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nrf/ppi: implement and add example

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This commit is contained in:
Dario Nieuwenhuis
2021-03-27 16:13:32 +01:00
parent 26705ec328
commit b6496a85d8
3 changed files with 231 additions and 22 deletions
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44
embassy-nrf/src/gpiote.rs
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@@ -7,19 +7,15 @@ use embassy::interrupt::InterruptExt;
use embassy::traits::gpio::{WaitForHigh, WaitForLow};
use embassy::util::AtomicWaker;
use embassy_extras::impl_unborrow;
use embedded_hal::digital::v2::{InputPin, OutputPin, StatefulOutputPin};
use embedded_hal::digital::v2::{InputPin, StatefulOutputPin};
use futures::future::poll_fn;
use crate::gpio::sealed::Pin as _;
use crate::gpio::{AnyPin, Input, Output, Pin as GpioPin, Port, Pull};
use crate::gpio::{AnyPin, Input, Output, Pin as GpioPin, Port};
use crate::pac;
use crate::pac::generic::Reg;
use crate::pac::gpiote::_TASKS_OUT;
use crate::ppi::{Event, Task};
use crate::{interrupt, peripherals};
#[cfg(not(feature = "51"))]
use crate::pac::gpiote::{_TASKS_CLR, _TASKS_SET};
pub const CHANNEL_COUNT: usize = 8;
#[cfg(any(feature = "52833", feature = "52840"))]
@@ -53,7 +49,7 @@ pub struct Initialized {
_private: (),
}
pub fn initialize(gpiote: peripherals::GPIOTE, irq: interrupt::GPIOTE) -> Initialized {
pub fn initialize(_gpiote: peripherals::GPIOTE, irq: interrupt::GPIOTE) -> Initialized {
#[cfg(any(feature = "52833", feature = "52840"))]
let ports = unsafe { &[&*pac::P0::ptr(), &*pac::P1::ptr()] };
#[cfg(not(any(feature = "52833", feature = "52840")))]
@@ -122,6 +118,7 @@ impl Iterator for BitIter {
}
}
/// GPIOTE channel driver in input mode
pub struct InputChannel<'d, C: Channel, T: GpioPin> {
ch: C,
pin: Input<'d, T>,
@@ -185,6 +182,12 @@ impl<'d, C: Channel, T: GpioPin> InputChannel<'d, C, T> {
})
.await;
}
/// Returns the IN event, for use with PPI.
pub fn event_in(&self) -> Event {
let g = unsafe { &*pac::GPIOTE::ptr() };
Event::from_reg(&g.events_in[self.ch.number()])
}
}
impl<'d, C: Channel, T: GpioPin> InputPin for InputChannel<'d, C, T> {
@@ -199,9 +202,10 @@ impl<'d, C: Channel, T: GpioPin> InputPin for InputChannel<'d, C, T> {
}
}
/// GPIOTE channel driver in output mode
pub struct OutputChannel<'d, C: Channel, T: GpioPin> {
ch: C,
pin: Output<'d, T>,
_pin: Output<'d, T>,
}
impl<'d, C: Channel, T: GpioPin> Drop for OutputChannel<'d, C, T> {
@@ -242,7 +246,7 @@ impl<'d, C: Channel, T: GpioPin> OutputChannel<'d, C, T> {
unsafe { w.psel().bits(pin.pin.pin()) }
});
OutputChannel { ch, pin }
OutputChannel { ch, _pin: pin }
}
/// Triggers `task out` (as configured with task_out_polarity, defaults to Toggle).
@@ -265,28 +269,28 @@ impl<'d, C: Channel, T: GpioPin> OutputChannel<'d, C, T> {
g.tasks_clr[self.ch.number()].write(|w| unsafe { w.bits(1) });
}
/// Returns reference to task_out endpoint for PPI.
pub fn task_out(&self) -> &Reg<u32, _TASKS_OUT> {
/// Returns the OUT task, for use with PPI.
pub fn task_out(&self) -> Task {
let g = unsafe { &*pac::GPIOTE::ptr() };
&g.tasks_out[self.ch.number()]
Task::from_reg(&g.tasks_out[self.ch.number()])
}
/// Returns reference to task_clr endpoint for PPI.
/// Returns the CLR task, for use with PPI.
#[cfg(not(feature = "51"))]
pub fn task_clr(&self) -> &Reg<u32, _TASKS_CLR> {
pub fn task_clr(&self) -> Task {
let g = unsafe { &*pac::GPIOTE::ptr() };
&g.tasks_clr[self.ch.number()]
Task::from_reg(&g.tasks_clr[self.ch.number()])
}
/// Returns reference to task_set endpoint for PPI.
/// Returns the SET task, for use with PPI.
#[cfg(not(feature = "51"))]
pub fn task_set(&self) -> &Reg<u32, _TASKS_SET> {
pub fn task_set(&self) -> Task {
let g = unsafe { &*pac::GPIOTE::ptr() };
&g.tasks_set[self.ch.number()]
Task::from_reg(&g.tasks_set[self.ch.number()])
}
}
/// GPIO input driver with support
/// GPIOTE port input driver
pub struct PortInput<'d, T: GpioPin> {
pin: Input<'d, T>,
}