hka5: Initial implementation

This module implements support for the DFRobot Laser PM2.5 Sensor.  It
connects to a UART at 9600 baud.  This is the only baud rate
supported.  It optionally supports Reset and Set/Sleep gpios as well.

Signed-off-by: Jon Trulson <jtrulson@ics.com>

src/hka5/hka5.cxx

@@ -0,0 +1,80 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2016 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 <stdexcept>
+
+#include "hka5.hpp"
+
+using namespace upm;
+using namespace std;
+
+HKA5::HKA5(unsigned int uart, int set_pin, int reset_pin) :
+  m_hka5(hka5_init(uart, set_pin, reset_pin))
+{
+  if (!m_hka5)
+    throw std::runtime_error(string(__FUNCTION__)
+                             + ": hka5_init() failed");
+}
+
+HKA5::~HKA5()
+{
+  hka5_close(m_hka5);
+}
+
+void HKA5::enable(bool enable)
+{
+  if (hka5_enable(m_hka5, enable))
+    throw std::runtime_error(string(__FUNCTION__)
+                             + ": hka5_enable() failed");
+}
+
+void HKA5::reset()
+{
+  if (hka5_reset(m_hka5))
+    throw std::runtime_error(string(__FUNCTION__)
+                             + ": hka5_reset() failed");
+}
+
+void HKA5::update()
+{
+  if (hka5_update(m_hka5))
+    throw std::runtime_error(string(__FUNCTION__)
+                             + ": hka5_update() failed");
+}
+
+unsigned int HKA5::getPM1()
+{
+  return hka5_get_pm1(m_hka5);
+}
+
+unsigned int HKA5::getPM2_5()
+{
+  return hka5_get_pm2_5(m_hka5);
+}
+
+unsigned int HKA5::getPM10()
+{
+  return hka5_get_pm10(m_hka5);
+}