经过多次努力，用STC90C52+BMP180+LCD1602做的温度气压高度计终于调试成功，效果如图所示，程序见附件。
制作出来的实物图：
单片机源程序如下:
- #include <REG52.H>
- #include <math.h> //Keil library
- #include <stdlib.h> //Keil library
- #include <stdio.h> //Keil library
- #include <INTRINS.H> //Keil library
- #define uchar unsigned char
- #define uint unsigned int
- #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)
- #define DataPort P0 //LCD1602数据端口
- sbit LCM_RS=P2^4; //LCD1602命令端口
- sbit LCM_RW=P2^5; //LCD1602命令端口
- sbit LCM_EN=P2^6; //LCD1602命令端口
- sbit SCL=P1^0; //IIC时钟引脚定义
- sbit SDA=P1^1; //IIC数据引脚定义
- int dis_data; //变量
- typedef unsigned char BYTE;
- typedef unsigned short WORD;
- long temperature;//温度值
- long pressure;//压力值
- long height;//相对海拔高度值
- 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)
- {
- unsigned int i,j;
- for(i=0;i<k;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 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 WriteDataLCM(uchar dataW)
- {
- WaitForEnable();
- LCM_RS=1;LCM_RW=0;_nop_();
- DataPort=dataW;_nop_();
- LCM_EN=1;_nop_();_nop_();LCM_EN=0;
- }
- /***********************************/
- 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();
- 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;
- }
- //*********************************************************
- //读出BMP085内部数据,连续两个
- //*********************************************************
- short Multiple_read(uchar ST_Address)
- {
- uchar msb, lsb;
- 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
- msb = BMP085_RecvByte(); //BUF[0]存储
- BMP085_SendACK(0); //回应ACK
- lsb = BMP085_RecvByte();
- BMP085_SendACK(1); //最后一个数据需要回NOACK
- BMP085_Stop(); //停止信号
- Delay5ms();
- _data = msb << 8;
- _data |= lsb;
- 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;
- }
- //**************************************************************
-
- //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()//换算
- {
- unsigned int ut;
- unsigned long up;
- long x1, x2, b5, b6, x3, b3, p;
- unsigned long b4, b7;
- ut = bmp085ReadTemp(); // 读取温度
- up = bmp085ReadPressure(); // 读取压强
- x1 = (((long)ut - (long)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)<<OSS) + 2)>>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)*843/100;
- DisplayOneChar(0,0,'T');//温度部分
- DisplayOneChar(1,0,':');
- DisplayOneChar(4,0,'.');
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
所有资料51hei提供下载:
STC90C52+BMP180+LCD1602温度气压高度计单片机程序.rar
(42.17 KB, 下载次数: 385)
|
[复制链接]
QQ好友和群
QQ空间
腾讯微博
腾讯朋友
收藏
淘帖
顶
踩
还不是很明白啊。。。
