Module rainfall

Provides userspace with access to rain fall sensors.

Userspace Interface

subscribe System Call

The subscribe system call supports the single subscribe_number zero, which is used to provide a callback that will return back the result of a rain fall reading.

command System Call

The command system call support one argument cmd which is used to specify the specific operation, currently the following cmd’s are supported:

• 0: check whether the driver exists
• 1: read rainfall

The possible return from the ‘command’ system call indicates the following:

• Ok(()): The operation has been successful.
• NOSUPPORT: Invalid cmd.
• NOMEM: Insufficient memory available.
• INVAL: Invalid address of the buffer or other error.

Usage

You need a device that provides the hil::sensors::RainFallDriver trait.

Structs

App

RainFallSensor

Constants

DRIVER_NUM