A replacement for InterruptIn that debounces the interrupt.
Dependents: D7A_Demo-Get-started CVtoOSCConverter EE3501keypad D7A_Localisation ... more
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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@10:cb16d2957f8d, 2014-02-18 (annotated)
- Committer:
- kandangath
- Date:
- Tue Feb 18 16:32:33 2014 +0000
- Revision:
- 10:cb16d2957f8d
- Parent:
- DebounceInterrupts.h@8:4b3ff16d5f91
- Child:
- 11:af6d7dc34062
Allow DebouncedInterrupt to be set with just the PinName
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kandangath | 10:cb16d2957f8d | 1 | /** |
kandangath | 10:cb16d2957f8d | 2 | * DebouncedInterrupt.h |
kandangath | 10:cb16d2957f8d | 3 | * Monitors and debounces an InterruptIn |
kandangath | 10:cb16d2957f8d | 4 | **/ |
kandangath | 0:ca5a0fee9f52 | 5 | |
kandangath | 0:ca5a0fee9f52 | 6 | /** |
kandangath | 5:3c0f741fb448 | 7 | Example: |
kandangath | 5:3c0f741fb448 | 8 | InterruptIn up_button(p15); |
kandangath | 5:3c0f741fb448 | 9 | |
kandangath | 5:3c0f741fb448 | 10 | void onUp() |
kandangath | 5:3c0f741fb448 | 11 | { |
kandangath | 5:3c0f741fb448 | 12 | // Do Something |
kandangath | 5:3c0f741fb448 | 13 | } |
kandangath | 5:3c0f741fb448 | 14 | |
kandangath | 5:3c0f741fb448 | 15 | int main() |
kandangath | 5:3c0f741fb448 | 16 | { |
kandangath | 10:cb16d2957f8d | 17 | DebouncedInterrupt upD(&onUp, &up_button, INT_FALL, 100); |
kandangath | 5:3c0f741fb448 | 18 | while(1) { |
kandangath | 5:3c0f741fb448 | 19 | ... |
kandangath | 5:3c0f741fb448 | 20 | } |
kandangath | 5:3c0f741fb448 | 21 | } |
kandangath | 10:cb16d2957f8d | 22 | **/ |
kandangath | 0:ca5a0fee9f52 | 23 | |
kandangath | 10:cb16d2957f8d | 24 | #ifndef DEBOUNCED_INTERRUPT_H |
kandangath | 10:cb16d2957f8d | 25 | #define DEBOUNCED_INTERRUPT_H |
kandangath | 0:ca5a0fee9f52 | 26 | |
kandangath | 0:ca5a0fee9f52 | 27 | #include <stdint.h> |
kandangath | 0:ca5a0fee9f52 | 28 | #include "mbed.h" |
kandangath | 0:ca5a0fee9f52 | 29 | |
kandangath | 4:19689187352e | 30 | enum interruptTrigger{ |
kandangath | 4:19689187352e | 31 | INT_FALL = 0, |
kandangath | 4:19689187352e | 32 | INT_RISE = 1 |
kandangath | 4:19689187352e | 33 | }; |
kandangath | 4:19689187352e | 34 | |
kandangath | 10:cb16d2957f8d | 35 | class DebouncedInterrupt { |
kandangath | 0:ca5a0fee9f52 | 36 | private: |
kandangath | 7:2d73e219dadf | 37 | unsigned int _debounce_us; |
kandangath | 7:2d73e219dadf | 38 | unsigned int _debounce_count; |
kandangath | 8:4b3ff16d5f91 | 39 | unsigned int _last_debounce_count; |
kandangath | 10:cb16d2957f8d | 40 | InterruptIn *_in; |
kandangath | 7:2d73e219dadf | 41 | |
kandangath | 0:ca5a0fee9f52 | 42 | void (*fCallback)(void); |
kandangath | 3:e4b7033508d1 | 43 | void _onInterrupt(void); |
kandangath | 7:2d73e219dadf | 44 | void _callback(void); |
kandangath | 0:ca5a0fee9f52 | 45 | public: |
kandangath | 10:cb16d2957f8d | 46 | DebouncedInterrupt(PinName pin); |
kandangath | 10:cb16d2957f8d | 47 | ~DebouncedInterrupt(); |
kandangath | 10:cb16d2957f8d | 48 | |
kandangath | 10:cb16d2957f8d | 49 | // Start monitoring the interupt and attach a callback |
kandangath | 10:cb16d2957f8d | 50 | void attach(void (*fptr)(void), const interruptTrigger& trigger, const uint32_t& debounce_ms=10); |
kandangath | 10:cb16d2957f8d | 51 | |
kandangath | 10:cb16d2957f8d | 52 | // Stop monitoring the interrupt |
kandangath | 10:cb16d2957f8d | 53 | void reset(); |
kandangath | 10:cb16d2957f8d | 54 | |
kandangath | 10:cb16d2957f8d | 55 | |
kandangath | 7:2d73e219dadf | 56 | /* |
kandangath | 7:2d73e219dadf | 57 | * Get number of de-bounced interrupts |
kandangath | 7:2d73e219dadf | 58 | * @return: debounced count |
kandangath | 7:2d73e219dadf | 59 | */ |
kandangath | 7:2d73e219dadf | 60 | unsigned int get_debounce(); |
kandangath | 0:ca5a0fee9f52 | 61 | }; |
kandangath | 0:ca5a0fee9f52 | 62 | #endif |