神马作文网DS18B20能直接测出环境温度吗?它的输出信号需要先经过AD转换后再送入单片机么?
来源：学生作业帮 编辑：神马作文网作业帮 分类：综合作业 时间：2024/11/06 19:28:50
DS18B20能直接测出环境温度吗?它的输出信号需要先经过AD转换后再送入单片机么?
因为我测人体温度（用的红外）要先知道环境温度
因为我测人体温度（用的红外）要先知道环境温度
不用经过AD,单片机只需通过一个I/O口就可以把DS18B20的数据读出来,主要是要编程.
把程序写给你吧.程序里面的数组数据是我自己接的数码管显示数字数据,你应用时注意改就好.DS与单片机的接口也能自己决定,不必和我一样.
//安装目录下的EXE文件打开后可在电脑上显示当前温度值
#include
#define uchar unsigned char
#define uint unsigned int
sbit DS=P1^0; //define interface
uint temp; // variable of temperature
uchar flag1; // sign of the result positive or negative
//sbit dula=P2^6;
//sbit wela=P2^7;
//unsigned char code table2[]={0x3f,0x30,0x5b,0x4f,0x66,0x6d,0x7d,
// 0x07,0x7f,0x67/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xbf,0xb0,0xdb,0xcf,0xe6,0xed,0xfd,
// 0x87,0xff,0xe7};
//unsigned char code table2[]={0x40,0x5e,0x24,0x21,0x13,0x09,0x08,
// 0x63,0x00,0x03/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xc0,0xde,0xa4,0xa1,0x93,0x89,0x88,
// 0xe7,0x8f,0x87};
unsigned char code table5[]={0x77,0x22,0x6d,0x5d,0x1e,0x5b,0x7b,
0x15,0x7f,0x1f};
unsigned char code table6[]={0xf7,0xa2,0xed,0xdd,0x9e,0xdb,0xfb,
0x95,0xff,0x9f};
void delay(uint count) //delay
{
uint i;
while(count)
{
i=200;
while(i>0)
i--;
count--;
}
}
///////功能:串口初始化,波特率9600,方式1///////
void Init_Com(void)
{
TMOD = 0x20;
PCON = 0x00;
SCON = 0x50;
TH1 = 0xFd;
TL1 = 0xFd;
TR1 = 1;
}
void dsreset(void) //send reset and initialization command 18B20复位,初始化函数
{
uint i;
DS=0;
i=103;
while(i>0)i--;
DS=1;
i=4;
while(i>0)i--;
}
bit tmpreadbit(void) //read a bit 读1位数据函数
{
uint i;
bit dat;
DS=0;i++; //i++ for delay
DS=1;i++;i++;
dat=DS;
i=8;while(i>0)i--;
return (dat);
}
uchar tmpread(void) //read a byte date 读1字节函数
{
uchar i,j,dat;
dat=0;
for(i=1;i1;
if(testb) //write 1
{
DS=0;
i++;i++;
DS=1;
i=8;while(i>0)i--;
}
else
{
DS=0; //write 0
i=8;while(i>0)i--;
DS=1;
i++;i++;
}
}
}
void tmpchange(void) //DS18B20 begin change 开始获取数据并转换
{
dsreset();
delay(1);
tmpwritebyte(0xcc); // address all drivers on bus 写跳过读ROM指令
tmpwritebyte(0x44); // initiates a single temperature conversion 写温度转换指令
}
uint tmp() //get the temperature 读取寄存器中存储的温度数据
{
float tt;
uchar a,b;
dsreset();
delay(1);
tmpwritebyte(0xcc);
tmpwritebyte(0xbe);
a=tmpread(); //读低8位
b=tmpread(); //读高8位
temp=b;
temp0;b--);
}
void display(uint temp)//显示程序
{
uchar A1,A2,A2t,A3,ser;
ser=temp/10;
SBUF=ser;
A1=temp/100;
A2t=temp%100;
A2=A2t/10;
A3=A2t%10;
//dula=0;
d4=0;
P0=table5[A1];
delay(1);
d4=1;//显示百位
//dula=1;
// dula=0;
/*wela=0;
P0=0x7e;
wela=1;
wela=0;*/
//dula=0;
d3=0;
P0=table6[A2];
delay(1);
d3=1;//显示十位
//dula=1;
//dula=0;
/*wela=0;
P0=0x7d;
wela=1;
wela=0; */
d2=0;
P0=table5[A3];
delay(1);
d2=1;//显示个位
//dula=1;
//dula=0;
/*P0=0x7b;
wela=1;
wela=0; */
}
void main()
{
uchar a;
Init_Com();
do
{
tmpchange();
// delay(200);
for(a=1;a>0;a--)
{ display(tmp());
}
} while(1);
}
//安装目录下的EXE文件打开后可在电脑上显示当前温度值
#include
#define uchar unsigned char
#define uint unsigned int
sbit DS=P1^0; //define interface
uint temp; // variable of temperature
uchar flag1; // sign of the result positive or negative
//sbit dula=P2^6;
//sbit wela=P2^7;
//unsigned char code table2[]={0x3f,0x30,0x5b,0x4f,0x66,0x6d,0x7d,
// 0x07,0x7f,0x67/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xbf,0xb0,0xdb,0xcf,0xe6,0xed,0xfd,
// 0x87,0xff,0xe7};
//unsigned char code table2[]={0x40,0x5e,0x24,0x21,0x13,0x09,0x08,
// 0x63,0x00,0x03/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xc0,0xde,0xa4,0xa1,0x93,0x89,0x88,
// 0xe7,0x8f,0x87};
unsigned char code table5[]={0x77,0x22,0x6d,0x5d,0x1e,0x5b,0x7b,
0x15,0x7f,0x1f};
unsigned char code table6[]={0xf7,0xa2,0xed,0xdd,0x9e,0xdb,0xfb,
0x95,0xff,0x9f};
void delay(uint count) //delay
{
uint i;
while(count)
{
i=200;
while(i>0)
i--;
count--;
}
}
///////功能:串口初始化,波特率9600,方式1///////
void Init_Com(void)
{
TMOD = 0x20;
PCON = 0x00;
SCON = 0x50;
TH1 = 0xFd;
TL1 = 0xFd;
TR1 = 1;
}
void dsreset(void) //send reset and initialization command 18B20复位,初始化函数
{
uint i;
DS=0;
i=103;
while(i>0)i--;
DS=1;
i=4;
while(i>0)i--;
}
bit tmpreadbit(void) //read a bit 读1位数据函数
{
uint i;
bit dat;
DS=0;i++; //i++ for delay
DS=1;i++;i++;
dat=DS;
i=8;while(i>0)i--;
return (dat);
}
uchar tmpread(void) //read a byte date 读1字节函数
{
uchar i,j,dat;
dat=0;
for(i=1;i1;
if(testb) //write 1
{
DS=0;
i++;i++;
DS=1;
i=8;while(i>0)i--;
}
else
{
DS=0; //write 0
i=8;while(i>0)i--;
DS=1;
i++;i++;
}
}
}
void tmpchange(void) //DS18B20 begin change 开始获取数据并转换
{
dsreset();
delay(1);
tmpwritebyte(0xcc); // address all drivers on bus 写跳过读ROM指令
tmpwritebyte(0x44); // initiates a single temperature conversion 写温度转换指令
}
uint tmp() //get the temperature 读取寄存器中存储的温度数据
{
float tt;
uchar a,b;
dsreset();
delay(1);
tmpwritebyte(0xcc);
tmpwritebyte(0xbe);
a=tmpread(); //读低8位
b=tmpread(); //读高8位
temp=b;
temp0;b--);
}
void display(uint temp)//显示程序
{
uchar A1,A2,A2t,A3,ser;
ser=temp/10;
SBUF=ser;
A1=temp/100;
A2t=temp%100;
A2=A2t/10;
A3=A2t%10;
//dula=0;
d4=0;
P0=table5[A1];
delay(1);
d4=1;//显示百位
//dula=1;
// dula=0;
/*wela=0;
P0=0x7e;
wela=1;
wela=0;*/
//dula=0;
d3=0;
P0=table6[A2];
delay(1);
d3=1;//显示十位
//dula=1;
//dula=0;
/*wela=0;
P0=0x7d;
wela=1;
wela=0; */
d2=0;
P0=table5[A3];
delay(1);
d2=1;//显示个位
//dula=1;
//dula=0;
/*P0=0x7b;
wela=1;
wela=0; */
}
void main()
{
uchar a;
Init_Com();
do
{
tmpchange();
// delay(200);
for(a=1;a>0;a--)
{ display(tmp());
}
} while(1);
}
再问： 非非常感谢你的程序，如果用LCD1602显示的话该怎么改啊。。
再答： 下面的程序是简单地显示数字和字母的LCD显示程序。你在主函数那里改下你需要显示的东西就行了。最近有些忙，就没时间帮你详细到每个步骤了。剩下的你就自己弄吧。 #include #define uchar unsigned char #define uint unsigned int sbit rs=P3^5; sbit lcden=P3^4; sbit dula=P2^6; sbit wela=P2^7; sbit rw=P3^6; uchar table1[]="CC-DZ MCU"; uchar table2[]="1234567654321"; void delay(uint x) { uint a,b; for(a=x;a>0;a--) for(b=10;b>0;b--); } void delay1(uint x) { uint a,b; for(a=x;a>0;a--) for(b=100;b>0;b--); } void write_com(uchar com) { P0=com; rs=0; rw = 0; lcden=0; delay(10); lcden=1; delay(10); lcden=0; } void write_date(uchar date) { P0=date; rs=1; rw = 0; lcden=0; delay(10); lcden=1; delay(10); lcden=0; } void init() { rw=0; dula=0; wela=0; write_com(0x38); delay(20); write_com(0x0f); delay(20); write_com(0x06); delay(20); write_com(0x01); delay(20); } void main() { uchar a; init(); write_com(0x80+17); delay(20); for(a=0;a
把程序写给你吧.程序里面的数组数据是我自己接的数码管显示数字数据,你应用时注意改就好.DS与单片机的接口也能自己决定,不必和我一样.
//安装目录下的EXE文件打开后可在电脑上显示当前温度值
#include
#define uchar unsigned char
#define uint unsigned int
sbit DS=P1^0; //define interface
uint temp; // variable of temperature
uchar flag1; // sign of the result positive or negative
//sbit dula=P2^6;
//sbit wela=P2^7;
//unsigned char code table2[]={0x3f,0x30,0x5b,0x4f,0x66,0x6d,0x7d,
// 0x07,0x7f,0x67/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xbf,0xb0,0xdb,0xcf,0xe6,0xed,0xfd,
// 0x87,0xff,0xe7};
//unsigned char code table2[]={0x40,0x5e,0x24,0x21,0x13,0x09,0x08,
// 0x63,0x00,0x03/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xc0,0xde,0xa4,0xa1,0x93,0x89,0x88,
// 0xe7,0x8f,0x87};
unsigned char code table5[]={0x77,0x22,0x6d,0x5d,0x1e,0x5b,0x7b,
0x15,0x7f,0x1f};
unsigned char code table6[]={0xf7,0xa2,0xed,0xdd,0x9e,0xdb,0xfb,
0x95,0xff,0x9f};
void delay(uint count) //delay
{
uint i;
while(count)
{
i=200;
while(i>0)
i--;
count--;
}
}
///////功能:串口初始化,波特率9600,方式1///////
void Init_Com(void)
{
TMOD = 0x20;
PCON = 0x00;
SCON = 0x50;
TH1 = 0xFd;
TL1 = 0xFd;
TR1 = 1;
}
void dsreset(void) //send reset and initialization command 18B20复位,初始化函数
{
uint i;
DS=0;
i=103;
while(i>0)i--;
DS=1;
i=4;
while(i>0)i--;
}
bit tmpreadbit(void) //read a bit 读1位数据函数
{
uint i;
bit dat;
DS=0;i++; //i++ for delay
DS=1;i++;i++;
dat=DS;
i=8;while(i>0)i--;
return (dat);
}
uchar tmpread(void) //read a byte date 读1字节函数
{
uchar i,j,dat;
dat=0;
for(i=1;i1;
if(testb) //write 1
{
DS=0;
i++;i++;
DS=1;
i=8;while(i>0)i--;
}
else
{
DS=0; //write 0
i=8;while(i>0)i--;
DS=1;
i++;i++;
}
}
}
void tmpchange(void) //DS18B20 begin change 开始获取数据并转换
{
dsreset();
delay(1);
tmpwritebyte(0xcc); // address all drivers on bus 写跳过读ROM指令
tmpwritebyte(0x44); // initiates a single temperature conversion 写温度转换指令
}
uint tmp() //get the temperature 读取寄存器中存储的温度数据
{
float tt;
uchar a,b;
dsreset();
delay(1);
tmpwritebyte(0xcc);
tmpwritebyte(0xbe);
a=tmpread(); //读低8位
b=tmpread(); //读高8位
temp=b;
temp0;b--);
}
void display(uint temp)//显示程序
{
uchar A1,A2,A2t,A3,ser;
ser=temp/10;
SBUF=ser;
A1=temp/100;
A2t=temp%100;
A2=A2t/10;
A3=A2t%10;
//dula=0;
d4=0;
P0=table5[A1];
delay(1);
d4=1;//显示百位
//dula=1;
// dula=0;
/*wela=0;
P0=0x7e;
wela=1;
wela=0;*/
//dula=0;
d3=0;
P0=table6[A2];
delay(1);
d3=1;//显示十位
//dula=1;
//dula=0;
/*wela=0;
P0=0x7d;
wela=1;
wela=0; */
d2=0;
P0=table5[A3];
delay(1);
d2=1;//显示个位
//dula=1;
//dula=0;
/*P0=0x7b;
wela=1;
wela=0; */
}
void main()
{
uchar a;
Init_Com();
do
{
tmpchange();
// delay(200);
for(a=1;a>0;a--)
{ display(tmp());
}
} while(1);
}
//安装目录下的EXE文件打开后可在电脑上显示当前温度值
#include
#define uchar unsigned char
#define uint unsigned int
sbit DS=P1^0; //define interface
uint temp; // variable of temperature
uchar flag1; // sign of the result positive or negative
//sbit dula=P2^6;
//sbit wela=P2^7;
//unsigned char code table2[]={0x3f,0x30,0x5b,0x4f,0x66,0x6d,0x7d,
// 0x07,0x7f,0x67/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xbf,0xb0,0xdb,0xcf,0xe6,0xed,0xfd,
// 0x87,0xff,0xe7};
//unsigned char code table2[]={0x40,0x5e,0x24,0x21,0x13,0x09,0x08,
// 0x63,0x00,0x03/*,0x77,0x7c,0x39,0x5e,0x79,0x71*/};
//unsigned char code table1[]={0xc0,0xde,0xa4,0xa1,0x93,0x89,0x88,
// 0xe7,0x8f,0x87};
unsigned char code table5[]={0x77,0x22,0x6d,0x5d,0x1e,0x5b,0x7b,
0x15,0x7f,0x1f};
unsigned char code table6[]={0xf7,0xa2,0xed,0xdd,0x9e,0xdb,0xfb,
0x95,0xff,0x9f};
void delay(uint count) //delay
{
uint i;
while(count)
{
i=200;
while(i>0)
i--;
count--;
}
}
///////功能:串口初始化,波特率9600,方式1///////
void Init_Com(void)
{
TMOD = 0x20;
PCON = 0x00;
SCON = 0x50;
TH1 = 0xFd;
TL1 = 0xFd;
TR1 = 1;
}
void dsreset(void) //send reset and initialization command 18B20复位,初始化函数
{
uint i;
DS=0;
i=103;
while(i>0)i--;
DS=1;
i=4;
while(i>0)i--;
}
bit tmpreadbit(void) //read a bit 读1位数据函数
{
uint i;
bit dat;
DS=0;i++; //i++ for delay
DS=1;i++;i++;
dat=DS;
i=8;while(i>0)i--;
return (dat);
}
uchar tmpread(void) //read a byte date 读1字节函数
{
uchar i,j,dat;
dat=0;
for(i=1;i1;
if(testb) //write 1
{
DS=0;
i++;i++;
DS=1;
i=8;while(i>0)i--;
}
else
{
DS=0; //write 0
i=8;while(i>0)i--;
DS=1;
i++;i++;
}
}
}
void tmpchange(void) //DS18B20 begin change 开始获取数据并转换
{
dsreset();
delay(1);
tmpwritebyte(0xcc); // address all drivers on bus 写跳过读ROM指令
tmpwritebyte(0x44); // initiates a single temperature conversion 写温度转换指令
}
uint tmp() //get the temperature 读取寄存器中存储的温度数据
{
float tt;
uchar a,b;
dsreset();
delay(1);
tmpwritebyte(0xcc);
tmpwritebyte(0xbe);
a=tmpread(); //读低8位
b=tmpread(); //读高8位
temp=b;
temp0;b--);
}
void display(uint temp)//显示程序
{
uchar A1,A2,A2t,A3,ser;
ser=temp/10;
SBUF=ser;
A1=temp/100;
A2t=temp%100;
A2=A2t/10;
A3=A2t%10;
//dula=0;
d4=0;
P0=table5[A1];
delay(1);
d4=1;//显示百位
//dula=1;
// dula=0;
/*wela=0;
P0=0x7e;
wela=1;
wela=0;*/
//dula=0;
d3=0;
P0=table6[A2];
delay(1);
d3=1;//显示十位
//dula=1;
//dula=0;
/*wela=0;
P0=0x7d;
wela=1;
wela=0; */
d2=0;
P0=table5[A3];
delay(1);
d2=1;//显示个位
//dula=1;
//dula=0;
/*P0=0x7b;
wela=1;
wela=0; */
}
void main()
{
uchar a;
Init_Com();
do
{
tmpchange();
// delay(200);
for(a=1;a>0;a--)
{ display(tmp());
}
} while(1);
}
再问： 非非常感谢你的程序，如果用LCD1602显示的话该怎么改啊。。
再答： 下面的程序是简单地显示数字和字母的LCD显示程序。你在主函数那里改下你需要显示的东西就行了。最近有些忙，就没时间帮你详细到每个步骤了。剩下的你就自己弄吧。 #include #define uchar unsigned char #define uint unsigned int sbit rs=P3^5; sbit lcden=P3^4; sbit dula=P2^6; sbit wela=P2^7; sbit rw=P3^6; uchar table1[]="CC-DZ MCU"; uchar table2[]="1234567654321"; void delay(uint x) { uint a,b; for(a=x;a>0;a--) for(b=10;b>0;b--); } void delay1(uint x) { uint a,b; for(a=x;a>0;a--) for(b=100;b>0;b--); } void write_com(uchar com) { P0=com; rs=0; rw = 0; lcden=0; delay(10); lcden=1; delay(10); lcden=0; } void write_date(uchar date) { P0=date; rs=1; rw = 0; lcden=0; delay(10); lcden=1; delay(10); lcden=0; } void init() { rw=0; dula=0; wela=0; write_com(0x38); delay(20); write_com(0x0f); delay(20); write_com(0x06); delay(20); write_com(0x01); delay(20); } void main() { uchar a; init(); write_com(0x80+17); delay(20); for(a=0;a
DS18B20能直接测出环境温度吗?它的输出信号需要先经过AD转换后再送入单片机么?
谁能告诉我单片机从ds18b20中读取温度的原理,是怎样将ds18b20中输出的一位信号变为多位的.
PIC单片机ds18b20测温度时,将AD转换的750ms延时使用中断延时的程序后,温度检测的变化几分才转换一次,为
DS18B20采集温度数据时需要AD转换吗?
通过C/V转换电路后的信号先经过一个0欧姆的电阻后送入A/D转换电路,请问0欧姆的电阻具体什么作用?
一般单片机信号采集作AD转换的话,采集的是什么信号?电流还是电压?为什么?还有为什么需要放大?
DS18b20中的温度值单片机可以直接用来运算吗?
将收到的模拟化电子信号先还原成数字化的电子信号后再送入计算机中,这个过程称为 ( ) .
想请问一下,330k的电阻和150k电阻在这个比较电路中有什么作用,输出的信号可以直接接到单片机吗
AD采样电路?单片机3.3V ADC采样口,能采样电源为5V的模拟信号吗?
麦克风将声音信号转换为电信号后,然后经过扬声器再转换为声音信号,这个扬声器就在麦克风里吗,还是经过
英语翻译UB-B系列变送器能直接将磁浮子液位计测量的液位值转换成标准的4~20mADC信号输出,远传给计算机、PLC,D