mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 11:44:31 +00:00
06b7a0419e
* Resolve button responsiveness * Resolve button responsiveness * Clang * Clang * Clang try again * Removed unnecessary lines * Address review comments * Add comments per reviewer suggestion * Clang test * Clang retry
152 lines
5.1 KiB
C++
152 lines
5.1 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2023 Mark Thompson
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "debounce.hpp"
|
|
|
|
#include "utility.hpp"
|
|
|
|
uint8_t Debounce::state() {
|
|
bool v = state_to_report_;
|
|
simulated_pulse_ = false;
|
|
return v;
|
|
}
|
|
|
|
void Debounce::enable_repeat() {
|
|
repeat_enabled_ = true;
|
|
}
|
|
|
|
bool Debounce::get_long_press_enabled() const {
|
|
return long_press_enabled_;
|
|
}
|
|
|
|
void Debounce::set_long_press_enabled(bool v) {
|
|
long_press_enabled_ = v;
|
|
}
|
|
|
|
bool Debounce::long_press_occurred() {
|
|
bool v = long_press_occurred_;
|
|
long_press_occurred_ = false;
|
|
return v;
|
|
}
|
|
|
|
// Returns TRUE if button state changed (after debouncing)
|
|
bool Debounce::feed(const uint8_t bit) {
|
|
history_ = (history_ << 1) | (bit & 1);
|
|
|
|
// Has button been held for DEBOUNCE_COUNT ticks?
|
|
if ((history_ & DEBOUNCE_MASK) == DEBOUNCE_MASK) {
|
|
//
|
|
// Button is currently pressed;
|
|
// Was previous button state 0 (released)?
|
|
//
|
|
if (state_ == 0) {
|
|
//
|
|
// Button has been pressed (after filtering glitches), transition 0->1
|
|
//
|
|
state_ = 1;
|
|
|
|
// If long_press_enabled_, state() function masks the button press until it's released
|
|
// or until LONG_PRESS_DELAY is reached
|
|
if (long_press_enabled_) {
|
|
pulse_upon_release_ = true;
|
|
state_to_report_ = 0;
|
|
return false;
|
|
}
|
|
state_to_report_ = 1;
|
|
return true;
|
|
}
|
|
|
|
// "Repeat" handling - simulated button release
|
|
if (repeat_ctr_ && !long_press_enabled_) {
|
|
// Simulate button press every REPEAT_SUBSEQUENT_DELAY ticks
|
|
// (by toggling reported state every 1/2 of the delay time)
|
|
if (--repeat_ctr_ == 0) {
|
|
state_to_report_ = !state_to_report_;
|
|
repeat_ctr_ = REPEAT_SUBSEQUENT_DELAY / 2;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Keep track of how long button has been held
|
|
held_time_++;
|
|
if (pulse_upon_release_) {
|
|
// Button is being held down and long_press support is enabled for this key:
|
|
// if LONG_PRESS_DELAY is reached then finally report that switch is pressed and set flag
|
|
// indicating it was a LONG press
|
|
// (note that repeat_support and long_press support are mutually exclusive)
|
|
if (held_time_ >= LONG_PRESS_DELAY) {
|
|
pulse_upon_release_ = false;
|
|
long_press_occurred_ = true;
|
|
state_to_report_ = 1;
|
|
return true;
|
|
}
|
|
} else if (repeat_enabled_ && !long_press_enabled_) {
|
|
// Repeat support -- 4 directional buttons only (unless long_press is enabled)
|
|
if (held_time_ >= REPEAT_INITIAL_DELAY) {
|
|
// Delay reached; trigger repeat code on NEXT tick
|
|
repeat_ctr_ = 1;
|
|
held_time_ = 0;
|
|
}
|
|
}
|
|
} else if ((history_ & DEBOUNCE_MASK) == 0) { // Has button been released for at least DEBOUNCE_COUNT ticks?
|
|
//
|
|
// Button is released;
|
|
// Was previous button state 1 (pressed)?
|
|
//
|
|
if (state_ == 1) {
|
|
//
|
|
// Button has been released (after filtering glitches), transition 1->0
|
|
//
|
|
state_ = 0;
|
|
long_press_occurred_ = false;
|
|
|
|
// If button released when long_press_enabled_ and before LONG_PRESS_DELAY was reached;
|
|
// allow state() function to finally return a single press indication (simulated pulse).
|
|
// Note: In long press mode, apps won't see button press until the button is released.
|
|
if (pulse_upon_release_) {
|
|
pulse_upon_release_ = false;
|
|
simulated_pulse_ = true;
|
|
state_to_report_ = 1;
|
|
return true;
|
|
}
|
|
|
|
state_to_report_ = 0;
|
|
return true;
|
|
}
|
|
|
|
// Reset reported state after application/event has cleared simulated_pulse_
|
|
if (state_to_report_ == 1 && !simulated_pulse_) {
|
|
state_to_report_ = 0;
|
|
return true;
|
|
}
|
|
} else {
|
|
//
|
|
// Button is in transition between states;
|
|
// Reset counters until button inputs are stable.
|
|
//
|
|
held_time_ = 0;
|
|
repeat_ctr_ = 0;
|
|
}
|
|
|
|
return false;
|
|
}
|