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Merge pull request #945 from bernd-herzog/touchscreen_multiinput_fix

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fixed touch handling issue causing multiple inputs
This commit is contained in:
gullradriel 2023-05-03 11:43:34 +02:00 committed by GitHub
commit 91675e26cb
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2 changed files with 11 additions and 7 deletions
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17
firmware/application/touch.cpp
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@ -81,16 +81,21 @@ void Manager::feed(const Frame& frame) {
const auto touch_raw = frame.touch;
//const auto touch_stable = touch_debounce.state();
const auto touch_stable = frame.touch;
bool touch_pressure = false;
bool touch_down_pressure = false;
bool touch_up_pressure = false;
// Only feed coordinate averaging if there's a touch.
// TODO: Separate threshold to gate coordinates for filtering?
if( touch_raw ) {
const auto metrics = calculate_metrics(frame);
// TODO: Add touch pressure hysteresis?
touch_pressure = (metrics.r < r_touch_threshold);
if( touch_pressure ) {
constexpr float r_touch_down_threshold = 3200.0f;
constexpr float r_touch_up_threshold = r_touch_down_threshold * 2.0f;
touch_down_pressure = (metrics.r < r_touch_down_threshold);
touch_up_pressure = (metrics.r < r_touch_up_threshold);
if( touch_down_pressure ) {
filter_x.feed(metrics.x * 1024);
filter_y.feed(metrics.y * 1024);
}
@ -101,7 +106,7 @@ void Manager::feed(const Frame& frame) {
switch(state) {
case State::NoTouch:
if( touch_stable && touch_pressure && !persistent_memory::disable_touchscreen()) {
if( touch_stable && touch_down_pressure && !persistent_memory::disable_touchscreen()) {
if( point_stable() ) {
state = State::TouchDetected;
touch_started();
@ -110,7 +115,7 @@ void Manager::feed(const Frame& frame) {
break;
case State::TouchDetected:
if( touch_stable && touch_pressure ) {
if( touch_stable && touch_up_pressure ) {
touch_moved();
} else {
state = State::NoTouch;

1
firmware/application/touch.hpp
View File

@ -219,7 +219,6 @@ private:
TouchDetected,
};
static constexpr float r_touch_threshold = 640;
static constexpr size_t touch_count_threshold { 3 };
static constexpr uint32_t touch_stable_bound { 8 };