Struct ButtonKeyboard

pub struct ButtonKeyboard<'a> { /* private fields */ }

Manages the list of GPIO pins that are connected to buttons and which apps are listening for interrupts from which buttons.

Implementations

impl<'a> ButtonKeyboard<'a>

pub fn new( key_codes: &'a [u16], grant: Grant<App, UpcallCount<1>, AllowRoCount<0>, AllowRwCount<0>>, ) -> Self

Trait Implementations

impl KeyboardClient for ButtonKeyboard<'_>

fn keys_pressed(&self, keys: &[(u16, bool)], result: Result<(), ErrorCode>)

Called when one or more keys are pressed or un-pressed.

impl SyscallDriver for ButtonKeyboard<'_>

fn command( &self, command_num: usize, data: usize, _: usize, processid: ProcessId, ) -> CommandReturn

System call for a process to perform a short synchronous operation or start a long-running split-phase operation (whose completion is signaled with an upcall). Command 0 is a reserved command to detect if a peripheral system call driver is installed and must always return a CommandReturn::success.

fn allocate_grant(&self, processid: ProcessId) -> Result<(), Error>

Request to allocate a capsule’s grant for a specific process.

fn allow_userspace_readable( &self, app: ProcessId, which: usize, slice: ReadWriteProcessBuffer, ) -> Result<ReadWriteProcessBuffer, (ReadWriteProcessBuffer, ErrorCode)>

System call for a process to pass a buffer (a UserspaceReadableProcessBuffer) to the kernel that the kernel can either read or write. The kernel calls this method only after it checks that the entire buffer is within memory the process can both read and write.