久久久久久久999_99精品久久精品一区二区爱城_成人欧美一区二区三区在线播放_国产精品日本一区二区不卡视频_国产午夜视频_欧美精品在线观看免费

標(biāo)題: 溫度采集DS18B20(LCD) [打印本頁]

作者: TYS5262217 時間: 2020-7-8 04:58
標(biāo)題: 溫度采集DS18B20(LCD)
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int

sbit DQ = P3^6; //DS18B20數(shù)據(jù)口
uchar FLAG=0; //正負(fù)溫度標(biāo)志

unsigned char TMPH,TMPL;

//這三個引腳參考資料
sbit E=P2^7; //1602使能引腳
sbit RW=P2^6; //1602讀寫引腳
sbit RS=P2^5; //1602數(shù)據(jù)/命令選擇引腳

void delay_1()
{
int i,j;
for(i=0; i<=10; i++)
for(j=0; j<=2; j++)
;
}

// 1602命令函數(shù)
void enable(uchar del)
{
P0 = del;
RS = 0;
RW = 0;
E = 0;
delay_1();
E = 1;
delay_1();
}

void write(uchar del)
{
P0 =del;
RS = 1;
RW = 0;
E = 0;
delay_1();
E = 1;
delay_1();
}

// 1602初始化，請參考1602的資料
void L1602_init(void)
{
enable(0x01);
enable(0x38);
enable(0x0c);
enable(0x06);
enable(0xd0);
}

//改變液晶中某位的值，如果要讓第一行，第五個字符顯示"b" ，調(diào)用該函數(shù)如下 L1602_char(1,5,'b')
void L1602_char(uchar hang,uchar lie,char sign)
{
uchar a;
if(hang == 1) a = 0x80;
if(hang == 2) a = 0xc0;
a = a + lie - 1;
enable(a);
write(sign);
}

//改變液晶中某位的值，如果要讓第一行，第五個字符開始顯示"ab cd ef" ，調(diào)用該函數(shù)如下L1602_string(1,5,"ab cd ef;")
void L1602_string(uchar hang,uchar lie,uchar *p)
{
uchar a;
if(hang == 1) a = 0x80;
if(hang == 2) a = 0xc0;
a = a + lie - 1;
enable(a);
while(1)
{
if(*p == '\0') break;
write(*p);
p++;
}
}

void delay(uint N)
{
int i;
for(i=0; i<N; i++)
;
}

Init_Ds18b20()
{
bit Status_Ds18b20;
DQ=1;
DQ=0;
delay(250);
DQ=1;
delay(20);
if(!DQ)
 Status_Ds18b20=0;
else
 Status_Ds18b20=1;
delay(250);
DQ=1;
return Status_Ds18b20;
}
uchar Read_Ds18b20()
{
uchar i=0,dat=0;
for(i=0;i<8;i++)
 {
 DQ=1;
 DQ=0;
 dat>>=1;
 DQ=1;
 if(DQ)
 dat|=0x80;
 DQ=1;
 delay(25);
 }
 return dat;
}

void Witie_Ds18b20(uchar dat)
{
uchar i=0;
for(i=0;i<8;i++)
{
 DQ=1;
 dat>>=1;
 DQ=0;
 DQ=CY;
 delay(25);
 DQ=1;
}
}

void chuli()
{
 uint temp;
float tem;
Init_Ds18b20(); //復(fù)位
Witie_Ds18b20(0xcc); //寫跳過ROM命令
Witie_Ds18b20(0x44); //開啟溫度轉(zhuǎn)換
Init_Ds18b20();
Witie_Ds18b20(0xcc);
Witie_Ds18b20(0xbe); //讀暫存器
TMPL = Read_Ds18b20();
TMPH = Read_Ds18b20();

temp = TMPH;
temp <<= 8;
temp = temp | TMPL;
if(TMPH>=8)
{
 temp=~temp+1;
 FLAG=1;
}
else FLAG=0;
tem=temp*0.0625;
temp=tem*100;

if((temp/10000)==0) //當(dāng)高位為0時不顯示0
 L1602_char(2,5,' ');
else
 L1602_char(2,5,temp/10000 + 48);
if((temp/10000)==0&&(temp/1000%10)==0) //當(dāng)高位為0時不顯示0
 L1602_char(2,6,' ');
else
 L1602_char(2,6,temp/1000%10 + 48);
 L1602_char(2,7,temp/100%10 + 48);

 L1602_char(2,8,0x2e);
L1602_char(2,9,temp/10%10 + 48);
L1602_char(2,10,temp%10 + 48);
L1602_char(2,11,0xdf); //溫度符號C前的圈
if(FLAG==1)
 L1602_char(2,4,0x2d); //輸出-號
else
 L1602_char(2,4,0x2b); //輸出+號
}
void main()
{
// float tt;
// uint temp;
P2 = 0x00;
L1602_init();
L1602_string(1,1," DS18B20 TEST ");
L1602_string(2,1," C");
while(1)
{
chuli();
}
}

作者: 養(yǎng). 時間: 2021-12-9 17:57
代碼運(yùn)行了不隨溫度改變呀一直是0.06

歡迎光臨 (http://www.zg4o1577.cn/bbs/)