Trait embedded_hal_async::digital::Wait
source · pub trait Wait: ErrorType {
// Required methods
async fn wait_for_high(&mut self) -> Result<(), Self::Error>;
async fn wait_for_low(&mut self) -> Result<(), Self::Error>;
async fn wait_for_rising_edge(&mut self) -> Result<(), Self::Error>;
async fn wait_for_falling_edge(&mut self) -> Result<(), Self::Error>;
async fn wait_for_any_edge(&mut self) -> Result<(), Self::Error>;
}Expand description
Asynchronously wait for GPIO pin state.
Required Methods§
sourceasync fn wait_for_high(&mut self) -> Result<(), Self::Error>
async fn wait_for_high(&mut self) -> Result<(), Self::Error>
Wait until the pin is high. If it is already high, return immediately.
Note for implementers
The pin may have switched back to low before the task was run after being woken. The future should still resolve in that case.
sourceasync fn wait_for_low(&mut self) -> Result<(), Self::Error>
async fn wait_for_low(&mut self) -> Result<(), Self::Error>
Wait until the pin is low. If it is already low, return immediately.
Note for implementers
The pin may have switched back to high before the task was run after being woken. The future should still resolve in that case.
sourceasync fn wait_for_rising_edge(&mut self) -> Result<(), Self::Error>
async fn wait_for_rising_edge(&mut self) -> Result<(), Self::Error>
Wait for the pin to undergo a transition from low to high.
If the pin is already high, this does not return immediately, it’ll wait for the pin to go low and then high again.
sourceasync fn wait_for_falling_edge(&mut self) -> Result<(), Self::Error>
async fn wait_for_falling_edge(&mut self) -> Result<(), Self::Error>
Wait for the pin to undergo a transition from high to low.
If the pin is already low, this does not return immediately, it’ll wait for the pin to go high and then low again.
sourceasync fn wait_for_any_edge(&mut self) -> Result<(), Self::Error>
async fn wait_for_any_edge(&mut self) -> Result<(), Self::Error>
Wait for the pin to undergo any transition, i.e low to high OR high to low.