max30100: Initial commit - MAX30100 pulse oximeter

* c/c++ source
    * java/js/python/c/c++ examples
    * Doc image (png)
    * Tested on Intel Edison
    * TODO: Tuning for SpO2 reading

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/python/max30100.py

@@ -0,0 +1,71 @@
+#!/usr/bin/python
+# Author: Noel Eck <noel.eck@intel.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.
+
+from __future__ import print_function
+import time, sys, signal, atexit
+from upm import pyupm_max30100
+
+# Callback class derived from CXX Callback
+class mycallback(pyupm_max30100.Callback):
+    def __init__(self):
+        self.count = 0
+        pyupm_max30100.Callback.__init__(self)
+
+    def run(self, samp):
+        print("My callback sample IR: %d R: %d" % (samp.IR, samp.R))
+
+def main():
+    # Create an instance of the oximiter
+    # I2C bus 0
+    x = pyupm_max30100.MAX30100(0)
+
+    print ('Oximeter sensor example...')
+
+    # Create an instance of the mycallback class
+    cb = mycallback().__disown__()
+
+    # Read the temperature and version
+    print ("Temperature: %d C" % x.temperature())
+    print ("Version: 0x%04x" % x.version())
+
+    # Set high-res (50 Hz, 16-bit)
+    x.high_res_enable(True)
+
+    # Set to sample SpO2
+    x.mode(pyupm_max30100.MAX30100_MODE_SPO2_EN);
+
+    # Read continuously, stepping up the LED current every second,
+    # us GPIO 0 as the interrupt pin
+    x.sample_continuous(0, False, cb)
+    for i in range(16):
+        print("Setting LED current = %d" % i)
+        x.current(i, i)
+        time.sleep(1)
+
+    # Read individual samples
+    for i in range(10):
+        val = x.sample();
+        print("Single value IR: %d R: %d " % (val.IR, val.R))
+
+if __name__ == '__main__':
+    main()