ESPHome  2024.5.4
tt21100.cpp
Go to the documentation of this file.
1 #include "tt21100.h"
2 #include "esphome/core/log.h"
3 
4 namespace esphome {
5 namespace tt21100 {
6 
7 static const char *const TAG = "tt21100";
8 
9 static const uint8_t MAX_BUTTONS = 4;
10 static const uint8_t MAX_TOUCH_POINTS = 5;
11 static const uint8_t MAX_DATA_LEN = (7 + MAX_TOUCH_POINTS * 10); // 7 Header + (Points * 10 data bytes)
12 
13 struct TT21100ButtonReport {
14  uint16_t length; // Always 14 (0x000E)
15  uint8_t report_id; // Always 0x03
16  uint16_t timestamp; // Number in units of 100 us
17  uint8_t btn_value; // Only use bit 0..3
18  uint16_t btn_signal[MAX_BUTTONS];
19 } __attribute__((packed));
20 
21 struct TT21100TouchRecord {
22  uint8_t : 5;
23  uint8_t touch_type : 3;
24  uint8_t tip : 1;
25  uint8_t event_id : 2;
26  uint8_t touch_id : 5;
27  uint16_t x;
28  uint16_t y;
29  uint8_t pressure;
30  uint16_t major_axis_length;
31  uint8_t orientation;
32 } __attribute__((packed));
33 
34 struct TT21100TouchReport {
35  uint16_t length;
36  uint8_t report_id;
37  uint16_t timestamp;
38  uint8_t : 2;
39  uint8_t large_object : 1;
40  uint8_t record_num : 5;
41  uint8_t report_counter : 2;
42  uint8_t : 3;
43  uint8_t noise_effect : 3;
44  TT21100TouchRecord touch_record[MAX_TOUCH_POINTS];
45 } __attribute__((packed));
46 
48 
50  ESP_LOGCONFIG(TAG, "Setting up TT21100 Touchscreen...");
51 
52  // Register interrupt pin
53  if (this->interrupt_pin_ != nullptr) {
54  this->interrupt_pin_->pin_mode(gpio::FLAG_INPUT | gpio::FLAG_PULLUP);
55  this->interrupt_pin_->setup();
56  this->attach_interrupt_(this->interrupt_pin_, gpio::INTERRUPT_FALLING_EDGE);
57  }
58 
59  // Perform reset if necessary
60  if (this->reset_pin_ != nullptr) {
61  this->reset_pin_->setup();
62  this->reset_();
63  }
64 
65  // Update display dimensions if they were updated during display setup
66  if (this->display_ != nullptr) {
67  if (this->x_raw_max_ == this->x_raw_min_) {
68  this->x_raw_max_ = this->display_->get_native_width();
69  }
70  if (this->y_raw_max_ == this->y_raw_min_) {
71  this->x_raw_max_ = this->display_->get_native_height();
72  }
73  }
74 
75  // Trigger initial read to activate the interrupt
76  this->store_.touched = true;
77 }
78 
80  // Read report length
81  uint16_t data_len;
82  this->read((uint8_t *) &data_len, sizeof(data_len));
83 
84  // Read report data
85  uint8_t data[MAX_DATA_LEN];
86  if (data_len > 0 && data_len < sizeof(data)) {
87  this->read(data, data_len);
88 
89  if (data_len == 14) {
90  // Button event
91  auto *report = (TT21100ButtonReport *) data;
92 
93  ESP_LOGV(TAG, "Button report: Len=%d, ID=%d, Time=%5u, Value=[%u], Signal=[%04X][%04X][%04X][%04X]",
94  report->length, report->report_id, report->timestamp, report->btn_value, report->btn_signal[0],
95  report->btn_signal[1], report->btn_signal[2], report->btn_signal[3]);
96 
97  for (uint8_t i = 0; i < 4; i++) {
98  for (auto *listener : this->button_listeners_)
99  listener->update_button(i, report->btn_signal[i]);
100  }
101 
102  } else if (data_len >= 7) {
103  // Touch point event
104  auto *report = (TT21100TouchReport *) data;
105 
106  ESP_LOGV(TAG,
107  "Touch report: Len=%d, ID=%d, Time=%5u, LargeObject=%u, RecordNum=%u, RecordCounter=%u, NoiseEffect=%u",
108  report->length, report->report_id, report->timestamp, report->large_object, report->record_num,
109  report->report_counter, report->noise_effect);
110 
111  uint8_t touch_count = (data_len - (sizeof(*report) - sizeof(report->touch_record))) / sizeof(TT21100TouchRecord);
112 
113  for (int i = 0; i < touch_count; i++) {
114  auto *touch = &report->touch_record[i];
115 
116  ESP_LOGV(TAG,
117  "Touch %d: Type=%u, Tip=%u, EventId=%u, TouchId=%u, X=%u, Y=%u, Pressure=%u, MajorAxisLen=%u, "
118  "Orientation=%u",
119  i, touch->touch_type, touch->tip, touch->event_id, touch->touch_id, touch->x, touch->y,
120  touch->pressure, touch->major_axis_length, touch->orientation);
121 
122  this->add_raw_touch_position_(touch->tip, touch->x, touch->y, touch->pressure);
123  }
124  }
125  }
126 }
127 
129  if (this->reset_pin_ != nullptr) {
130  this->reset_pin_->digital_write(false);
131  delay(10);
132  this->reset_pin_->digital_write(true);
133  delay(10);
134  }
135 }
136 
138  ESP_LOGCONFIG(TAG, "TT21100 Touchscreen:");
139  LOG_I2C_DEVICE(this);
140  LOG_PIN(" Interrupt Pin: ", this->interrupt_pin_);
141  LOG_PIN(" Reset Pin: ", this->reset_pin_);
142 }
143 
144 } // namespace tt21100
145 } // namespace esphome
uint8_t touch_id
Definition: tt21100.cpp:16
uint8_t tip
Definition: tt21100.cpp:14
uint8_t pressure
Definition: tt21100.cpp:19
uint16_t x
Definition: tt21100.cpp:17
uint8_t orientation
Definition: tt21100.cpp:21
class esphome::tt21100::TT21100ButtonListener __attribute__
uint16_t btn_signal[MAX_BUTTONS]
Definition: tt21100.cpp:16
uint8_t btn_value
Definition: tt21100.cpp:15
uint16_t y
Definition: tt21100.cpp:18
uint16_t major_axis_length
Definition: tt21100.cpp:20
const char *const TAG
Definition: spi.cpp:8
uint8_t noise_effect
Definition: tt21100.cpp:20
uint16_t timestamp
Definition: tt21100.cpp:14
uint8_t record_num
Definition: tt21100.cpp:17
float get_setup_priority() const override
Definition: tt21100.cpp:47
uint8_t touch_type
Definition: tt21100.cpp:13
TT21100TouchRecord touch_record[MAX_TOUCH_POINTS]
Definition: tt21100.cpp:21
const float HARDWARE
For components that deal with hardware and are very important like GPIO switch.
Definition: component.cpp:18
uint8_t report_counter
Definition: tt21100.cpp:18
uint8_t report_id
Definition: tt21100.cpp:13
uint16_t length
Definition: tt21100.cpp:12
This is a workaround until we can figure out a way to get the tflite-micro idf component code availab...
Definition: a01nyub.cpp:7
uint8_t event_id
Definition: tt21100.cpp:15
uint8_t large_object
Definition: tt21100.cpp:16
void IRAM_ATTR HOT delay(uint32_t ms)
Definition: core.cpp:26