View Source Circuits.I2C.Backend behaviour (circuits_i2c v2.0.4)
Backends provide the connection to the real or virtual I2C controller
Summary
Callbacks
Return the I2C bus names on this system
Return information about this backend
Open an I2C bus
Types
@type options() :: keyword()
I2C transfer options
Support for options is backend-specific. Backends are encouraged to implement the following:
:retries- a number of times to attempt to retry the transaction before failing
Callbacks
Return the I2C bus names on this system
No supported options
@callback info() :: map()
Return information about this backend
@callback open(bus_name :: String.t(), options :: keyword()) :: {:ok, Circuits.I2C.Bus.t()} | {:error, term()}
Open an I2C bus
Bus names are typically of the form "i2c-n" and available buses may be
found by calling bus_names/1.
Options:
:retries- Specify a nonnegative integer for how many times to retry a failed I2C operation.