t8100: Initial implementation

This module implements support for the Amphenol Telaire Ventostat
T8100 Ventilation Controller with BACnet interface.  It may also
support the T8200 and T8300 models, but they have not been tested.

The Telaire Ventostat T8100 reports Temperature, Humidity and CO2
concentrations.  It supports an optional relay with a settable trigger
point.  The unit this driver was tested under did not support the
optional relay.  The temperature range supported is 0-50C, humidity is
0-100% non-condensing, and CO2 range is appoximately 0-2000 PPM for
the T8100.  Other sensors in this family support wider ranges.

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

src/t8100/t8100.cxx

@@ -0,0 +1,254 @@
+/*
+ * 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 <unistd.h>
+#include <assert.h>
+#include <errno.h>
+#include <iostream>
+#include <stdexcept>
+#include <string>
+
+#include "t8100.hpp"
+
+using namespace upm;
+using namespace std;
+
+// conversion from fahrenheit to celcius and back
+
+static float f2c(float f)
+{
+  return ((f - 32.0) / (9.0 / 5.0));
+}
+
+static float c2f(float c)
+{
+  return (c * (9.0 / 5.0) + 32.0);
+}
+
+
+T8100::T8100(uint32_t targetDeviceObjectID) :
+  BACNETUTIL(targetDeviceObjectID)
+{
+  setDebug(false);
+
+  // we disable this by default for performance reasons
+  checkReliability(false);
+
+  m_isTempInitialized = false;
+  m_isCelcius = false;
+
+  m_humidity = 0.0;
+  m_temperature = 0.0;
+  m_co2 = 0.0;
+  m_relayState = false;
+}
+
+T8100::~T8100()
+{
+}
+
+void T8100::update()
+{
+  if (!m_isTempInitialized)
+    {
+      // this will update internals so conversions work properly
+      getTemperatureScale();
+    }
+
+  float tmpF = getAnalogInput(AI_Temperature_Thermistor);
+
+  if (m_isCelcius)
+    m_temperature = tmpF;
+  else
+    m_temperature = f2c(tmpF);
+
+  m_humidity = getAnalogInput(AI_Relative_Humidity);
+  m_co2 = getAnalogInput(AI_CO2);
+  m_relayState = getBinaryInput(BI_Relay_State);
+}
+
+float T8100::getTemperature(bool fahrenheit)
+{
+  if (fahrenheit)
+    return c2f(m_temperature);
+  else
+    return m_temperature;
+}
+
+void T8100::setTemperatureScale(bool fahrenheit)
+{
+  setBinaryValue(BV_Temperature_Units, fahrenheit);
+
+  m_isTempInitialized = true;
+  m_isCelcius = (fahrenheit) ? false : true;
+}
+
+bool T8100::getTemperatureScale()
+{
+  bool scale = getBinaryValue(BV_Temperature_Units);
+
+  m_isTempInitialized = true;
+  m_isCelcius = !scale;
+
+  return scale;
+}
+
+float T8100::getTemperatureOffset()
+{
+  return getAnalogValue(AV_Temperature_Offset);
+}
+
+void T8100::setTemperatureOffset(float value)
+{
+  // Always in C...
+  if (value < -50.0 || value > 50.0)
+    {
+      throw std::out_of_range(std::string(__FUNCTION__)
+                              + ": value must be between -50 and 50,"
+                              + " in degrees Celcius");
+
+    }
+
+  setAnalogValue(AV_Temperature_Offset, value);
+}
+
+float T8100::getHumidityOffset()
+{
+  return getAnalogValue(AV_RH_Offset);
+}
+
+void T8100::setHumidityOffset(float value)
+{
+  if (value < -100.0 || value > 100.0)
+    {
+      throw std::out_of_range(std::string(__FUNCTION__)
+                              + ": value must be between -100 and 100");
+    }
+
+  setAnalogValue(AV_RH_Offset, value);
+}
+
+float T8100::getRelaySetPoint()
+{
+  return getAnalogValue(AV_Relay_Set_Point);
+}
+
+void T8100::setRelaySetPoint(float value)
+{
+  if (value < 0.00 || value > 65535.0)
+    {
+      throw std::out_of_range(std::string(__FUNCTION__)
+                              + ": value must be between 0 and 65535");
+    }
+
+  setAnalogValue(AV_Relay_Set_Point, value);
+}
+
+float T8100::getRelayHysteresis()
+{
+  return getAnalogValue(AV_Relay_Hysteresis);
+}
+
+void T8100::setRelayHysteresis(float value)
+{
+  if (value < 0.00 || value > 65535.0)
+    {
+      throw std::out_of_range(std::string(__FUNCTION__)
+                              + ": value must be between 0 and 65535");
+    }
+
+  setAnalogValue(AV_Relay_Hysteresis, value);
+}
+
+float T8100::getElevation()
+{
+  return getAnalogValue(AV_Elevation);
+}
+
+void T8100::setElevation(float value)
+{
+  if (value < 0.00 || value > 65535.0)
+    {
+      throw std::out_of_range(std::string(__FUNCTION__)
+                              + ": value must be between 0 and 65535");
+    }
+
+  setAnalogValue(AV_Elevation, value);
+}
+
+float T8100::getCalibrationSinglePoint()
+{
+  return getAnalogValue(AV_Calibration_Single_Point);
+}
+
+void T8100::setCalibrationSinglePoint(float value)
+{
+  if (value < 0.00 || value > 65535.0)
+    {
+      throw std::out_of_range(std::string(__FUNCTION__)
+                              + ": value must be between 0 and 65535");
+    }
+
+  setAnalogValue(AV_Calibration_Single_Point, value);
+}
+
+float T8100::getBaudRate()
+{
+  return getAnalogValue(AV_Baud_Rate);
+}
+
+float T8100::getMACAddress()
+{
+  return getAnalogValue(AV_MAC_Address);
+}
+
+bool T8100::getABCLogicState()
+{
+  return getBinaryValue(BV_ABC_Logic_State);
+}
+
+void T8100::setABCLogicState(bool value)
+{
+  setBinaryValue(BV_ABC_Logic_State, value);
+}
+
+bool T8100::getABCLogicReset()
+{
+  return getBinaryValue(BV_ABC_Logic_Reset);
+}
+
+void T8100::setABCLogicReset(bool value)
+{
+  setBinaryValue(BV_ABC_Logic_Reset, value);
+}
+
+bool T8100::getCO2Calibration()
+{
+  return getBinaryValue(BV_CO2_Calibration);
+}
+
+void T8100::setCO2Calibration(bool value)
+{
+  setBinaryValue(BV_CO2_Calibration, value);
+}