BH1792: Add examples for all languages

- Examples for C/C++/Python/Java/JavaScript
- Add build line for java BH1792_Example

Signed-off-by: Assam Boudjelthia <assam.boudjelthia@fi.rohmeurope.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/python/bh1792.py

@@ -0,0 +1,58 @@
+# The MIT License (MIT)
+#
+# Author: Assam Boudjelthia
+# Copyright (c) 2018 Rohm Semiconductor.
+#
+# 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, datetime
+import sys
+import signal
+import atexit
+from upm import pyupm_bh1792
+
+def main():
+	bh1792_sensor = pyupm_bh1792.BH1792()
+	bh1792_sensor.SoftReset()
+	bh1792_sensor.EnableSyncMode(256, 32)
+	bh1792_sensor.StartMeasurement()
+
+	# Prevent stack printing on CTRL^C
+	def SIGINTHandler(signum, frame):
+		raise SystemExit
+
+	def exitHandler():
+		print("Exiting")
+		sys.exit(0)
+
+	atexit.register(exitHandler)
+	signal.signal(signal.SIGINT, SIGINTHandler)
+
+	sampleCounter = 10
+	waitTime = bh1792_sensor.GetMeasurementTimeMS()
+	
+	print("Heart beat sensor readings: ")
+	while sampleCounter > 0:
+		[off, on] = bh1792_sensor.GetGreenData()
+		print ("off: %d, on: %d, timestamp: %d msec" % (off, on, time.time() * 1000))
+		time.sleep(waitTime / 1000.0)
+		sampleCounter -= 1
+
+
+if __name__ == '__main__':
+    main()