145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
#include "tt21100.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace tt21100 {
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static const char *const TAG = "tt21100";
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static const uint8_t MAX_BUTTONS = 4;
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static const uint8_t MAX_TOUCH_POINTS = 5;
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static const uint8_t MAX_DATA_LEN = (7 + MAX_TOUCH_POINTS * 10); // 7 Header + (Points * 10 data bytes)
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struct TT21100ButtonReport {
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uint16_t length; // Always 14 (0x000E)
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uint8_t report_id; // Always 0x03
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uint16_t timestamp; // Number in units of 100 us
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uint8_t btn_value; // Only use bit 0..3
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uint16_t btn_signal[MAX_BUTTONS];
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} __attribute__((packed));
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struct TT21100TouchRecord {
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uint8_t : 5;
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uint8_t touch_type : 3;
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uint8_t tip : 1;
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uint8_t event_id : 2;
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uint8_t touch_id : 5;
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uint16_t x;
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uint16_t y;
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uint8_t pressure;
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uint16_t major_axis_length;
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uint8_t orientation;
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} __attribute__((packed));
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struct TT21100TouchReport {
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uint16_t length;
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uint8_t report_id;
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uint16_t timestamp;
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uint8_t : 2;
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uint8_t large_object : 1;
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uint8_t record_num : 5;
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uint8_t report_counter : 2;
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uint8_t : 3;
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uint8_t noise_effect : 3;
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TT21100TouchRecord touch_record[MAX_TOUCH_POINTS];
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} __attribute__((packed));
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float TT21100Touchscreen::get_setup_priority() const { return setup_priority::HARDWARE - 1.0f; }
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void TT21100Touchscreen::setup() {
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ESP_LOGCONFIG(TAG, "Running setup");
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// Register interrupt pin
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if (this->interrupt_pin_ != nullptr) {
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this->interrupt_pin_->pin_mode(gpio::FLAG_INPUT | gpio::FLAG_PULLUP);
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this->interrupt_pin_->setup();
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this->attach_interrupt_(this->interrupt_pin_, gpio::INTERRUPT_FALLING_EDGE);
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}
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// Perform reset if necessary
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if (this->reset_pin_ != nullptr) {
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this->reset_pin_->setup();
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this->reset_();
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}
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// Update display dimensions if they were updated during display setup
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if (this->display_ != nullptr) {
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if (this->x_raw_max_ == this->x_raw_min_) {
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this->x_raw_max_ = this->display_->get_native_width();
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}
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if (this->y_raw_max_ == this->y_raw_min_) {
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this->y_raw_max_ = this->display_->get_native_height();
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}
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}
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// Trigger initial read to activate the interrupt
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this->store_.touched = true;
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}
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void TT21100Touchscreen::update_touches() {
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// Read report length
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uint16_t data_len;
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this->read((uint8_t *) &data_len, sizeof(data_len));
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// Read report data
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uint8_t data[MAX_DATA_LEN];
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if (data_len > 0 && data_len < sizeof(data)) {
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this->read(data, data_len);
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if (data_len == 14) {
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// Button event
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auto *report = (TT21100ButtonReport *) data;
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ESP_LOGV(TAG, "Button report: Len=%d, ID=%d, Time=%5u, Value=[%u], Signal=[%04X][%04X][%04X][%04X]",
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report->length, report->report_id, report->timestamp, report->btn_value, report->btn_signal[0],
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report->btn_signal[1], report->btn_signal[2], report->btn_signal[3]);
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for (uint8_t i = 0; i < 4; i++) {
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for (auto *listener : this->button_listeners_)
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listener->update_button(i, report->btn_signal[i]);
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}
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} else if (data_len >= 7) {
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// Touch point event
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auto *report = (TT21100TouchReport *) data;
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ESP_LOGV(TAG,
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"Touch report: Len=%d, ID=%d, Time=%5u, LargeObject=%u, RecordNum=%u, RecordCounter=%u, NoiseEffect=%u",
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report->length, report->report_id, report->timestamp, report->large_object, report->record_num,
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report->report_counter, report->noise_effect);
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uint8_t touch_count = (data_len - (sizeof(*report) - sizeof(report->touch_record))) / sizeof(TT21100TouchRecord);
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for (int i = 0; i < touch_count; i++) {
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auto *touch = &report->touch_record[i];
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ESP_LOGV(TAG,
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"Touch %d: Type=%u, Tip=%u, EventId=%u, TouchId=%u, X=%u, Y=%u, Pressure=%u, MajorAxisLen=%u, "
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"Orientation=%u",
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i, touch->touch_type, touch->tip, touch->event_id, touch->touch_id, touch->x, touch->y,
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touch->pressure, touch->major_axis_length, touch->orientation);
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this->add_raw_touch_position_(touch->tip, touch->x, touch->y, touch->pressure);
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}
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}
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}
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}
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void TT21100Touchscreen::reset_() {
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if (this->reset_pin_ != nullptr) {
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this->reset_pin_->digital_write(false);
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delay(10);
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this->reset_pin_->digital_write(true);
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delay(10);
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}
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}
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void TT21100Touchscreen::dump_config() {
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ESP_LOGCONFIG(TAG, "TT21100 Touchscreen:");
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LOG_I2C_DEVICE(this);
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LOG_PIN(" Interrupt Pin: ", this->interrupt_pin_);
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LOG_PIN(" Reset Pin: ", this->reset_pin_);
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}
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} // namespace tt21100
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} // namespace esphome
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