Bhakti Kulkarni / DebounceInterrupts

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Dependents:   Microwave_MBED MicrowaveSimulation_LPC1768 RTOS_Alarm_Clock USB_Project_Host ... more

DebouncedInterrupt.cpp@17:96a51b236ba0, 2014-02-18 (annotated)

Committer:
kandangath
Date:
Tue Feb 18 20:38:50 2014 +0000
Revision:
17:96a51b236ba0
Parent:
14:da09706b92f5 
Monitor both rising and falling edges

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kandangath 10:cb16d2957f8d 1 /**
kandangath 10:cb16d2957f8d 2 * DebouncedInterrupt.cpp
kandangath 10:cb16d2957f8d 3 **/
kandangath 10:cb16d2957f8d 4 #include "DebouncedInterrupt.h"
kandangath 0:ca5a0fee9f52 5
kandangath 0:ca5a0fee9f52 6 Timeout timeout;
kandangath 0:ca5a0fee9f52 7
kandangath 10:cb16d2957f8d 8 DebouncedInterrupt::DebouncedInterrupt(PinName pin)
kandangath 10:cb16d2957f8d 9 {
kandangath 10:cb16d2957f8d 10 _in = new InterruptIn(pin);
kandangath 14:da09706b92f5 11 _din = new DigitalIn(pin);
kandangath 10:cb16d2957f8d 12 }
kandangath 10:cb16d2957f8d 13
kandangath 10:cb16d2957f8d 14 DebouncedInterrupt::~DebouncedInterrupt()
kandangath 10:cb16d2957f8d 15 {
kandangath 14:da09706b92f5 16 delete _in;
kandangath 14:da09706b92f5 17 delete _din;
kandangath 10:cb16d2957f8d 18 }
kandangath 10:cb16d2957f8d 19
kandangath 17:96a51b236ba0 20 void DebouncedInterrupt::attach(void (*fptr)(void), const unsigned int& debounce_ms)
kandangath 0:ca5a0fee9f52 21 {
kandangath 10:cb16d2957f8d 22 if(fptr) {
kandangath 10:cb16d2957f8d 23 fCallback = fptr;
kandangath 13:09b53a088a9c 24 _last_bounce_count = _bounce_count = 0;
kandangath 17:96a51b236ba0 25 _debounce_us = 1000*debounce_ms;
kandangath 10:cb16d2957f8d 26
kandangath 17:96a51b236ba0 27 _in->rise(this, &DebouncedInterrupt::_onInterrupt);
kandangath 17:96a51b236ba0 28 _in->fall(this, &DebouncedInterrupt::_onInterrupt);
kandangath 0:ca5a0fee9f52 29 }
kandangath 0:ca5a0fee9f52 30 }
kandangath 0:ca5a0fee9f52 31
kandangath 10:cb16d2957f8d 32 void DebouncedInterrupt::reset()
kandangath 0:ca5a0fee9f52 33 {
kandangath 10:cb16d2957f8d 34 timeout.detach();
kandangath 0:ca5a0fee9f52 35 }
kandangath 0:ca5a0fee9f52 36
kandangath 13:09b53a088a9c 37 unsigned int DebouncedInterrupt::get_bounce()
kandangath 10:cb16d2957f8d 38 {
kandangath 13:09b53a088a9c 39 return _last_bounce_count;
kandangath 10:cb16d2957f8d 40 }
kandangath 10:cb16d2957f8d 41
kandangath 10:cb16d2957f8d 42 void DebouncedInterrupt::_callback()
kandangath 7:2d73e219dadf 43 {
kandangath 13:09b53a088a9c 44 _last_bounce_count = _bounce_count;
kandangath 13:09b53a088a9c 45 _bounce_count = 0;
kandangath 17:96a51b236ba0 46 if(_din->read()) {
kandangath 14:da09706b92f5 47 fCallback();
kandangath 14:da09706b92f5 48 }
kandangath 7:2d73e219dadf 49 }
kandangath 7:2d73e219dadf 50
kandangath 10:cb16d2957f8d 51 void DebouncedInterrupt::_onInterrupt()
kandangath 0:ca5a0fee9f52 52 {
kandangath 13:09b53a088a9c 53 _bounce_count++;
kandangath 10:cb16d2957f8d 54 timeout.attach_us(this, &DebouncedInterrupt::_callback, _debounce_us);
kandangath 7:2d73e219dadf 55 }