Allan Green
/
touchpad
..
filters.h@0:ff5187998c84, 2013-02-01 (annotated)
- Committer:
- allanalpha
- Date:
- Fri Feb 01 15:24:15 2013 +0000
- Revision:
- 0:ff5187998c84
what ev
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
allanalpha | 0:ff5187998c84 | 1 | /* |
allanalpha | 0:ff5187998c84 | 2 | mbed touchpad & accelerometer experiments. |
allanalpha | 0:ff5187998c84 | 3 | |
allanalpha | 0:ff5187998c84 | 4 | CPV, 14/09/2009 |
allanalpha | 0:ff5187998c84 | 5 | */ |
allanalpha | 0:ff5187998c84 | 6 | |
allanalpha | 0:ff5187998c84 | 7 | |
allanalpha | 0:ff5187998c84 | 8 | #ifndef __FILTERS_H__ |
allanalpha | 0:ff5187998c84 | 9 | #define __FILTERS_H__ |
allanalpha | 0:ff5187998c84 | 10 | |
allanalpha | 0:ff5187998c84 | 11 | #define FILTER_MAX_SIZE 16 |
allanalpha | 0:ff5187998c84 | 12 | |
allanalpha | 0:ff5187998c84 | 13 | class FilterBoxF |
allanalpha | 0:ff5187998c84 | 14 | { |
allanalpha | 0:ff5187998c84 | 15 | public: |
allanalpha | 0:ff5187998c84 | 16 | FilterBoxF(void) { initialise(FILTER_MAX_SIZE); } |
allanalpha | 0:ff5187998c84 | 17 | void initialise(unsigned int size); |
allanalpha | 0:ff5187998c84 | 18 | float tick(float in); |
allanalpha | 0:ff5187998c84 | 19 | float get() { return m_out; } |
allanalpha | 0:ff5187998c84 | 20 | float operator()(void) { return m_out; } |
allanalpha | 0:ff5187998c84 | 21 | |
allanalpha | 0:ff5187998c84 | 22 | protected: |
allanalpha | 0:ff5187998c84 | 23 | float m_history[FILTER_MAX_SIZE]; |
allanalpha | 0:ff5187998c84 | 24 | unsigned int m_size; |
allanalpha | 0:ff5187998c84 | 25 | unsigned int m_index; |
allanalpha | 0:ff5187998c84 | 26 | float m_out; |
allanalpha | 0:ff5187998c84 | 27 | }; |
allanalpha | 0:ff5187998c84 | 28 | |
allanalpha | 0:ff5187998c84 | 29 | |
allanalpha | 0:ff5187998c84 | 30 | class FilterBoxI |
allanalpha | 0:ff5187998c84 | 31 | { |
allanalpha | 0:ff5187998c84 | 32 | public: |
allanalpha | 0:ff5187998c84 | 33 | FilterBoxI(void) { initialise(FILTER_MAX_SIZE); } |
allanalpha | 0:ff5187998c84 | 34 | void initialise(unsigned int size); |
allanalpha | 0:ff5187998c84 | 35 | int tick(int in); |
allanalpha | 0:ff5187998c84 | 36 | int operator()(void) { return m_out; } |
allanalpha | 0:ff5187998c84 | 37 | |
allanalpha | 0:ff5187998c84 | 38 | protected: |
allanalpha | 0:ff5187998c84 | 39 | int m_history[FILTER_MAX_SIZE]; |
allanalpha | 0:ff5187998c84 | 40 | unsigned int m_size; |
allanalpha | 0:ff5187998c84 | 41 | unsigned int m_index; |
allanalpha | 0:ff5187998c84 | 42 | int m_out; |
allanalpha | 0:ff5187998c84 | 43 | }; |
allanalpha | 0:ff5187998c84 | 44 | |
allanalpha | 0:ff5187998c84 | 45 | |
allanalpha | 0:ff5187998c84 | 46 | class FilterIirI |
allanalpha | 0:ff5187998c84 | 47 | { |
allanalpha | 0:ff5187998c84 | 48 | public: |
allanalpha | 0:ff5187998c84 | 49 | FilterIirI(void) { initialise(); } |
allanalpha | 0:ff5187998c84 | 50 | void initialise(int tau=1, int limit=0xffff); |
allanalpha | 0:ff5187998c84 | 51 | int tick(int in); |
allanalpha | 0:ff5187998c84 | 52 | int operator()(void) { return m_out; } |
allanalpha | 0:ff5187998c84 | 53 | |
allanalpha | 0:ff5187998c84 | 54 | protected: |
allanalpha | 0:ff5187998c84 | 55 | int m_out; |
allanalpha | 0:ff5187998c84 | 56 | int m_remainder; |
allanalpha | 0:ff5187998c84 | 57 | int m_limit; |
allanalpha | 0:ff5187998c84 | 58 | int m_tau; |
allanalpha | 0:ff5187998c84 | 59 | }; |
allanalpha | 0:ff5187998c84 | 60 | |
allanalpha | 0:ff5187998c84 | 61 | |
allanalpha | 0:ff5187998c84 | 62 | #endif // __FILTERS_H__ |