Struct Chip

pub struct Chip { /* private fields */ }

GPIO chip

A GPIO chip object is associated with an open file descriptor to the GPIO character device. It exposes basic information about the chip and allows callers to retrieve information about each line, watch lines for state changes and make line requests.

Implementations

impl Chip

pub fn open<P: AsRef<Path>>(path: &P) -> Result<Self>

Find a chip by path.

pub fn info(&self) -> Result<Info>

Get the chip name as represented in the kernel.

pub fn path(&self) -> Result<&str>

Get the path used to find the chip.

pub fn line_info(&self, offset: Offset) -> Result<Info>

Get a snapshot of information about the line.

pub fn watch_line_info(&self, offset: Offset) -> Result<Info>

Get the current snapshot of information about the line at given offset and start watching it for future changes.

pub fn unwatch(&self, offset: Offset)

Stop watching a line

pub fn wait_info_event(&self, timeout: Option<Duration>) -> Result<bool>

Wait for line status events on any of the watched lines on the chip.

pub fn read_info_event(&self) -> Result<Event>

Read a single line status change event from the chip. If no events are pending, this function will block.

pub fn line_offset_from_name(&self, name: &str) -> Result<Offset>

Map a GPIO line’s name to its offset within the chip.

pub fn request_lines( &self, rconfig: Option<&Config>, lconfig: &Config, ) -> Result<Request>

Request a set of lines for exclusive usage.

Trait Implementations

impl AsRawFd for Chip

fn as_raw_fd(&self) -> i32

Get the file descriptor associated with the chip.

The returned file descriptor must not be closed by the caller, else other methods for the struct Chip may fail.

impl Debug for Chip

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for Chip

fn drop(&mut self)

Close the chip and release all associated resources.

impl PartialEq for Chip

fn eq(&self, other: &Chip) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Chip

impl Send for Chip

impl StructuralPartialEq for Chip