+ initial version (not stable)

libraries/MS5611/MS5611.cpp

@@ -0,0 +1,135 @@
+//
+//    FILE: MS5611.cpp
+//  AUTHOR: Rob Tillaart
+// VERSION: 0.1.00
+// PURPOSE: MS5611 Temperature & Humidity library for Arduino
+//     URL:
+//
+// HISTORY:
+// 0.1.00 added temperature and Pressure code
+// 0.0.00 initial version by Rob Tillaart (15-okt-2014)
+//
+// Released to the public domain
+//
+
+#include "MS5611.h"
+
+#include <Wire.h>
+
+/////////////////////////////////////////////////////
+//
+// PUBLIC
+//
+MS5611::MS5611(uint8_t address)
+{
+    _address = address;
+    Wire.begin();
+    // TWBR = 12; // 400KHz
+}
+
+void MS5611::init()
+{
+    reset();
+    for (int reg = 0; reg < 8; reg++)
+    {
+        C[reg] = readProm(reg);
+        delay(10);
+    }
+}
+
+int MS5611::read(uint8_t bits)
+{
+    convertD1(bits);
+    if (_result) return _result;
+    int32_t D1 = readADC();
+    if (_result) return _result;
+    convertD2(8);
+    if (_result) return _result;
+    int32_t D2 = readADC();
+    if (_result) return _result;
+
+    // PAGE 7/20 of the datasheet
+    int32_t dT = D2 - C[5] * 256L;
+    temperature = 2000 + (dT * C[6])/8388608L;
+
+    int64_t offset = C[2] * 65536L + (C[4] * dT ) / 128L;
+    int64_t sens = C[1] * 32768L + (C[3] * dT ) / 256L;
+    pressure = ((D1 * sens)/2097152L - offset) / 32768L;
+}
+
+int MS5611::getLastResult()
+{
+    return _result;
+}
+
+/////////////////////////////////////////////////////
+//
+// PRIVATE
+//
+void MS5611::reset()
+{
+    command(0x1E);
+}
+
+void MS5611::convertD1(uint8_t bits)
+{
+    bits = constrain(bits, 8, 12);
+    int offset = (bits - 8) * 2;
+    command(0x40 + offset);
+}
+
+void MS5611::convertD2(uint8_t bits)
+{
+    bits = constrain(bits, 8, 12);
+    int offset = (bits - 8) * 2;
+    command(0x50 + offset);
+}
+
+uint16_t MS5611::readProm(uint8_t reg)
+{
+    reg = constrain(reg, 0, 7);
+    reg = reg * 2;
+    command(0xA0 + reg);
+    if (_result == 0)
+    {
+        int nr = Wire.requestFrom(_address, (uint8_t)2);
+        if (nr >= 2)
+        {
+            uint16_t val = Wire.read() * 256;
+            val += Wire.read();
+            return val;
+        }
+        return 0;
+    }
+    return 0;
+}
+
+int32_t MS5611::readADC()
+{
+    Wire.beginTransmission(_address);
+    Wire.write(0x00);
+    _result = Wire.endTransmission();
+    if (_result == 0)
+    {
+        int nr = Wire.requestFrom(_address, (uint8_t)3);
+        if (nr >= 3)
+        {
+            uint32_t val = Wire.read() * 65536L;
+            val += Wire.read() * 256;
+            val += Wire.read();
+            return val;
+        }
+        return 0L;
+    }
+    return 0L;
+}
+
+void MS5611::command(uint8_t command)
+{
+    Wire.beginTransmission(_address);
+    Wire.write(command);
+    _result = Wire.endTransmission();
+}
+//
+// END OF FILE
+//

libraries/MS5611/MS5611.h

@@ -0,0 +1,49 @@
+//
+//    FILE: MS5611.h
+//  AUTHOR: Rob Tillaart
+// VERSION: 0.1.00
+// PURPOSE: MS5611 Temperature & Pressure library for Arduino
+//     URL:
+//
+// HISTORY:
+// see MS5611.cpp file
+//
+
+#ifndef MS5611_h
+#define MS5611_h
+
+#if ARDUINO < 100
+#include <WProgram.h>
+#else
+#include <Arduino.h>
+#endif
+
+#define MS5611_LIB_VERSION "0.1.00"
+
+class MS5611
+{
+public:
+    MS5611(uint8_t address);
+
+    void init();
+    int read();
+    int32_t temperature;
+    int32_t pressure;
+    int getLastResult();
+
+private:
+    void reset();
+    void convertD1(uint8_t bits);
+    void convertD2(uint8_t bits);
+    int32_t  readADC();
+    uint16_t readProm(uint8_t reg);
+    void command(uint8_t command);
+
+    uint8_t _address;
+    int _result;
+    uint16_t C[8];
+};
+#endif
+//
+// END OF FILE
+//