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/* Copyright (c) <2016> <MultiTech Systems>, MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ButtonHandler.h"
#define signal (int32_t)0xA0
typedef enum {
b_none = 0,
b_sw1_fall,
b_sw1_rise,
b_sw2_fall,
b_sw2_rise
} InternalButtonEvent;
InternalButtonEvent event = b_none;
bool check_sw1 = false;
void b_worker(void const* argument) {
ButtonHandler* b = (ButtonHandler*)argument;
osEvent e;
while (true) {
e = Thread::signal_wait(signal, 250);
if (e.status == osEventSignal) {
switch (event) {
case b_sw1_fall:
if (! b->_sw1_running) {
check_sw1 = true;
b->_sw1_running = true;
b->_sw1_timer.reset();
b->_sw1_timer.start();
}
break;
case b_sw1_rise:
if (b->_sw1_running) {
check_sw1 = false;
b->_sw1_running = false;
b->_sw1_timer.stop();
b->_sw1_time = b->_sw1_timer.read_ms();
if (b->_sw1_time > b->_debounce_time) {
b->_event = ButtonHandler::sw1_press;
osSignalSet(b->_main, buttonSignal);
}
}
break;
case b_sw2_fall:
if (! b->_sw2_running) {
b->_sw2_running = true;
b->_sw2_timer.reset();
b->_sw2_timer.start();
}
break;
case b_sw2_rise:
if (b->_sw2_running) {
b->_sw2_running = false;
b->_sw2_timer.stop();
b->_sw2_time = b->_sw2_timer.read_ms();
if (b->_sw2_time > b->_debounce_time) {
b->_event = ButtonHandler::sw2_press;
osSignalSet(b->_main, buttonSignal);
}
}
break;
default:
break;
}
}
if (check_sw1) {
if (b->_sw1_timer.read_ms() > b->_hold_threshold) {
check_sw1 = false;
b->_sw1_running = false;
b->_sw1_timer.stop();
b->_event = ButtonHandler::sw1_hold;
osSignalSet(b->_main, buttonSignal);
}
}
}
}
ButtonHandler::ButtonHandler(osThreadId main)
: _main(main),
_thread(b_worker, (void*)this),
_sw1(PA_12),
_sw2(PA_11),
_sw1_time(0),
_sw2_time(0),
_sw1_running(false),
_sw2_running(false),
_event(none),
_debounce_time(20),
_hold_threshold(500)
{
// fall handler called on press, rise handler called on release
_sw1.fall(this, &ButtonHandler::sw1_fall);
_sw1.rise(this, &ButtonHandler::sw1_rise);
// need to set mode to PullUp after attaching handlers - default is PullNone (see PinNames.h)
_sw1.mode(PullUp);
_sw2.fall(this, &ButtonHandler::sw2_fall);
_sw2.rise(this, &ButtonHandler::sw2_rise);
_sw2.mode(PullUp);
}
ButtonHandler::ButtonEvent ButtonHandler::getButtonEvent() {
ButtonEvent event = _event;
_event = none;
return event;
}
void ButtonHandler::sw1_fall() {
event = b_sw1_fall;
_thread.signal_set(signal);
_thread.signal_clr(signal);
}
void ButtonHandler::sw1_rise() {
event = b_sw1_rise;
_thread.signal_set(signal);
_thread.signal_clr(signal);
}
void ButtonHandler::sw2_fall() {
event = b_sw2_fall;
_thread.signal_set(signal);
_thread.signal_clr(signal);
}
void ButtonHandler::sw2_rise() {
event = b_sw2_rise;
_thread.signal_set(signal);
_thread.signal_clr(signal);
}
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