# `CircuitsFT232H.SPI.Backend`

`Circuits.SPI.Backend` implementation that exposes each connected FT232H as
a SPI bus named `"ftdi-<id>-spi"`.

Configure with:

    config :circuits_spi, default_backend: CircuitsFT232H.SPI.Backend

Then use `Circuits.SPI.open/2` as you would on a Nerves target. The first
call for a given chip starts a `CircuitsFT232H.Device` GenServer under
`CircuitsFT232H.DeviceSupervisor`; the bus then claims the SPI mode lock
until it is closed.

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*Consult [api-reference.md](api-reference.md) for complete listing*