BMP180气压传感器与STC89c51单片机

单片机

`BMP180气压传感器与STC89c51单片机如何连接？需要什么样的外围电路？
`

dusten · 2015-4-17 17:06:38

首先我想说这个东西是3.3v供电的，STC89c51好像电压太高了

吕海鹏 · 2015-4-19 12:22:11

嗯，首先非常感谢你能给出宝贵建议，这个东西我前两天已经做出来了

ryl小日喵 · 2015-4-27 17:21:28

楼主能分享一下代码吗？万分感谢

吕海鹏 · 2015-5-29 12:32:34

ryl小日喵发表于 2015-4-27 17:21
楼主能分享一下代码吗？万分感谢

#include
#include    //Keil library
#include    //Keil library
#include    //Keil library
#include   //Keil library
#define uchar unsigned char
#define uint unsigned int
#define DataPort P0 //LCD1602数据端口
***it    SCL=P1^0;    //IIC时钟引脚定义
***it    SDA=P1^1;    //IIC数据引脚定义
***it    rs=P2^2; //LCD1602命令端口
***it    rw=P2^1; //LCD1602命令端口
***it    ep=P2^0; //LCD1602命令端口
uchar code table3[]="℃";
uchar code table1[]="温度";
  uchar code table0[]="气压";
  uint i,j,k;
#define BMP085_SlaveAddress 0xee    //定义器件在IIC总线中的从地址

#define OSS 0 // Oversampling Setting (note: code is not set up to use other OSS values)

typedef unsigned char  BYTE;
typedef unsigned short WORD;

uchar ge,shi,bai,qian,wan,shiwan;          //显示变量
int  dis_data;                            //变量

short ac1;
short ac2;
short ac3;
unsigned short ac4;
unsigned short ac5;
unsigned short ac6;
short b1;
short b2;
short mb;
short mc;
short md;

void delay(unsigned int k);
//void InitLcd();                         //初始化lcd1602

void WriteDataLCM(uchar dataW);
void WriteCommandLCM(uchar CMD,uchar Attribc);
void DisplayOneChar(uchar X,uchar Y,uchar DData);
void conversion(long temp_data);

void  Single_Write(uchar SlaveAddress,uchar REG_Address,uchar REG_data); //单个写入数据
uchar Single_Read(uchar REG_Address);                                     //单个读取内部寄存器数据
void  Multiple_Read(uchar,uchar);                                        //连续的读取内部寄存器数据
//------------------------------------
void Delay5us();
void Delay5ms();
void BMP085_Start();
void BMP085_Stop();
void BMP085_SendACK(bit ack);
bit  BMP085_RecvACK();
void BMP085_SendByte(BYTE dat);
BYTE BMP085_RecvByte();
void BMP085_ReadPage();
void BMP085_WritePage();
//-----------------------------------

//*********************************************************
void conversion(long temp_data)
{

shiwan=temp_data/100000+0x30 ;
temp_data=temp_data%100000; //取余运算
wan=temp_data/10000+0x30 ;
temp_data=temp_data%10000; //取余运算
qian=temp_data/1000+0x30 ;
temp_data=temp_data%1000; //取余运算
bai=temp_data/100+0x30 ;
temp_data=temp_data%100;    //取余运算
shi=temp_data/10+0x30 ;
temp_data=temp_data%10;    //取余运算
ge=temp_data+0x30;
}

/*******************************/
void delay(unsigned int k)
{
unsigned int i,j;
for(i=0;i {
for(j=0;j<121;j++)
{;}}
}
/*******************************/
/*void WaitForEnable(void)
{
DataPort=0xff;
LCM_RS=0;LCM_RW=1;_nop_();
LCM_EN=1;_nop_();_nop_();
while(DataPort&0x80);
LCM_EN=0;
}*/
/*******************************/
void write_cmd(uchar CMD)// 写指令
{
//while(lcd_bz()) ;
rs = 0 ;
rw = 0 ;
ep = 0 ;
P0 = CMD ;
delay(1);
ep = 1 ;
delay(1);
ep = 0 ;
}
/*void WriteCommandLCM(uchar CMD,uchar Attribc)
{
if(Attribc)WaitForEnable();
LCM_RS=0;LCM_RW=0;_nop_();
DataPort=CMD;_nop_();
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
} */
/*******************************/
void write_byte(uchar dataW)//写字节
{
// while(lcd_bz()) ;
rs = 1 ;
rw = 0 ;
ep = 0 ;
P0 = dataW ;
delay(1);
ep = 1 ;
delay(1);
ep = 0 ;
}
/*void WriteDataLCM(uchar dataW)
{
WaitForEnable();
LCM_RS=1;LCM_RW=0;_nop_();
DataPort=dataW;_nop_();
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
} */
/***********************************/
void lcd_init()// 初始化
{
//write_cmd(0x38) ;
write_cmd(0x30);
  delay(5);
// write_cmd(0x08) ;
write_cmd(0x0c) ;
  delay(5);
//  write_cmd(0x01) ;
//  delay(5);
  write_cmd(0x06) ;
  delay(5);
//write_cmd(0x0c) ;
//write_cmd(0x80) ;
//delay(1);
}
/*void InitLcd()
{
WriteCommandLCM(0x38,1);
WriteCommandLCM(0x08,1);
WriteCommandLCM(0x01,1);
WriteCommandLCM(0x06,1);
WriteCommandLCM(0x0c,1);
}*/
/***********************************/
/*void DisplayOneChar(uchar X,uchar Y,uchar DData)
{
Y&=1;
X&=15;
if(Y)X|=0x40;
X|=0x80;
WriteCommandLCM(X,0);
WriteDataLCM(DData);
}*/

/**************************************
延时5微秒(STC90C52RC@12M)
不同的工作环境,需要调整此函数，注意时钟过快时需要修改
当改用1T的MCU时,请调整此延时函数
**************************************/
void Delay5us()
{
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
}

/**************************************
延时5毫秒(STC90C52RC@12M)
不同的工作环境,需要调整此函数
当改用1T的MCU时,请调整此延时函数
**************************************/
void Delay5ms()
{
WORD n = 560;

while (n--);
}

/**************************************
起始信号
**************************************/
void BMP085_Start()
{
SDA = 1;                   //拉高数据线
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
SDA = 0;                   //产生下降沿
Delay5us();                //延时
SCL = 0;                   //拉低时钟线
}

/**************************************
停止信号
**************************************/
void BMP085_Stop()
{
SDA = 0;                   //拉低数据线
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
SDA = 1;                   //产生上升沿
Delay5us();                //延时
}

/**************************************
发送应答信号
入口参数:ack (0:ACK 1:NAK)
**************************************/
void BMP085_SendACK(bit ack)
{
SDA = ack;                //写应答信号
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
SCL = 0;                   //拉低时钟线
Delay5us();                //延时
}

/**************************************
接收应答信号
**************************************/
bit BMP085_RecvACK()
{
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
CY = SDA;                //读应答信号
SCL = 0;                   //拉低时钟线
Delay5us();                //延时

return CY;
}

/**************************************
向IIC总线发送一个字节数据
**************************************/
void BMP085_SendByte(BYTE dat)
{
BYTE i;

for (i=0; i<8; i++)       //8位计数器
{
      dat <<= 1;             //移出数据的最高位
      SDA = CY;             //送数据口
      SCL = 1;             //拉高时钟线
      Delay5us();          //延时
      SCL = 0;             //拉低时钟线
      Delay5us();          //延时
}
BMP085_RecvACK();
}

/**************************************
从IIC总线接收一个字节数据
**************************************/
BYTE BMP085_RecvByte()
{
BYTE i;
BYTE dat = 0;

SDA = 1;                   //使能内部上拉,准备读取数据,
for (i=0; i<8; i++)       //8位计数器
{
      dat <<= 1;
      SCL = 1;             //拉高时钟线
      Delay5us();          //延时
      dat |= SDA;          //读数据
      SCL = 0;             //拉低时钟线
      Delay5us();          //延时
}
return dat;
}
/*
//单字节写入BMP085内部数据*******************************

void Single_Write(uchar SlaveAddress,uchar REG_Address,uchar REG_data)
{
BMP085_Start();                //起始信号
BMP085_SendByte(SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(REG_Address); //内部寄存器地址
BMP085_SendByte(REG_data);    //内部寄存器数据
BMP085_Stop();                //发送停止信号
}
*/
/*
//单字节读取BMP085内部数据********************************
uchar Single_Read(uchar REG_Address)
{  uchar REG_data;
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress);          //发送设备地址+写信号
BMP085_SendByte(REG_Address);          //发送存储单元地址
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress+1);       //发送设备地址+读信号
REG_data=BMP085_RecvByte();             //读出寄存器数据
BMP085_SendACK(1);
BMP085_Stop();                         //停止信号
return REG_data;
}
*/
//*********************************************************
//读出BMP085内部数据,连续两个
//*********************************************************
short Multiple_read(uchar ST_Address)
{
uchar m***, l***;
short _data;
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(ST_Address);          //发送存储单元地址
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress+1);       //发送设备地址+读信号

m*** = BMP085_RecvByte();                //BUF[0]存储
BMP085_SendACK(0);                      //回应ACK
l*** = BMP085_RecvByte();
BMP085_SendACK(1);                      //最后一个数据需要回NOACK

BMP085_Stop();                         //停止信号
Delay5ms();
_data = m*** << 8;
_data |= l***;
return _data;
}
//********************************************************************
long bmp085ReadTemp(void)
{

BMP085_Start();                //起始信号
BMP085_SendByte(BMP085_SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(0xF4);             // write register address
BMP085_SendByte(0x2E);    // write register data for temp
BMP085_Stop();                //发送停止信号
delay(10); // max time is 4.5ms

return (long) Multiple_read(0xF6);
}
//*************************************************************
long bmp085ReadPressure(void)
{
long pressure = 0;

BMP085_Start();                //起始信号
BMP085_SendByte(BMP085_SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(0xF4);             // write register address
BMP085_SendByte(0x34);       // write register data for pressure
BMP085_Stop();                   //发送停止信号
delay(10);                   // max time is 4.5ms

pressure = Multiple_read(0xF6);
pressure &= 0x0000FFFF;

return pressure;
//return (long) bmp085ReadShort(0xF6);
}

//**************************************************************

//初始化BMP085，根据需要请参考pdf进行修改**************
void Init_BMP085()
{
ac1 = Multiple_read(0xAA);
ac2 = Multiple_read(0xAC);
ac3 = Multiple_read(0xAE);
ac4 = Multiple_read(0xB0);
ac5 = Multiple_read(0xB2);
ac6 = Multiple_read(0xB4);
b1 =  Multiple_read(0xB6);
b2 =  Multiple_read(0xB8);
mb =  Multiple_read(0xBA);
mc =  Multiple_read(0xBC);
md =  Multiple_read(0xBE);
}
//***********************************************************************
void bmp085Convert()
{
long ut;
long up;
long x1, x2, b5, b6, x3, b3, p;
unsigned long b4, b7;
long  temperature;
long  pressure;

ut = bmp085ReadTemp();
ut = bmp085ReadTemp();    // 读取温度
up = bmp085ReadPressure();
up = bmp085ReadPressure();  // 读取压强

x1 = ((long)ut - ac6) * ac5 >> 15;
x2 = ((long) mc << 11) / (x1 + md);
b5 = x1 + x2;
   temperature = (b5 + 8) >> 4;

   //*************

   conversion(temperature);
write_cmd(0x80);
  // for(j=0;table2[j]!='';j++)
  // {
  // write_byte(table2[j]);
  // delay(5);
  // }
for(j=0;table1[j]!='';j++)
   {
   write_byte(table1[j]);
   delay(5);
   }
write_byte(':');
write_byte(bai);
write_byte(shi);
write_byte('.');
write_byte(ge);
write_byte(' ');
for(k=0;table3[k]!='';k++)
   {
   write_byte(table3[k]);
   delay(5);
   }
//write_byte(0XDF);
//write_byte('C');
/* DisplayOneChar(4,0,'T');    //温度显示
   DisplayOneChar(5,0,':');
   DisplayOneChar(7,0,);
   DisplayOneChar(8,0,);
   DisplayOneChar(9,0,'.');
   DisplayOneChar(10,0,);
   DisplayOneChar(11,0,);    //温度单位
   DisplayOneChar(12,0,); */


   //*************

b6 = b5 - 4000;
x1 = (b2 * (b6 * b6 >> 12)) >> 11;
x2 = ac2 * b6 >> 11;
x3 = x1 + x2;
b3 = (((long)ac1 * 4 + x3) + 2)/4;
x1 = ac3 * b6 >> 13;
x2 = (b1 * (b6 * b6 >> 12)) >> 16;
x3 = ((x1 + x2) + 2) >> 2;
b4 = (ac4 * (unsigned long) (x3 + 32768)) >> 15;
b7 = ((unsigned long) up - b3) * (50000 >> OSS);
if( b7 < 0x80000000)
      p = (b7 * 2) / b4 ;
         else
      p = (b7 / b4) * 2;
x1 = (p >> 8) * (p >> 8);
x1 = (x1 * 3038) >> 16;
x2 = (-7357 * p) >> 16;
   pressure = p + ((x1 + x2 + 3791) >> 4);

   conversion(pressure);
/* DisplayOneChar(4,1,'P'); //显示压强
   DisplayOneChar(5,1,);
   DisplayOneChar(6,1,shiwan);
   DisplayOneChar(7,1,);
   DisplayOneChar(8,1,);
   DisplayOneChar(9,1,);
   DisplayOneChar(10,1,);
   DisplayOneChar(11,1,);
   DisplayOneChar(12,1,); //气压单位
   DisplayOneChar(13,1,);
   DisplayOneChar(14,1,); */
write_cmd(0x90);
   for(i=0;table0!='';i++)
{
   write_byte(table0);
   delay(5);
   }
write_byte(':');
write_byte(shiwan);
write_byte(wan);
write_byte(qian);
write_byte('.');
write_byte(bai);
write_byte(shi);
write_byte('K');
write_byte('p');
write_byte('a');

}

//*********************************************************
//******主程序********
//*********************************************************
void main()
{
delay(50);                      //上电延时
  //  InitLcd();
lcd_init();                //液晶初始化
Init_BMP085();             //初始化BMP085
  while(1)                      //循环
  {
bmp085Convert();
delay(1000);
  }
}

吕海鹏 · 2015-5-29 12:33:06

ryl小日喵发表于 2015-4-27 17:21
楼主能分享一下代码吗？万分感谢

#include
#include    //Keil library
#include    //Keil library
#include    //Keil library
#include   //Keil library
#define uchar unsigned char
#define uint unsigned int
#define DataPort P0 //LCD1602数据端口
***it    SCL=P1^0;    //IIC时钟引脚定义
***it    SDA=P1^1;    //IIC数据引脚定义
***it    rs=P2^2; //LCD1602命令端口
***it    rw=P2^1; //LCD1602命令端口
***it    ep=P2^0; //LCD1602命令端口
uchar code table3[]="℃";
uchar code table1[]="温度";
  uchar code table0[]="气压";
  uint i,j,k;
#define BMP085_SlaveAddress 0xee    //定义器件在IIC总线中的从地址

#define OSS 0 // Oversampling Setting (note: code is not set up to use other OSS values)

typedef unsigned char  BYTE;
typedef unsigned short WORD;

uchar ge,shi,bai,qian,wan,shiwan;          //显示变量
int  dis_data;                            //变量

short ac1;
short ac2;
short ac3;
unsigned short ac4;
unsigned short ac5;
unsigned short ac6;
short b1;
short b2;
short mb;
short mc;
short md;

void delay(unsigned int k);
//void InitLcd();                         //初始化lcd1602

void WriteDataLCM(uchar dataW);
void WriteCommandLCM(uchar CMD,uchar Attribc);
void DisplayOneChar(uchar X,uchar Y,uchar DData);
void conversion(long temp_data);

void  Single_Write(uchar SlaveAddress,uchar REG_Address,uchar REG_data); //单个写入数据
uchar Single_Read(uchar REG_Address);                                     //单个读取内部寄存器数据
void  Multiple_Read(uchar,uchar);                                        //连续的读取内部寄存器数据
//------------------------------------
void Delay5us();
void Delay5ms();
void BMP085_Start();
void BMP085_Stop();
void BMP085_SendACK(bit ack);
bit  BMP085_RecvACK();
void BMP085_SendByte(BYTE dat);
BYTE BMP085_RecvByte();
void BMP085_ReadPage();
void BMP085_WritePage();
//-----------------------------------

//*********************************************************
void conversion(long temp_data)
{

shiwan=temp_data/100000+0x30 ;
temp_data=temp_data%100000; //取余运算
wan=temp_data/10000+0x30 ;
temp_data=temp_data%10000; //取余运算
qian=temp_data/1000+0x30 ;
temp_data=temp_data%1000; //取余运算
bai=temp_data/100+0x30 ;
temp_data=temp_data%100;    //取余运算
shi=temp_data/10+0x30 ;
temp_data=temp_data%10;    //取余运算
ge=temp_data+0x30;
}

/*******************************/
void delay(unsigned int k)
{
unsigned int i,j;
for(i=0;i {
for(j=0;j<121;j++)
{;}}
}
/*******************************/
/*void WaitForEnable(void)
{
DataPort=0xff;
LCM_RS=0;LCM_RW=1;_nop_();
LCM_EN=1;_nop_();_nop_();
while(DataPort&0x80);
LCM_EN=0;
}*/
/*******************************/
void write_cmd(uchar CMD)// 写指令
{
//while(lcd_bz()) ;
rs = 0 ;
rw = 0 ;
ep = 0 ;
P0 = CMD ;
delay(1);
ep = 1 ;
delay(1);
ep = 0 ;
}
/*void WriteCommandLCM(uchar CMD,uchar Attribc)
{
if(Attribc)WaitForEnable();
LCM_RS=0;LCM_RW=0;_nop_();
DataPort=CMD;_nop_();
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
} */
/*******************************/
void write_byte(uchar dataW)//写字节
{
// while(lcd_bz()) ;
rs = 1 ;
rw = 0 ;
ep = 0 ;
P0 = dataW ;
delay(1);
ep = 1 ;
delay(1);
ep = 0 ;
}
/*void WriteDataLCM(uchar dataW)
{
WaitForEnable();
LCM_RS=1;LCM_RW=0;_nop_();
DataPort=dataW;_nop_();
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
} */
/***********************************/
void lcd_init()// 初始化
{
//write_cmd(0x38) ;
write_cmd(0x30);
  delay(5);
// write_cmd(0x08) ;
write_cmd(0x0c) ;
  delay(5);
//  write_cmd(0x01) ;
//  delay(5);
  write_cmd(0x06) ;
  delay(5);
//write_cmd(0x0c) ;
//write_cmd(0x80) ;
//delay(1);
}
/*void InitLcd()
{
WriteCommandLCM(0x38,1);
WriteCommandLCM(0x08,1);
WriteCommandLCM(0x01,1);
WriteCommandLCM(0x06,1);
WriteCommandLCM(0x0c,1);
}*/
/***********************************/
/*void DisplayOneChar(uchar X,uchar Y,uchar DData)
{
Y&=1;
X&=15;
if(Y)X|=0x40;
X|=0x80;
WriteCommandLCM(X,0);
WriteDataLCM(DData);
}*/

/**************************************
延时5微秒(STC90C52RC@12M)
不同的工作环境,需要调整此函数，注意时钟过快时需要修改
当改用1T的MCU时,请调整此延时函数
**************************************/
void Delay5us()
{
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
}

/**************************************
延时5毫秒(STC90C52RC@12M)
不同的工作环境,需要调整此函数
当改用1T的MCU时,请调整此延时函数
**************************************/
void Delay5ms()
{
WORD n = 560;

while (n--);
}

/**************************************
起始信号
**************************************/
void BMP085_Start()
{
SDA = 1;                   //拉高数据线
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
SDA = 0;                   //产生下降沿
Delay5us();                //延时
SCL = 0;                   //拉低时钟线
}

/**************************************
停止信号
**************************************/
void BMP085_Stop()
{
SDA = 0;                   //拉低数据线
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
SDA = 1;                   //产生上升沿
Delay5us();                //延时
}

/**************************************
发送应答信号
入口参数:ack (0:ACK 1:NAK)
**************************************/
void BMP085_SendACK(bit ack)
{
SDA = ack;                //写应答信号
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
SCL = 0;                   //拉低时钟线
Delay5us();                //延时
}

/**************************************
接收应答信号
**************************************/
bit BMP085_RecvACK()
{
SCL = 1;                   //拉高时钟线
Delay5us();                //延时
CY = SDA;                //读应答信号
SCL = 0;                   //拉低时钟线
Delay5us();                //延时

return CY;
}

/**************************************
向IIC总线发送一个字节数据
**************************************/
void BMP085_SendByte(BYTE dat)
{
BYTE i;

for (i=0; i<8; i++)       //8位计数器
{
      dat <<= 1;             //移出数据的最高位
      SDA = CY;             //送数据口
      SCL = 1;             //拉高时钟线
      Delay5us();          //延时
      SCL = 0;             //拉低时钟线
      Delay5us();          //延时
}
BMP085_RecvACK();
}

/**************************************
从IIC总线接收一个字节数据
**************************************/
BYTE BMP085_RecvByte()
{
BYTE i;
BYTE dat = 0;

SDA = 1;                   //使能内部上拉,准备读取数据,
for (i=0; i<8; i++)       //8位计数器
{
      dat <<= 1;
      SCL = 1;             //拉高时钟线
      Delay5us();          //延时
      dat |= SDA;          //读数据
      SCL = 0;             //拉低时钟线
      Delay5us();          //延时
}
return dat;
}
/*
//单字节写入BMP085内部数据*******************************

void Single_Write(uchar SlaveAddress,uchar REG_Address,uchar REG_data)
{
BMP085_Start();                //起始信号
BMP085_SendByte(SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(REG_Address); //内部寄存器地址
BMP085_SendByte(REG_data);    //内部寄存器数据
BMP085_Stop();                //发送停止信号
}
*/
/*
//单字节读取BMP085内部数据********************************
uchar Single_Read(uchar REG_Address)
{  uchar REG_data;
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress);          //发送设备地址+写信号
BMP085_SendByte(REG_Address);          //发送存储单元地址
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress+1);       //发送设备地址+读信号
REG_data=BMP085_RecvByte();             //读出寄存器数据
BMP085_SendACK(1);
BMP085_Stop();                         //停止信号
return REG_data;
}
*/
//*********************************************************
//读出BMP085内部数据,连续两个
//*********************************************************
short Multiple_read(uchar ST_Address)
{
uchar m***, l***;
short _data;
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(ST_Address);          //发送存储单元地址
BMP085_Start();                         //起始信号
BMP085_SendByte(BMP085_SlaveAddress+1);       //发送设备地址+读信号

m*** = BMP085_RecvByte();                //BUF[0]存储
BMP085_SendACK(0);                      //回应ACK
l*** = BMP085_RecvByte();
BMP085_SendACK(1);                      //最后一个数据需要回NOACK

BMP085_Stop();                         //停止信号
Delay5ms();
_data = m*** << 8;
_data |= l***;
return _data;
}
//********************************************************************
long bmp085ReadTemp(void)
{

BMP085_Start();                //起始信号
BMP085_SendByte(BMP085_SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(0xF4);             // write register address
BMP085_SendByte(0x2E);    // write register data for temp
BMP085_Stop();                //发送停止信号
delay(10); // max time is 4.5ms

return (long) Multiple_read(0xF6);
}
//*************************************************************
long bmp085ReadPressure(void)
{
long pressure = 0;

BMP085_Start();                //起始信号
BMP085_SendByte(BMP085_SlaveAddress); //发送设备地址+写信号
BMP085_SendByte(0xF4);             // write register address
BMP085_SendByte(0x34);       // write register data for pressure
BMP085_Stop();                   //发送停止信号
delay(10);                   // max time is 4.5ms

pressure = Multiple_read(0xF6);
pressure &= 0x0000FFFF;

return pressure;
//return (long) bmp085ReadShort(0xF6);
}

//**************************************************************

//初始化BMP085，根据需要请参考pdf进行修改**************
void Init_BMP085()
{
ac1 = Multiple_read(0xAA);
ac2 = Multiple_read(0xAC);
ac3 = Multiple_read(0xAE);
ac4 = Multiple_read(0xB0);
ac5 = Multiple_read(0xB2);
ac6 = Multiple_read(0xB4);
b1 =  Multiple_read(0xB6);
b2 =  Multiple_read(0xB8);
mb =  Multiple_read(0xBA);
mc =  Multiple_read(0xBC);
md =  Multiple_read(0xBE);
}
//***********************************************************************
void bmp085Convert()
{
long ut;
long up;
long x1, x2, b5, b6, x3, b3, p;
unsigned long b4, b7;
long  temperature;
long  pressure;

ut = bmp085ReadTemp();
ut = bmp085ReadTemp();    // 读取温度
up = bmp085ReadPressure();
up = bmp085ReadPressure();  // 读取压强

x1 = ((long)ut - ac6) * ac5 >> 15;
x2 = ((long) mc << 11) / (x1 + md);
b5 = x1 + x2;
   temperature = (b5 + 8) >> 4;

   //*************

   conversion(temperature);
write_cmd(0x80);
  // for(j=0;table2[j]!='';j++)
  // {
  // write_byte(table2[j]);
  // delay(5);
  // }
for(j=0;table1[j]!='';j++)
   {
   write_byte(table1[j]);
   delay(5);
   }
write_byte(':');
write_byte(bai);
write_byte(shi);
write_byte('.');
write_byte(ge);
write_byte(' ');
for(k=0;table3[k]!='';k++)
   {
   write_byte(table3[k]);
   delay(5);
   }
//write_byte(0XDF);
//write_byte('C');
/* DisplayOneChar(4,0,'T');    //温度显示
   DisplayOneChar(5,0,':');
   DisplayOneChar(7,0,);
   DisplayOneChar(8,0,);
   DisplayOneChar(9,0,'.');
   DisplayOneChar(10,0,);
   DisplayOneChar(11,0,);    //温度单位
   DisplayOneChar(12,0,); */


   //*************

b6 = b5 - 4000;
x1 = (b2 * (b6 * b6 >> 12)) >> 11;
x2 = ac2 * b6 >> 11;
x3 = x1 + x2;
b3 = (((long)ac1 * 4 + x3) + 2)/4;
x1 = ac3 * b6 >> 13;
x2 = (b1 * (b6 * b6 >> 12)) >> 16;
x3 = ((x1 + x2) + 2) >> 2;
b4 = (ac4 * (unsigned long) (x3 + 32768)) >> 15;
b7 = ((unsigned long) up - b3) * (50000 >> OSS);
if( b7 < 0x80000000)
      p = (b7 * 2) / b4 ;
         else
      p = (b7 / b4) * 2;
x1 = (p >> 8) * (p >> 8);
x1 = (x1 * 3038) >> 16;
x2 = (-7357 * p) >> 16;
   pressure = p + ((x1 + x2 + 3791) >> 4);

   conversion(pressure);
/* DisplayOneChar(4,1,'P'); //显示压强
   DisplayOneChar(5,1,);
   DisplayOneChar(6,1,shiwan);
   DisplayOneChar(7,1,);
   DisplayOneChar(8,1,);
   DisplayOneChar(9,1,);
   DisplayOneChar(10,1,);
   DisplayOneChar(11,1,);
   DisplayOneChar(12,1,); //气压单位
   DisplayOneChar(13,1,);
   DisplayOneChar(14,1,); */
write_cmd(0x90);
   for(i=0;table0!='';i++)
{
   write_byte(table0);
   delay(5);
   }
write_byte(':');
write_byte(shiwan);
write_byte(wan);
write_byte(qian);
write_byte('.');
write_byte(bai);
write_byte(shi);
write_byte('K');
write_byte('p');
write_byte('a');

}

//*********************************************************
//******主程序********
//*********************************************************
void main()
{
delay(50);                      //上电延时
  //  InitLcd();
lcd_init();                //液晶初始化
Init_BMP085();             //初始化BMP085
  while(1)                      //循环
  {
bmp085Convert();
delay(1000);
  }
}

136006gp2 · 2015-9-27 14:09:32

吕海鹏发表于 2015-5-29 12:33
#include
#include    //Keil library
#include //Keil library

程序有问题，为什么显示乱码

乖乖幸福1228 · 2015-10-21 11:37:02

楼主！怎么1602显示的都是小方块呢！

乖乖幸福1228 · 2015-10-21 11:38:56

楼主你怎么老是不在呢？我捣鼓一周多了！

yan418513001 · 2015-11-22 16:27:53

乖乖幸福1228 发表于 2015-10-21 11:38
楼主你怎么老是不在呢？我捣鼓一周多了！

你好，，你这个程序写的怎么样了，，最后实现了吗

AT89LE52 · 2016-1-7 11:19:09

这是我琢磨的BMP180的程序，串口输出测量值。检测出的温度始终不对，气压没问题。海拔高度的计算随便从网上扒了一个。大家一起交流，集思广益。

#include
#include
#include

#define uchar unsigned char
#define uint unsigned int

***it SDA=P1^0;
***it SCL=P1^1;

uchar code Comd0[]="temp:";
uint tempre[6];
#define OSS 1 // 过采样设置，（OSS可取0,1,2,3）

long temperature=0; //温度值
long pressure=0; //压力值
float height=0; //相对海拔高度值

short ac1;
short ac2;
short ac3;
short ac4;
short ac5;
short ac6;
short b1;
short b2;
short mb;
short mc;
short md;

void Some_Nop()
{
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
}

void Delay_ms(uchar i)
{
uint j;
for(;i>0;i--)
for(j=0;j<124;j++);
}
void Delay_s() //延时1s
{
uchar i;
for(i=0;i<20;i++)
{
TH0=0x4c;
TL0=0x00;
TR0=1;
while(TF0==0);TF0=0;
TR0=0;
}
}

/***************       I2C       *******************/
/*****************************************************/
void I2C_init()    //I2C初始化
{
SDA=1;
SCL=1;
}

void I2C_Start()    //I2C开始
{
SDA=1;
Some_Nop();
SCL=1;
Some_Nop();
SDA=0;
Some_Nop();
SCL=0;
_nop_();
}

void I2C_Stop()    //I2C结束
{
SDA=0;
Some_Nop();
SCL=1;
Some_Nop();
SDA=1;
Some_Nop();
}

void I2C_ACK(bit a)
{
if(a==1) SDA=0;    /*在此发出应答或非应答信号,ack=1,发送数据正常;ack=0表示被控器无应答或损坏。 */
else SDA=1;
_nop_();
_nop_();
SCL=1;
Some_Nop();       //保持数据时间 , 即SCL为高时间大于4.7μs
SCL=0;             //清时钟线，钳住I2C总线以便继续接收
_nop_();
_nop_();
}

void I2C_WriteByte(uint date) //I2C主机写从机地址、命令
{
uint i;
SCL=0;
Some_Nop();
for(i=0;i<8;i++)
{
if(date&0x80) SDA=1; /*判断发送位*/
     else  SDA=0;
     _nop_();
     SCL=1;          /*置时钟线为高，通知被控器开始接收数据位*/
     date<<=1;
     Some_Nop();
     SCL=0;
}
SDA=1;       //释放SDA，以便接收应答
_nop_();
_nop_();
}

unsigned int I2C_ReadByte() //I2C读从机发送的数据
{
uchar i;
uint k=0;
SDA=1;
for(i=0;i<8;i++)
{
SCL=0;
Some_Nop();
SCL=1;
      if(SDA==1) k |=0x01; /*读数据位,接收的数据位放入k中 */
k = k << 1;
   }
    SCL=0;
return k;
}

/*      读出BMP180内部数据,MSB、LSB             */
/*********************************************************/
int Multiple_read0(uchar ST_Address)
{
//uchar st_Address;
long _data0;
long MSB=0;
long LSB=0;

I2C_Start();                         //起始信号
I2C_WriteByte(0xee); //发送设备地址,写信号
I2C_ACK(1);    //应答
I2C_WriteByte(ST_Address);          //发送存储单元地址
I2C_ACK(1);    //应答

I2C_Start();                         //重新起始信号
I2C_WriteByte(0xef);       //发送设备地址+读信号
I2C_ACK(1);    //应答
MSB = I2C_ReadByte();
I2C_ACK(1);    //应答
LSB = I2C_ReadByte();
I2C_ACK(0);
I2C_Stop();

_data0 = (MSB << 8)|(LSB);
return _data0;

}

void Init_BMP180()    //BMP180初始化
{
ac1 = Multiple_read0(0xAA);
ac2 = Multiple_read0(0xAC);
ac3 = Multiple_read0(0xAE);
ac4 = Multiple_read0(0xB0);
ac5 = Multiple_read0(0xB2);
ac6 = Multiple_read0(0xB4);
b1 =  Multiple_read0(0xB6);
b2 =  Multiple_read0(0xB8);
mb =  Multiple_read0(0xBA);
mc =  Multiple_read0(0xBC);
md =  Multiple_read0(0xBE);
}

//**********************读温度**********************
int bmp180ReadTemp(void)
{
int Tempreture = 0;

I2C_Start();                //起始信号
I2C_WriteByte(0xee); //发送设备地址,写信号
I2C_ACK(1);
I2C_WriteByte(0xF4);       // 存储单元地址
I2C_ACK(1);
I2C_WriteByte(0x2E);    // 向存储单元写入0x2e
I2C_ACK(0);
I2C_Stop();    //发送停止信号
Delay_ms(4); //等待4.5ms

Tempreture =  Multiple_read0(0xF6);
//Tempreture = 0x00001111;
return Tempreture;
}

//**********************读气压****************************
long bmp180ReadPressure(void)
{
long Pressure = 0;
long m***=0;
int l***=0;
int XLSB=0;
I2C_Start();                //起始信号
I2C_WriteByte(0xee); //发送设备地址,写信号
I2C_ACK(1);
I2C_WriteByte(0xF4);       // 存储单元地址
I2C_ACK(1);
I2C_WriteByte(0x34+(OSS<<6));       // 向存储单元写入0x34+(OSS<<6)
I2C_ACK(0);
I2C_Stop();                   //发送停止信号
Delay_ms(2+2*OSS);       //等待


I2C_Start();                //起始信号
I2C_WriteByte(0xee); //发送设备地址,写信号
I2C_ACK(1);
I2C_WriteByte(0xF6);
I2C_ACK(1);

I2C_Start();                //重新起始信号
I2C_WriteByte(0xef); //发送设备地址,读信号
I2C_ACK(1);
m*** = I2C_ReadByte();
I2C_ACK(1);
l*** = I2C_ReadByte();
I2C_ACK(1);
XLSB = I2C_ReadByte();
I2C_ACK(0);
I2C_Stop();                   //发送停止信号

Pressure = (m***<<16 | l***<<8 | XLSB)>>(8-OSS);
return Pressure;
}

//**************************************************
void bmp180_Calculate()
{
long x1, x2, x3, b3, b5, b6, b7, p, ut, up;
unsigned long b4;

ut = bmp180ReadTemp(); // 读取温度数据
up = bmp180ReadPressure();  // 读取压强数据

x1 = ((ut - ac6)*(long)ac5) >> 15;
x2 = ((long) mc << 11) / (x1 + md);
b5 = x1 + x2;
temperature = ((b5 + 8) >> 4);

   b6 = b5 - 4000;

   // Calculate B3
   x1 = (b2 * (b6 * b6)>>12)>>11;
   x2 = (ac2 * b6)>>11;
   x3 = x1 + x2;
   b3 = (((((long)ac1)*4 + x3)<>2;

   // Calculate B4
   x1 = (ac3 * b6)>>13;
   x2 = (b1 * ((b6 * b6)>>12))>>16;
   x3 = ((x1 + x2) + 2)>>2;
   b4 = (ac4 * (unsigned long)(x3 + 32768))>>15;

   b7 = ((unsigned long)up - b3) * (50000>>OSS);
   if (b7 < 0x80000000)
      p = (b7<<1)/b4;
   else
      p = (b7/b4)<<1;

   x1 = (p>>8) * (p>>8);
   x1 = (x1 * 3038)>>16;
   x2 = (-7357 * p)>>16;
   pressure = p+((x1 + x2 + 3791)>>4);

height=(101325-pressure)*9;
}

void serial_init() //串口初始化
{
TMOD=0x21; //T1工作方式2,用于波特率发生器
TH1=0xf3; //12MHz 波特率2400bps
TL1=0xf3;
PCON &=0x7f; //波特率不倍增
SCON=0x50; //允许发送接收
ES=1; //允许串口中断
EA=1; //开总中断
TR1=1; //启动波特率发生
}

void putchar(unsigned char c)
{
SBUF=c;
while(!TI); //等待发送完成
TI=0; //清除TI标志，准备下次发送
}

void Next()
{
putchar(0x0d);
putchar(0x0a);
}

int main(void)
{
uchar i;
uchar j;
I2C_init();
Init_BMP180();
serial_init();
while(1)
{
Delay_s();
for(i=0;i<5;i++)
putchar(Comd0[i]); //发送命令0
bmp180_Calculate();

tempre[0]= 0x30+ temperature / 100;
tempre[1]= 0x30+ temperature / 100%10;
tempre[2]= 0x2e;
tempre[3]= 0x30+ temperature % 10;
tempre[4]= 0x60;
tempre[5]= 0x43;
for(j=0;j<6;j++)
putchar(tempre[j]);
Next();

}
}