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stm32: doc everything else.

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This commit is contained in:
Dario Nieuwenhuis 2023-12-19 18:03:20 +01:00
parent 189b15c426
commit c8c8b89104
12 changed files with 127 additions and 48 deletions
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18
embassy-stm32/src/dma/gpdma.rs
View File

@ -16,6 +16,7 @@ use crate::interrupt::Priority;
use crate::pac;
use crate::pac::gpdma::vals;
/// GPDMA transfer options.
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
#[non_exhaustive]
@ -113,10 +114,13 @@ pub(crate) unsafe fn on_irq_inner(dma: pac::gpdma::Gpdma, channel_num: usize, in
}
}
/// DMA request type alias. (also known as DMA channel number in some chips)
pub type Request = u8;
/// DMA channel.
#[cfg(dmamux)]
pub trait Channel: sealed::Channel + Peripheral<P = Self> + 'static + super::dmamux::MuxChannel {}
/// DMA channel.
#[cfg(not(dmamux))]
pub trait Channel: sealed::Channel + Peripheral<P = Self> + 'static {}
@ -131,12 +135,14 @@ pub(crate) mod sealed {
}
}
/// DMA transfer.
#[must_use = "futures do nothing unless you `.await` or poll them"]
pub struct Transfer<'a, C: Channel> {
channel: PeripheralRef<'a, C>,
}
impl<'a, C: Channel> Transfer<'a, C> {
/// Create a new read DMA transfer (peripheral to memory).
pub unsafe fn new_read<W: Word>(
channel: impl Peripheral<P = C> + 'a,
request: Request,
@ -147,6 +153,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
Self::new_read_raw(channel, request, peri_addr, buf, options)
}
/// Create a new read DMA transfer (peripheral to memory), using raw pointers.
pub unsafe fn new_read_raw<W: Word>(
channel: impl Peripheral<P = C> + 'a,
request: Request,
@ -172,6 +179,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
)
}
/// Create a new write DMA transfer (memory to peripheral).
pub unsafe fn new_write<W: Word>(
channel: impl Peripheral<P = C> + 'a,
request: Request,
@ -182,6 +190,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
Self::new_write_raw(channel, request, buf, peri_addr, options)
}
/// Create a new write DMA transfer (memory to peripheral), using raw pointers.
pub unsafe fn new_write_raw<W: Word>(
channel: impl Peripheral<P = C> + 'a,
request: Request,
@ -207,6 +216,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
)
}
/// Create a new write DMA transfer (memory to peripheral), writing the same value repeatedly.
pub unsafe fn new_write_repeated<W: Word>(
channel: impl Peripheral<P = C> + 'a,
request: Request,
@ -297,6 +307,9 @@ impl<'a, C: Channel> Transfer<'a, C> {
this
}
/// Request the transfer to stop.
///
/// This doesn't immediately stop the transfer, you have to wait until [`is_running`](Self::is_running) returns false.
pub fn request_stop(&mut self) {
let ch = self.channel.regs().ch(self.channel.num());
ch.cr().modify(|w| {
@ -304,6 +317,10 @@ impl<'a, C: Channel> Transfer<'a, C> {
})
}
/// Return whether this transfer is still running.
///
/// If this returns `false`, it can be because either the transfer finished, or
/// it was requested to stop early with [`request_stop`](Self::request_stop).
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().ch(self.channel.num());
let sr = ch.sr().read();
@ -317,6 +334,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
ch.br1().read().bndt()
}
/// Blocking wait until the transfer finishes.
pub fn blocking_wait(mut self) {
while self.is_running() {}

8
embassy-stm32/src/ipcc.rs
View File

@ -1,3 +1,5 @@
//! Inter-Process Communication Controller (IPCC)
use core::future::poll_fn;
use core::sync::atomic::{compiler_fence, Ordering};
use core::task::Poll;
@ -41,6 +43,7 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::IPCC_C1_RX> for Receive
}
}
/// TX interrupt handler.
pub struct TransmitInterruptHandler {}
impl interrupt::typelevel::Handler<interrupt::typelevel::IPCC_C1_TX> for TransmitInterruptHandler {
@ -72,6 +75,7 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::IPCC_C1_TX> for Transmi
}
}
/// IPCC config.
#[non_exhaustive]
#[derive(Clone, Copy, Default)]
pub struct Config {
@ -79,6 +83,8 @@ pub struct Config {
// reserved for future use
}
/// Channel.
#[allow(missing_docs)]
#[derive(Debug, Clone, Copy)]
#[repr(C)]
pub enum IpccChannel {
@ -90,9 +96,11 @@ pub enum IpccChannel {
Channel6 = 5,
}
/// IPCC driver.
pub struct Ipcc;
impl Ipcc {
/// Enable IPCC.
pub fn enable(_config: Config) {
IPCC::enable_and_reset();
IPCC::set_cpu2(true);

1
embassy-stm32/src/lib.rs
View File

@ -1,5 +1,6 @@
#![cfg_attr(not(test), no_std)]
#![allow(async_fn_in_trait)]
#![warn(missing_docs)]
//! ## Feature flags
#![doc = document_features::document_features!(feature_label = r#"<span class="stab portability"><code>{feature}</code></span>"#)]

106
embassy-stm32/src/low_power.rs
View File

@ -1,50 +1,53 @@
/// The STM32 line of microcontrollers support various deep-sleep modes which exploit clock-gating
/// to reduce power consumption. `embassy-stm32` provides a low-power executor, [`Executor`] which
/// can use knowledge of which peripherals are currently blocked upon to transparently and safely
/// enter such low-power modes (currently, only `STOP2`) when idle.
///
/// The executor determines which peripherals are active by their RCC state; consequently,
/// low-power states can only be entered if all peripherals have been `drop`'d. There are a few
/// exceptions to this rule:
///
/// * `GPIO`
/// * `RCC`
///
/// Since entering and leaving low-power modes typically incurs a significant latency, the
/// low-power executor will only attempt to enter when the next timer event is at least
/// [`time_driver::MIN_STOP_PAUSE`] in the future.
///
/// Currently there is no macro analogous to `embassy_executor::main` for this executor;
/// consequently one must define their entrypoint manually. Moveover, you must relinquish control
/// of the `RTC` peripheral to the executor. This will typically look like
///
/// ```rust,no_run
/// use embassy_executor::Spawner;
/// use embassy_stm32::low_power::Executor;
/// use embassy_stm32::rtc::{Rtc, RtcConfig};
/// use static_cell::make_static;
///
/// #[cortex_m_rt::entry]
/// fn main() -> ! {
/// Executor::take().run(|spawner| {
/// unwrap!(spawner.spawn(async_main(spawner)));
/// });
/// }
///
/// #[embassy_executor::task]
/// async fn async_main(spawner: Spawner) {
/// // initialize the platform...
/// let mut config = embassy_stm32::Config::default();
/// let p = embassy_stm32::init(config);
///
/// // give the RTC to the executor...
/// let mut rtc = Rtc::new(p.RTC, RtcConfig::default());
/// let rtc = make_static!(rtc);
/// embassy_stm32::low_power::stop_with_rtc(rtc);
///
/// // your application here...
/// }
/// ```
//! Low-power support.
//!
//! The STM32 line of microcontrollers support various deep-sleep modes which exploit clock-gating
//! to reduce power consumption. `embassy-stm32` provides a low-power executor, [`Executor`] which
//! can use knowledge of which peripherals are currently blocked upon to transparently and safely
//! enter such low-power modes (currently, only `STOP2`) when idle.
//!
//! The executor determines which peripherals are active by their RCC state; consequently,
//! low-power states can only be entered if all peripherals have been `drop`'d. There are a few
//! exceptions to this rule:
//!
//! * `GPIO`
//! * `RCC`
//!
//! Since entering and leaving low-power modes typically incurs a significant latency, the
//! low-power executor will only attempt to enter when the next timer event is at least
//! [`time_driver::MIN_STOP_PAUSE`] in the future.
//!
//! Currently there is no macro analogous to `embassy_executor::main` for this executor;
//! consequently one must define their entrypoint manually. Moveover, you must relinquish control
//! of the `RTC` peripheral to the executor. This will typically look like
//!
//! ```rust,no_run
//! use embassy_executor::Spawner;
//! use embassy_stm32::low_power::Executor;
//! use embassy_stm32::rtc::{Rtc, RtcConfig};
//! use static_cell::make_static;
//!
//! #[cortex_m_rt::entry]
//! fn main() -> ! {
//! Executor::take().run(|spawner| {
//! unwrap!(spawner.spawn(async_main(spawner)));
//! });
//! }
//!
//! #[embassy_executor::task]
//! async fn async_main(spawner: Spawner) {
//! // initialize the platform...
//! let mut config = embassy_stm32::Config::default();
//! let p = embassy_stm32::init(config);
//!
//! // give the RTC to the executor...
//! let mut rtc = Rtc::new(p.RTC, RtcConfig::default());
//! let rtc = make_static!(rtc);
//! embassy_stm32::low_power::stop_with_rtc(rtc);
//!
//! // your application here...
//! }
//! ```
use core::arch::asm;
use core::marker::PhantomData;
use core::sync::atomic::{compiler_fence, Ordering};
@ -64,6 +67,7 @@ static mut EXECUTOR: Option<Executor> = None;
foreach_interrupt! {
(RTC, rtc, $block:ident, WKUP, $irq:ident) => {
#[interrupt]
#[allow(non_snake_case)]
unsafe fn $irq() {
EXECUTOR.as_mut().unwrap().on_wakeup_irq();
}
@ -75,10 +79,15 @@ pub(crate) unsafe fn on_wakeup_irq() {
EXECUTOR.as_mut().unwrap().on_wakeup_irq();
}
/// Configure STOP mode with RTC.
pub fn stop_with_rtc(rtc: &'static Rtc) {
unsafe { EXECUTOR.as_mut().unwrap() }.stop_with_rtc(rtc)
}
/// Get whether the core is ready to enter the given stop mode.
///
/// This will return false if some peripheral driver is in use that
/// prevents entering the given stop mode.
pub fn stop_ready(stop_mode: StopMode) -> bool {
match unsafe { EXECUTOR.as_mut().unwrap() }.stop_mode() {
Some(StopMode::Stop2) => true,
@ -87,10 +96,13 @@ pub fn stop_ready(stop_mode: StopMode) -> bool {
}
}
/// Available stop modes.
#[non_exhaustive]
#[derive(PartialEq)]
pub enum StopMode {
/// STOP 1
Stop1,
/// STOP 2
Stop2,
}

9
embassy-stm32/src/opamp.rs
View File

@ -1,9 +1,12 @@
//! Operational Amplifier (OPAMP)
#![macro_use]
use embassy_hal_internal::{into_ref, PeripheralRef};
use crate::Peripheral;
/// Gain
#[allow(missing_docs)]
#[derive(Clone, Copy)]
pub enum OpAmpGain {
Mul1,
@ -13,6 +16,8 @@ pub enum OpAmpGain {
Mul16,
}
/// Speed
#[allow(missing_docs)]
#[derive(Clone, Copy)]
pub enum OpAmpSpeed {
Normal,
@ -180,6 +185,7 @@ impl<'d, T: Instance> Drop for OpAmpInternalOutput<'d, T> {
}
}
/// Opamp instance trait.
pub trait Instance: sealed::Instance + 'static {}
pub(crate) mod sealed {
@ -198,8 +204,11 @@ pub(crate) mod sealed {
pub trait OutputPin<T: Instance> {}
}
/// Non-inverting pin trait.
pub trait NonInvertingPin<T: Instance>: sealed::NonInvertingPin<T> {}
/// Inverting pin trait.
pub trait InvertingPin<T: Instance>: sealed::InvertingPin<T> {}
/// Output pin trait.
pub trait OutputPin<T: Instance>: sealed::OutputPin<T> {}
macro_rules! impl_opamp_external_output {

1
embassy-stm32/src/rng.rs
View File

@ -80,6 +80,7 @@ impl<'d, T: Instance> Rng<'d, T> {
let _ = self.next_u32();
}
/// Reset the RNG.
#[cfg(not(rng_v1))]
pub fn reset(&mut self) {
T::regs().cr().write(|reg| {

2
embassy-stm32/src/sdmmc/mod.rs
View File

@ -293,6 +293,7 @@ pub struct Sdmmc<'d, T: Instance, Dma: SdmmcDma<T> = NoDma> {
#[cfg(sdmmc_v1)]
impl<'d, T: Instance, Dma: SdmmcDma<T>> Sdmmc<'d, T, Dma> {
/// Create a new SDMMC driver, with 1 data lane.
pub fn new_1bit(
sdmmc: impl Peripheral<P = T> + 'd,
_irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
@ -327,6 +328,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T>> Sdmmc<'d, T, Dma> {
)
}
/// Create a new SDMMC driver, with 4 data lanes.
pub fn new_4bit(
sdmmc: impl Peripheral<P = T> + 'd,
_irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,

4
embassy-stm32/src/usb/mod.rs
View File

@ -1,3 +1,5 @@
//! Universal Serial Bus (USB)
use crate::interrupt;
use crate::rcc::RccPeripheral;
@ -10,7 +12,9 @@ pub(crate) mod sealed {
}
}
/// USB instance trait.
pub trait Instance: sealed::Instance + RccPeripheral + 'static {
/// Interrupt for this USB instance.
type Interrupt: interrupt::typelevel::Interrupt;
}

7
embassy-stm32/src/usb/usb.rs
View File

@ -244,6 +244,7 @@ struct EndpointData {
used_out: bool,
}
/// USB driver.
pub struct Driver<'d, T: Instance> {
phantom: PhantomData<&'d mut T>,
alloc: [EndpointData; EP_COUNT],
@ -251,6 +252,7 @@ pub struct Driver<'d, T: Instance> {
}
impl<'d, T: Instance> Driver<'d, T> {
/// Create a new USB driver.
pub fn new(
_usb: impl Peripheral<P = T> + 'd,
_irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
@ -465,6 +467,7 @@ impl<'d, T: Instance> driver::Driver<'d> for Driver<'d, T> {
}
}
/// USB bus.
pub struct Bus<'d, T: Instance> {
phantom: PhantomData<&'d mut T>,
ep_types: [EpType; EP_COUNT - 1],
@ -640,6 +643,7 @@ trait Dir {
fn waker(i: usize) -> &'static AtomicWaker;
}
/// Marker type for the "IN" direction.
pub enum In {}
impl Dir for In {
fn dir() -> Direction {
@ -652,6 +656,7 @@ impl Dir for In {
}
}
/// Marker type for the "OUT" direction.
pub enum Out {}
impl Dir for Out {
fn dir() -> Direction {
@ -664,6 +669,7 @@ impl Dir for Out {
}
}
/// USB endpoint.
pub struct Endpoint<'d, T: Instance, D> {
_phantom: PhantomData<(&'d mut T, D)>,
info: EndpointInfo,
@ -813,6 +819,7 @@ impl<'d, T: Instance> driver::EndpointIn for Endpoint<'d, T, In> {
}
}
/// USB control pipe.
pub struct ControlPipe<'d, T: Instance> {
_phantom: PhantomData<&'d mut T>,
max_packet_size: u16,

2
embassy-stm32/src/usb_otg/mod.rs
View File

@ -20,7 +20,9 @@ pub(crate) mod sealed {
}
}
/// USB OTG instance.
pub trait Instance: sealed::Instance + RccPeripheral {
/// Interrupt for this USB OTG instance.
type Interrupt: interrupt::typelevel::Interrupt;
}

13
embassy-stm32/src/usb_otg/usb.rs
View File

@ -204,6 +204,7 @@ pub enum PhyType {
}
impl PhyType {
/// Get whether this PHY is any of the internal types.
pub fn internal(&self) -> bool {
match self {
PhyType::InternalFullSpeed | PhyType::InternalHighSpeed => true,
@ -211,6 +212,7 @@ impl PhyType {
}
}
/// Get whether this PHY is any of the high-speed types.
pub fn high_speed(&self) -> bool {
match self {
PhyType::InternalFullSpeed => false,
@ -218,7 +220,7 @@ impl PhyType {
}
}
pub fn to_dspd(&self) -> vals::Dspd {
fn to_dspd(&self) -> vals::Dspd {
match self {
PhyType::InternalFullSpeed => vals::Dspd::FULL_SPEED_INTERNAL,
PhyType::InternalHighSpeed => vals::Dspd::HIGH_SPEED,
@ -230,6 +232,7 @@ impl PhyType {
/// Indicates that [State::ep_out_buffers] is empty.
const EP_OUT_BUFFER_EMPTY: u16 = u16::MAX;
/// USB OTG driver state.
pub struct State<const EP_COUNT: usize> {
/// Holds received SETUP packets. Available if [State::ep0_setup_ready] is true.
ep0_setup_data: UnsafeCell<[u8; 8]>,
@ -247,6 +250,7 @@ unsafe impl<const EP_COUNT: usize> Send for State<EP_COUNT> {}
unsafe impl<const EP_COUNT: usize> Sync for State<EP_COUNT> {}
impl<const EP_COUNT: usize> State<EP_COUNT> {
/// Create a new State.
pub const fn new() -> Self {
const NEW_AW: AtomicWaker = AtomicWaker::new();
const NEW_BUF: UnsafeCell<*mut u8> = UnsafeCell::new(0 as _);
@ -271,6 +275,7 @@ struct EndpointData {
fifo_size_words: u16,
}
/// USB driver config.
#[non_exhaustive]
#[derive(Clone, Copy, PartialEq, Eq, Debug)]
pub struct Config {
@ -297,6 +302,7 @@ impl Default for Config {
}
}
/// USB driver.
pub struct Driver<'d, T: Instance> {
config: Config,
phantom: PhantomData<&'d mut T>,
@ -527,6 +533,7 @@ impl<'d, T: Instance> embassy_usb_driver::Driver<'d> for Driver<'d, T> {
}
}
/// USB bus.
pub struct Bus<'d, T: Instance> {
config: Config,
phantom: PhantomData<&'d mut T>,
@ -1092,6 +1099,7 @@ trait Dir {
fn dir() -> Direction;
}
/// Marker type for the "IN" direction.
pub enum In {}
impl Dir for In {
fn dir() -> Direction {
@ -1099,6 +1107,7 @@ impl Dir for In {
}
}
/// Marker type for the "OUT" direction.
pub enum Out {}
impl Dir for Out {
fn dir() -> Direction {
@ -1106,6 +1115,7 @@ impl Dir for Out {
}
}
/// USB endpoint.
pub struct Endpoint<'d, T: Instance, D> {
_phantom: PhantomData<(&'d mut T, D)>,
info: EndpointInfo,
@ -1299,6 +1309,7 @@ impl<'d, T: Instance> embassy_usb_driver::EndpointIn for Endpoint<'d, T, In> {
}
}
/// USB control pipe.
pub struct ControlPipe<'d, T: Instance> {
_phantom: PhantomData<&'d mut T>,
max_packet_size: u16,

4
embassy-stm32/src/wdg/mod.rs
View File

@ -6,6 +6,7 @@ use stm32_metapac::iwdg::vals::{Key, Pr};
use crate::rcc::LSI_FREQ;
/// Independent watchdog (IWDG) driver.
pub struct IndependentWatchdog<'d, T: Instance> {
wdg: PhantomData<&'d mut T>,
}
@ -64,10 +65,12 @@ impl<'d, T: Instance> IndependentWatchdog<'d, T> {
IndependentWatchdog { wdg: PhantomData }
}
/// Unleash (start) the watchdog.
pub fn unleash(&mut self) {
T::regs().kr().write(|w| w.set_key(Key::START));
}
/// Pet (reload, refresh) the watchdog.
pub fn pet(&mut self) {
T::regs().kr().write(|w| w.set_key(Key::RESET));
}
@ -79,6 +82,7 @@ mod sealed {
}
}
/// IWDG instance trait.
pub trait Instance: sealed::Instance {}
foreach_peripheral!(