A replacement for InterruptIn that debounces the interrupt.
Dependents: D7A_Demo-Get-started CVtoOSCConverter EE3501keypad D7A_Localisation ... more
Fork of DebouncedInterrupt by
Example code:
#include "DebouncedInterrupt.h" DebouncedInterrupt up_button(USER_BUTTON); void onUp() { // Do Something } int main() { // Will immediatly call function and ignore other interrupts until timeout up_button.attach(&onUp, IRQ_FALL, 1000, true); // Will call function only if button has been held for the specified time //up_button.attach(&onUp, IRQ_FALL, 500, false); while(1) {} }
DebouncedInterrupt.h@25:2163ebb21aef, 2017-04-26 (annotated)
- Committer:
- Jeej
- Date:
- Wed Apr 26 11:02:18 2017 +0000
- Revision:
- 25:2163ebb21aef
- Parent:
- 23:cd4042093f85
- Child:
- 26:2df374d23986
Use mbed callback
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kandangath | 20:996ea2fc8d2d | 1 | |
kandangath | 20:996ea2fc8d2d | 2 | #ifndef DEBOUNCED_INTERRUPT_H |
kandangath | 20:996ea2fc8d2d | 3 | #define DEBOUNCED_INTERRUPT_H |
kandangath | 20:996ea2fc8d2d | 4 | |
kandangath | 20:996ea2fc8d2d | 5 | #include <stdint.h> |
kandangath | 20:996ea2fc8d2d | 6 | #include "mbed.h" |
kandangath | 20:996ea2fc8d2d | 7 | |
kandangath | 20:996ea2fc8d2d | 8 | /** |
kandangath | 20:996ea2fc8d2d | 9 | typedef enum { |
kandangath | 20:996ea2fc8d2d | 10 | IRQ_NONE, |
kandangath | 20:996ea2fc8d2d | 11 | IRQ_RISE, |
kandangath | 20:996ea2fc8d2d | 12 | IRQ_FALL |
kandangath | 20:996ea2fc8d2d | 13 | } gpio_irq_event; |
kandangath | 20:996ea2fc8d2d | 14 | **/ |
kandangath | 0:ca5a0fee9f52 | 15 | |
kandangath | 15:948e85b22efe | 16 | /** A replacement for InterruptIn that debounces the interrupt |
kandangath | 15:948e85b22efe | 17 | * |
kandangath | 20:996ea2fc8d2d | 18 | * Example: |
kandangath | 15:948e85b22efe | 19 | * @code |
kandangath | 15:948e85b22efe | 20 | * |
kandangath | 15:948e85b22efe | 21 | * #include "DebouncedInterrupt.h" |
kandangath | 15:948e85b22efe | 22 | * |
Jeej | 23:cd4042093f85 | 23 | * DebouncedInterrupt up_button(USER_BUTTON); |
kandangath | 15:948e85b22efe | 24 | * |
kandangath | 15:948e85b22efe | 25 | * void onUp() |
kandangath | 15:948e85b22efe | 26 | * { |
kandangath | 15:948e85b22efe | 27 | * // Do Something |
kandangath | 15:948e85b22efe | 28 | * } |
kandangath | 15:948e85b22efe | 29 | * |
kandangath | 15:948e85b22efe | 30 | * int main() |
kandangath | 15:948e85b22efe | 31 | * { |
Jeej | 23:cd4042093f85 | 32 | * // Will immediatly call function and ignore other interrupts until timeout |
Jeej | 23:cd4042093f85 | 33 | * up_button.attach(&onUp, IRQ_FALL, 1000, true); |
Jeej | 23:cd4042093f85 | 34 | * |
Jeej | 23:cd4042093f85 | 35 | * // Will call function only if button has been held for the specified time |
Jeej | 23:cd4042093f85 | 36 | * //up_button.attach(&onUp, IRQ_FALL, 500, false); |
Jeej | 23:cd4042093f85 | 37 | * |
kandangath | 15:948e85b22efe | 38 | * while(1) { |
kandangath | 15:948e85b22efe | 39 | * ... |
kandangath | 15:948e85b22efe | 40 | * } |
kandangath | 15:948e85b22efe | 41 | * } |
kandangath | 15:948e85b22efe | 42 | * @endcode |
kandangath | 15:948e85b22efe | 43 | */ |
kandangath | 10:cb16d2957f8d | 44 | class DebouncedInterrupt { |
kandangath | 0:ca5a0fee9f52 | 45 | private: |
kandangath | 7:2d73e219dadf | 46 | unsigned int _debounce_us; |
Jeej | 23:cd4042093f85 | 47 | bool _immediate; |
Jeej | 23:cd4042093f85 | 48 | bool _timeout_expired; |
kandangath | 10:cb16d2957f8d | 49 | InterruptIn *_in; |
kandangath | 14:da09706b92f5 | 50 | DigitalIn *_din; |
kandangath | 18:e6e9bc6402b7 | 51 | gpio_irq_event _trigger; |
Jeej | 23:cd4042093f85 | 52 | Timeout *_timeout; |
kandangath | 7:2d73e219dadf | 53 | |
kandangath | 13:09b53a088a9c | 54 | // Diagnostics |
kandangath | 13:09b53a088a9c | 55 | volatile unsigned int _bounce_count; |
kandangath | 13:09b53a088a9c | 56 | volatile unsigned int _last_bounce_count; |
kandangath | 13:09b53a088a9c | 57 | |
kandangath | 3:e4b7033508d1 | 58 | void _onInterrupt(void); |
kandangath | 7:2d73e219dadf | 59 | void _callback(void); |
kandangath | 0:ca5a0fee9f52 | 60 | public: |
kandangath | 10:cb16d2957f8d | 61 | DebouncedInterrupt(PinName pin); |
kandangath | 10:cb16d2957f8d | 62 | ~DebouncedInterrupt(); |
kandangath | 10:cb16d2957f8d | 63 | |
kandangath | 10:cb16d2957f8d | 64 | // Start monitoring the interupt and attach a callback |
Jeej | 23:cd4042093f85 | 65 | void attach(void (*fptr)(void), const gpio_irq_event trigger, const uint32_t debounce_ms=10, bool immediate=false); |
kandangath | 21:34b95e1b2bf3 | 66 | |
Jeej | 25:2163ebb21aef | 67 | template<typename T, typename M> |
Jeej | 25:2163ebb21aef | 68 | void attach(T *obj, M method, const gpio_irq_event trigger, const uint32_t debounce_ms=10, bool immediate=false) { |
Jeej | 25:2163ebb21aef | 69 | _fAttach.attach(callback(obj, method)); |
kandangath | 22:9733f886810a | 70 | _last_bounce_count = _bounce_count = 0; |
kandangath | 22:9733f886810a | 71 | _debounce_us = 1000*debounce_ms; |
kandangath | 22:9733f886810a | 72 | _trigger = trigger; |
kandangath | 22:9733f886810a | 73 | |
kandangath | 22:9733f886810a | 74 | switch(trigger) |
kandangath | 22:9733f886810a | 75 | { |
kandangath | 22:9733f886810a | 76 | case IRQ_RISE: |
Jeej | 25:2163ebb21aef | 77 | _in->rise(callback(this, &DebouncedInterrupt::_onInterrupt)); |
kandangath | 22:9733f886810a | 78 | break; |
kandangath | 22:9733f886810a | 79 | case IRQ_FALL: |
Jeej | 25:2163ebb21aef | 80 | _in->fall(callback(this, &DebouncedInterrupt::_onInterrupt)); |
kandangath | 22:9733f886810a | 81 | break; |
kandangath | 22:9733f886810a | 82 | case IRQ_NONE: |
kandangath | 22:9733f886810a | 83 | reset(); // Unexpected. Clear callbacks. |
kandangath | 22:9733f886810a | 84 | break; |
kandangath | 22:9733f886810a | 85 | } |
kandangath | 22:9733f886810a | 86 | } |
kandangath | 10:cb16d2957f8d | 87 | |
kandangath | 10:cb16d2957f8d | 88 | // Stop monitoring the interrupt |
kandangath | 10:cb16d2957f8d | 89 | void reset(); |
kandangath | 10:cb16d2957f8d | 90 | |
kandangath | 10:cb16d2957f8d | 91 | |
kandangath | 7:2d73e219dadf | 92 | /* |
kandangath | 13:09b53a088a9c | 93 | * Get number of bounces |
kandangath | 13:09b53a088a9c | 94 | * @return: bounce count |
kandangath | 7:2d73e219dadf | 95 | */ |
kandangath | 13:09b53a088a9c | 96 | unsigned int get_bounce(); |
kandangath | 22:9733f886810a | 97 | protected: |
kandangath | 22:9733f886810a | 98 | // https://github.com/mbedmicro/mbed/blob/master/libraries/mbed/api/FunctionPointer.h |
Jeej | 25:2163ebb21aef | 99 | Callback<void()> _fAttach; |
kandangath | 0:ca5a0fee9f52 | 100 | }; |
kandangath | 0:ca5a0fee9f52 | 101 | #endif |