twoBMP085

有多個BMP085要同時使用時，可以用XCLR來開關每個模塊，HIGH是開，LOW是關

但是引用Adafruit_BMP085的函式庫時有很多的資料變數混用，所以改寫一下

在Adafruit_BMP085.h增加

public

void bmp085Calibration();

在Adafruit_BMP085.cpp增加

void Adafruit_BMP085::bmp085Calibration() {

ac1 = read16(BMP085_CAL_AC1);

ac2 = read16(BMP085_CAL_AC2);

ac3 = read16(BMP085_CAL_AC3);

ac4 = read16(BMP085_CAL_AC4);

ac5 = read16(BMP085_CAL_AC5);

ac6 = read16(BMP085_CAL_AC6);

b1 = read16(BMP085_CAL_B1);

b2 = read16(BMP085_CAL_B2);

mb = read16(BMP085_CAL_MB);

mc = read16(BMP085_CAL_MC);

md = read16(BMP085_CAL_MD);

}

#include <Wire.h>

#include <Adafruit_BMP085.h>

// VCC --> 5V

// GND --> Gnd

// SCL --> A5

// SDA --> A4

// EOC is not used, it signifies an end of conversion

// XCLR --> D8, D10

Adafruit_BMP085 bmp;

void setup() {

 pinMode(8,OUTPUT);

 pinMode(10,OUTPUT);

 digitalWrite(8,HIGH);

Serial.begin(9600);

if (!bmp.begin()) {

Serial.println("Could not find a valid BMP085 sensor, check wiring!");

while (1) {}

}

}

void loop() {

digitalWrite(8,HIGH);

readBMPData();

digitalWrite(8,LOW);

delay(500);

digitalWrite(10,HIGH);

readBMPData();

digitalWrite(10,LOW);

delay(500);

}

void readBMPData(){

bmp.bmp085Calibration();

Serial.print("BMP8Temperature = ");Serial.print(bmp.readTemperature());Serial.println(" *C");

Serial.print("Pressure = ");Serial.print(bmp.readPressure());Serial.println(" Pa");

// Calculate altitude assuming 'standard' barometric

// pressure of 1013.25 millibar = 101325 Pascal

Serial.print("Altitude = ");Serial.print(bmp.readAltitude());Serial.println(" meters");

Serial.print("Pressure at sealevel (calculated) = ");Serial.print(bmp.readSealevelPressure());Serial.println(" Pa");

// you can get a more precise measurement of altitude

// if you know the current sea level pressure which will

// vary with weather and such. If it is 1015 millibars

// that is equal to 101500 Pascals.

Serial.print("Real altitude = ");Serial.print(bmp.readAltitude(101500));Serial.println(" meters");

}