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73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/core/hal.h"
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#include "esphome/components/i2c/i2c.h"
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#include "esphome/components/gpio_expander/cached_gpio.h"
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namespace esphome {
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namespace pca6416a {
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class PCA6416AComponent : public Component,
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public i2c::I2CDevice,
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public gpio_expander::CachedGpioExpander<uint8_t, 16> {
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public:
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PCA6416AComponent() = default;
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/// Check i2c availability and setup masks
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void setup() override;
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void loop() override;
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/// Helper function to set the pin mode of a pin.
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void pin_mode(uint8_t pin, gpio::Flags flags);
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float get_setup_priority() const override;
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void dump_config() override;
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protected:
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// Virtual methods from CachedGpioExpander
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bool digital_read_hw(uint8_t pin) override;
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bool digital_read_cache(uint8_t pin) override;
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void digital_write_hw(uint8_t pin, bool value) override;
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bool read_register_(uint8_t reg, uint8_t *value);
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bool write_register_(uint8_t reg, uint8_t value);
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void update_register_(uint8_t pin, bool pin_value, uint8_t reg_addr);
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/// The mask to write as output state - 1 means HIGH, 0 means LOW
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uint8_t output_0_{0x00};
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uint8_t output_1_{0x00};
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/// Cache for input values (16-bit combined for both banks)
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uint16_t input_mask_{0x00};
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/// Storage for last I2C error seen
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esphome::i2c::ErrorCode last_error_;
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/// Only the PCAL6416A has pull-up resistors
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bool has_pullup_{false};
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};
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/// Helper class to expose a PCA6416A pin as an internal input GPIO pin.
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class PCA6416AGPIOPin : public GPIOPin {
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public:
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void setup() override;
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void pin_mode(gpio::Flags flags) override;
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bool digital_read() override;
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void digital_write(bool value) override;
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std::string dump_summary() const override;
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void set_parent(PCA6416AComponent *parent) { parent_ = parent; }
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void set_pin(uint8_t pin) { pin_ = pin; }
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void set_inverted(bool inverted) { inverted_ = inverted; }
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void set_flags(gpio::Flags flags) { flags_ = flags; }
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gpio::Flags get_flags() const override { return this->flags_; }
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protected:
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PCA6416AComponent *parent_;
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uint8_t pin_;
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bool inverted_;
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gpio::Flags flags_;
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};
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} // namespace pca6416a
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} // namespace esphome
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