[cst226] Add support for cst226 binary sensor (#8381)

esphome/components/cst226/binary_sensor/__init__.py

@@ -0,0 +1,28 @@
+import esphome.codegen as cg
+from esphome.components import binary_sensor
+import esphome.config_validation as cv
+
+from .. import cst226_ns
+from ..touchscreen import CST226ButtonListener, CST226Touchscreen
+
+CONF_CST226_ID = "cst226_id"
+
+CST226Button = cst226_ns.class_(
+    "CST226Button",
+    binary_sensor.BinarySensor,
+    cg.Component,
+    CST226ButtonListener,
+    cg.Parented.template(CST226Touchscreen),
+)
+
+CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(CST226Button).extend(
+    {
+        cv.GenerateID(CONF_CST226_ID): cv.use_id(CST226Touchscreen),
+    }
+)
+
+
+async def to_code(config):
+    var = await binary_sensor.new_binary_sensor(config)
+    await cg.register_component(var, config)
+    await cg.register_parented(var, config[CONF_CST226_ID])

esphome/components/cst226/binary_sensor/cs226_button.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "esphome/components/binary_sensor/binary_sensor.h"
+#include "../touchscreen/cst226_touchscreen.h"
+#include "esphome/core/helpers.h"
+
+namespace esphome {
+namespace cst226 {
+
+class CST226Button : public binary_sensor::BinarySensor,
+                     public Component,
+                     public CST226ButtonListener,
+                     public Parented<CST226Touchscreen> {
+ public:
+  void setup() override;
+  void dump_config() override;
+
+  void update_button(bool state) override;
+};
+
+}  // namespace cst226
+}  // namespace esphome

esphome/components/cst226/binary_sensor/cstt6_button.cpp

@@ -0,0 +1,19 @@
+#include "cs226_button.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace cst226 {
+
+static const char *const TAG = "CST226.binary_sensor";
+
+void CST226Button::setup() {
+  this->parent_->register_button_listener(this);
+  this->publish_initial_state(false);
+}
+
+void CST226Button::dump_config() { LOG_BINARY_SENSOR("", "CST226 Button", this); }
+
+void CST226Button::update_button(bool state) { this->publish_state(state); }
+
+}  // namespace cst226
+}  // namespace esphome

esphome/components/cst226/touchscreen/cst226_touchscreen.cpp

@@ -3,8 +3,10 @@
 namespace esphome {
 namespace cst226 {
 
+static const char *const TAG = "cst226.touchscreen";
+
 void CST226Touchscreen::setup() {
-  esph_log_config(TAG, "Setting up CST226 Touchscreen...");
+  ESP_LOGCONFIG(TAG, "Setting up CST226 Touchscreen...");
   if (this->reset_pin_ != nullptr) {
     this->reset_pin_->setup();
     this->reset_pin_->digital_write(true);
@@ -26,6 +28,11 @@ void CST226Touchscreen::update_touches() {
     return;
   }
   this->status_clear_warning();
+  if (data[0] == 0x83 && data[1] == 0x17 && data[5] == 0x80) {
+    this->update_button_state_(true);
+    return;
+  }
+  this->update_button_state_(false);
   if (data[6] != 0xAB || data[0] == 0xAB || data[5] == 0x80) {
     this->skip_update_ = true;
     return;
@@ -43,13 +50,21 @@ void CST226Touchscreen::update_touches() {
     int16_t y = (data[index + 2] << 4) | (data[index + 3] & 0x0F);
     int16_t z = data[index + 4];
     this->add_raw_touch_position_(id, x, y, z);
-    esph_log_v(TAG, "Read touch %d: %d/%d", id, x, y);
+    ESP_LOGV(TAG, "Read touch %d: %d/%d", id, x, y);
     index += 5;
     if (i == 0)
       index += 2;
   }
 }
 
+bool CST226Touchscreen::read16_(uint16_t addr, uint8_t *data, size_t len) {
+  if (this->read_register16(addr, data, len) != i2c::ERROR_OK) {
+    ESP_LOGE(TAG, "Read data from 0x%04X failed", addr);
+    this->mark_failed();
+    return false;
+  }
+  return true;
+}
 void CST226Touchscreen::continue_setup_() {
   uint8_t buffer[8];
   if (this->interrupt_pin_ != nullptr) {
@@ -58,7 +73,7 @@ void CST226Touchscreen::continue_setup_() {
   }
   buffer[0] = 0xD1;
   if (this->write_register16(0xD1, buffer, 1) != i2c::ERROR_OK) {
-    esph_log_e(TAG, "Write byte to 0xD1 failed");
+    ESP_LOGE(TAG, "Write byte to 0xD1 failed");
     this->mark_failed();
     return;
   }
@@ -66,7 +81,7 @@ void CST226Touchscreen::continue_setup_() {
   if (this->read16_(0xD204, buffer, 4)) {
     uint16_t chip_id = buffer[2] + (buffer[3] << 8);
     uint16_t project_id = buffer[0] + (buffer[1] << 8);
-    esph_log_config(TAG, "Chip ID %X, project ID %x", chip_id, project_id);
+    ESP_LOGCONFIG(TAG, "Chip ID %X, project ID %x", chip_id, project_id);
   }
   if (this->x_raw_max_ == 0 || this->y_raw_max_ == 0) {
     if (this->read16_(0xD1F8, buffer, 4)) {
@@ -80,7 +95,14 @@ void CST226Touchscreen::continue_setup_() {
     }
   }
   this->setup_complete_ = true;
-  esph_log_config(TAG, "CST226 Touchscreen setup complete");
+  ESP_LOGCONFIG(TAG, "CST226 Touchscreen setup complete");
+}
+void CST226Touchscreen::update_button_state_(bool state) {
+  if (this->button_touched_ == state)
+    return;
+  this->button_touched_ = state;
+  for (auto *listener : this->button_listeners_)
+    listener->update_button(state);
 }
 
 void CST226Touchscreen::dump_config() {

esphome/components/cst226/touchscreen/cst226_touchscreen.h

@@ -9,10 +9,13 @@
 namespace esphome {
 namespace cst226 {
 
-static const char *const TAG = "cst226.touchscreen";
-
 static const uint8_t CST226_REG_STATUS = 0x00;
 
+class CST226ButtonListener {
+ public:
+  virtual void update_button(bool state) = 0;
+};
+
 class CST226Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice {
  public:
   void setup() override;
@@ -22,22 +25,19 @@ class CST226Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice
   void set_interrupt_pin(InternalGPIOPin *pin) { this->interrupt_pin_ = pin; }
   void set_reset_pin(GPIOPin *pin) { this->reset_pin_ = pin; }
   bool can_proceed() override { return this->setup_complete_ || this->is_failed(); }
+  void register_button_listener(CST226ButtonListener *listener) { this->button_listeners_.push_back(listener); }
 
  protected:
-  bool read16_(uint16_t addr, uint8_t *data, size_t len) {
+  bool read16_(uint16_t addr, uint8_t *data, size_t len);
-    if (this->read_register16(addr, data, len) != i2c::ERROR_OK) {
-      esph_log_e(TAG, "Read data from 0x%04X failed", addr);
-      this->mark_failed();
-      return false;
-    }
-    return true;
-  }
   void continue_setup_();
+  void update_button_state_(bool state);
 
   InternalGPIOPin *interrupt_pin_{};
   GPIOPin *reset_pin_{};
   uint8_t chip_id_{};
   bool setup_complete_{};
+  std::vector<CST226ButtonListener *> button_listeners_;
+  bool button_touched_{};
 };
 
 }  // namespace cst226

tests/components/cst226/common.yaml

@@ -23,3 +23,9 @@ touchscreen:
     interrupt_pin: ${interrupt_pin}
     reset_pin: ${reset_pin}
 
+binary_sensor:
+  - id: cst226_touch
+    platform: cst226
+    on_press:
+      then:
+        - component.update: ts_cst226