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) {}
}

DebouncedInterrupt.h

Committer:
kandangath
Date:
2014-02-18
Revision:
16:7eaa188de0f9
Parent:
15:948e85b22efe
Child:
17:96a51b236ba0

File content as of revision 16:7eaa188de0f9:


/** A replacement for InterruptIn that debounces the interrupt
 *  Anil Kandangath
 *
 * @code
 *
 * #include "DebouncedInterrupt.h"
 *
 * DebouncedInterrupt up_button(p15);
 * 
 * void onUp()
 * {
 *    // Do Something
 * }
 * 
 * int main()
 * {
 *     up_button.attach(&onUp, INT_FALL, 100);
 *     while(1) {
 *         ...
 *     }
 * }
 * @endcode
 */
 
#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;
    InterruptIn *_in;
    DigitalIn *_din;
    
    // Diagnostics
    volatile unsigned int _bounce_count;
    volatile unsigned int _last_bounce_count;
    
    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=INT_FALL, const uint32_t& debounce_ms=10);
   
    // Stop monitoring the interrupt
    void reset();
    
    
    /*
    * Get number of bounces 
    * @return: bounce count
    */
    unsigned int get_bounce();
};
#endif