rhusb: Initial implementation

The driver implements support for the Omega RH-USB Humidity Probe with
Temperature sensor.  It connects via an integrated USB cable, and
appears as a serial port.

It does not currently work with Edison (as of this date) due to
missing ftdi_sio and usbserial kernel support.

It was implemented and tested on the Galileo 2.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/c++/CMakeLists.txt

@@ -238,6 +238,7 @@ if (MODBUS_FOUND)
   add_example (hwxpxx)
 endif()
 add_example (hdxxvxta)
+add_example (rhusb)
 
 # These are special cases where you specify example binary, source file and module(s)
 include_directories (${PROJECT_SOURCE_DIR}/src)

examples/c++/rhusb.cxx

@@ -0,0 +1,88 @@
+/*
+ * 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 <iostream>
+#include <signal.h>
+
+#include "rhusb.h"
+
+using namespace std;
+
+bool shouldRun = true;
+
+void sig_handler(int signo)
+{
+  if (signo == SIGINT)
+    shouldRun = false;
+}
+
+int main(int argc, char **argv)
+{
+  signal(SIGINT, sig_handler);
+
+//! [Interesting]
+
+  string defaultDev = "/dev/ttyUSB0";
+
+  // if an argument was specified, use it as the device instead
+  if (argc > 1)
+    defaultDev = string(argv[1]);
+
+  cout << "Using device " << defaultDev << endl;
+  cout << "Initializing..." << endl;
+
+  // Instantiate an RHUSB instance on defaultDev
+  upm::RHUSB sensor(defaultDev);
+
+  // output the firmware ID
+  cout << "Firmware ID: " << sensor.getFirmwareID() << endl;
+  cout << endl;
+
+  // update and print available values every second
+  while (shouldRun)
+    {
+      // update our values from the sensor
+      sensor.update();
+
+      // we show both C and F for temperature
+      cout << "Temperature: " << sensor.getTemperature()
+           << " C / " << sensor.getTemperature(true) << " F"
+           << endl;
+
+      cout << "Humidity: " << sensor.getHumidity()
+           << " %" << endl;
+
+      cout << endl;
+
+      sleep(1);
+    }
+
+
+  cout << "Exiting..." << endl;
+
+//! [Interesting]
+
+  return 0;
+}

examples/javascript/rhusb.js

@@ -0,0 +1,76 @@
+/*jslint node:true, vars:true, bitwise:true, unparam:true */
+/*jshint unused:true */
+
+/*
+ * 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.
+ */
+
+
+var sensorObj = require('jsupm_rhusb');
+
+
+/************** Main code **************/
+
+var defaultDev = "/dev/ttyUSB0";
+
+// if an argument was specified, use it as the device instead
+if (process.argv.length > 2)
+{
+    defaultDev = process.argv[2];
+}
+
+console.log("Using device " + defaultDev);
+console.log("Initializing...");
+
+// Instantiate an RHUSB instance on defaultDev
+var sensor = new sensorObj.RHUSB(defaultDev);
+
+// output the firmware ID
+console.log("Firmware ID:", sensor.getFirmwareID());
+console.log("");
+
+// update and print available values every second
+setInterval(function()
+{
+    // update our values from the sensor
+    sensor.update();
+
+    // we show both C and F for temperature
+    console.log("Temperature:", sensor.getTemperature(),
+                "C /", sensor.getTemperature(true), "F");
+
+    console.log("Humidity:", sensor.getHumidity(), "%");
+
+    console.log("");
+
+}, 1000);
+
+
+process.on('SIGINT', function()
+{
+    sensor = null;
+    sensorObj.cleanUp();
+    sensorObj = null;
+    console.log("Exiting...");
+    process.exit(0);
+});

examples/python/rhusb.py

@@ -0,0 +1,69 @@
+#!/usr/bin/python
+# 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.
+
+import time, sys, signal, atexit
+import pyupm_rhusb as sensorObj
+
+## Exit handlers ##
+# This function stops python from printing a stacktrace when you hit control-C
+def SIGINTHandler(signum, frame):
+	raise SystemExit
+
+# This function lets you run code on exit
+def exitHandler():
+	print "Exiting..."
+	sys.exit(0)
+
+# Register exit handlers
+atexit.register(exitHandler)
+signal.signal(signal.SIGINT, SIGINTHandler)
+
+defaultDev = "/dev/ttyUSB0"
+
+# if an argument was specified, use it as the device instead
+if (len(sys.argv) > 1):
+        defaultDev = sys.argv[1]
+
+print "Using device", defaultDev
+print "Initializing..."
+
+# Instantiate an RHUSB instance on defaultDev
+sensor = sensorObj.RHUSB(defaultDev)
+
+# output the firmware ID
+print "Firmware ID:", sensor.getFirmwareID()
+print
+
+# update and print available values every second
+while (1):
+        # update our values from the sensor
+        sensor.update()
+
+        # we show both C and F for temperature
+        print "Temperature:", sensor.getTemperature(), "C /",
+        print sensor.getTemperature(True), "F"
+
+        print "Humidity:", sensor.getHumidity(), "%"
+
+        print
+	time.sleep(1)