Crate tca9534_driver_rs 

TCA9534 I2C IO Expander driver

This is a platform-independent Rust driver for the TCA9534, an 8-bit I2C IO expander, with optional embedded-hal integration.

Both synchronous and asynchronous versions are provided, selectable via feature flags.

Example Usage

Synchronous Usage

use tca9534::{TCA9534Sync, PinConfig, PinLevel, addresses};

// Initialize I2C bus (platform specific)
let i2c = setup_i2c(); // Your I2C initialization code

// Create TCA9534 driver with address 0x20
let mut tca9534 = TCA9534Sync::new(i2c, addresses::ADDR_000);

// Or use default address constructor  
let mut tca9534 = TCA9534Sync::new_with_default_address(i2c);

// Initialize the device
tca9534.init()?;

// Configure pin 0 as output, others as input
tca9534.set_pin_config(0, PinConfig::Output)?;
tca9534.set_pin_config(1, PinConfig::Input)?;

// Set pin 0 to high
tca9534.set_pin_output(0, PinLevel::High)?;

// Read pin 1 input
let pin1_level = tca9534.read_pin_input(1)?;

Asynchronous Usage (with async feature)

use tca9534::{TCA9534Async, PinConfig, PinLevel, addresses};

// Initialize async I2C bus (platform specific)
let i2c = setup_async_i2c(); // Your async I2C initialization code

// Create TCA9534 driver with address 0x20
let mut tca9534 = TCA9534Async::new(i2c, addresses::ADDR_000);

// Initialize the device
tca9534.init().await?;

// Configure and use pins
tca9534.set_pin_config(0, PinConfig::Output).await?;
tca9534.set_pin_output(0, PinLevel::High).await?;

let input_level = tca9534.read_pin_input(1).await?;

Modules

addresses

Common I2C addresses for TCA9534 based on A2, A1, A0 pins

config

Configuration constants

Structs

TCA9534Asyncasync

TCA9534 asynchronous driver structure

TCA9534Sync

TCA9534 synchronous driver structure

Enums

PinConfig

Pin configuration (direction)

PinLevel

Pin logic level

PinPolarity

Pin polarity setting

Register

TCA9534 register definitions

TCA9534CoreError

Core TCA9534 errors that don’t depend on transport

TCA9534Error

TCA9534 driver error type

Traits

AsyncTransportasync

An asynchronous I2C transport.

SyncTransport

A synchronous I2C transport.

Type Aliases

Pin

Pin number type (0-7)

PortValue

Port value type (8-bit value representing all pins)