rgbringcoder: Initial implementation.

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

examples/python/rgbringcoder.py

@@ -0,0 +1,90 @@
+#!/usr/bin/python
+# Author: Jon Trulson <jtrulson@ics.com>
+# Copyright (c) 2015 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_rgbringcoder as upmRGBRingCoder
+
+# There are a lot of pins to hook up.  These pins are valid for the
+# Edison board, but may need to be adjusted for other platforms.
+
+# In order:
+# enable      - 4
+# latch       - 10
+# clear       - 11
+# clock       - 2
+# data        - 9
+# switch      - 7
+
+# red pwm     - 3
+# green pwm   - 5
+# blue pwm    - 6
+
+# encA        - 12
+# encB        - 13
+ringCoder = upmRGBRingCoder.RGBRingCoder(4, 10, 11, 2, 9, 7, 12, 13, 3, 
+                                         5, 6)
+
+## Exit handlers ##
+# This 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,
+# including functions from ringCoder
+def exitHandler():
+	print "Exiting"
+	sys.exit(0)
+
+# Register exit handlers
+atexit.register(exitHandler)
+signal.signal(signal.SIGINT, SIGINTHandler)
+
+
+spin = 0x0001;
+oldState = False;
+oldPos = 0;
+
+# Lets go green
+ringCoder.setRGBLED(0.99, 0.01, 0.99);
+
+while(1):
+        # you spin me round...
+        if ((spin & 0xffff) == 0):
+                spin = 0x0001
+    
+        ringCoder.setRingLEDS(spin)
+        spin <<= 1
+
+        # check button state
+        bstate = ringCoder.getButtonState()
+        if (bstate != oldState):
+                print "Button state changed from", oldState, " to ", bstate
+                oldState = bstate
+    
+        # check encoder position
+        epos = ringCoder.getEncoderPosition()
+        if (epos != oldPos):
+                print "Encoder position changed from", oldPos, "to", epos
+                oldPos = epos
+
+        time.sleep(0.1)