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:
10:cb16d2957f8d
Parent:
8:4b3ff16d5f91
Child:
11:af6d7dc34062
--- /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