basic functions for inverted pendulum

Dependencies:   MMA8451Q-configurable MMA845x mbed

Revision:
0:409d28bad15e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Nov 01 20:53:03 2015 +0000
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+http://mbed.org/users/mbed_official/code/mbed/builds/34e6b704fe68
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