Struct capsules::led::LED

pub struct LED<'a, G: Pin + 'a> {
    pins_init: &'a [(&'a G, ActivationMode)],
}

Holds the array of GPIO pins attached to the LEDs and implements a Driver interface to control them.

Fields

pins_init: &'a [(&'a G, ActivationMode)]

Methods

impl<'a, G: Pin + PinCtl> LED<'a, G>

pub fn new(pins_init: &'a [(&'a G, ActivationMode)]) -> LED<'a, G>

Trait Implementations

impl<'a, G: Pin + PinCtl> Driver for LED<'a, G>

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

Control the LEDs.

command_num

• 0: Returns the number of LEDs on the board. This will always be 0 or greater, and therefore also allows for checking for this driver.
• 1: Turn the LED at index specified by data on. Returns EINVAL if the LED index is not valid.
• 2: Turn the LED at index specified by data off. Returns EINVAL if the LED index is not valid.
• 3: Toggle the LED at index specified by data on or off. Returns EINVAL if the LED index is not valid.

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

subscribe lets an application pass a callback to the driver to be called later. This returns ENOSUPPORT if not used.

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.