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

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

src/hcsr04/CMakeLists.txt

@@ -0,0 +1,4 @@
+set (libname "hcsr04")
+add_library (hcsr04 SHARED hcsr04.cxx)
+include_directories (${MAA_INCLUDE_DIR})
+target_link_libraries (hcsr04 ${MAA_LIBRARIES})

src/hcsr04/hcsr04.cxx

@@ -0,0 +1,94 @@
+/*
+ * 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.
+ */
+
+#include <iostream>
+#include <unistd.h>
+#include <stdlib.h>
+#include <functional>
+
+#include "hcsr04.h"
+
+using namespace upm;
+
+HCSR04::HCSR04 (uint8_t triggerPin, uint8_t echoPin, void (*fptr)(void)) {
+    maa_result_t error  = MAA_SUCCESS;
+    m_name              = "HCSR04";
+
+    m_pwmTriggerCtx     = maa_pwm_init (triggerPin);
+    if (m_pwmTriggerCtx == NULL) {
+        std::cout << "PWM context is NULL" << std::endl;
+        exit (1);
+    }
+
+    maa_init();
+    m_echoPinCtx = maa_gpio_init(echoPin);
+    if (m_echoPinCtx == NULL) {
+        fprintf (stderr, "Are you sure that pin%d you requested is valid on your platform?", echoPin);
+        exit (1);
+    }
+
+    maa_gpio_dir(m_echoPinCtx, MAA_GPIO_IN);
+    gpio_edge_t edge = MAA_GPIO_EDGE_BOTH;
+    maa_gpio_isr (m_echoPinCtx, edge, fptr);
+}
+
+HCSR04::~HCSR04 () {
+    maa_result_t error = MAA_SUCCESS;
+
+    maa_pwm_close (m_pwmTriggerCtx);
+    error = maa_gpio_close (m_echoPinCtx);
+    if (error != MAA_SUCCESS) {
+        maa_result_print (error);
+    }
+}
+
+int
+HCSR04::getDistance () {
+    maa_pwm_enable (m_pwmTriggerCtx, 1);
+    maa_pwm_period_us (m_pwmTriggerCtx, MAX_PERIOD);
+    maa_pwm_pulsewidth_us (m_pwmTriggerCtx, TRIGGER_PULSE);
+    maa_pwm_enable (m_pwmTriggerCtx, 0);
+
+    m_doWork = 0;
+    m_InterruptCounter = 0;
+    while (!m_doWork) {
+        sleep (1);
+    }
+
+    return m_FallingTimeStamp - m_RisingTimeStamp;
+}
+
+void
+HCSR04::ackEdgeDetected () {
+    struct timeval timer;
+    gettimeofday(&timer, NULL);
+
+    ++m_InterruptCounter;
+    if (!(m_InterruptCounter % 2)) {
+        m_FallingTimeStamp  = 1000000 * timer.tv_sec + timer.tv_usec;
+        m_doWork = 1;
+    } else {
+        m_RisingTimeStamp = 1000000 * timer.tv_sec + timer.tv_usec;
+    }
+}

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;
+};
+
+}

src/hcsr04/jsupm_hcsr04.i

@@ -0,0 +1,7 @@
+%module jsupm_hcsr04
+
+%{
+    #include "hcsr04.h"
+%}
+
+%include "hcsr04.h"

src/hcsr04/pyupm_hcsr04.i

@@ -0,0 +1,8 @@
+%module pyupm_hcsr04
+
+%feature("autodoc", "3");
+
+%include "hcsr04.h"
+%{
+    #include "hcsr04.h"
+%}