Hset=25;
if(key2==0)
display_delay(Hset,20);
if(key2==0)
Hset++;
if(key3==0)
display_delay(Hset,20);
if(key3==0)
Hset--;
display(Hset);
if(key4==0)break;
}
while
(1)
{
if(Lset<=0||Lset>=100||Lset>Hset)
Lset=10;
if(key2==0)
display_delay(Lset,20);
if(key2==0)
Lset++;
if(key3==0)
display_delay(Lset,20);
if(key3==0)
Lset--;
display_delay(Lset,20);
if(key4==0)break;
}
key1=1;
if(key4==0)break;
}
}
/*************************此部分为18B20的驱动程序*************************************/
#include
#include
sbitD18B20=P3^7;
#defineNOP()_nop_()/*定义空指令*/
#define_Nop()_nop_()/*定义空指令*/
voidTempDelay(unsignedcharidataus);
voidInit18b20(void);
voidWriteByte(unsignedcharidatawr);//单字节写入
voidread_bytes(unsignedcharidataj);
unsignedcharCRC(unsignedcharj);
voidGemTemp(void);
voidConfig18b20(void);
voidReadID(void);
voidTemperatuerResult(void);
bitflag;
unsignedintidataTemperature;
unsignedcharidatatemp_buff[9];//存储读取的字节,readscratchpad为9字节,readromID为8字节
unsignedcharidataid_buff[8];
unsignedcharidata*p,TIM;
unsignedcharidatacrc_data;
unsignedcharcodeCrcTable[256]={
0,94,188,226,97,63,221,131,194,156,126,32,163,253,31,65,
157,195,33,127,252,162,64,30,95,1,227,189,62,96,130,220,
35,125,159,193,66,28,254,160,225,191,93,3,128,222,60,98,
190,224,2,92,223,129,99,61,124,34,192,158,29,67,161,255,
70,24,250,164,39,121,155,197,132,218,56,102,229,187,89,7,
219,133,103,57,186,228,6,88,25,71,165,251,120,38,196,154,
101,59,217,135,4,90,184,230,167,249,27,69,198,152,122,36,
248,166,68,26,153,199,37,123,58,100,134,216,91,5,231,185,
140,210,48,110,237,179,81,15,78,16,242,172,47,113,147,205,
17,79,173,243,112,46,204,146,211,141,111,49,178,236,14,80,
175,241,19,77,206,144,114,44,109,51,209,143,12,82,176,238,
50,108,142,208,83,13,239,177,240,174,76,18,145,207,45,115,
202,148,118,40,171,245,23,73,8,86,180,234,105,55,213,139,
87,9,235,181,54,104,138,212,149,203,41,119,244,170,72,22,
233,183,85,11,136,214,52,106,43,117,151,201,74,20,246,168,
116,42,200,150,21,75,169,247,182,232,10,84,215,137,107,53};
//
/************************************************************
*Function:
延时处理
*parameter:
*Return:
*Modify:
*************************************************************/
voidTempDelay(unsignedcharidataus)
{
while(us--);
}
/************************************************************
*Function:
18B20初始化
*parameter:
*Return:
*Modify:
*************************************************************/
voidInit18b20(void)
{
D18B20=1;
_nop_();
D18B20=0;
TempDelay(80);//delay530uS//80
_nop_();
D18B20=1;
TempDelay(14);//delay100uS//14
_nop_();
_nop_();
_nop_();
if(D18B20==0)
flag=1;//detect1820success!
else
flag=0;//detect1820fail!
TempDelay(20);//20
_nop_();
_nop_();
D18B20=1;
}
/************************************************************
*Function:
向18B20写入一个字节
*parameter:
*Return:
*Modify:
*************************************************************/
voidWriteByte(unsignedcharidatawr)//单字节写入
{
unsignedcharidatai;
for(i=0;i<8;i++)
{
D18B20=0;
_nop_();
D18B20=wr&0x01;
TempDelay(3);//delay45uS//5
_nop_();
_nop_();
D18B20=1;
wr>>=1;
}
}
/************************************************************
*Function:
读18B20的一个字节
*parameter:
*Return:
*Modify:
*************************************************************/
unsignedcharReadByte(void)//读取单字节
{
unsignedcharidatai,u=0;
for(i=0;i<8;i++)
{
D18B20=0;
u>>=1;
D18B20=1;
if(D18B20==1)
u|=0x80;
TempDelay
(2);
_nop_();
}
return(u);
}
/************************************************************
*Function:
读18B20
*parameter:
*Return:
*Modify:
*************************************************************/
voidread_bytes(unsignedcharidataj)
{
unsignedcharidatai;
for(i=0;i{
*p=ReadByte();
p++;
}
}
/************************************************************
*Function:
CRC校验
*parameter:
*Return:
*Modify:
*************************************************************/
unsignedcharCRC(unsignedcharj)
{
unsignedcharidatai,crc_data=0;
for(i=0;icrc_data=CrcTable[crc_data^temp_buff[i]];
return(crc_data);
}
/************************************************************
*Function:
读取温度
*parameter:
*Return:
*Modify:
*************************************************************/
voidGemTemp(void)
{
read_bytes(9);
if(CRC(9)==0)//校验正确
{
Temperature=temp_buff[1]*0x100+temp_buff[0];
//Temperature*=0.625;
Temperature/=16;
TempDelay
(1);
}
}
/************************************************************
*Function:
内部配置
*parameter:
*Return:
*Modify:
*************************************************************/
voidConfig18b20(void)//重新配置报警限定值和分辨率
{
Init18b20();
WriteByte(0xcc);//skiprom
WriteByte(0x4e);//writescratchpad
WriteByte(0x19);//上限
WriteByte(0x1a);//下限
WriteByte(0x7f);//set11bit(0.125)
Init18b20();
WriteByte(0xcc);//skiprom
WriteByte(0x48);//保存设定值
Init18b20();
WriteByte(0xcc);//skiprom
WriteByte(0xb8);//回调设定值
}
/************************************************************
*Function:
读18B20ID
*parameter:
*Return:
*Modify:
*************************************************************/
voidReadID(void)//读取器件id
{
Init18b20();
WriteByte(0x33);//readrom
read_bytes(8);
}
/************************************************************
*Function:
18B20ID全处理
*parameter:
*Return:
*Modify:
*************************************************************/
voidTemperatuerResult(void)
{
p=id_buff;
ReadID();
Config18b20();
Init18b20();
WriteByte(0xcc);//skiprom
WriteByte(0x44);//Temperatureconvert
Init18b20();
WriteByte(0xcc);//skiprom
WriteByte(0xbe);//readTemperature
p=temp_buff;
GemTemp();
}
voidGetTemp()
{
if(TIM==100)//每隔1000ms读取温度
{TIM=0;
TemperatuerResult();
}
}
/*************************************
[t1(10ms)中断]中断
*************************************/
voidT1zd(void)interrupt3
{
TH1=0xD8;//10
TL1=0xF0;
TIM++;
}