text: #include "pcf8574.h"
  #include "esphome/core/log.h"
  
  namespace esphome {
  namespace pcf8574 {
  
  static const char *TAG = "pcf8574";
  
  void PCF8574Component::setup() {
    ESP_LOGCONFIG(TAG, "Setting up PCF8574...");
    if (!this->read_gpio_()) {
      ESP_LOGE(TAG, "PCF8574 not available under 0x%02X", this->address_);
      this->mark_failed();
      return;
    }
  
    this->write_gpio_();
    this->read_gpio_();
  }
  void PCF8574Component::dump_config() {
    ESP_LOGCONFIG(TAG, "PCF8574:");
    LOG_I2C_DEVICE(this)
    ESP_LOGCONFIG(TAG, "  Is PCF8575: %s", YESNO(this->pcf8575_));
    if (this->is_failed()) {
      ESP_LOGE(TAG, "Communication with PCF8574 failed!");
    }
  }
  bool PCF8574Component::digital_read(uint8_t pin) {
    this->read_gpio_();
    return this->input_mask_ & (1 << pin);
  }
  void PCF8574Component::digital_write(uint8_t pin, bool value) {
    if (value) {
      this->port_mask_ |= (1 << pin);
    } else {
      this->port_mask_ &= ~(1 << pin);
    }
  
    this->write_gpio_();
  }
  void PCF8574Component::pin_mode(uint8_t pin, uint8_t mode) {
    switch (mode) {
      case PCF8574_INPUT:
        this->ddr_mask_ &= ~(1 << pin);
        this->port_mask_ &= ~(1 << pin);
        break;
      case PCF8574_INPUT_PULLUP:
        this->ddr_mask_ &= ~(1 << pin);
        this->port_mask_ |= (1 << pin);
        break;
      case PCF8574_OUTPUT:
        this->ddr_mask_ |= (1 << pin);
        this->port_mask_ &= ~(1 << pin);
        break;
      default:
        break;
    }
  
    this->write_gpio_();
  }
  bool PCF8574Component::read_gpio_() {
    if (this->is_failed())
      return false;
  
    if (this->pcf8575_) {
      if (!this->parent_->raw_receive_16(this->address_, &this->input_mask_, 1)) {
        this->status_set_warning();
        return false;
      }
    } else {
      uint8_t data;
      if (!this->parent_->raw_receive(this->address_, &data, 1)) {
        this->status_set_warning();
        return false;
      }
      this->input_mask_ = data;
    }
  
    this->status_clear_warning();
    return true;
  }
  bool PCF8574Component::write_gpio_() {
    if (this->is_failed())
      return false;
  
    uint16_t value = (this->input_mask_ & ~this->ddr_mask_) | this->port_mask_;
  
    this->parent_->raw_begin_transmission(this->address_);
    uint8_t data = value & 0xFF;
    this->parent_->raw_write(this->address_, &data, 1);
  
    if (this->pcf8575_) {
      data = (value >> 8) & 0xFF;
      this->parent_->raw_write(this->address_, &data, 1);
    }
    if (!this->parent_->raw_end_transmission(this->address_)) {
      this->status_set_warning();
      return false;
    }
    this->status_clear_warning();
    return true;
  }
  float PCF8574Component::get_setup_priority() const { return setup_priority::IO; }
  
  void PCF8574GPIOPin::setup() { this->pin_mode(this->mode_); }
  bool PCF8574GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
  void PCF8574GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
  void PCF8574GPIOPin::pin_mode(uint8_t mode) { this->parent_->pin_mode(this->pin_, mode); }
  PCF8574GPIOPin::PCF8574GPIOPin(PCF8574Component *parent, uint8_t pin, uint8_t mode, bool inverted)
      : GPIOPin(pin, mode, inverted), parent_(parent) {}
  
  }  // namespace pcf8574
  }  // namespace esphome
  