Struct capsules::ambient_light::AmbientLight

pub struct AmbientLight<'a> {
    sensor: &'a AmbientLight,
    command_pending: Cell<bool>,
    apps: Grant<App>,
}

Fields

sensor: &'a AmbientLight

command_pending: Cell<bool>

apps: Grant<App>

Methods

impl<'a> AmbientLight<'a>

pub fn new(sensor: &'a AmbientLight, grant: Grant<App>) -> AmbientLight

fn enqueue_sensor_reading(&self, appid: AppId) -> ReturnCode

Trait Implementations

impl<'a> Driver for AmbientLight<'a>

fn subscribe(&self, subscribe_num: usize, callback: Callback) -> ReturnCode

Subscribe to light intensity readings

subscribe

• 0: Subscribe to light intensity readings. The callback signature is fn(lux: usize), where lux is the light intensity in lux (lx).

fn command(
    &self,
    command_num: usize,
    _arg1: usize,
    _: usize,
    appid: AppId
) -> ReturnCode

Initiate light intensity readings

Sensor readings are coalesced if processes request them concurrently. If multiple processes request have outstanding requests for a sensor reading, only one command will be issued and the result is returned to all subscribed processes.

command_num

• 0: Check driver presence
• 1: Start a light sensor reading

fn allow(
    &self,
    app: AppId,
    minor_num: usize,
    slice: AppSlice<Shared, u8>
) -> ReturnCode

allow lets an application give the driver access to a buffer in the application's memory. This returns ENOSUPPORT if not used.

impl<'a> AmbientLightClient for AmbientLight<'a>

fn callback(&self, lux: usize)

Called when an ambient light reading has completed.