mlx90614: added new sensor (ir temperature), there is an issue with repeated start bit in i2c thus the sensor return incorrect data

Signed-off-by: Kiveisha Yevgeniy <yevgeniy.kiveisha@intel.com>

src/mlx90614/mlx90614.h

@@ -0,0 +1,115 @@
+/*
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#pragma once
+
+#include <string>
+#include <mraa/i2c.h>
+
+#define DEVICE_ADDR         0x5A // device address
+
+// RAM
+#define MLX90614_RAWIR1     0x04
+#define MLX90614_RAWIR2     0x05
+#define MLX90614_TA         0x06
+#define MLX90614_TOBJ1      0x07
+#define MLX90614_TOBJ2      0x08
+// EEPROM
+#define MLX90614_TOMAX      0x20
+#define MLX90614_TOMIN      0x21
+#define MLX90614_PWMCTRL    0x22
+#define MLX90614_TARANGE    0x23
+#define MLX90614_EMISS      0x24
+#define MLX90614_CONFIG     0x25
+#define MLX90614_ADDR       0x0E
+#define MLX90614_ID1        0x3C
+#define MLX90614_ID2        0x3D
+#define MLX90614_ID3        0x3E
+#define MLX90614_ID4        0x3F
+
+#define HIGH                    1
+#define LOW                     0
+
+namespace upm {
+
+/**
+ * @brief C++ API for MLX90614 
+ *
+ * This file defines the MLX90614 C++ interface for libmlx90614
+ *
+ */
+class MLX90614 {
+    public:
+
+        /**
+         * Instanciates a MLX90614 object
+         *
+         * @param bus number of used bus
+         * @param devAddr addres of used i2c device
+         */
+        MLX90614 (int bus, int devAddr);
+
+        /**
+         * MLX90614 object destructor, basicaly it close i2c connection.
+         */
+        ~MLX90614 ();
+
+        /**
+         * Read object temperature in Fahrenheit
+         */
+        float readObjectTempF(void);
+
+        /**
+         * Read ambient temperature in Fahrenheit
+         */
+        float readAmbientTempF(void);
+        /**
+         * Read object temperature in Celsius
+         */
+        float readObjectTempC(void);
+
+        /**
+         * Read ambient temperature in Celsius
+         */
+        float readAmbientTempC(void);
+
+        /**
+         * Return name of the component
+         */
+        std::string name()
+        {
+            return m_name;
+        }
+    private:
+        std::string m_name;
+
+        int m_i2cAddr;
+        int m_bus;
+        mraa_i2c_context m_i2Ctx;
+
+        uint16_t i2cReadReg_N (int reg, unsigned int len, uint8_t * buffer);
+        mraa_result_t i2cWriteReg_N (uint8_t reg, unsigned int len, uint8_t * buffer);
+        float readTemperature (uint8_t address);
+};
+
+}