microphone: added new sensor

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

src/mic/mic.h

@@ -0,0 +1,86 @@
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@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 <maa/gpio.h>
+#include <maa/aio.h>
+
+struct thresholdContext {
+    long averageReading;
+    long runningAverage;
+    int averagedOver;
+};
+
+namespace upm {
+
+/**
+ * @brief C++ API for Microphone
+ *
+ * This file defines the Microphone Analog sensor
+ *
+ * @snippet mic-example.cxx Interesting
+ *
+ */
+class Microphone {
+    public:
+        /**
+         * Instanciates a Microphone object
+         *
+         * @param micPin pin where microphone is connected
+         */
+        Microphone(int micPin);
+
+        /**
+         * MAX31723 object destructor
+         */
+        ~Microphone();
+
+        /**
+         * Get samples from microphone according to provided window and
+         * number of samples
+         *
+         * @return freqMS time between each sample (in microseconds)
+         * @return numberOfSamples number of sample to sample for this window
+         * @return buffer bufer with sampled data
+         */
+        int getSampledWindow (unsigned int freqMS, unsigned int numberOfSamples, uint16_t * buffer);
+
+        /**
+         * Given sampled buffer this method will return TRUE/FALSE if threshold
+         * was reached
+         *
+         * @return threshold sample threshold
+         * @return buffer buffer with samples
+         * @return len bufer len
+         */
+        int findThreshold (thresholdContext* ctx, unsigned int threshold, uint16_t * buffer, unsigned int len);
+
+        void printGraph (thresholdContext* ctx);
+
+    private:
+        maa_aio_context    m_micCtx;
+};
+
+}