pca9674a — I2C Expander Driver

8-bit I/O expander.

class PCA9674A – 8-bit I/O expander

The PCA9674A class is used to initialize the I/O expander.

Constructors

class pca9674a.PCA9674A(bus: int, irq_pin: str, address: int = 63, callback=None)

Creates an interface to talk to the I/O expander on I2C bus number bus using IRQ pin irq_pin. The address to use can be set with address. callback is called on any pin state changing.

Methods

PCA9674A.write(value: int) → None

Writes the 8-bit value to the I/O expander pins.

PCA9674A.read() → int

Returns an 8-bit value representing the pins of the I/O expander.

PCA9674A.reset() → None

Resets and initializes the I/O expander.