Debounce InterruptIn
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DebouncedInterrupt.cpp@14:da09706b92f5, 2014-02-18 (annotated)
- Committer:
- kandangath
- Date:
- Tue Feb 18 17:26:42 2014 +0000
- Revision:
- 14:da09706b92f5
- Parent:
- 13:09b53a088a9c
- Child:
- 17:96a51b236ba0
Also poll pin value at the end of the debounce period
Who changed what in which revision?
User | Revision | Line number | New 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 | 10:cb16d2957f8d | 20 | void DebouncedInterrupt::attach(void (*fptr)(void), |
kandangath | 4:19689187352e | 21 | const interruptTrigger& trigger, |
kandangath | 0:ca5a0fee9f52 | 22 | const unsigned int& debounce_ms) |
kandangath | 0:ca5a0fee9f52 | 23 | { |
kandangath | 10:cb16d2957f8d | 24 | if(fptr) { |
kandangath | 10:cb16d2957f8d | 25 | fCallback = fptr; |
kandangath | 13:09b53a088a9c | 26 | _last_bounce_count = _bounce_count = 0; |
kandangath | 10:cb16d2957f8d | 27 | |
kandangath | 10:cb16d2957f8d | 28 | switch(trigger) { |
kandangath | 10:cb16d2957f8d | 29 | case INT_RISE: |
kandangath | 10:cb16d2957f8d | 30 | _in->rise(this, &DebouncedInterrupt::_onInterrupt); |
kandangath | 10:cb16d2957f8d | 31 | break; |
kandangath | 10:cb16d2957f8d | 32 | case INT_FALL: |
kandangath | 10:cb16d2957f8d | 33 | _in->fall(this, &DebouncedInterrupt::_onInterrupt); |
kandangath | 10:cb16d2957f8d | 34 | break; |
kandangath | 10:cb16d2957f8d | 35 | default: |
kandangath | 10:cb16d2957f8d | 36 | break; |
kandangath | 10:cb16d2957f8d | 37 | } |
kandangath | 4:19689187352e | 38 | |
kandangath | 10:cb16d2957f8d | 39 | _debounce_us = 1000*debounce_ms; |
kandangath | 0:ca5a0fee9f52 | 40 | } |
kandangath | 0:ca5a0fee9f52 | 41 | } |
kandangath | 0:ca5a0fee9f52 | 42 | |
kandangath | 10:cb16d2957f8d | 43 | void DebouncedInterrupt::reset() |
kandangath | 0:ca5a0fee9f52 | 44 | { |
kandangath | 10:cb16d2957f8d | 45 | timeout.detach(); |
kandangath | 0:ca5a0fee9f52 | 46 | } |
kandangath | 0:ca5a0fee9f52 | 47 | |
kandangath | 13:09b53a088a9c | 48 | unsigned int DebouncedInterrupt::get_bounce() |
kandangath | 10:cb16d2957f8d | 49 | { |
kandangath | 13:09b53a088a9c | 50 | return _last_bounce_count; |
kandangath | 10:cb16d2957f8d | 51 | } |
kandangath | 10:cb16d2957f8d | 52 | |
kandangath | 10:cb16d2957f8d | 53 | void DebouncedInterrupt::_callback() |
kandangath | 7:2d73e219dadf | 54 | { |
kandangath | 13:09b53a088a9c | 55 | _last_bounce_count = _bounce_count; |
kandangath | 13:09b53a088a9c | 56 | _bounce_count = 0; |
kandangath | 14:da09706b92f5 | 57 | if(_din) { |
kandangath | 14:da09706b92f5 | 58 | fCallback(); |
kandangath | 14:da09706b92f5 | 59 | } |
kandangath | 7:2d73e219dadf | 60 | } |
kandangath | 7:2d73e219dadf | 61 | |
kandangath | 10:cb16d2957f8d | 62 | void DebouncedInterrupt::_onInterrupt() |
kandangath | 0:ca5a0fee9f52 | 63 | { |
kandangath | 13:09b53a088a9c | 64 | _bounce_count++; |
kandangath | 10:cb16d2957f8d | 65 | timeout.attach_us(this, &DebouncedInterrupt::_callback, _debounce_us); |
kandangath | 7:2d73e219dadf | 66 | } |
kandangath | 7:2d73e219dadf | 67 |