have fun

components/pca9554_2/pca9554.h

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+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/core/esphal.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace pca9554 {
+
+/// Modes for PCA9554 pins
+enum PCA9554GPIOMode : uint8_t {
+  PCA9554_INPUT = INPUT,
+  PCA9554_OUTPUT = OUTPUT,
+};
+
+class PCA9554Component : public Component, public i2c::I2CDevice {
+ public:
+  PCA9554Component() = default;
+
+  /// Check i2c availability and setup masks
+  void setup() override;
+  /// Helper function to read the value of a pin.
+  bool digital_read(uint8_t pin);
+  /// Helper function to write the value of a pin.
+  void digital_write(uint8_t pin, bool value);
+  /// Helper function to set the pin mode of a pin.
+  void pin_mode(uint8_t pin, uint8_t mode);
+
+  float get_setup_priority() const override;
+
+  void dump_config() override;
+
+ protected:
+  bool read_gpio_();
+
+  bool write_gpio_();
+
+  /// Mask for the pin mode - 1 means input, 0 means output
+  uint16_t mode_mask_{0x00};
+  /// The mask to write as output state - 1 means HIGH, 0 means LOW
+  uint16_t output_mask_{0x00};
+  /// The state read in read_gpio_ - 1 means HIGH, 0 means LOW
+  uint16_t input_mask_{0x00};
+};
+
+/// Helper class to expose a PCA9554 pin as an internal input GPIO pin.
+class PCA9554GPIOPin : public GPIOPin {
+ public:
+  PCA9554GPIOPin(PCA9554Component *parent, uint8_t pin, uint8_t mode, bool inverted = false);
+
+  void setup() override;
+  void pin_mode(uint8_t mode) override;
+  bool digital_read() override;
+  void digital_write(bool value) override;
+
+ protected:
+  PCA9554Component *parent_;
+};
+
+}  // namespace pca9554
+}  // namespace esphome