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GT911 touchscreen: Fix bug causing touch button release to fail (#6042) 

* Fix bug causing gt911 touch button release to fail

* Cache button state and report changes only
This commit is contained in:
Clyde Stubbs 2023-12-31 21:01:16 +11:00 committed by GitHub
parent 2a43e55452
commit 773cd0f414
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 9 additions and 7 deletions
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15
esphome/components/gt911/touchscreen/gt911_touchscreen.cpp
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@ -14,6 +14,7 @@ static const uint8_t GET_TOUCHES[2] = {0x81, 0x4F};
static const uint8_t GET_SWITCHES[2] = {0x80, 0x4D};
static const uint8_t GET_MAX_VALUES[2] = {0x80, 0x48};
static const size_t MAX_TOUCHES = 5; // max number of possible touches reported
static const size_t MAX_BUTTONS = 4; // max number of buttons scanned
#define ERROR_CHECK(err) \
if ((err) != i2c::ERROR_OK) { \
@ -79,9 +80,6 @@ void GT911Touchscreen::update_touches() {
return;
}
if (num_of_touches == 0)
return;
err = this->write(GET_TOUCHES, sizeof(GET_TOUCHES), false);
ERROR_CHECK(err);
// num_of_touches is guaranteed to be 0..5. Also read the key data
@ -94,10 +92,13 @@ void GT911Touchscreen::update_touches() {
uint16_t y = encode_uint16(data[i][4], data[i][3]);
this->add_raw_touch_position_(id, x, y);
}
auto keys = data[num_of_touches][0];
for (size_t i = 0; i != 4; i++) {
for (auto *listener : this->button_listeners_)
listener->update_button(i, (keys & (1 << i)) != 0);
auto keys = data[num_of_touches][0] & ((1 << MAX_BUTTONS) - 1);
if (keys != this->button_state_) {
this->button_state_ = keys;
for (size_t i = 0; i != MAX_BUTTONS; i++) {
for (auto *listener : this->button_listeners_)
listener->update_button(i, (keys & (1 << i)) != 0);
}
}
}

1
esphome/components/gt911/touchscreen/gt911_touchscreen.h
View File

@ -26,6 +26,7 @@ class GT911Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice
InternalGPIOPin *interrupt_pin_{};
std::vector<GT911ButtonListener *> button_listeners_;
uint8_t button_state_{0xFF}; // last button state. Initial FF guarantees first update.
};
} // namespace gt911