Debounce InterruptIn
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DebouncedInterrupt.h@16:7eaa188de0f9, 2014-02-18 (annotated)
- Committer:
- kandangath
- Date:
- Tue Feb 18 20:22:31 2014 +0000
- Revision:
- 16:7eaa188de0f9
- Parent:
- 15:948e85b22efe
- Child:
- 17:96a51b236ba0
Default value for interrupt trigger
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kandangath | 0:ca5a0fee9f52 | 1 | |
kandangath | 15:948e85b22efe | 2 | /** A replacement for InterruptIn that debounces the interrupt |
kandangath | 15:948e85b22efe | 3 | * Anil Kandangath |
kandangath | 15:948e85b22efe | 4 | * |
kandangath | 15:948e85b22efe | 5 | * @code |
kandangath | 15:948e85b22efe | 6 | * |
kandangath | 15:948e85b22efe | 7 | * #include "DebouncedInterrupt.h" |
kandangath | 15:948e85b22efe | 8 | * |
kandangath | 15:948e85b22efe | 9 | * DebouncedInterrupt up_button(p15); |
kandangath | 15:948e85b22efe | 10 | * |
kandangath | 15:948e85b22efe | 11 | * void onUp() |
kandangath | 15:948e85b22efe | 12 | * { |
kandangath | 15:948e85b22efe | 13 | * // Do Something |
kandangath | 15:948e85b22efe | 14 | * } |
kandangath | 15:948e85b22efe | 15 | * |
kandangath | 15:948e85b22efe | 16 | * int main() |
kandangath | 15:948e85b22efe | 17 | * { |
kandangath | 15:948e85b22efe | 18 | * up_button.attach(&onUp, INT_FALL, 100); |
kandangath | 15:948e85b22efe | 19 | * while(1) { |
kandangath | 15:948e85b22efe | 20 | * ... |
kandangath | 15:948e85b22efe | 21 | * } |
kandangath | 15:948e85b22efe | 22 | * } |
kandangath | 15:948e85b22efe | 23 | * @endcode |
kandangath | 15:948e85b22efe | 24 | */ |
kandangath | 0:ca5a0fee9f52 | 25 | |
kandangath | 10:cb16d2957f8d | 26 | #ifndef DEBOUNCED_INTERRUPT_H |
kandangath | 10:cb16d2957f8d | 27 | #define DEBOUNCED_INTERRUPT_H |
kandangath | 0:ca5a0fee9f52 | 28 | |
kandangath | 0:ca5a0fee9f52 | 29 | #include <stdint.h> |
kandangath | 0:ca5a0fee9f52 | 30 | #include "mbed.h" |
kandangath | 0:ca5a0fee9f52 | 31 | |
kandangath | 4:19689187352e | 32 | enum interruptTrigger{ |
kandangath | 4:19689187352e | 33 | INT_FALL = 0, |
kandangath | 4:19689187352e | 34 | INT_RISE = 1 |
kandangath | 4:19689187352e | 35 | }; |
kandangath | 4:19689187352e | 36 | |
kandangath | 10:cb16d2957f8d | 37 | class DebouncedInterrupt { |
kandangath | 0:ca5a0fee9f52 | 38 | private: |
kandangath | 7:2d73e219dadf | 39 | unsigned int _debounce_us; |
kandangath | 10:cb16d2957f8d | 40 | InterruptIn *_in; |
kandangath | 14:da09706b92f5 | 41 | DigitalIn *_din; |
kandangath | 7:2d73e219dadf | 42 | |
kandangath | 13:09b53a088a9c | 43 | // Diagnostics |
kandangath | 13:09b53a088a9c | 44 | volatile unsigned int _bounce_count; |
kandangath | 13:09b53a088a9c | 45 | volatile unsigned int _last_bounce_count; |
kandangath | 13:09b53a088a9c | 46 | |
kandangath | 0:ca5a0fee9f52 | 47 | void (*fCallback)(void); |
kandangath | 3:e4b7033508d1 | 48 | void _onInterrupt(void); |
kandangath | 7:2d73e219dadf | 49 | void _callback(void); |
kandangath | 0:ca5a0fee9f52 | 50 | public: |
kandangath | 10:cb16d2957f8d | 51 | DebouncedInterrupt(PinName pin); |
kandangath | 10:cb16d2957f8d | 52 | ~DebouncedInterrupt(); |
kandangath | 10:cb16d2957f8d | 53 | |
kandangath | 10:cb16d2957f8d | 54 | // Start monitoring the interupt and attach a callback |
kandangath | 16:7eaa188de0f9 | 55 | void attach(void (*fptr)(void), const interruptTrigger& trigger=INT_FALL, const uint32_t& debounce_ms=10); |
kandangath | 10:cb16d2957f8d | 56 | |
kandangath | 10:cb16d2957f8d | 57 | // Stop monitoring the interrupt |
kandangath | 10:cb16d2957f8d | 58 | void reset(); |
kandangath | 10:cb16d2957f8d | 59 | |
kandangath | 10:cb16d2957f8d | 60 | |
kandangath | 7:2d73e219dadf | 61 | /* |
kandangath | 13:09b53a088a9c | 62 | * Get number of bounces |
kandangath | 13:09b53a088a9c | 63 | * @return: bounce count |
kandangath | 7:2d73e219dadf | 64 | */ |
kandangath | 13:09b53a088a9c | 65 | unsigned int get_bounce(); |
kandangath | 0:ca5a0fee9f52 | 66 | }; |
kandangath | 0:ca5a0fee9f52 | 67 | #endif |