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https://github.com/esphome/esphome.git
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b85c98abb4
Implements support for the TI TCAL6416 16-bit I2C I/O expander with the following features: - 16 GPIO pins (2 banks of 8) - Bidirectional I/O with configurable input/output modes - Support for inverted pins - Compatible with ESP32, ESP8266, and RP2040 platforms - I2C interface with configurable address (default: 0x20) The TCAL6416 provides higher current latched outputs suitable for directly driving LEDs or keypads. It operates at voltages from 1.08V to 3.6V and supports I2C speeds up to 1MHz. Addresses: https://github.com/orgs/esphome/discussions/3233
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
#pragma once
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#include "esphome/components/gpio_expander/cached_gpio.h"
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#include "esphome/components/i2c/i2c.h"
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#include "esphome/core/component.h"
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#include "esphome/core/hal.h"
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namespace esphome {
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namespace tcal6416 {
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class TCAL6416Component : 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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TCAL6416Component() = default;
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/// Check i2c availability and setup masks
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void setup() override;
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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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void loop() override;
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protected:
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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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/// Mask for the pin mode - 1 means input, 0 means output
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uint16_t mode_mask_{0xFFFF};
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/// The mask to write as output state - 1 means HIGH, 0 means LOW
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uint16_t output_mask_{0x00};
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/// The state read in digital_read_hw - 1 means HIGH, 0 means LOW
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uint16_t input_mask_{0x00};
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bool read_gpio_modes_();
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bool write_gpio_modes_();
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bool read_gpio_outputs_();
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};
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/// Helper class to expose a TCAL6416 pin as an internal input GPIO pin.
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class TCAL6416GPIOPin : public GPIOPin, public Parented<TCAL6416Component> {
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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_pin(uint8_t pin) { this->pin_ = pin; }
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void set_inverted(bool inverted) { this->inverted_ = inverted; }
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void set_flags(gpio::Flags flags) { this->flags_ = flags; }
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gpio::Flags get_flags() const override { return this->flags_; }
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protected:
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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 tcal6416
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} // namespace esphome
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