bh1749: Add examples for all languages

* Examples for C/C++/Python/Java/JavaScript
* Add Java example to CMakeLists

Signed-off-by: Assam Boudjelthia <assam.boudjelthia@fi.rohmeurope.com>

examples/python/bh1749.py

@@ -0,0 +1,60 @@
+# 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, sys, signal, atexit
+from upm import pyupm_bh1749
+
+
+def main():
+    bh1749_sensor = pyupm_bh1749.BH1749()
+
+    bh1749_sensor.SensorInit(pyupm_bh1749.INT_JUDGE_1,
+						pyupm_bh1749.MEAS_240MS,
+						pyupm_bh1749.RGB_GAIN_1X,
+						pyupm_bh1749.IR_GAIN_1X,
+						pyupm_bh1749.RED)
+    bh1749_sensor.SetThresholdHigh(511)
+
+    # 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 = bh1749_sensor.GetMeasurementTime()
+    print("Color readings: ")
+    while sampleCounter > 0:
+        [r, g, b, ir, g2] = bh1749_sensor.GetMeasurements()
+        print ("R: %d, y: %d, G: %d, IR: %d, G2: %d" % (r, g, b, ir, g2))
+        
+        time.sleep(waitTime / 1000.0)
+        sampleCounter -= 1
+
+
+if __name__ == '__main__':
+    main()