pca9505.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/core/hal.h"
#include "esphome/core/helpers.h"
#include "esphome/components/gpio_expander/cached_gpio.h"
#include "esphome/components/i2c/i2c.h"
 
namespace esphome::pca9505 {
 
static constexpr uint8_t PIN_COUNT = 40;
static constexpr uint8_t BANK_COUNT = PIN_COUNT / 8;
 
class PCA9505Component final : public Component,
                               public i2c::I2CDevice,
                               public gpio_expander::CachedGpioExpander<uint8_t, PIN_COUNT> {
 public:
  void set_interrupt_pin(InternalGPIOPin *pin) { this->interrupt_pin_ = pin; }
 
  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;
 
 protected:
  static void IRAM_ATTR gpio_intr(PCA9505Component *arg);
 
  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;
 
  bool read_bank_(uint8_t bank);
  bool write_bank_(uint8_t reg, uint8_t bank, uint8_t value);
  bool write_all_banks_(uint8_t reg, uint8_t value);
 
  uint8_t config_[BANK_COUNT]{};
  uint8_t output_[BANK_COUNT]{};
  uint8_t input_[BANK_COUNT]{};
  uint8_t mask_[BANK_COUNT]{};
  InternalGPIOPin *interrupt_pin_{nullptr};
};
 
class PCA9505GPIOPin final : public GPIOPin, public Parented<PCA9505Component> {
 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_pin(uint8_t pin) { this->pin_ = pin; }
  void set_inverted(bool inverted) { this->inverted_ = inverted; }
  void set_flags(gpio::Flags flags) { this->flags_ = flags; }
 
  gpio::Flags get_flags() const override { return this->flags_; }
 
 protected:
  uint8_t pin_{0};
  bool inverted_{false};
  gpio::Flags flags_{};
};
 
}  // namespace esphome::pca9505