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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "relative_wheel.hpp"
#include <stdint.h>
#include <cstdint>
#include "esp_log.h"
namespace drivers {
RelativeWheel::RelativeWheel(TouchWheel* touch)
: touch_(touch),
is_clicking_(false),
was_clicking_(false),
is_first_read_(true),
ticks_(0),
last_angle_(0) {}
auto RelativeWheel::Update() -> void {
touch_->Update();
TouchWheelData d = touch_->GetTouchWheelData();
is_clicking_ = d.is_button_touched;
if (is_clicking_) {
ticks_ = 0;
return;
}
if (!d.is_wheel_touched) {
ticks_ = 0;
is_first_read_ = true;
return;
}
uint8_t new_angle = d.wheel_position;
if (is_first_read_) {
is_first_read_ = false;
last_angle_ = new_angle;
return;
}
int delta = 128 - last_angle_;
uint8_t rotated_angle = new_angle + delta;
int threshold = 20;
if (rotated_angle < 128 - threshold) {
ticks_ = 1;
last_angle_ = new_angle;
} else if (rotated_angle > 128 + threshold) {
ticks_ = -1;
last_angle_ = new_angle;
} else {
ticks_ = 0;
}
}
auto RelativeWheel::is_clicking() -> bool {
bool ret = is_clicking_;
is_clicking_ = 0;
return ret;
}
auto RelativeWheel::ticks() -> std::int_fast16_t {
int_fast16_t t = ticks_;
if (t != 0) {
ESP_LOGI("teeks", "ticks %d", t);
}
ticks_ = 0;
return t;
}
} // namespace drivers
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