publish libraries to avoid users to have to download them one by one

lib/SFE_BMP180/SFE_BMP180.h

@@ -0,0 +1,121 @@
+/*
+	SFE_BMP180.h
+	Bosch BMP180 pressure sensor library for the Arduino microcontroller
+	Mike Grusin, SparkFun Electronics
+
+	Uses floating-point equations from the Weather Station Data Logger project
+	http://wmrx00.sourceforge.net/
+	http://wmrx00.sourceforge.net/Arduino/BMP085-Calcs.pdf
+
+	Forked from BMP085 library by M.Grusin
+
+	version 1.0 2013/09/20 initial version
+	
+	Our example code uses the "beerware" license. You can do anything
+	you like with this code. No really, anything. If you find it useful,
+	buy me a (root) beer someday.
+*/
+
+#ifndef SFE_BMP180_h
+#define SFE_BMP180_h
+
+#if defined(ARDUINO) && ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+
+class SFE_BMP180
+{
+	public:
+		SFE_BMP180(); // base type
+
+		char begin();
+			// call pressure.begin() to initialize BMP180 before use
+			// returns 1 if success, 0 if failure (bad component or I2C bus shorted?)
+		
+		char startTemperature(void);
+			// command BMP180 to start a temperature measurement
+			// returns (number of ms to wait) for success, 0 for fail
+
+		char getTemperature(double &T);
+			// return temperature measurement from previous startTemperature command
+			// places returned value in T variable (deg C)
+			// returns 1 for success, 0 for fail
+
+		char startPressure(char oversampling);
+			// command BMP180 to start a pressure measurement
+			// oversampling: 0 - 3 for oversampling value
+			// returns (number of ms to wait) for success, 0 for fail
+
+		char getPressure(double &P, double &T);
+			// return absolute pressure measurement from previous startPressure command
+			// note: requires previous temperature measurement in variable T
+			// places returned value in P variable (mbar)
+			// returns 1 for success, 0 for fail
+
+		double sealevel(double P, double A);
+			// convert absolute pressure to sea-level pressure (as used in weather data)
+			// P: absolute pressure (mbar)
+			// A: current altitude (meters)
+			// returns sealevel pressure in mbar
+
+		double altitude(double P, double P0);
+			// convert absolute pressure to altitude (given baseline pressure; sea-level, runway, etc.)
+			// P: absolute pressure (mbar)
+			// P0: fixed baseline pressure (mbar)
+			// returns signed altitude in meters
+
+		char getError(void);
+			// If any library command fails, you can retrieve an extended
+			// error code using this command. Errors are from the wire library: 
+			// 0 = Success
+			// 1 = Data too long to fit in transmit buffer
+			// 2 = Received NACK on transmit of address
+			// 3 = Received NACK on transmit of data
+			// 4 = Other error
+
+	private:
+	
+		char readInt(char address, int &value);
+			// read an signed int (16 bits) from a BMP180 register
+			// address: BMP180 register address
+			// value: external signed int for returned value (16 bits)
+			// returns 1 for success, 0 for fail, with result in value
+
+		char readUInt(char address, unsigned int &value);
+			// read an unsigned int (16 bits) from a BMP180 register
+			// address: BMP180 register address
+			// value: external unsigned int for returned value (16 bits)
+			// returns 1 for success, 0 for fail, with result in value
+
+		char readBytes(unsigned char *values, char length);
+			// read a number of bytes from a BMP180 register
+			// values: array of char with register address in first location [0]
+			// length: number of bytes to read back
+			// returns 1 for success, 0 for fail, with read bytes in values[] array
+			
+		char writeBytes(unsigned char *values, char length);
+			// write a number of bytes to a BMP180 register (and consecutive subsequent registers)
+			// values: array of char with register address in first location [0]
+			// length: number of bytes to write
+			// returns 1 for success, 0 for fail
+			
+		int AC1,AC2,AC3,VB1,VB2,MB,MC,MD;
+		unsigned int AC4,AC5,AC6; 
+		double c5,c6,mc,md,x0,x1,x2,y0,y1,y2,p0,p1,p2;
+		char _error;
+};
+
+#define BMP180_ADDR 0x77 // 7-bit address
+
+#define	BMP180_REG_CONTROL 0xF4
+#define	BMP180_REG_RESULT 0xF6
+
+#define	BMP180_COMMAND_TEMPERATURE 0x2E
+#define	BMP180_COMMAND_PRESSURE0 0x34
+#define	BMP180_COMMAND_PRESSURE1 0x74
+#define	BMP180_COMMAND_PRESSURE2 0xB4
+#define	BMP180_COMMAND_PRESSURE3 0xF4
+
+#endif