Struct sysfs_gpio::PinPoller
[−]
[src]
pub struct PinPoller { // some fields omitted }
Methods
impl PinPoller
[src]
fn get_pin(&self) -> Pin
Get the pin associated with this PinPoller
Note that this will be a new Pin object with the proper pin number.
fn new(pin_num: u64) -> Result<PinPoller>
Create a new PinPoller for the provided pin number
fn poll(&mut self, timeout_ms: isize) -> Result<Option<u8>>
Block until an interrupt occurs
This call will block until an interrupt occurs. The types
of interrupts which may result in this call returning
may be configured by calling set_edge()
prior to
making this call. This call makes use of epoll under the
covers. If it is desirable to poll on multiple GPIOs or
other event source, you will need to implement that logic
yourself.
This function will return Some(value) of the pin if a change is detected or None if a timeout occurs. Note that the value provided is the value of the pin as soon as we get to handling the interrupt in userspace. Each time this function returns with a value, a change has occurred, but you could end up reading the same value multiple times as the value has changed back between when the interrupt occurred and the current time.