barometer.c文件中的代碼
#include "barometer.h"
#include "usart.h"
#include "delay.h"
#define BMP085_SlaveAddress 0xee //¶¨ÒåÆ÷¼þÔÚIIC×ÜÏßÖеĴӵØÖ·
#define OSS 0 // Oversampling Setting (note: code is not set up to use other OSS values)
#define uchar unsigned char
#define uint unsigned int
void I2c_GPIO_Init()
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE );
GPIO_InitStructure.GPIO_Pin = I2C_Pin_SCL | I2C_Pin_SDA;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(ANO_GPIO_I2C, &GPIO_InitStructure);
}
//-----------------------------------
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 Delay5us()
//{
// u16 i=0;
// u8 time=5;
// while(time--)
// {
// i=10;
// while(i--)
// ;
// }
//}
//void Delay_ms(float time)
//{
// u16 i=0;
// time=time*1000;
// while(time--)
// {
// i=10;
// while(i--)
// ;
// }
//}
void Delay5us()
{
delay_us(5);
}
void Delay_ms(float time)
{
delay_ms(time);
}
void BMP085_Start()
{
SDA_H;
SCL_H;
Delay5us();
SDA_L ;
Delay5us();
SCL_L;
}
///**************************************
//????
//**************************************/
void BMP085_Stop()
{
SDA_L; //?????
SCL_H; //?????
Delay5us(); //??
SDA_H; //?????
Delay5us(); //??
}
///**************************************
//??????
//????:ack (0:ACK 1:NAK)
//**************************************/
void I2c_Soft_Ask()
{
SDA_L;
Delay5us();
SCL_H;
Delay5us();
SCL_L;
Delay5us();
}
void I2c_Soft_NoAsk()
{
SDA_H;
Delay5us();
SCL_H;
Delay5us();
SCL_L;
Delay5us();
}
void BMP085_SendACK(u8 ack)
{
if(ack==0)
{
I2c_Soft_Ask();
}
else
{
I2c_Soft_NoAsk();
}
}
///**************************************
//??????
//**************************************/
u8 BMP085_RecvACK()
{
u8 ErrTime = 0;
SCL_H;
Delay5us();
while(SDA_read)
{
ErrTime++;
if(ErrTime>50)
{
BMP085_Stop();
return 1;
}
}
SCL_L;
Delay5us();
return 0;
}
/**************************************
?IIC??????????
**************************************/
void BMP085_SendByte(u8 SendByte)
{
u8 i=8;
while(i--)
{
SCL_L;
Delay5us();
if(SendByte&0x80)
{
SDA_H;
}
else
{
SDA_L;
}
SendByte<<=1;
Delay5us();
SCL_H;
Delay5us();
SCL_L;
Delay5us();
}
BMP085_RecvACK();
}
/**************************************
?IIC??????????
**************************************/
unsigned char BMP085_RecvByte()
{
u8 i;
u8 dat = 0;
SDA_H; //??????,??????,
for (i=0; i<8; i++) //8????
{
dat <<= 1;
SCL_H; //?????
Delay5us(); //??
if(SDA_read)
{
dat|=0x01;
}
SCL_L; //?????
Delay5us(); //??
}
return dat;
}
void Single_Write(uchar SlaveAddress,uchar REG_Address,uchar REG_data)
{
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(SlaveAddress); //·¢ËÍÉ豸µØÖ·+дÐźÅ
BMP085_SendByte(REG_Address); //ÄÚ²¿¼Ä´æÆ÷µØÖ·
BMP085_SendByte(REG_data); //ÄÚ²¿¼Ä´æÆ÷Êý¾Ý
BMP085_Stop(); //·¢ËÍÍ£Ö¹ÐźÅ
}
uchar Single_Read(uchar REG_Address)
{ uchar REG_data;
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(BMP085_SlaveAddress); //·¢ËÍÉ豸µØÖ·+дÐźÅ
BMP085_SendByte(REG_Address); //·¢ËÍ´æ´¢µ¥ÔªµØÖ·
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(BMP085_SlaveAddress+1); //·¢ËÍÉ豸µØÖ·+¶ÁÐźÅ
REG_data=BMP085_RecvByte(); //¶Á³ö¼Ä´æÆ÷Êý¾Ý
BMP085_SendACK(1);
BMP085_Stop(); //Í£Ö¹ÐźÅ
return REG_data;
}
short Multiple_read(uchar ST_Address)
{
uchar msb, lsb;
short _data;
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(BMP085_SlaveAddress); //·¢ËÍÉ豸µØÖ·+дÐźÅ
BMP085_SendByte(ST_Address); //·¢ËÍ´æ´¢µ¥ÔªµØÖ·
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(BMP085_SlaveAddress+1); //·¢ËÍÉ豸µØÖ·+¶ÁÐźÅ
msb = BMP085_RecvByte(); //BUF[0]´æ´¢
BMP085_SendACK(0); //»ØÓ¦ACK
lsb = BMP085_RecvByte();
BMP085_SendACK(1); //×îºóÒ»¸öÊý¾ÝÐèÒª»ØNOACK
BMP085_Stop(); //Í£Ö¹ÐźÅ
Delay_ms(5);
_data = msb << 8;
_data |= lsb;
return _data;
}
//********************************************************************
long bmp085ReadTemp(void)
{
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(BMP085_SlaveAddress); //·¢ËÍÉ豸µØÖ·+дÐźÅ
BMP085_SendByte(0xF4); // write register address
BMP085_SendByte(0x2E); // write register data for temp
BMP085_Stop(); //·¢ËÍÍ£Ö¹ÐźÅ
Delay_ms(4.5); // max time is 4.5ms
return (long) Multiple_read(0xF6);
}
//*************************************************************
long bmp085ReadPressure(void)
{
long pressure = 0;
BMP085_Start(); //ÆðʼÐźÅ
BMP085_SendByte(BMP085_SlaveAddress); //·¢ËÍÉ豸µØÖ·+дÐźÅ
BMP085_SendByte(0xF4); // write register address
BMP085_SendByte(0x34); // write register data for pressure
BMP085_Stop(); //·¢ËÍÍ£Ö¹ÐźÅ
Delay_ms(25.5); // max time is 4.5ms
pressure = Multiple_read(0xF6);
pressure &= 0x0000FFFF;
return pressure;
//return (long) bmp085ReadShort(0xF6);
}
//³õʼ»¯BMP085£¬¸ù¾ÝÐèÒªÇë²Î¿¼pdf½øÐÐÐÞ¸Ä**************
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);
printf("AC1:%d\r\n",ac1);
printf("AC2:%d\r\n",ac2);
printf("AC3:%d\r\n",ac3);
printf("AC4:%d\r\n",ac4);
printf("AC5:%d\r\n",ac5);
printf("AC6:%d\r\n",ac6);
printf("b1:%d\r\n",b1);
printf("b2:%d\r\n",b2);
printf("mb:%d\r\n",mb);
printf("mc:%d\r\n",mc);
printf("md:%d\r\n",md);
}
void barometerInit()
{
I2c_GPIO_Init();
Init_BMP085();
}
float arry[20];
float mathArry(float * Arrydata,u8 num);
u8 i=0;
float data_filter(long measure_pressure)
{
u8 j=0,k;
float dataFlaterResult;
while(i<=19)
{
arry[i]=measure_pressure;
i++;
printf("i%d\r\n",i);
}
//printf("i%d\r\n",i);
for (;j<=18;j++)
{
arry[j]=arry[j+1];
// printf("j%d\r\n",j);
}
//printf("j%d\r\n",j);
arry[j]=measure_pressure;
j=0;
dataFlaterResult=mathArry(arry,20);
return dataFlaterResult;
}
float mathArry(float * Arrydata,u8 num)
{
u8 i=0;
float caculate=0.0;
for (i=0;i<num;i++)
{
caculate=caculate+ *(Arrydata+i)/num;
}
return caculate;
}
long temperature;
long pressure;
float filterPressure;
void bmp085ConvertMeasure()
{
long ut;
long up;
long x1, x2, b5, b6, x3, b3, p;
unsigned long b4, b7;
ut = bmp085ReadTemp();
up = bmp085ReadPressure();
//printf("ut:%d\r\n",ut);
// printf("up:%d\r\n",up);
x1 = ((long)ut - ac6) * ac5 >> 15;
x2 = ((long) mc << 11) / (x1 + md);
b5 = x1 + x2;
temperature = (b5 + 8) >> 4;
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);
filterPressure=data_filter(pressure);
//printf("**********************************************pressure:%d\r\n",pressure);
printf("%f\r\n",filterPressure);
}
barometer.h文件中的代碼
#ifndef __BAROMETER_H
#define __BAROMETER_H
#include "sys.h"
#define SCL_H GPIO_SetBits(ANO_GPIO_I2C, GPIO_Pin_6) /* SCL = 1 */
#define SCL_L GPIO_ResetBits(ANO_GPIO_I2C, GPIO_Pin_6) /* SCL = 0 */
#define SDA_H GPIO_SetBits(ANO_GPIO_I2C, GPIO_Pin_7) /* SDA = 1 */
#define SDA_L GPIO_ResetBits(ANO_GPIO_I2C, GPIO_Pin_7) /* SDA = 0 */
#define SDA_read GPIO_ReadInputDataBit(ANO_GPIO_I2C, GPIO_Pin_7) /* ?SDA???? */
/***************I2C GPIO??******************/
#define ANO_GPIO_I2C GPIOB
#define I2C_Pin_SCL GPIO_Pin_6
#define I2C_Pin_SDA GPIO_Pin_7
#define ANO_RCC_I2C RCC_APB2Periph_GPIOB
/*********************************************/
void barometerInit(void);
void bmp085ConvertMeasure(void);
#endif
main函數中的代碼
barometerInit();
while(1)
{
bmp085ConvertMeasure();
delay_ms(50);
}