WizziLab / DebouncedInterrupt

A replacement for InterruptIn that debounces the interrupt.

Dependents:   D7A_Demo-Get-started CVtoOSCConverter EE3501keypad D7A_Localisation ... more

Fork of DebouncedInterrupt by Anil Kandangath

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) {}
}

Diff: DebouncedInterrupt.h

Revision:
22:9733f886810a
Parent:
21:34b95e1b2bf3
Child:
23:cd4042093f85
--- a/DebouncedInterrupt.h	Tue Feb 25 07:13:29 2014 +0000
+++ b/DebouncedInterrupt.h	Tue Feb 25 23:44:37 2014 +0000
@@ -4,6 +4,7 @@
 
 #include <stdint.h>
 #include "mbed.h"
+#include "FunctionPointer.h"
 
 /**
 typedef enum {
@@ -47,7 +48,6 @@
     volatile unsigned int _bounce_count;
     volatile unsigned int _last_bounce_count;
     
-    void (*fCallback)(void);
     void _onInterrupt(void);
     void _callback(void);
 public:
@@ -58,7 +58,25 @@
     void attach(void (*fptr)(void), const gpio_irq_event trigger, const uint32_t& debounce_ms=10);
     
     template<typename T>
-    void attach(T* cptr, void (*fptr)(void), const gpio_irq_event trigger, const uint32_t& debounce_ms=10);
+    void attach(T* tptr, void (T::*mptr)(void), const gpio_irq_event trigger, const uint32_t& debounce_ms=10) {
+        _fAttach.attach(tptr, mptr);
+        _last_bounce_count = _bounce_count = 0;
+        _debounce_us = 1000*debounce_ms;
+        _trigger = trigger;
+        
+        switch(trigger)
+        {
+            case IRQ_RISE:
+                _in->rise(tptr, &DebouncedInterrupt::_onInterrupt);
+                break;
+            case IRQ_FALL:
+                _in->fall(tptr, &DebouncedInterrupt::_onInterrupt);
+                break;
+            case IRQ_NONE:
+                reset(); // Unexpected. Clear callbacks.
+                break;
+        }
+    }
    
     // Stop monitoring the interrupt
     void reset();
@@ -69,5 +87,8 @@
     * @return: bounce count
     */
     unsigned int get_bounce();
+protected:
+//    https://github.com/mbedmicro/mbed/blob/master/libraries/mbed/api/FunctionPointer.h
+    FunctionPointer _fAttach;
 };
 #endif
\ No newline at end of file