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) {} }
Revision 10:cb16d2957f8d, committed 2014-02-18
- Comitter:
- kandangath
- Date:
- Tue Feb 18 16:32:33 2014 +0000
- Parent:
- 9:970b74eb0407
- Child:
- 11:af6d7dc34062
- Commit message:
- Allow DebouncedInterrupt to be set with just the PinName
Changed in this revision
--- a/DebounceInterrupts.cpp Tue Feb 18 07:06:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,47 +0,0 @@ -#include "DebounceInterrupts.h" - -Timeout timeout; - -DebounceInterrupts::DebounceInterrupts(void (*fptr)(void), - InterruptIn *interruptIn, - const interruptTrigger& trigger, - const unsigned int& debounce_ms) -{ - fCallback = fptr; - _last_debounce_count = _debounce_count = 0; - - switch(trigger) { - case INT_RISE: - interruptIn->rise(this, &DebounceInterrupts::_onInterrupt); - break; - case INT_FALL: - interruptIn->fall(this, &DebounceInterrupts::_onInterrupt); - break; - default: - break; - } - - _debounce_us = 1000*debounce_ms; -} - -DebounceInterrupts::~DebounceInterrupts() -{ -} - -void DebounceInterrupts::_callback() -{ - _last_debounce_count = _debounce_count; - _debounce_count = 0; - fCallback(); -} - -void DebounceInterrupts::_onInterrupt() -{ - _debounce_count++; - timeout.attach_us(this, &DebounceInterrupts::_callback, _debounce_us); -} - -unsigned int DebounceInterrupts::get_debounce() -{ - return _last_debounce_count; -}
--- a/DebounceInterrupts.h Tue Feb 18 07:06:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,56 +0,0 @@ - -/** - * Debounces an InterruptIn - */ - -/* -Example: -InterruptIn up_button(p15); - -void onUp() -{ - // Do Something -} - -int main() -{ - DebounceInterrupts upD(&onUp, &up_button, INT_FALL, 100); - while(1) { - ... - } -} -*/ - -#ifndef DEBOUNCE_INTERRUPTS_H -#define DEBOUNCE_INTERRUPTS_H - -#include <stdint.h> -#include "mbed.h" - -enum interruptTrigger{ - INT_FALL = 0, - INT_RISE = 1 -}; - -class DebounceInterrupts { -private: - unsigned int _debounce_us; - unsigned int _debounce_count; - unsigned int _last_debounce_count; - - void (*fCallback)(void); - void _onInterrupt(void); - void _callback(void); -public: - DebounceInterrupts(void (*fptr)(void), /* function to be called after debounced InterruptIn */ - InterruptIn *interrupt, /* InterruptIn to monitor */ - const interruptTrigger& trigger, /* true: rise, false: fall */ - const uint32_t& debounce_ms=10); /* stability duration required */ - ~DebounceInterrupts(); - /* - * Get number of de-bounced interrupts - * @return: debounced count - */ - unsigned int get_debounce(); -}; -#endif \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DebouncedInterrupt.cpp Tue Feb 18 16:32:33 2014 +0000 @@ -0,0 +1,62 @@ +/** +* DebouncedInterrupt.cpp +**/ +#include "DebouncedInterrupt.h" + +Timeout timeout; + +DebouncedInterrupt::DebouncedInterrupt(PinName pin) +{ + _in = new InterruptIn(pin); +} + +DebouncedInterrupt::~DebouncedInterrupt() +{ +} + +void DebouncedInterrupt::attach(void (*fptr)(void), + const interruptTrigger& trigger, + const unsigned int& debounce_ms) +{ + if(fptr) { + fCallback = fptr; + _last_debounce_count = _debounce_count = 0; + + switch(trigger) { + case INT_RISE: + _in->rise(this, &DebouncedInterrupt::_onInterrupt); + break; + case INT_FALL: + _in->fall(this, &DebouncedInterrupt::_onInterrupt); + break; + default: + break; + } + + _debounce_us = 1000*debounce_ms; + } +} + +void DebouncedInterrupt::reset() +{ + timeout.detach(); +} + +unsigned int DebouncedInterrupt::get_debounce() +{ + return _last_debounce_count; +} + +void DebouncedInterrupt::_callback() +{ + _last_debounce_count = _debounce_count; + _debounce_count = 0; + fCallback(); +} + +void DebouncedInterrupt::_onInterrupt() +{ + _debounce_count++; + timeout.attach_us(this, &DebouncedInterrupt::_callback, _debounce_us); +} +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DebouncedInterrupt.h Tue Feb 18 16:32:33 2014 +0000 @@ -0,0 +1,62 @@ +/** +* DebouncedInterrupt.h +* Monitors and debounces an InterruptIn +**/ + +/** +Example: +InterruptIn up_button(p15); + +void onUp() +{ + // Do Something +} + +int main() +{ + DebouncedInterrupt upD(&onUp, &up_button, INT_FALL, 100); + while(1) { + ... + } +} +**/ + +#ifndef DEBOUNCED_INTERRUPT_H +#define DEBOUNCED_INTERRUPT_H + +#include <stdint.h> +#include "mbed.h" + +enum interruptTrigger{ + INT_FALL = 0, + INT_RISE = 1 +}; + +class DebouncedInterrupt { +private: + unsigned int _debounce_us; + unsigned int _debounce_count; + unsigned int _last_debounce_count; + InterruptIn *_in; + + void (*fCallback)(void); + void _onInterrupt(void); + void _callback(void); +public: + DebouncedInterrupt(PinName pin); + ~DebouncedInterrupt(); + + // Start monitoring the interupt and attach a callback + void attach(void (*fptr)(void), const interruptTrigger& trigger, const uint32_t& debounce_ms=10); + + // Stop monitoring the interrupt + void reset(); + + + /* + * Get number of de-bounced interrupts + * @return: debounced count + */ + unsigned int get_debounce(); +}; +#endif \ No newline at end of file