Chris Styles
This class carries out software debouncing of Digitial in, and provides some method to look at details such as how many debounced rising and falling there have been, and how long the input has been in its current stable state.
DebouncedIn.h@0:672241227e0d, 2009-11-27 (annotated)
- Committer:
- chris
- Date:
- Fri Nov 27 16:05:32 2009 +0000
- Revision:
- 0:672241227e0d
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| chris | 0:672241227e0d | 1 | #include "mbed.h" |
| chris | 0:672241227e0d | 2 | |
| chris | 0:672241227e0d | 3 | class DebouncedIn { |
| chris | 0:672241227e0d | 4 | public: |
| chris | 0:672241227e0d | 5 | DebouncedIn(PinName in); |
| chris | 0:672241227e0d | 6 | |
| chris | 0:672241227e0d | 7 | int read (void); |
| chris | 0:672241227e0d | 8 | operator int(); |
| chris | 0:672241227e0d | 9 | |
| chris | 0:672241227e0d | 10 | int rising(void); |
| chris | 0:672241227e0d | 11 | int falling(void); |
| chris | 0:672241227e0d | 12 | int steady(void); |
| chris | 0:672241227e0d | 13 | |
| chris | 0:672241227e0d | 14 | private : |
| chris | 0:672241227e0d | 15 | // objects |
| chris | 0:672241227e0d | 16 | DigitalIn _in; |
| chris | 0:672241227e0d | 17 | Ticker _ticker; |
| chris | 0:672241227e0d | 18 | |
| chris | 0:672241227e0d | 19 | // function to take a sample, and update flags |
| chris | 0:672241227e0d | 20 | void _sample(void); |
| chris | 0:672241227e0d | 21 | |
| chris | 0:672241227e0d | 22 | // counters and flags |
| chris | 0:672241227e0d | 23 | int _samples; |
| chris | 0:672241227e0d | 24 | int _output; |
| chris | 0:672241227e0d | 25 | int _output_last; |
| chris | 0:672241227e0d | 26 | int _rising_flag; |
| chris | 0:672241227e0d | 27 | int _falling_flag; |
| chris | 0:672241227e0d | 28 | int _state_counter; |
| chris | 0:672241227e0d | 29 | |
| chris | 0:672241227e0d | 30 | }; |
| chris | 0:672241227e0d | 31 |