hcsr04: Added new sonar module (not working properly yet)

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

src/hcsr04/hcsr04.h

@@ -0,0 +1,66 @@
+/*
+ * 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 <maa/aio.h>
+#include <maa/gpio.h>
+#include <maa/pwm.h>
+#include <sys/time.h>
+
+#define HIGH                   1
+#define LOW                    0
+
+#define MAX_PERIOD             7968
+#define TRIGGER_PULSE          10
+
+namespace upm {
+
+class HCSR04 {
+    public:
+        HCSR04 (uint8_t triggerPin, uint8_t echoPin, void (*fptr)(void));
+        ~HCSR04 ();
+        int getDistance ();
+        void ackEdgeDetected ();
+
+        uint8_t m_doWork;
+
+        std::string name()
+        {
+            return m_name;
+        }
+
+    private:
+        maa_pwm_context     m_pwmTriggerCtx;
+        maa_gpio_context    m_echoPinCtx;
+
+        uint8_t m_waitEcho;
+        long    m_RisingTimeStamp;
+        long    m_FallingTimeStamp;
+        uint8_t m_InterruptCounter;
+
+        std::string         m_name;
+};
+
+}