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#include <reg52.H>
#include <intrins.H>
#include <stdio.h>
#include <math.H>
#define uchar unsigned char
#define uint unsigned int
sbit rw = P2^6;
sbit RS = P2^5;
sbit LCDEN = P2^7;
/**//*****************************LCD1602*******************************/
void delayUs()
{
_nop_();
}
void delayMs(uint a)
{
uint i, j;
for(i = a; i > 0; i--)
for(j = 100; j > 0; j--);
}
void writeComm(uchar comm)
{
RS = 0;
P0 = comm;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
//D′êy¾Y:RS=1, RW=0;
void writeData(uchar dat)
{
RS = 1;
P0 = dat;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
void init()
{
rw = 0;
writeComm(0x38);
writeComm(0x0c);
writeComm(0x06);
writeComm(0x01);
}
void writeString(uchar * str, uchar length)
{
uchar i;
for(i = 0; i < length; i++)
{
writeData(str[i]);
}
}
/**//*****************************DS18B20*******************************/
sbit ds = P2^4;
unsigned char Now_Tem;
void dsInit()
{
unsigned int i;
ds = 0;
i = 100;
while(i>0) i--;
ds = 1;
i = 4;
while(i>0) i--;
}
void dsWait()
{
unsigned int i;
while(ds);
while(~ds);
i = 4;
while(i > 0) i--;
}
bit readBit()
{
unsigned int i;
bit b;
ds = 0;
i++;
ds = 1;
i++; i++;
b = ds;
i = 8;
while(i>0) i--;
return b;
}
unsigned char readByte()
{
unsigned int i;
unsigned char j, dat;
dat = 0;
for(i=0; i<8; i++)
{
j = readBit();
dat = (j << 7) | (dat >> 1);
}
return dat;
}
void writeByte(unsigned char dat)
{
unsigned int i;
unsigned char j;
bit b;
for(j = 0; j < 8; j++)
{
b = dat & 0x01;
dat >>= 1;
if(b)
{
ds = 0;i++; i++;
ds = 1;
i = 8; while(i>0) i--;
}
else
{
ds = 0;
i = 8; while(i>0) i--;
ds = 1;
i++; i++;
}
}
}
void sendChangeCmd()
{
dsInit();
dsWait();
delayMs(1);
writeByte(0xcc);
writeByte(0x44);
}
void sendReadCmd()
{
dsInit();
dsWait();
delayMs(1);
writeByte(0xcc);
writeByte(0xbe);
}
int getTmpValue()
{
unsigned int tmpvalue;
int value;
float t;
unsigned char low, high;
sendReadCmd();
low = readByte();
high = readByte();
tmpvalue = high;
tmpvalue <<= 8;
tmpvalue |= low;
value = tmpvalue;
t = value * 0.0625;
value = t * 100 + (value > 0 ? 0.5 : -0.5); //′óóú0¼ó0.5, D¡óú0¼õ0.5
return value;
}
void display(int v)
{
unsigned char count;
unsigned char datas[] = {' ', 0, 0};
unsigned char table0[]=0xdf;
unsigned char table1[] = "C";
unsigned int tmp = abs(v);
datas[1] = tmp % 10000 / 1000;
datas[2] = tmp % 1000 / 100;
Now_Tem = datas[1]*10+ datas[2]; //á½Î»ÏÖÔúζè
writeComm(0xc0+12);
for(count = 1; count != 3; count++)
{
writeData('0'+datas[count]);
}
writeString(table0,1);//μ￥λ
writeString(table1,1);
writeComm(0x80+14);
writeString(table0,1);//μ￥λ
writeString(table1,1);
writeComm(0xc0+12);//¸öλê±Ïûè￥¿Õ¸ñ
if(datas[1] == 0)
{
writeData(datas[0]);
}
}
/**//*****************************°′¼ü*******************************/
sbit Key1=P1^0;
sbit Key2=P1^1;
unsigned char Set_Tem=75; //á½Î»é趨ζè
void Key_Scan(void)
{
unsigned char datas[] = {' ', 0, 0};
unsigned char count;
if(Key1 == 0)
{
delayMs(5);
if(Key1 == 0)
{
Set_Tem++;
}
if(Set_Tem>=100)Set_Tem=0;
}
if(Key2 == 0)
{
delayMs(5);
if(Key2 == 0)
{
Set_Tem--;
}
if(Set_Tem<=0)Set_Tem=0;
}
datas[1] = Set_Tem / 10;
datas[2] = Set_Tem % 10;
writeComm(0x80+12);
for(count = 1; count != 3; count++)
{
writeData('0'+datas[count]);
}
writeComm(0x80+12);//¸öλê±Ïûè￥¿Õ¸ñ
if(datas[1] == 0)
{
writeData(datas[0]);
}
}
/**//*****************************Ä￡·ÂPID*******************************/
uchar H_Time;
sbit PWM = P1^4;
void ComTemper()
{
if(Set_Tem>Now_Tem)
{
if(Set_Tem-Now_Tem>=10)
{
H_Time=100;
}
else
{
if(Set_Tem-Now_Tem==9)
H_Time=90;
if(Set_Tem-Now_Tem==8)
H_Time=80;
if(Set_Tem-Now_Tem==7)
H_Time=70;
if(Set_Tem-Now_Tem==6)
H_Time=60;
if(Set_Tem-Now_Tem==5)
H_Time=50;
if(Set_Tem-Now_Tem==4)
H_Time=40;
if(Set_Tem-Now_Tem==3)
H_Time=30;
if(Set_Tem-Now_Tem==2)
H_Time=20;
if(Set_Tem-Now_Tem==1)
H_Time=10;
}
}
else
{
H_Time=0;
}
}
/**//*****************************′®¿ú*******************************/
/*****************************************************
//′®¿ú·￠Ëíò»¸ö×Ö·û
/*****************************************************/
void Send_Uart(unsigned char value)//μ￥Ƭ»úêy¾Y·￠Ëí
{
ES=0; //′®¿úÖD¶Ï1رÕ
TI=0;
SBUF=value; //½«êy¾Y·Åèë′®¿ú¼Ä′æÆ÷
while(!TI);
TI=0; //èí¼tÇåáã
ES=1; //′ò¿a′®¿úÖD¶Ï
}
///*****************************************************
////·￠Ëí×Ö·û′®
///*****************************************************/
//void PT(char *puf)
// {
// while(*puf!='\0')
// {
// Send_Uart(*puf);
// puf++;
// delayMs(2);
// }
// }
void main()
{
uchar table1[] = "Set_Tem:";
uchar table2[] = "Now_Tem:";
uint a,c;
TMOD=0x01;//¶¨ê±Æ÷1¤×÷óú·½ê½1
TH0=(65536-1000)/256;//¶¨ê±Æ÷¸33õÖμ
TL0=(65536-1000)%256;
ET0=1;//¿a¶¨ê±ÖD¶Ï
TR0=1;//Æô¶ˉ¶¨ê±
SCON=0x50; //é趨′®¿ú1¤×÷·½ê½ 1
PCON=0x00; //2¨ìØÂê2»±¶Ôö
TMOD|=0x20; //¶¨ê±Æ÷11¤×÷óú8λ×Ô¶ˉÖØÔØÄ￡ê½, óÃóú2úéú2¨ìØÂê
TL1=0xfd;
TH1=0xfd; //2¨ìØÂê9600
TR1=1; //′ò¿a¶¨ê±Æ÷1
EA=1; //ÔêDí×üÖD¶Ï
sendChangeCmd();
init();
writeComm(0x80);
writeString(table1,8);
writeComm(0xc0);
writeString(table2,8);
while(1)
{
a=Set_Tem;//êy¾Y×a»»
c=Now_Tem;
delayMs(1000); //ζè×a»»ê±¼äDèòa750msòÔéÏ
display(getTmpValue());
Key_Scan();
sendChangeCmd();
TI=1;
printf("Now_Tem:%déãê϶è\n",c);
delayMs(4);
TI=1;
printf("Set_Tem:%déãê϶è\r\n",a);
}
}
/**********************T0ÖD¶Ï·tÎñ3ìDò*******************/
void timer0(void)interrupt 1 using 1
{
static uchar count;
TH0=(65536-1000)/256;
TL0=(65536-1000)%256;
ComTemper();
count++;
count=count%100;//10msÖüÆú
if(count<=H_Time)
PWM=1;
else
PWM=0;
}
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