CircuitsFT232H (circuits_ft232h v0.1.0)

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Use an Adafruit FT232H breakout as an I2C master, SPI master, or GPIO controller from your host machine, via the circuits_i2c, circuits_spi, and circuits_gpio APIs.

Plug the FT232H into a USB port, point one or more of the Circuits libraries at the backends supplied by this package, and your existing drivers run unchanged against real hardware on your laptop.

# config/config.exs
import Config

config :circuits_i2c, default_backend: CircuitsFT232H.I2C.Backend
config :circuits_spi, default_backend: CircuitsFT232H.SPI.Backend
config :circuits_gpio, default_backend: CircuitsFT232H.GPIO.Backend

A single chip can act as either an I2C or an SPI master at any one time (first-open wins), and as a GPIO controller alongside whichever protocol is active — the CircuitsFT232H.Device GenServer enforces this and rejects open requests that would conflict.

See the README for wiring diagrams, Linux/macOS setup, and per-backend caveats.