max31723 :: added new temperature sensor (HAVE ISSUES WITH SPI)

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

src/max31723/max31723.h

@@ -0,0 +1,90 @@
+/*
+ * 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/aio.h>
+#include <mraa/gpio.h>
+#include <mraa/spi.h>
+
+#define HIGH                    1
+#define LOW                     0
+
+namespace upm {
+
+/**
+ * @brief C++ API for MAX31723 chip (Temperature sensor)
+ *
+ * This file defines the MAX31723 C++ interface for libmax31723
+ *
+ */
+class MAX31723 {
+    public:
+        static const uint8_t R_STS_READ_CMD     = 0x00;
+        static const uint8_t R_STS_WRITE_CMD    = 0x80;
+        static const uint8_t R_TEMPERATURE_LSB  = 0x01;
+        static const uint8_t R_TEMPERATURE_MSB  = 0x02;
+
+        /**
+         * Instanciates a MAX31723 object
+         *
+         * @param bus number of used bus
+         * @param devAddr addres of used i2c device
+         */
+        MAX31723 (int csn);
+
+        /**
+         * MAXDS3231M object destructor, basicaly it close i2c connection.
+         */
+        ~MAX31723 ();
+
+        /**
+         * Get on board temperature.
+         */
+        uint16_t getTemperature ();
+
+        /**
+         * Return name of the component
+         */
+        std::string name()
+        {
+            return m_name;
+        }
+    private:
+        std::string m_name;
+        mraa_spi_context        m_spi;
+        mraa_gpio_context       m_csnPinCtx;
+
+        /**
+         * Set chip select pin LOW
+         */
+        mraa_result_t CSOn ();
+
+        /**
+         * Set chip select pin HIGH
+         */
+        mraa_result_t CSOff ();
+};
+
+}