band/tinyfinger
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add state machines for recognizing different button presses

Browse Source 
For now single, double and long presses are supported.
This commit is contained in:
Klemens Schölhorn 2017-11-17 17:55:32 +01:00
parent 04d45ec03e
commit 39fc93059d
3 changed files with 133 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
code/button.h Normal file
View File

@ -0,0 +1,81 @@
#include "debounce.h"
template<uint16_t SLEEP_TIMEOUT, uint16_t LONGPRESS_TIMEOUT, uint16_t DOUBLEPRESS_TIMEOUT>
class Button {
using DResult = Debounce<0>::Result;
public:
enum class State : uint8_t {
Sleep,
Idle,
Pressed,
LongPressed,
Released,
DoublePressed,
};
enum class Result : uint8_t {
NoEvent,
Press,
LongPress,
DoublePress,
};
Result event(DResult result) {
switch(state) {
case State::Sleep :
state = State::Idle;
counter = millis();
break;
case State::Idle :
if(result == DResult::Pressed) {
state = State::Pressed;
counter = millis();
} else if(millis() - counter >= SLEEP_TIMEOUT) {
state = State::Sleep;
// Activate Hardware sleep
}
break;
case State::Pressed :
if(result == DResult::Released) {
state = State::Released;
counter = millis();
} else if(millis() - counter >= LONGPRESS_TIMEOUT) {
state = State::LongPressed;
return Result::LongPress;
}
break;
case State::Released :
if(result == DResult::Pressed) {
state = State::DoublePressed;
} else if(millis() - counter >= DOUBLEPRESS_TIMEOUT) {
state = State::Idle;
counter = millis();
return Result::Press;
}
break;
case State::LongPressed :
if(result == DResult::Released) {
state = State::Idle;
counter = millis();
} else {
return Result::LongPress;
}
break;
case State::DoublePressed :
if(result == DResult::Released) {
state = State::Idle;
counter = millis();
return Result::DoublePress;
}
break;
}
return Result::NoEvent;
}
private:
State state = State::Idle;
uint16_t counter = 0;
};

1
code/code.ino
View File

@ -2,6 +2,7 @@
#undef min
#undef max
#include "button.h"
#include "debounce.h"
#include "lcg_rng.h"
#include "segment.h"

57
code/debounce.h
View File

@ -1,12 +1,57 @@
enum class State : uint8_t {
Unpressed,
UnpressedDebounced,
Pressed,
PressedDebounced,
};
#ifndef _DEBOUNCE_H_
#define _DEBOUNCE_H_
template<uint8_t DEBOUNCE_PRESSED, uint8_t DEBOUNCE_UNPRESSED = DEBOUNCE_PRESSED>
class Debounce {
public:
enum class State : uint8_t {
Unpressed,
UnpressedDebounced,
Pressed,
PressedDebounced,
};
enum class Result : uint8_t {
NoEvent,
Pressed,
Released,
};
Result event(bool pressed) {
switch(state) {
case State::Unpressed :
if(pressed) {
state = State::PressedDebounced;
counter = millis();
return Result::Pressed;
}
break;
case State::PressedDebounced :
if(millis() - counter > DEBOUNCE_PRESSED) {
state = State::Pressed;
}
break;
case State::Pressed :
if(!pressed) {
state = State::UnpressedDebounced;
counter = millis();
return Result::Released;
}
break;
case State::UnpressedDebounced :
if(millis() - counter > DEBOUNCE_UNPRESSED) {
state = State::Unpressed;
}
break;
}
return Result::NoEvent;
}
private:
State state = State::Unpressed;
uint8_t counter = 0;
};
#endif