max/embassy
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hal-common: remove Pin in PeripheralMutex

Browse Source
This commit is contained in:
Dario Nieuwenhuis 2021-07-29 14:08:32 +02:00
parent de207764ae
commit af87031d62
7 changed files with 171 additions and 197 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

130
embassy-hal-common/src/peripheral.rs
View File

@ -1,6 +1,5 @@
use core::cell::UnsafeCell;
use core::marker::{PhantomData, PhantomPinned};
use core::pin::Pin;
use core::marker::PhantomData;
use core::mem::MaybeUninit;
use cortex_m::peripheral::scb::VectActive;
use cortex_m::peripheral::{NVIC, SCB};
@ -10,23 +9,23 @@ use embassy::interrupt::{Interrupt, InterruptExt};
///
/// It needs to be `Send` because `&mut` references are sent back and forth between the 'thread' which owns the `PeripheralMutex` and the interrupt,
/// and `&mut T` is only `Send` where `T: Send`.
///
/// It also requires `'static` to be used safely with `PeripheralMutex::register_interrupt`,
/// because although `Pin` guarantees that the memory of the state won't be invalidated,
/// it doesn't guarantee that the lifetime will last.
pub trait PeripheralState: Send {
type Interrupt: Interrupt;
fn on_interrupt(&mut self);
}
pub struct PeripheralMutex<S: PeripheralState> {
state: UnsafeCell<S>,
pub struct StateStorage<S>(MaybeUninit<S>);
irq_setup_done: bool,
impl<S> StateStorage<S> {
pub fn new() -> Self {
Self(MaybeUninit::uninit())
}
}
pub struct PeripheralMutex<'a, S: PeripheralState> {
state: *mut S,
_phantom: PhantomData<&'a mut S>,
irq: S::Interrupt,
_not_send: PhantomData<*mut ()>,
_pinned: PhantomPinned,
}
/// Whether `irq` can be preempted by the current interrupt.
@ -50,58 +49,45 @@ pub(crate) fn can_be_preempted(irq: &impl Interrupt) -> bool {
}
}
impl<S: PeripheralState + 'static> PeripheralMutex<S> {
/// Registers `on_interrupt` as the wrapped interrupt's interrupt handler and enables it.
///
/// This requires this `PeripheralMutex`'s `PeripheralState` to live for `'static`,
/// because `Pin` only guarantees that it's memory won't be repurposed,
/// not that it's lifetime will last.
///
/// To use non-`'static` `PeripheralState`, use the unsafe `register_interrupt_unchecked`.
///
/// Note: `'static` doesn't mean it _has_ to live for the entire program, like an `&'static T`;
/// it just means it _can_ live for the entire program - for example, `u8` lives for `'static`.
pub fn register_interrupt(self: Pin<&mut Self>) {
// SAFETY: `S: 'static`, so there's no way it's lifetime can expire.
unsafe { self.register_interrupt_unchecked() }
}
}
impl<S: PeripheralState> PeripheralMutex<S> {
impl<'a, S: PeripheralState> PeripheralMutex<'a, S> {
/// Create a new `PeripheralMutex` wrapping `irq`, with the initial state `state`.
pub fn new(state: S, irq: S::Interrupt) -> Self {
///
/// self requires `state` to live for `'static`, because if the `PeripheralMutex` is leaked, the
/// interrupt won't be disabled, which may try accessing the state at any time. To use non-`'static`
/// state, see [`Self::new_unchecked`].
///
/// Registers `on_interrupt` as the `irq`'s handler, and enables it.
pub fn new(storage: &'a mut StateStorage<S>, state: S, irq: S::Interrupt) -> Self
where
'a: 'static,
{
// safety: safe because state is `'static`.
unsafe { Self::new_unchecked(storage, state, irq) }
}
/// Create a `PeripheralMutex` without requiring the state is `'static`.
///
/// See also [`Self::new`].
///
/// # Safety
/// The created instance must not be leaked (its `drop` must run).
pub unsafe fn new_unchecked(
storage: &'a mut StateStorage<S>,
state: S,
irq: S::Interrupt,
) -> Self {
if can_be_preempted(&irq) {
panic!("`PeripheralMutex` cannot be created in an interrupt with higher priority than the interrupt it wraps");
}
Self {
irq,
irq_setup_done: false,
let state_ptr = storage.0.as_mut_ptr();
state: UnsafeCell::new(state),
_not_send: PhantomData,
_pinned: PhantomPinned,
}
}
// Safety: The pointer is valid and not used by anyone else
// because we have the `&mut StateStorage`.
state_ptr.write(state);
/// Registers `on_interrupt` as the wrapped interrupt's interrupt handler and enables it.
///
/// # Safety
/// The lifetime of any data in `PeripheralState` that is accessed by the interrupt handler
/// must not end without `Drop` being called on this `PeripheralMutex`.
///
/// This can be accomplished by either not accessing any data with a lifetime in `on_interrupt`,
/// or making sure that nothing like `mem::forget` is used on the `PeripheralMutex`.
// TODO: this name isn't the best.
pub unsafe fn register_interrupt_unchecked(self: Pin<&mut Self>) {
let this = self.get_unchecked_mut();
if this.irq_setup_done {
return;
}
this.irq.disable();
this.irq.set_handler(|p| {
irq.disable();
irq.set_handler(|p| {
// Safety: it's OK to get a &mut to the state, since
// - We checked that the thread owning the `PeripheralMutex` can't preempt us in `new`.
// Interrupts' priorities can only be changed with raw embassy `Interrupts`,
@ -110,23 +96,24 @@ impl<S: PeripheralState> PeripheralMutex<S> {
let state = unsafe { &mut *(p as *mut S) };
state.on_interrupt();
});
this.irq
.set_handler_context((&mut this.state) as *mut _ as *mut ());
this.irq.enable();
irq.set_handler_context(state_ptr as *mut ());
irq.enable();
this.irq_setup_done = true;
Self {
irq,
state: state_ptr,
_phantom: PhantomData,
}
}
pub fn with<R>(self: Pin<&mut Self>, f: impl FnOnce(&mut S) -> R) -> R {
let this = unsafe { self.get_unchecked_mut() };
this.irq.disable();
pub fn with<R>(&mut self, f: impl FnOnce(&mut S) -> R) -> R {
self.irq.disable();
// Safety: it's OK to get a &mut to the state, since the irq is disabled.
let state = unsafe { &mut *this.state.get() };
let state = unsafe { &mut *self.state };
let r = f(state);
this.irq.enable();
self.irq.enable();
r
}
@ -152,9 +139,14 @@ impl<S: PeripheralState> PeripheralMutex<S> {
}
}
impl<S: PeripheralState> Drop for PeripheralMutex<S> {
impl<'a, S: PeripheralState> Drop for PeripheralMutex<'a, S> {
fn drop(&mut self) {
self.irq.disable();
self.irq.remove_handler();
// safety:
// - we initialized the state in `new`, so we know it's initialized.
// - the irq is disabled, so it won't preempt us while dropping.
unsafe { self.state.drop_in_place() }
}
}

49
embassy-hal-common/src/usb/mod.rs
View File

@ -9,14 +9,31 @@ use usb_device::device::UsbDevice;
mod cdc_acm;
pub mod usb_serial;
use crate::peripheral::{PeripheralMutex, PeripheralState};
use crate::peripheral::{PeripheralMutex, PeripheralState, StateStorage};
use embassy::interrupt::Interrupt;
use usb_serial::{ReadInterface, UsbSerial, WriteInterface};
/// Marker trait to mark an interrupt to be used with the [`Usb`] abstraction.
pub unsafe trait USBInterrupt: Interrupt + Send {}
pub(crate) struct State<'bus, B, T, I>
pub struct State<'bus, B, T, I>(StateStorage<StateInner<'bus, B, T, I>>)
where
B: UsbBus,
T: ClassSet<B>,
I: USBInterrupt;
impl<'bus, B, T, I> State<'bus, B, T, I>
where
B: UsbBus,
T: ClassSet<B>,
I: USBInterrupt,
{
pub fn new() -> Self {
Self(StateStorage::new())
}
}
pub(crate) struct StateInner<'bus, B, T, I>
where
B: UsbBus,
T: ClassSet<B>,
@ -34,7 +51,7 @@ where
I: USBInterrupt,
{
// Don't you dare moving out `PeripheralMutex`
inner: RefCell<PeripheralMutex<State<'bus, B, T, I>>>,
inner: RefCell<PeripheralMutex<'bus, StateInner<'bus, B, T, I>>>,
}
impl<'bus, B, T, I> Usb<'bus, B, T, I>
@ -43,30 +60,22 @@ where
T: ClassSet<B>,
I: USBInterrupt,
{
pub fn new<S: IntoClassSet<B, T>>(device: UsbDevice<'bus, B>, class_set: S, irq: I) -> Self {
let state = State {
pub fn new<S: IntoClassSet<B, T>>(
state: &'bus mut State<'bus, B, T, I>,
device: UsbDevice<'bus, B>,
class_set: S,
irq: I,
) -> Self {
let initial_state = StateInner {
device,
classes: class_set.into_class_set(),
_interrupt: PhantomData,
};
let mutex = PeripheralMutex::new(state, irq);
let mutex = unsafe { PeripheralMutex::new_unchecked(&mut state.0, initial_state, irq) };
Self {
inner: RefCell::new(mutex),
}
}
/// # Safety
/// The `UsbDevice` passed to `Self::new` must not be dropped without calling `Drop` on this `Usb` first.
pub unsafe fn start(self: Pin<&mut Self>) {
let this = self.get_unchecked_mut();
let mut mutex = this.inner.borrow_mut();
let mutex = Pin::new_unchecked(&mut *mutex);
// Use inner to register the irq
// SAFETY: the safety contract of this function makes sure the `UsbDevice` won't be invalidated
// without the `PeripheralMutex` being dropped.
mutex.register_interrupt_unchecked();
}
}
impl<'bus, 'c, B, T, I> Usb<'bus, B, T, I>
@ -129,7 +138,7 @@ where
}
}
impl<'bus, B, T, I> PeripheralState for State<'bus, B, T, I>
impl<'bus, B, T, I> PeripheralState for StateInner<'bus, B, T, I>
where
B: UsbBus,
T: ClassSet<B>,

10
embassy-hal-common/src/usb/usb_serial.rs
View File

@ -10,9 +10,10 @@ use usb_device::class_prelude::*;
use usb_device::UsbError;
use super::cdc_acm::CdcAcmClass;
use super::StateInner;
use crate::peripheral::PeripheralMutex;
use crate::ring_buffer::RingBuffer;
use crate::usb::{ClassSet, SerialState, State, USBInterrupt};
use crate::usb::{ClassSet, SerialState, USBInterrupt};
pub struct ReadInterface<'a, 'bus, 'c, I, B, T, INT>
where
@ -22,7 +23,7 @@ where
INT: USBInterrupt,
{
// Don't you dare moving out `PeripheralMutex`
pub(crate) inner: &'a RefCell<PeripheralMutex<State<'bus, B, T, INT>>>,
pub(crate) inner: &'a RefCell<PeripheralMutex<'bus, StateInner<'bus, B, T, INT>>>,
pub(crate) _buf_lifetime: PhantomData<&'c T>,
pub(crate) _index: PhantomData<I>,
}
@ -39,7 +40,7 @@ where
INT: USBInterrupt,
{
// Don't you dare moving out `PeripheralMutex`
pub(crate) inner: &'a RefCell<PeripheralMutex<State<'bus, B, T, INT>>>,
pub(crate) inner: &'a RefCell<PeripheralMutex<'bus, StateInner<'bus, B, T, INT>>>,
pub(crate) _buf_lifetime: PhantomData<&'c T>,
pub(crate) _index: PhantomData<I>,
}
@ -54,7 +55,6 @@ where
fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<&[u8]>> {
let this = self.get_mut();
let mut mutex = this.inner.borrow_mut();
let mutex = unsafe { Pin::new_unchecked(&mut *mutex) };
mutex.with(|state| {
let serial = state.classes.get_serial();
let serial = Pin::new(serial);
@ -76,7 +76,6 @@ where
fn consume(self: Pin<&mut Self>, amt: usize) {
let this = self.get_mut();
let mut mutex = this.inner.borrow_mut();
let mutex = unsafe { Pin::new_unchecked(&mut *mutex) };
mutex.with(|state| {
let serial = state.classes.get_serial();
let serial = Pin::new(serial);
@ -100,7 +99,6 @@ where
) -> Poll<io::Result<usize>> {
let this = self.get_mut();
let mut mutex = this.inner.borrow_mut();
let mutex = unsafe { Pin::new_unchecked(&mut *mutex) };
mutex.with(|state| {
let serial = state.classes.get_serial();
let serial = Pin::new(serial);

94
embassy-nrf/src/buffered_uarte.rs
View File

@ -7,7 +7,7 @@ use core::task::{Context, Poll};
use embassy::interrupt::InterruptExt;
use embassy::io::{AsyncBufRead, AsyncWrite, Result};
use embassy::util::{Unborrow, WakerRegistration};
use embassy_hal_common::peripheral::{PeripheralMutex, PeripheralState};
use embassy_hal_common::peripheral::{PeripheralMutex, PeripheralState, StateStorage};
use embassy_hal_common::ring_buffer::RingBuffer;
use embassy_hal_common::{low_power_wait_until, unborrow};
@ -35,7 +35,14 @@ enum TxState {
Transmitting(usize),
}
struct State<'d, U: UarteInstance, T: TimerInstance> {
pub struct State<'d, U: UarteInstance, T: TimerInstance>(StateStorage<StateInner<'d, U, T>>);
impl<'d, U: UarteInstance, T: TimerInstance> State<'d, U, T> {
pub fn new() -> Self {
Self(StateStorage::new())
}
}
struct StateInner<'d, U: UarteInstance, T: TimerInstance> {
phantom: PhantomData<&'d mut U>,
timer: Timer<'d, T>,
_ppi_ch1: Ppi<'d, AnyConfigurableChannel>,
@ -51,20 +58,16 @@ struct State<'d, U: UarteInstance, T: TimerInstance> {
}
/// Interface to a UARTE instance
///
/// This is a very basic interface that comes with the following limitations:
/// - The UARTE instances share the same address space with instances of UART.
/// You need to make sure that conflicting instances
/// are disabled before using `Uarte`. See product specification:
/// - nrf52832: Section 15.2
/// - nrf52840: Section 6.1.2
pub struct BufferedUarte<'d, U: UarteInstance, T: TimerInstance> {
inner: PeripheralMutex<State<'d, U, T>>,
inner: PeripheralMutex<'d, StateInner<'d, U, T>>,
}
impl<'d, U: UarteInstance, T: TimerInstance> Unpin for BufferedUarte<'d, U, T> {}
impl<'d, U: UarteInstance, T: TimerInstance> BufferedUarte<'d, U, T> {
/// unsafe: may not leak self or futures
pub unsafe fn new(
state: &'d mut State<'d, U, T>,
_uarte: impl Unborrow<Target = U> + 'd,
timer: impl Unborrow<Target = T> + 'd,
ppi_ch1: impl Unborrow<Target = impl ConfigurableChannel> + 'd,
@ -152,31 +155,28 @@ impl<'d, U: UarteInstance, T: TimerInstance> BufferedUarte<'d, U, T> {
ppi_ch2.set_task(Task::from_reg(&r.tasks_stoprx));
ppi_ch2.enable();
BufferedUarte {
inner: PeripheralMutex::new(
State {
phantom: PhantomData,
timer,
_ppi_ch1: ppi_ch1,
_ppi_ch2: ppi_ch2,
let initial_state = StateInner {
phantom: PhantomData,
timer,
_ppi_ch1: ppi_ch1,
_ppi_ch2: ppi_ch2,
rx: RingBuffer::new(rx_buffer),
rx_state: RxState::Idle,
rx_waker: WakerRegistration::new(),
rx: RingBuffer::new(rx_buffer),
rx_state: RxState::Idle,
rx_waker: WakerRegistration::new(),
tx: RingBuffer::new(tx_buffer),
tx_state: TxState::Idle,
tx_waker: WakerRegistration::new(),
},
irq,
),
tx: RingBuffer::new(tx_buffer),
tx_state: TxState::Idle,
tx_waker: WakerRegistration::new(),
};
Self {
inner: PeripheralMutex::new_unchecked(&mut state.0, initial_state, irq),
}
}
pub fn set_baudrate(self: Pin<&mut Self>, baudrate: Baudrate) {
let mut inner = self.inner();
unsafe { inner.as_mut().register_interrupt_unchecked() }
inner.with(|state| {
pub fn set_baudrate(&mut self, baudrate: Baudrate) {
self.inner.with(|state| {
let r = U::regs();
let timeout = 0x8000_0000 / (baudrate as u32 / 40);
@ -186,17 +186,11 @@ impl<'d, U: UarteInstance, T: TimerInstance> BufferedUarte<'d, U, T> {
r.baudrate.write(|w| w.baudrate().variant(baudrate));
});
}
fn inner(self: Pin<&mut Self>) -> Pin<&mut PeripheralMutex<State<'d, U, T>>> {
unsafe { Pin::new_unchecked(&mut self.get_unchecked_mut().inner) }
}
}
impl<'d, U: UarteInstance, T: TimerInstance> AsyncBufRead for BufferedUarte<'d, U, T> {
fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<&[u8]>> {
let mut inner = self.inner();
unsafe { inner.as_mut().register_interrupt_unchecked() }
inner.with(|state| {
fn poll_fill_buf(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<&[u8]>> {
self.inner.with(|state| {
// Conservative compiler fence to prevent optimizations that do not
// take in to account actions by DMA. The fence has been placed here,
// before any DMA action has started
@ -218,22 +212,22 @@ impl<'d, U: UarteInstance, T: TimerInstance> AsyncBufRead for BufferedUarte<'d,
})
}
fn consume(self: Pin<&mut Self>, amt: usize) {
let mut inner = self.inner();
unsafe { inner.as_mut().register_interrupt_unchecked() }
inner.as_mut().with(|state| {
fn consume(mut self: Pin<&mut Self>, amt: usize) {
self.inner.with(|state| {
trace!("consume {:?}", amt);
state.rx.pop(amt);
});
inner.pend();
self.inner.pend();
}
}
impl<'d, U: UarteInstance, T: TimerInstance> AsyncWrite for BufferedUarte<'d, U, T> {
fn poll_write(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8]) -> Poll<Result<usize>> {
let mut inner = self.inner();
unsafe { inner.as_mut().register_interrupt_unchecked() }
let poll = inner.as_mut().with(|state| {
fn poll_write(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<Result<usize>> {
let poll = self.inner.with(|state| {
trace!("poll_write: {:?}", buf.len());
let tx_buf = state.tx.push_buf();
@ -257,13 +251,13 @@ impl<'d, U: UarteInstance, T: TimerInstance> AsyncWrite for BufferedUarte<'d, U,
Poll::Ready(Ok(n))
});
inner.pend();
self.inner.pend();
poll
}
}
impl<'a, U: UarteInstance, T: TimerInstance> Drop for State<'a, U, T> {
impl<'a, U: UarteInstance, T: TimerInstance> Drop for StateInner<'a, U, T> {
fn drop(&mut self) {
let r = U::regs();
@ -285,7 +279,7 @@ impl<'a, U: UarteInstance, T: TimerInstance> Drop for State<'a, U, T> {
}
}
impl<'a, U: UarteInstance, T: TimerInstance> PeripheralState for State<'a, U, T> {
impl<'a, U: UarteInstance, T: TimerInstance> PeripheralState for StateInner<'a, U, T> {
type Interrupt = U::Interrupt;
fn on_interrupt(&mut self) {
trace!("irq: start");

64
embassy-stm32/src/eth/v2/mod.rs
View File

@ -1,10 +1,9 @@
use core::marker::PhantomData;
use core::pin::Pin;
use core::sync::atomic::{fence, Ordering};
use core::task::Waker;
use embassy::util::{AtomicWaker, Unborrow};
use embassy_hal_common::peripheral::{PeripheralMutex, PeripheralState};
use embassy_hal_common::peripheral::{PeripheralMutex, PeripheralState, StateStorage};
use embassy_hal_common::unborrow;
use embassy_net::{Device, DeviceCapabilities, LinkState, PacketBuf, MTU};
@ -19,8 +18,14 @@ mod descriptors;
use super::{StationManagement, PHY};
use descriptors::DescriptorRing;
pub struct State<'d, const TX: usize, const RX: usize>(StateStorage<Inner<'d, TX, RX>>);
impl<'d, const TX: usize, const RX: usize> State<'d, TX, RX> {
pub fn new() -> Self {
Self(StateStorage::new())
}
}
pub struct Ethernet<'d, P: PHY, const TX: usize, const RX: usize> {
state: PeripheralMutex<Inner<'d, TX, RX>>,
state: PeripheralMutex<'d, Inner<'d, TX, RX>>,
pins: [AnyPin; 9],
_phy: P,
clock_range: u8,
@ -30,6 +35,7 @@ pub struct Ethernet<'d, P: PHY, const TX: usize, const RX: usize> {
impl<'d, P: PHY, const TX: usize, const RX: usize> Ethernet<'d, P, TX, RX> {
pub fn new(
state: &'d mut State<'d, TX, RX>,
peri: impl Unborrow<Target = peripherals::ETH> + 'd,
interrupt: impl Unborrow<Target = crate::interrupt::ETH> + 'd,
ref_clk: impl Unborrow<Target = impl RefClkPin> + 'd,
@ -72,7 +78,7 @@ impl<'d, P: PHY, const TX: usize, const RX: usize> Ethernet<'d, P, TX, RX> {
tx_en.configure();
let inner = Inner::new(peri);
let state = PeripheralMutex::new(inner, interrupt);
let state = unsafe { PeripheralMutex::new_unchecked(&mut state.0, inner, interrupt) };
// NOTE(unsafe) We have exclusive access to the registers
unsafe {
@ -145,24 +151,16 @@ impl<'d, P: PHY, const TX: usize, const RX: usize> Ethernet<'d, P, TX, RX> {
tx_en.degrade(),
];
Self {
let mut this = Self {
state,
pins,
_phy: phy,
clock_range,
phy_addr,
mac_addr,
}
}
};
pub fn init(self: Pin<&mut Self>) {
// NOTE(unsafe) We won't move this
let this = unsafe { self.get_unchecked_mut() };
let mut mutex = unsafe { Pin::new_unchecked(&mut this.state) };
// SAFETY: The lifetime of `Inner` is only due to `PhantomData`; it isn't actually referencing any data with that lifetime.
unsafe { mutex.as_mut().register_interrupt_unchecked() }
mutex.with(|s| {
this.state.with(|s| {
s.desc_ring.init();
fence(Ordering::SeqCst);
@ -189,8 +187,10 @@ impl<'d, P: PHY, const TX: usize, const RX: usize> Ethernet<'d, P, TX, RX> {
});
}
});
P::phy_reset(this);
P::phy_init(this);
P::phy_reset(&mut this);
P::phy_init(&mut this);
this
}
}
@ -232,29 +232,17 @@ unsafe impl<'d, P: PHY, const TX: usize, const RX: usize> StationManagement
}
}
impl<'d, P: PHY, const TX: usize, const RX: usize> Device for Pin<&mut Ethernet<'d, P, TX, RX>> {
impl<'d, P: PHY, const TX: usize, const RX: usize> Device for Ethernet<'d, P, TX, RX> {
fn is_transmit_ready(&mut self) -> bool {
// NOTE(unsafe) We won't move out of self
let this = unsafe { self.as_mut().get_unchecked_mut() };
let mutex = unsafe { Pin::new_unchecked(&mut this.state) };
mutex.with(|s| s.desc_ring.tx.available())
self.state.with(|s| s.desc_ring.tx.available())
}
fn transmit(&mut self, pkt: PacketBuf) {
// NOTE(unsafe) We won't move out of self
let this = unsafe { self.as_mut().get_unchecked_mut() };
let mutex = unsafe { Pin::new_unchecked(&mut this.state) };
mutex.with(|s| unwrap!(s.desc_ring.tx.transmit(pkt)));
self.state.with(|s| unwrap!(s.desc_ring.tx.transmit(pkt)));
}
fn receive(&mut self) -> Option<PacketBuf> {
// NOTE(unsafe) We won't move out of self
let this = unsafe { self.as_mut().get_unchecked_mut() };
let mutex = unsafe { Pin::new_unchecked(&mut this.state) };
mutex.with(|s| s.desc_ring.rx.pop_packet())
self.state.with(|s| s.desc_ring.rx.pop_packet())
}
fn register_waker(&mut self, waker: &Waker) {
@ -269,10 +257,7 @@ impl<'d, P: PHY, const TX: usize, const RX: usize> Device for Pin<&mut Ethernet<
}
fn link_state(&mut self) -> LinkState {
// NOTE(unsafe) We won't move out of self
let this = unsafe { self.as_mut().get_unchecked_mut() };
if P::poll_link(this) {
if P::poll_link(self) {
LinkState::Up
} else {
LinkState::Down
@ -280,10 +265,7 @@ impl<'d, P: PHY, const TX: usize, const RX: usize> Device for Pin<&mut Ethernet<
}
fn ethernet_address(&mut self) -> [u8; 6] {
// NOTE(unsafe) We won't move out of self
let this = unsafe { self.as_mut().get_unchecked_mut() };
this.mac_addr
self.mac_addr
}
}

3
examples/nrf/src/bin/buffered_uart.rs
View File

@ -11,6 +11,7 @@ mod example_common;
use defmt::panic;
use embassy::executor::Spawner;
use embassy::io::{AsyncBufReadExt, AsyncWriteExt};
use embassy_nrf::buffered_uarte::State;
use embassy_nrf::gpio::NoPin;
use embassy_nrf::{buffered_uarte::BufferedUarte, interrupt, uarte, Peripherals};
use example_common::*;
@ -26,8 +27,10 @@ async fn main(_spawner: Spawner, p: Peripherals) {
let mut rx_buffer = [0u8; 4096];
let irq = interrupt::take!(UARTE0_UART0);
let mut state = State::new();
let u = unsafe {
BufferedUarte::new(
&mut state,
p.UARTE0,
p.TIMER0,
p.PPI_CH0,

18
examples/stm32h7/src/bin/eth.rs
View File

@ -6,7 +6,6 @@
#![feature(impl_trait_in_bindings)]
#![feature(type_alias_impl_trait)]
use core::pin::Pin;
use core::sync::atomic::{AtomicUsize, Ordering};
use cortex_m_rt::entry;
@ -22,7 +21,7 @@ use embassy_net::{
};
use embassy_stm32::clock::{Alarm, Clock};
use embassy_stm32::eth::lan8742a::LAN8742A;
use embassy_stm32::eth::Ethernet;
use embassy_stm32::eth::{Ethernet, State};
use embassy_stm32::rcc::{Config as RccConfig, Rcc};
use embassy_stm32::rng::Random;
use embassy_stm32::time::Hertz;
@ -42,7 +41,7 @@ defmt::timestamp! {"{=u64}", {
#[embassy::task]
async fn main_task(
device: &'static mut Pin<&'static mut Ethernet<'static, LAN8742A, 4, 4>>,
device: &'static mut Ethernet<'static, LAN8742A, 4, 4>,
config: &'static mut StaticConfigurator,
spawner: Spawner,
) {
@ -99,8 +98,8 @@ static mut RNG_INST: Option<Random<RNG>> = None;
static EXECUTOR: Forever<Executor> = Forever::new();
static TIMER_RTC: Forever<Clock<TIM2>> = Forever::new();
static ALARM: Forever<Alarm<TIM2>> = Forever::new();
static STATE: Forever<State<'static, 4, 4>> = Forever::new();
static ETH: Forever<Ethernet<'static, LAN8742A, 4, 4>> = Forever::new();
static DEVICE: Forever<Pin<&'static mut Ethernet<'static, LAN8742A, 4, 4>>> = Forever::new();
static CONFIG: Forever<StaticConfigurator> = Forever::new();
static NET_RESOURCES: Forever<StackResources<1, 2, 8>> = Forever::new();
@ -135,15 +134,12 @@ fn main() -> ! {
let eth_int = interrupt_take!(ETH);
let mac_addr = [0x10; 6];
let state = STATE.put(State::new());
let eth = ETH.put(Ethernet::new(
p.ETH, eth_int, p.PA1, p.PA2, p.PC1, p.PA7, p.PC4, p.PC5, p.PB12, p.PB13, p.PB11, LAN8742A,
mac_addr, 1,
state, p.ETH, eth_int, p.PA1, p.PA2, p.PC1, p.PA7, p.PC4, p.PC5, p.PB12, p.PB13, p.PB11,
LAN8742A, mac_addr, 1,
));
// NOTE(unsafe) This thing is a &'static
let net_device = DEVICE.put(unsafe { Pin::new_unchecked(eth) });
net_device.as_mut().init();
let config = StaticConfigurator::new(NetConfig {
address: Ipv4Cidr::new(Ipv4Address::new(192, 168, 0, 61), 24),
dns_servers: Vec::new(),
@ -156,6 +152,6 @@ fn main() -> ! {
executor.set_alarm(alarm);
executor.run(move |spawner| {
unwrap!(spawner.spawn(main_task(net_device, config, spawner)));
unwrap!(spawner.spawn(main_task(eth, config, spawner)));
})
}