Implements a simple leaky integrator integer value filter, handy for fast, simple, ADC output filtering. Implemented as described here: [[http://ece124web.groups.et.byu.net/references/readings/Simple%20Software%20Lowpass%20Filter.pdf|Simple Software Lowpass Filter.pdf]]
Dependents: AVC_20110423 WallBot_Simple AVC_2012
SimpleFilter.h
- Committer:
- shimniok
- Date:
- 2011-04-20
- Revision:
- 0:ac15e38daeb5
- Child:
- 1:70348515ed2f
File content as of revision 0:ac15e38daeb5:
/** SimpleFilter implements a simple low pass integer "leaky integrator" described here: * * http://ece124web.groups.et.byu.net/references/readings/Simple%20Software%20Lowpass%20Filter.pdf * * Well suited for filtering ADC integer values very quickly * * Michael Shimniok http://bot-thoughts.com/ */ class SimpleFilter { public: /** Creates a new filter object * * @param shift: the number of shifts to perform at each filtering input step; lower means higher bandwidth */ SimpleFilter(short shift); /** Supplies input to the filter and returns filtered output value * * @param value is the input value to the filter, e.g., some measurement * @returns the filtered output value */ short filter(short value); private: long _filter_value; short _shift; };