pca9554.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/core/hal.h"
#include "esphome/components/i2c/i2c.h"
#include "esphome/components/gpio_expander/cached_gpio.h"
 
namespace esphome::pca9554 {
 
class PCA9554Component : public Component,
                         public i2c::I2CDevice,
                         public gpio_expander::CachedGpioExpander<uint16_t, 16> {
 public:
  PCA9554Component() = default;
 
  void setup() override;
  void loop() override;
  void pin_mode(uint8_t pin, gpio::Flags flags);
 
  float get_setup_priority() const override;
 
  void dump_config() override;
 
  void set_pin_count(size_t pin_count) { this->pin_count_ = pin_count; }
  void set_interrupt_pin(InternalGPIOPin *pin) { this->interrupt_pin_ = pin; }
 
 protected:
  static void IRAM_ATTR gpio_intr(PCA9554Component *arg);
 
  bool read_inputs_();
  bool write_register_(uint8_t reg, uint16_t value);
 
  // Virtual methods from CachedGpioExpander
  bool digital_read_hw(uint8_t pin) override;
  bool digital_read_cache(uint8_t pin) override;
  void digital_write_hw(uint8_t pin, bool value) override;
 
  size_t pin_count_{8};
  size_t reg_width_{1};
  uint16_t config_mask_{0x00};
  uint16_t output_mask_{0x00};
  uint16_t input_mask_{0x00};
  esphome::i2c::ErrorCode last_error_;
  InternalGPIOPin *interrupt_pin_{nullptr};
};
 
class PCA9554GPIOPin : public GPIOPin {
 public:
  void setup() override;
  void pin_mode(gpio::Flags flags) override;
  bool digital_read() override;
  void digital_write(bool value) override;
  size_t dump_summary(char *buffer, size_t len) const override;
 
  void set_parent(PCA9554Component *parent) { parent_ = parent; }
  void set_pin(uint8_t pin) { pin_ = pin; }
  void set_inverted(bool inverted) { inverted_ = inverted; }
  void set_flags(gpio::Flags flags) { flags_ = flags; }
 
  gpio::Flags get_flags() const override { return this->flags_; }
 
 protected:
  PCA9554Component *parent_;
  uint8_t pin_;
  bool inverted_;
  gpio::Flags flags_;
};
 
}  // namespace esphome::pca9554