K_FOUR);
set_Temp_Display_Buffer[11]='4';
sel++;
}
if(K_FIVE == key)
{
while(Keys_Scan() == K_FIVE);
set_Temp_Display_Buffer[11]='5';
sel++;
}
if(K_SIX == key)
{
while(Keys_Scan() == K_SIX);
set_Temp_Display_Buffer[11]='6';
sel++;
}
if(K_SEVEN == key)
{
while(Keys_Scan() == K_SEVEN);
set_Temp_Display_Buffer[11]='7';
sel++;
}
if(K_EIGHT == key)
{
while(Keys_Scan() == K_EIGHT);
set_Temp_Display_Buffer[11]='8';
sel++;
}
if(K_NINE == key)
{
while(Keys_Scan() == K_NINE);
set_Temp_Display_Buffer[11]='9';
sel++;
}
if(K_ZERO == key)
{
while(Keys_Scan() == K_ZERO);
set_Temp_Display_Buffer[11]='0';
sel++;
}
if(K_OK == key)
{
while(Keys_Scan() == K_OK);
TEMP_SET=(set_Temp_Display_Buffer[8]-48)*10+(set_Temp_Display_Buffer[9]-48)+(set_Temp_Display_Buffer[11]-48)*0.1;
sel=0;
M_Count=1;
}
}
if(sel==1)
{
key = Keys_Scan();
if(K_CLEAR == key)
{
while(Keys_Scan() == K_CLEAR);
set_Temp_Display_Buffer[8] =' ';
set_Temp_Display_Buffer[9] =' ';
set_Temp_Display_Buffer[10]=' ';
set_Temp_Display_Buffer[11]=' ';
M_Count=0;
cold=0;
warm=0;
sel=0;
}
if(K_ONE == key)
{
while(Keys_Scan() == K_ONE);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='1';
sel++;
}
if(K_TWO == key)
{
while(Keys_Scan() == K_TWO);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='2';
sel++;
}
if(K_THREE == key)
{
while(Keys_Scan() == K_THREE);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='3';
sel++;
}
if(K_FOUR == key)
{
while(Keys_Scan() == K_FOUR);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='4';
sel++;
}
if(K_FIVE == key)
{
while(Keys_Scan() == K_FIVE);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='5';
sel++;
}
if(K_SIX == key)
{
while(Keys_Scan() == K_SIX);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='6';
sel++;
}
if(K_SEVEN == key)
{
while(Keys_Scan() == K_SEVEN);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='7';
sel++;
}
if(K_EIGHT == key)
{
while(Keys_Scan() == K_EIGHT);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='8';
sel++;
}
if(K_NINE == key)
{
while(Keys_Scan() == K_NINE);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='9';
sel++;
}
if(K_ZERO == key)
{
while(Keys_Scan() == K_ZERO);
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='0';
sel++;
}
}
if(sel==2)
{
key = Keys_Scan();
if(K_CLEAR == key)
{
while(Keys_Scan() == K_CLEAR);
set_Temp_Display_Buffer[8] =' ';
set_Temp_Display_Buffer[9] =' ';
set_Temp_Display_Buffer[10]=' ';
set_Temp_Display_Buffer[11]=' ';
M_Count=0;
cold=0;
warm=0;
sel=0;
}
if(K_POINT == key)
{
while(Keys_Scan() == K_POINT);
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='.';
sel++;
}
}
if(sel==3)
{
key = Keys_Scan();
if(K_CLEAR == key)
{
while(Keys_Scan() == K_CLEAR);
set_Temp_Display_Buffer[8] =' ';
set_Temp_Display_Buffer[9] =' ';
set_Temp_Display_Buffer[10]=' ';
set_Temp_Display_Buffer[11]=' ';
M_Count=0;
cold=0;
warm=0;
sel=0;
}
if(K_ONE == key)
{
while(Keys_Scan() == K_ONE);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='1';
sel++;
}
if(K_TWO == key)
{
while(Keys_Scan() == K_TWO);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='2';
sel++;
}
if(K_THREE == key)
{
while(Keys_Scan() == K_THREE);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='3';
sel++;
}
if(K_FOUR == key)
{
while(Keys_Scan() == K_FOUR);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='4';
sel++;
}
if(K_FIVE == key)
{
while(Keys_Scan() == K_FIVE);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='5';
sel++;
}
if(K_SIX == key)
{
while(Keys_Scan() == K_SIX);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='6';
sel++;
}
if(K_SEVEN == key)
{
while(Keys_Scan() == K_SEVEN);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='7';
sel++;
}
if(K_EIGHT == key)
{
while(Keys_Scan() == K_EIGHT);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='8';
sel++;
}
if(K_NINE == key)
{
while(Keys_Scan() == K_NINE);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='9';
sel++;
}
if(K_ZERO == key)
{
while(Keys_Scan() == K_ZERO);
set_Temp_Display_Buffer[8]=set_Temp_Display_Buffer[9] ;
set_Temp_Display_Buffer[9]=set_Temp_Display_Buffer[10] ;
set_Temp_Display_Buffer[10]=set_Temp_Display_Buffer[11] ;
set_Temp_Display_Buffer[11]='0';
sel++;
}
}
if(sel==4)
{
key = Keys_Scan();
if(K_CLEAR == key)
{
while(Keys_Scan() == K_CLEAR);
set_Temp_Display_Buffer[8] =' ';
set_Temp_Display_Buffer[9] =' ';
set_Temp_Display_Buffer[10]=' ';
set_Temp_Display_Buffer[11]=' ';
M_Count=0;
cold=0;
warm=0;
sel=0;
}
if(K_OK == key)
{
while(Keys_Scan() == K_OK);
TEMP_SET=(set_Temp_Display_Buffer[8]-48)*10+(set_Temp_Display_Buffer[9]-48)+(set_Temp_Display_Buffer[11]-48)*0.1;
sel=0;
M_Count=1;
}
}
}
////////////////////Ö÷3ìDò///////////////////////////////
void main()
{
init_lcd();
Init_DS18B20();
timer0_init();
while(1)
{
Print();
set_num();
Comparison();
}
}
void Comparison()
{
if(N_Count&&M_Count)
{
if(TEMP_NOW<TEMP_SET)
{
warm=1;
cold=0;
}
if(TEMP_NOW>TEMP_SET)
{
cold=1;
warm=0;
}
if(TEMP_NOW==TEMP_SET)
{
cold=0;
warm=0;
}
}
}

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