diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index f17c6bef6..e615c6307 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -653,9 +653,9 @@ fn main() {
crate::pac::RCC.#en_reg().modify(|w| w.#set_en_field(false));
#decr_stop_refcount
}
- fn enable_bit() -> crate::rcc::ClockEnableBit {
- unsafe { crate::rcc::ClockEnableBit::new(#en_reg_offs, #en_bit_offs) }
- }
+
+ const ENABLE_BIT: crate::rcc::ClockEnableBit =
+ unsafe { crate::rcc::ClockEnableBit::new(#en_reg_offs, #en_bit_offs) };
}
impl crate::rcc::RccPeripheral for peripherals::#pname {}
diff --git a/embassy-stm32/src/i2c/mod.rs b/embassy-stm32/src/i2c/mod.rs
index 0b2a56305..ef5fd0972 100644
--- a/embassy-stm32/src/i2c/mod.rs
+++ b/embassy-stm32/src/i2c/mod.rs
@@ -9,7 +9,7 @@ use core::future::Future;
use core::iter;
use core::marker::PhantomData;
-use embassy_hal_internal::{into_ref, Peripheral, PeripheralRef};
+use embassy_hal_internal::{into_ref, Peripheral};
use embassy_sync::waitqueue::AtomicWaker;
#[cfg(feature = "time")]
use embassy_time::{Duration, Instant};
@@ -18,6 +18,7 @@ use crate::dma::ChannelAndRequest;
use crate::gpio::{AFType, Pull};
use crate::interrupt::typelevel::Interrupt;
use crate::mode::{Async, Blocking, Mode};
+use crate::rcc::{ClockEnableBit, SealedRccPeripheral};
use crate::time::Hertz;
use crate::{interrupt, peripherals};
@@ -72,8 +73,10 @@ impl Default for Config {
}
/// I2C driver.
-pub struct I2c<'d, T: Instance, M: Mode> {
- _peri: PeripheralRef<'d, T>,
+pub struct I2c<'d, M: Mode> {
+ info: &'static Info,
+ state: &'static State,
+ kernel_clock: Hertz,
tx_dma: Option<ChannelAndRequest<'d>>,
rx_dma: Option<ChannelAndRequest<'d>>,
#[cfg(feature = "time")]
@@ -81,9 +84,9 @@ pub struct I2c<'d, T: Instance, M: Mode> {
_phantom: PhantomData<M>,
}
-impl<'d, T: Instance> I2c<'d, T, Async> {
+impl<'d> I2c<'d, Async> {
/// Create a new I2C driver.
- pub fn new(
+ pub fn new<T: Instance>(
peri: impl Peripheral<P = T> + 'd,
scl: impl Peripheral<P = impl SclPin<T>> + 'd,
sda: impl Peripheral<P = impl SdaPin<T>> + 'd,
@@ -99,9 +102,9 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
}
}
-impl<'d, T: Instance> I2c<'d, T, Blocking> {
+impl<'d> I2c<'d, Blocking> {
/// Create a new blocking I2C driver.
- pub fn new_blocking(
+ pub fn new_blocking<T: Instance>(
peri: impl Peripheral<P = T> + 'd,
scl: impl Peripheral<P = impl SclPin<T>> + 'd,
sda: impl Peripheral<P = impl SdaPin<T>> + 'd,
@@ -112,10 +115,10 @@ impl<'d, T: Instance> I2c<'d, T, Blocking> {
}
}
-impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
+impl<'d, M: Mode> I2c<'d, M> {
/// Create a new I2C driver.
- fn new_inner(
- peri: impl Peripheral<P = T> + 'd,
+ fn new_inner<T: Instance>(
+ _peri: impl Peripheral<P = T> + 'd,
scl: impl Peripheral<P = impl SclPin<T>> + 'd,
sda: impl Peripheral<P = impl SdaPin<T>> + 'd,
tx_dma: Option<ChannelAndRequest<'d>>,
@@ -123,7 +126,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
freq: Hertz,
config: Config,
) -> Self {
- into_ref!(peri, scl, sda);
+ into_ref!(scl, sda);
T::enable_and_reset();
@@ -148,7 +151,9 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
unsafe { T::ErrorInterrupt::enable() };
let mut this = Self {
- _peri: peri,
+ info: T::info(),
+ state: T::state(),
+ kernel_clock: T::frequency(),
tx_dma,
rx_dma,
#[cfg(feature = "time")]
@@ -217,19 +222,14 @@ impl State {
}
}
-trait SealedInstance: crate::rcc::RccPeripheral {
- fn regs() -> crate::pac::i2c::I2c;
- fn state() -> &'static State;
+struct Info {
+ regs: crate::pac::i2c::I2c,
+ pub(crate) enable_bit: ClockEnableBit,
}
-/// I2C peripheral instance
-#[allow(private_bounds)]
-pub trait Instance: SealedInstance + 'static {
- /// Event interrupt for this instance
- type EventInterrupt: interrupt::typelevel::Interrupt;
- /// Error interrupt for this instance
- type ErrorInterrupt: interrupt::typelevel::Interrupt;
-}
+peri_trait!(
+ irqs: [EventInterrupt, ErrorInterrupt],
+);
pin_trait!(SclPin, Instance);
pin_trait!(SdaPin, Instance);
@@ -260,11 +260,15 @@ impl<T: Instance> interrupt::typelevel::Handler<T::ErrorInterrupt> for ErrorInte
foreach_peripheral!(
(i2c, $inst:ident) => {
+ #[allow(private_interfaces)]
impl SealedInstance for peripherals::$inst {
- fn regs() -> crate::pac::i2c::I2c {
- crate::pac::$inst
+ fn info() -> &'static Info {
+ static INFO: Info = Info{
+ regs: crate::pac::$inst,
+ enable_bit: crate::peripherals::$inst::ENABLE_BIT,
+ };
+ &INFO
}
-
fn state() -> &'static State {
static STATE: State = State::new();
&STATE
@@ -278,7 +282,7 @@ foreach_peripheral!(
};
);
-impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::i2c::Read for I2c<'d, T, M> {
+impl<'d, M: Mode> embedded_hal_02::blocking::i2c::Read for I2c<'d, M> {
type Error = Error;
fn read(&mut self, address: u8, buffer: &mut [u8]) -> Result<(), Self::Error> {
@@ -286,7 +290,7 @@ impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::i2c::Read for I2c<'d,
}
}
-impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::i2c::Write for I2c<'d, T, M> {
+impl<'d, M: Mode> embedded_hal_02::blocking::i2c::Write for I2c<'d, M> {
type Error = Error;
fn write(&mut self, address: u8, write: &[u8]) -> Result<(), Self::Error> {
@@ -294,7 +298,7 @@ impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::i2c::Write for I2c<'d,
}
}
-impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::i2c::WriteRead for I2c<'d, T, M> {
+impl<'d, M: Mode> embedded_hal_02::blocking::i2c::WriteRead for I2c<'d, M> {
type Error = Error;
fn write_read(&mut self, address: u8, write: &[u8], read: &mut [u8]) -> Result<(), Self::Error> {
@@ -318,11 +322,11 @@ impl embedded_hal_1::i2c::Error for Error {
}
}
-impl<'d, T: Instance, M: Mode> embedded_hal_1::i2c::ErrorType for I2c<'d, T, M> {
+impl<'d, M: Mode> embedded_hal_1::i2c::ErrorType for I2c<'d, M> {
type Error = Error;
}
-impl<'d, T: Instance, M: Mode> embedded_hal_1::i2c::I2c for I2c<'d, T, M> {
+impl<'d, M: Mode> embedded_hal_1::i2c::I2c for I2c<'d, M> {
fn read(&mut self, address: u8, read: &mut [u8]) -> Result<(), Self::Error> {
self.blocking_read(address, read)
}
@@ -344,7 +348,7 @@ impl<'d, T: Instance, M: Mode> embedded_hal_1::i2c::I2c for I2c<'d, T, M> {
}
}
-impl<'d, T: Instance> embedded_hal_async::i2c::I2c for I2c<'d, T, Async> {
+impl<'d> embedded_hal_async::i2c::I2c for I2c<'d, Async> {
async fn read(&mut self, address: u8, read: &mut [u8]) -> Result<(), Self::Error> {
self.read(address, read).await
}
diff --git a/embassy-stm32/src/i2c/v1.rs b/embassy-stm32/src/i2c/v1.rs
index ac4fa1b9e..0269e53aa 100644
--- a/embassy-stm32/src/i2c/v1.rs
+++ b/embassy-stm32/src/i2c/v1.rs
@@ -28,7 +28,7 @@ use crate::pac::i2c;
// There's some more details there, and we might have a fix for you. But please let us know if you
// hit a case like this!
pub unsafe fn on_interrupt<T: Instance>() {
- let regs = T::regs();
+ let regs = T::info().regs;
// i2c v2 only woke the task on transfer complete interrupts. v1 uses interrupts for a bunch of
// other stuff, so we wake the task on every interrupt.
T::state().waker.wake();
@@ -41,9 +41,9 @@ pub unsafe fn on_interrupt<T: Instance>() {
});
}
-impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
+impl<'d, M: PeriMode> I2c<'d, M> {
pub(crate) fn init(&mut self, freq: Hertz, _config: Config) {
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_pe(false);
//reg.set_anfoff(false);
});
@@ -67,39 +67,39 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
//
// This presents as an ~infinite hang on read or write, as the START condition
// is never generated, meaning the start event is never generated.
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_swrst(true);
});
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_swrst(false);
});
- let timings = Timings::new(T::frequency(), freq);
+ let timings = Timings::new(self.kernel_clock, freq);
- T::regs().cr2().modify(|reg| {
+ self.info.regs.cr2().modify(|reg| {
reg.set_freq(timings.freq);
});
- T::regs().ccr().modify(|reg| {
+ self.info.regs.ccr().modify(|reg| {
reg.set_f_s(timings.mode.f_s());
reg.set_duty(timings.duty.duty());
reg.set_ccr(timings.ccr);
});
- T::regs().trise().modify(|reg| {
+ self.info.regs.trise().modify(|reg| {
reg.set_trise(timings.trise);
});
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_pe(true);
});
}
- fn check_and_clear_error_flags() -> Result<i2c::regs::Sr1, Error> {
+ fn check_and_clear_error_flags(info: &'static Info) -> Result<i2c::regs::Sr1, Error> {
// Note that flags should only be cleared once they have been registered. If flags are
// cleared otherwise, there may be an inherent race condition and flags may be missed.
- let sr1 = T::regs().sr1().read();
+ let sr1 = info.regs.sr1().read();
if sr1.timeout() {
- T::regs().sr1().write(|reg| {
+ info.regs.sr1().write(|reg| {
reg.0 = !0;
reg.set_timeout(false);
});
@@ -107,7 +107,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
}
if sr1.pecerr() {
- T::regs().sr1().write(|reg| {
+ info.regs.sr1().write(|reg| {
reg.0 = !0;
reg.set_pecerr(false);
});
@@ -115,7 +115,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
}
if sr1.ovr() {
- T::regs().sr1().write(|reg| {
+ info.regs.sr1().write(|reg| {
reg.0 = !0;
reg.set_ovr(false);
});
@@ -123,7 +123,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
}
if sr1.af() {
- T::regs().sr1().write(|reg| {
+ info.regs.sr1().write(|reg| {
reg.0 = !0;
reg.set_af(false);
});
@@ -131,7 +131,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
}
if sr1.arlo() {
- T::regs().sr1().write(|reg| {
+ info.regs.sr1().write(|reg| {
reg.0 = !0;
reg.set_arlo(false);
});
@@ -141,7 +141,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
// The errata indicates that BERR may be incorrectly detected. It recommends ignoring and
// clearing the BERR bit instead.
if sr1.berr() {
- T::regs().sr1().write(|reg| {
+ info.regs.sr1().write(|reg| {
reg.0 = !0;
reg.set_berr(false);
});
@@ -154,32 +154,32 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
if frame.send_start() {
// Send a START condition
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_start(true);
});
// Wait until START condition was generated
- while !Self::check_and_clear_error_flags()?.start() {
+ while !Self::check_and_clear_error_flags(self.info)?.start() {
timeout.check()?;
}
// Check if we were the ones to generate START
- if T::regs().cr1().read().start() || !T::regs().sr2().read().msl() {
+ if self.info.regs.cr1().read().start() || !self.info.regs.sr2().read().msl() {
return Err(Error::Arbitration);
}
// Set up current address we're trying to talk to
- T::regs().dr().write(|reg| reg.set_dr(addr << 1));
+ self.info.regs.dr().write(|reg| reg.set_dr(addr << 1));
// Wait until address was sent
// Wait for the address to be acknowledged
// Check for any I2C errors. If a NACK occurs, the ADDR bit will never be set.
- while !Self::check_and_clear_error_flags()?.addr() {
+ while !Self::check_and_clear_error_flags(self.info)?.addr() {
timeout.check()?;
}
// Clear condition by reading SR2
- let _ = T::regs().sr2().read();
+ let _ = self.info.regs.sr2().read();
}
// Send bytes
@@ -189,7 +189,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
if frame.send_stop() {
// Send a STOP condition
- T::regs().cr1().modify(|reg| reg.set_stop(true));
+ self.info.regs.cr1().modify(|reg| reg.set_stop(true));
}
// Fallthrough is success
@@ -200,18 +200,18 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
// Wait until we're ready for sending
while {
// Check for any I2C errors. If a NACK occurs, the ADDR bit will never be set.
- !Self::check_and_clear_error_flags()?.txe()
+ !Self::check_and_clear_error_flags(self.info)?.txe()
} {
timeout.check()?;
}
// Push out a byte of data
- T::regs().dr().write(|reg| reg.set_dr(byte));
+ self.info.regs.dr().write(|reg| reg.set_dr(byte));
// Wait until byte is transferred
while {
// Check for any potential error conditions.
- !Self::check_and_clear_error_flags()?.btf()
+ !Self::check_and_clear_error_flags(self.info)?.btf()
} {
timeout.check()?;
}
@@ -222,14 +222,14 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
fn recv_byte(&self, timeout: Timeout) -> Result<u8, Error> {
while {
// Check for any potential error conditions.
- Self::check_and_clear_error_flags()?;
+ Self::check_and_clear_error_flags(self.info)?;
- !T::regs().sr1().read().rxne()
+ !self.info.regs.sr1().read().rxne()
} {
timeout.check()?;
}
- let value = T::regs().dr().read().dr();
+ let value = self.info.regs.dr().read().dr();
Ok(value)
}
@@ -246,32 +246,32 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
if frame.send_start() {
// Send a START condition and set ACK bit
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_start(true);
reg.set_ack(true);
});
// Wait until START condition was generated
- while !Self::check_and_clear_error_flags()?.start() {
+ while !Self::check_and_clear_error_flags(self.info)?.start() {
timeout.check()?;
}
// Check if we were the ones to generate START
- if T::regs().cr1().read().start() || !T::regs().sr2().read().msl() {
+ if self.info.regs.cr1().read().start() || !self.info.regs.sr2().read().msl() {
return Err(Error::Arbitration);
}
// Set up current address we're trying to talk to
- T::regs().dr().write(|reg| reg.set_dr((addr << 1) + 1));
+ self.info.regs.dr().write(|reg| reg.set_dr((addr << 1) + 1));
// Wait until address was sent
// Wait for the address to be acknowledged
- while !Self::check_and_clear_error_flags()?.addr() {
+ while !Self::check_and_clear_error_flags(self.info)?.addr() {
timeout.check()?;
}
// Clear condition by reading SR2
- let _ = T::regs().sr2().read();
+ let _ = self.info.regs.sr2().read();
}
// Receive bytes into buffer
@@ -280,7 +280,7 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
}
// Prepare to send NACK then STOP after next byte
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
if frame.send_nack() {
reg.set_ack(false);
}
@@ -346,17 +346,17 @@ impl<'d, T: Instance, M: PeriMode> I2c<'d, T, M> {
// Async
#[inline] // pretty sure this should always be inlined
- fn enable_interrupts() -> () {
- T::regs().cr2().modify(|w| {
+ fn enable_interrupts(info: &'static Info) -> () {
+ info.regs.cr2().modify(|w| {
w.set_iterren(true);
w.set_itevten(true);
});
}
}
-impl<'d, T: Instance> I2c<'d, T, Async> {
+impl<'d> I2c<'d, Async> {
async fn write_frame(&mut self, address: u8, write: &[u8], frame: FrameOptions) -> Result<(), Error> {
- T::regs().cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
// Note: Do not enable the ITBUFEN bit in the I2C_CR2 register if DMA is used for
// reception.
w.set_itbufen(false);
@@ -370,33 +370,31 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
// Sentinel to disable transfer when an error occurs or future is canceled.
// TODO: Generate STOP condition on cancel?
let on_drop = OnDrop::new(|| {
- T::regs().cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
w.set_dmaen(false);
w.set_iterren(false);
w.set_itevten(false);
})
});
- let state = T::state();
-
if frame.send_start() {
// Send a START condition
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_start(true);
});
// Wait until START condition was generated
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err(e)),
Ok(sr1) => {
if sr1.start() {
Poll::Ready(Ok(()))
} else {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -405,25 +403,25 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
.await?;
// Check if we were the ones to generate START
- if T::regs().cr1().read().start() || !T::regs().sr2().read().msl() {
+ if self.info.regs.cr1().read().start() || !self.info.regs.sr2().read().msl() {
return Err(Error::Arbitration);
}
// Set up current address we're trying to talk to
- T::regs().dr().write(|reg| reg.set_dr(address << 1));
+ self.info.regs.dr().write(|reg| reg.set_dr(address << 1));
// Wait for the address to be acknowledged
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err(e)),
Ok(sr1) => {
if sr1.addr() {
Poll::Ready(Ok(()))
} else {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -432,26 +430,26 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
.await?;
// Clear condition by reading SR2
- T::regs().sr2().read();
+ self.info.regs.sr2().read();
}
let dma_transfer = unsafe {
// Set the I2C_DR register address in the DMA_SxPAR register. The data will be moved to
// this address from the memory after each TxE event.
- let dst = T::regs().dr().as_ptr() as *mut u8;
+ let dst = self.info.regs.dr().as_ptr() as *mut u8;
self.tx_dma.as_mut().unwrap().write(write, dst, Default::default())
};
// Wait for bytes to be sent, or an error to occur.
let poll_error = poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err::<(), Error>(e)),
Ok(_) => {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -463,7 +461,7 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
_ => Ok(()),
}?;
- T::regs().cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
w.set_dmaen(false);
});
@@ -473,16 +471,16 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
// 18.3.8 “Master transmitter: In the interrupt routine after the EOT interrupt, disable DMA
// requests then wait for a BTF event before programming the Stop condition.”
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err(e)),
Ok(sr1) => {
if sr1.btf() {
Poll::Ready(Ok(()))
} else {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -490,7 +488,7 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
})
.await?;
- T::regs().cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_stop(true);
});
}
@@ -525,7 +523,7 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
// Some branches below depend on whether the buffer contains only a single byte.
let single_byte = buffer.len() == 1;
- T::regs().cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
// Note: Do not enable the ITBUFEN bit in the I2C_CR2 register if DMA is used for
// reception.
w.set_itbufen(false);
@@ -541,34 +539,32 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
// Sentinel to disable transfer when an error occurs or future is canceled.
// TODO: Generate STOP condition on cancel?
let on_drop = OnDrop::new(|| {
- T::regs().cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
w.set_dmaen(false);
w.set_iterren(false);
w.set_itevten(false);
})
});
- let state = T::state();
-
if frame.send_start() {
// Send a START condition and set ACK bit
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_start(true);
reg.set_ack(true);
});
// Wait until START condition was generated
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err(e)),
Ok(sr1) => {
if sr1.start() {
Poll::Ready(Ok(()))
} else {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -577,25 +573,25 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
.await?;
// Check if we were the ones to generate START
- if T::regs().cr1().read().start() || !T::regs().sr2().read().msl() {
+ if self.info.regs.cr1().read().start() || !self.info.regs.sr2().read().msl() {
return Err(Error::Arbitration);
}
// Set up current address we're trying to talk to
- T::regs().dr().write(|reg| reg.set_dr((address << 1) + 1));
+ self.info.regs.dr().write(|reg| reg.set_dr((address << 1) + 1));
// Wait for the address to be acknowledged
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err(e)),
Ok(sr1) => {
if sr1.addr() {
Poll::Ready(Ok(()))
} else {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -606,18 +602,18 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
// 18.3.8: When a single byte must be received: the NACK must be programmed during EV6
// event, i.e. program ACK=0 when ADDR=1, before clearing ADDR flag.
if frame.send_nack() && single_byte {
- T::regs().cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_ack(false);
});
}
// Clear condition by reading SR2
- T::regs().sr2().read();
+ self.info.regs.sr2().read();
} else {
// Before starting reception of single byte (but without START condition, i.e. in case
// of continued frame), program NACK to emit at end of this byte.
if frame.send_nack() && single_byte {
- T::regs().cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_ack(false);
});
}
@@ -627,7 +623,7 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
// condition either after clearing ADDR flag, or in the DMA Transfer Complete interrupt
// routine.
if frame.send_stop() && single_byte {
- T::regs().cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_stop(true);
});
}
@@ -635,20 +631,20 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
let dma_transfer = unsafe {
// Set the I2C_DR register address in the DMA_SxPAR register. The data will be moved
// from this address from the memory after each RxE event.
- let src = T::regs().dr().as_ptr() as *mut u8;
+ let src = self.info.regs.dr().as_ptr() as *mut u8;
self.rx_dma.as_mut().unwrap().read(src, buffer, Default::default())
};
// Wait for bytes to be received, or an error to occur.
let poll_error = poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- match Self::check_and_clear_error_flags() {
+ match Self::check_and_clear_error_flags(self.info) {
Err(e) => Poll::Ready(Err::<(), Error>(e)),
_ => {
// When pending, (re-)enable interrupts to wake us up.
- Self::enable_interrupts();
+ Self::enable_interrupts(self.info);
Poll::Pending
}
}
@@ -659,12 +655,12 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
_ => Ok(()),
}?;
- T::regs().cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
w.set_dmaen(false);
});
if frame.send_stop() && !single_byte {
- T::regs().cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_stop(true);
});
}
@@ -704,9 +700,9 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
}
}
-impl<'d, T: Instance, M: PeriMode> Drop for I2c<'d, T, M> {
+impl<'d, M: PeriMode> Drop for I2c<'d, M> {
fn drop(&mut self) {
- T::disable();
+ self.info.enable_bit.disable()
}
}
@@ -810,20 +806,20 @@ impl Timings {
}
}
-impl<'d, T: Instance, M: PeriMode> SetConfig for I2c<'d, T, M> {
+impl<'d, M: PeriMode> SetConfig for I2c<'d, M> {
type Config = Hertz;
type ConfigError = ();
fn set_config(&mut self, config: &Self::Config) -> Result<(), ()> {
- let timings = Timings::new(T::frequency(), *config);
- T::regs().cr2().modify(|reg| {
+ let timings = Timings::new(self.kernel_clock, *config);
+ self.info.regs.cr2().modify(|reg| {
reg.set_freq(timings.freq);
});
- T::regs().ccr().modify(|reg| {
+ self.info.regs.ccr().modify(|reg| {
reg.set_f_s(timings.mode.f_s());
reg.set_duty(timings.duty.duty());
reg.set_ccr(timings.ccr);
});
- T::regs().trise().modify(|reg| {
+ self.info.regs.trise().modify(|reg| {
reg.set_trise(timings.trise);
});
diff --git a/embassy-stm32/src/i2c/v2.rs b/embassy-stm32/src/i2c/v2.rs
index 12df98534..aa6daf786 100644
--- a/embassy-stm32/src/i2c/v2.rs
+++ b/embassy-stm32/src/i2c/v2.rs
@@ -10,7 +10,7 @@ use super::*;
use crate::pac::i2c;
pub(crate) unsafe fn on_interrupt<T: Instance>() {
- let regs = T::regs();
+ let regs = T::info().regs;
let isr = regs.isr().read();
if isr.tcr() || isr.tc() {
@@ -23,16 +23,16 @@ pub(crate) unsafe fn on_interrupt<T: Instance>() {
});
}
-impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
+impl<'d, M: Mode> I2c<'d, M> {
pub(crate) fn init(&mut self, freq: Hertz, _config: Config) {
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_pe(false);
reg.set_anfoff(false);
});
- let timings = Timings::new(T::frequency(), freq.into());
+ let timings = Timings::new(self.kernel_clock, freq.into());
- T::regs().timingr().write(|reg| {
+ self.info.regs.timingr().write(|reg| {
reg.set_presc(timings.prescale);
reg.set_scll(timings.scll);
reg.set_sclh(timings.sclh);
@@ -40,16 +40,17 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
reg.set_scldel(timings.scldel);
});
- T::regs().cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_pe(true);
});
}
fn master_stop(&mut self) {
- T::regs().cr2().write(|w| w.set_stop(true));
+ self.info.regs.cr2().write(|w| w.set_stop(true));
}
fn master_read(
+ info: &'static Info,
address: u8,
length: usize,
stop: Stop,
@@ -63,7 +64,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
// Wait for any previous address sequence to end
// automatically. This could be up to 50% of a bus
// cycle (ie. up to 0.5/freq)
- while T::regs().cr2().read().start() {
+ while info.regs.cr2().read().start() {
timeout.check()?;
}
}
@@ -78,7 +79,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
i2c::vals::Reload::COMPLETED
};
- T::regs().cr2().modify(|w| {
+ info.regs.cr2().modify(|w| {
w.set_sadd((address << 1 | 0) as u16);
w.set_add10(i2c::vals::Addmode::BIT7);
w.set_dir(i2c::vals::Dir::READ);
@@ -91,13 +92,20 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
Ok(())
}
- fn master_write(address: u8, length: usize, stop: Stop, reload: bool, timeout: Timeout) -> Result<(), Error> {
+ fn master_write(
+ info: &'static Info,
+ address: u8,
+ length: usize,
+ stop: Stop,
+ reload: bool,
+ timeout: Timeout,
+ ) -> Result<(), Error> {
assert!(length < 256);
// Wait for any previous address sequence to end
// automatically. This could be up to 50% of a bus
// cycle (ie. up to 0.5/freq)
- while T::regs().cr2().read().start() {
+ while info.regs.cr2().read().start() {
timeout.check()?;
}
@@ -110,7 +118,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
// Set START and prepare to send `bytes`. The
// START bit can be set even if the bus is BUSY or
// I2C is in slave mode.
- T::regs().cr2().modify(|w| {
+ info.regs.cr2().modify(|w| {
w.set_sadd((address << 1 | 0) as u16);
w.set_add10(i2c::vals::Addmode::BIT7);
w.set_dir(i2c::vals::Dir::WRITE);
@@ -123,10 +131,10 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
Ok(())
}
- fn master_continue(length: usize, reload: bool, timeout: Timeout) -> Result<(), Error> {
+ fn master_continue(info: &'static Info, length: usize, reload: bool, timeout: Timeout) -> Result<(), Error> {
assert!(length < 256 && length > 0);
- while !T::regs().isr().read().tcr() {
+ while !info.regs.isr().read().tcr() {
timeout.check()?;
}
@@ -136,7 +144,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
i2c::vals::Reload::COMPLETED
};
- T::regs().cr2().modify(|w| {
+ info.regs.cr2().modify(|w| {
w.set_nbytes(length as u8);
w.set_reload(reload);
});
@@ -145,27 +153,27 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
}
fn flush_txdr(&self) {
- if T::regs().isr().read().txis() {
- T::regs().txdr().write(|w| w.set_txdata(0));
+ if self.info.regs.isr().read().txis() {
+ self.info.regs.txdr().write(|w| w.set_txdata(0));
}
- if !T::regs().isr().read().txe() {
- T::regs().isr().modify(|w| w.set_txe(true))
+ if !self.info.regs.isr().read().txe() {
+ self.info.regs.isr().modify(|w| w.set_txe(true))
}
}
fn wait_txe(&self, timeout: Timeout) -> Result<(), Error> {
loop {
- let isr = T::regs().isr().read();
+ let isr = self.info.regs.isr().read();
if isr.txe() {
return Ok(());
} else if isr.berr() {
- T::regs().icr().write(|reg| reg.set_berrcf(true));
+ self.info.regs.icr().write(|reg| reg.set_berrcf(true));
return Err(Error::Bus);
} else if isr.arlo() {
- T::regs().icr().write(|reg| reg.set_arlocf(true));
+ self.info.regs.icr().write(|reg| reg.set_arlocf(true));
return Err(Error::Arbitration);
} else if isr.nackf() {
- T::regs().icr().write(|reg| reg.set_nackcf(true));
+ self.info.regs.icr().write(|reg| reg.set_nackcf(true));
self.flush_txdr();
return Err(Error::Nack);
}
@@ -176,17 +184,17 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
fn wait_rxne(&self, timeout: Timeout) -> Result<(), Error> {
loop {
- let isr = T::regs().isr().read();
+ let isr = self.info.regs.isr().read();
if isr.rxne() {
return Ok(());
} else if isr.berr() {
- T::regs().icr().write(|reg| reg.set_berrcf(true));
+ self.info.regs.icr().write(|reg| reg.set_berrcf(true));
return Err(Error::Bus);
} else if isr.arlo() {
- T::regs().icr().write(|reg| reg.set_arlocf(true));
+ self.info.regs.icr().write(|reg| reg.set_arlocf(true));
return Err(Error::Arbitration);
} else if isr.nackf() {
- T::regs().icr().write(|reg| reg.set_nackcf(true));
+ self.info.regs.icr().write(|reg| reg.set_nackcf(true));
self.flush_txdr();
return Err(Error::Nack);
}
@@ -197,17 +205,17 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
fn wait_tc(&self, timeout: Timeout) -> Result<(), Error> {
loop {
- let isr = T::regs().isr().read();
+ let isr = self.info.regs.isr().read();
if isr.tc() {
return Ok(());
} else if isr.berr() {
- T::regs().icr().write(|reg| reg.set_berrcf(true));
+ self.info.regs.icr().write(|reg| reg.set_berrcf(true));
return Err(Error::Bus);
} else if isr.arlo() {
- T::regs().icr().write(|reg| reg.set_arlocf(true));
+ self.info.regs.icr().write(|reg| reg.set_arlocf(true));
return Err(Error::Arbitration);
} else if isr.nackf() {
- T::regs().icr().write(|reg| reg.set_nackcf(true));
+ self.info.regs.icr().write(|reg| reg.set_nackcf(true));
self.flush_txdr();
return Err(Error::Nack);
}
@@ -226,6 +234,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
let last_chunk_idx = total_chunks.saturating_sub(1);
Self::master_read(
+ self.info,
address,
read.len().min(255),
Stop::Automatic,
@@ -236,14 +245,14 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
for (number, chunk) in read.chunks_mut(255).enumerate() {
if number != 0 {
- Self::master_continue(chunk.len(), number != last_chunk_idx, timeout)?;
+ Self::master_continue(self.info, chunk.len(), number != last_chunk_idx, timeout)?;
}
for byte in chunk {
// Wait until we have received something
self.wait_rxne(timeout)?;
- *byte = T::regs().rxdr().read().rxdata();
+ *byte = self.info.regs.rxdr().read().rxdata();
}
}
Ok(())
@@ -262,6 +271,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
//
// ST SAD+W
if let Err(err) = Self::master_write(
+ self.info,
address,
write.len().min(255),
Stop::Software,
@@ -276,7 +286,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
for (number, chunk) in write.chunks(255).enumerate() {
if number != 0 {
- Self::master_continue(chunk.len(), number != last_chunk_idx, timeout)?;
+ Self::master_continue(self.info, chunk.len(), number != last_chunk_idx, timeout)?;
}
for byte in chunk {
@@ -290,7 +300,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
return Err(err);
}
- T::regs().txdr().write(|w| w.set_txdata(*byte));
+ self.info.regs.txdr().write(|w| w.set_txdata(*byte));
}
}
// Wait until the write finishes
@@ -348,6 +358,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
let last_slice_index = write.len() - 1;
if let Err(err) = Self::master_write(
+ self.info,
address,
first_length.min(255),
Stop::Software,
@@ -370,6 +381,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
if idx != 0 {
if let Err(err) = Self::master_continue(
+ self.info,
slice_len.min(255),
(idx != last_slice_index) || (slice_len > 255),
timeout,
@@ -382,6 +394,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
for (number, chunk) in slice.chunks(255).enumerate() {
if number != 0 {
if let Err(err) = Self::master_continue(
+ self.info,
chunk.len(),
(number != last_chunk_idx) || (idx != last_slice_index),
timeout,
@@ -402,7 +415,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
// Put byte on the wire
//self.i2c.txdr.write(|w| w.txdata().bits(*byte));
- T::regs().txdr().write(|w| w.set_txdata(*byte));
+ self.info.regs.txdr().write(|w| w.set_txdata(*byte));
}
}
}
@@ -413,7 +426,7 @@ impl<'d, T: Instance, M: Mode> I2c<'d, T, M> {
}
}
-impl<'d, T: Instance> I2c<'d, T, Async> {
+impl<'d> I2c<'d, Async> {
async fn write_dma_internal(
&mut self,
address: u8,
@@ -425,7 +438,7 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
let total_len = write.len();
let dma_transfer = unsafe {
- let regs = T::regs();
+ let regs = self.info.regs;
regs.cr1().modify(|w| {
w.set_txdmaen(true);
if first_slice {
@@ -437,11 +450,10 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
self.tx_dma.as_mut().unwrap().write(write, dst, Default::default())
};
- let state = T::state();
let mut remaining_len = total_len;
let on_drop = OnDrop::new(|| {
- let regs = T::regs();
+ let regs = self.info.regs;
regs.cr1().modify(|w| {
if last_slice {
w.set_txdmaen(false);
@@ -451,12 +463,13 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
});
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- let isr = T::regs().isr().read();
+ let isr = self.info.regs.isr().read();
if remaining_len == total_len {
if first_slice {
Self::master_write(
+ self.info,
address,
total_len.min(255),
Stop::Software,
@@ -464,8 +477,8 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
timeout,
)?;
} else {
- Self::master_continue(total_len.min(255), (total_len > 255) || !last_slice, timeout)?;
- T::regs().cr1().modify(|w| w.set_tcie(true));
+ Self::master_continue(self.info, total_len.min(255), (total_len > 255) || !last_slice, timeout)?;
+ self.info.regs.cr1().modify(|w| w.set_tcie(true));
}
} else if !(isr.tcr() || isr.tc()) {
// poll_fn was woken without an interrupt present
@@ -475,10 +488,10 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
} else {
let last_piece = (remaining_len <= 255) && last_slice;
- if let Err(e) = Self::master_continue(remaining_len.min(255), !last_piece, timeout) {
+ if let Err(e) = Self::master_continue(self.info, remaining_len.min(255), !last_piece, timeout) {
return Poll::Ready(Err(e));
}
- T::regs().cr1().modify(|w| w.set_tcie(true));
+ self.info.regs.cr1().modify(|w| w.set_tcie(true));
}
remaining_len = remaining_len.saturating_sub(255);
@@ -509,7 +522,7 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
let total_len = buffer.len();
let dma_transfer = unsafe {
- let regs = T::regs();
+ let regs = self.info.regs;
regs.cr1().modify(|w| {
w.set_rxdmaen(true);
w.set_tcie(true);
@@ -519,11 +532,10 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
self.rx_dma.as_mut().unwrap().read(src, buffer, Default::default())
};
- let state = T::state();
let mut remaining_len = total_len;
let on_drop = OnDrop::new(|| {
- let regs = T::regs();
+ let regs = self.info.regs;
regs.cr1().modify(|w| {
w.set_rxdmaen(false);
w.set_tcie(false);
@@ -531,11 +543,12 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
});
poll_fn(|cx| {
- state.waker.register(cx.waker());
+ self.state.waker.register(cx.waker());
- let isr = T::regs().isr().read();
+ let isr = self.info.regs.isr().read();
if remaining_len == total_len {
Self::master_read(
+ self.info,
address,
total_len.min(255),
Stop::Software,
@@ -551,10 +564,10 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
} else {
let last_piece = remaining_len <= 255;
- if let Err(e) = Self::master_continue(remaining_len.min(255), !last_piece, timeout) {
+ if let Err(e) = Self::master_continue(self.info, remaining_len.min(255), !last_piece, timeout) {
return Poll::Ready(Err(e));
}
- T::regs().cr1().modify(|w| w.set_tcie(true));
+ self.info.regs.cr1().modify(|w| w.set_tcie(true));
}
remaining_len = remaining_len.saturating_sub(255);
@@ -658,9 +671,9 @@ impl<'d, T: Instance> I2c<'d, T, Async> {
}
}
-impl<'d, T: Instance, M: Mode> Drop for I2c<'d, T, M> {
+impl<'d, M: Mode> Drop for I2c<'d, M> {
fn drop(&mut self) {
- T::disable();
+ self.info.enable_bit.disable();
}
}
@@ -788,12 +801,12 @@ impl Timings {
}
}
-impl<'d, T: Instance, M: Mode> SetConfig for I2c<'d, T, M> {
+impl<'d, M: Mode> SetConfig for I2c<'d, M> {
type Config = Hertz;
type ConfigError = ();
fn set_config(&mut self, config: &Self::Config) -> Result<(), ()> {
- let timings = Timings::new(T::frequency(), *config);
- T::regs().timingr().write(|reg| {
+ let timings = Timings::new(self.kernel_clock, *config);
+ self.info.regs.timingr().write(|reg| {
reg.set_presc(timings.prescale);
reg.set_scll(timings.scll);
reg.set_sclh(timings.sclh);
diff --git a/embassy-stm32/src/i2s.rs b/embassy-stm32/src/i2s.rs
index c102c0035..c78810a38 100644
--- a/embassy-stm32/src/i2s.rs
+++ b/embassy-stm32/src/i2s.rs
@@ -208,7 +208,7 @@ impl<'d> I2S<'d> {
// rate to reach the proper audio sample frequency. The ODD bit in the SPI_I2SPR
// register also has to be defined.
- spi.regs.i2spr().modify(|w| {
+ spi.info.regs.i2spr().modify(|w| {
w.set_i2sdiv(div);
w.set_odd(match odd {
true => Odd::ODD,
@@ -235,7 +235,7 @@ impl<'d> I2S<'d> {
// 5. The I2SE bit in SPI_I2SCFGR register must be set.
- spi.regs.i2scfgr().modify(|w| {
+ spi.info.regs.i2scfgr().modify(|w| {
w.set_ckpol(config.clock_polarity.ckpol());
w.set_i2smod(true);
diff --git a/embassy-stm32/src/macros.rs b/embassy-stm32/src/macros.rs
index 9c459a932..7f8076043 100644
--- a/embassy-stm32/src/macros.rs
+++ b/embassy-stm32/src/macros.rs
@@ -1,16 +1,25 @@
#![macro_use]
macro_rules! peri_trait {
- () => {
+ (
+ $(irqs: [$($irq:ident),*],)?
+ ) => {
#[allow(private_interfaces)]
pub(crate) trait SealedInstance {
- const INFO: Info;
- const STATE: &'static State;
+ #[allow(unused)]
+ fn info() -> &'static Info;
+ #[allow(unused)]
+ fn state() -> &'static State;
}
- /// SPI instance trait.
+ /// Peripheral instance trait.
#[allow(private_bounds)]
- pub trait Instance: Peripheral<P = Self> + SealedInstance + RccPeripheral {}
+ pub trait Instance: crate::Peripheral<P = Self> + SealedInstance + crate::rcc::RccPeripheral {
+ $($(
+ /// Interrupt for this peripheral.
+ type $irq: crate::interrupt::typelevel::Interrupt;
+ )*)?
+ }
};
}
@@ -18,8 +27,14 @@ macro_rules! peri_trait_impl {
($instance:ident, $info:expr) => {
#[allow(private_interfaces)]
impl SealedInstance for crate::peripherals::$instance {
- const INFO: Info = $info;
- const STATE: &'static State = &State::new();
+ fn info() -> &'static Info {
+ static INFO: Info = $info;
+ &INFO
+ }
+ fn state() -> &'static State {
+ static STATE: State = State::new();
+ &STATE
+ }
}
impl Instance for crate::peripherals::$instance {}
};
diff --git a/embassy-stm32/src/rcc/mod.rs b/embassy-stm32/src/rcc/mod.rs
index c413b62ef..28816256c 100644
--- a/embassy-stm32/src/rcc/mod.rs
+++ b/embassy-stm32/src/rcc/mod.rs
@@ -67,10 +67,11 @@ pub(crate) unsafe fn get_freqs() -> &'static Clocks {
}
pub(crate) trait SealedRccPeripheral {
+ const ENABLE_BIT: ClockEnableBit;
+
fn frequency() -> Hertz;
fn enable_and_reset_with_cs(cs: CriticalSection);
fn disable_with_cs(cs: CriticalSection);
- fn enable_bit() -> ClockEnableBit;
fn enable_and_reset() {
critical_section::with(|cs| Self::enable_and_reset_with_cs(cs))
@@ -151,7 +152,7 @@ pub(crate) struct ClockEnableBit {
impl ClockEnableBit {
/// Safety: offset+bit must correspond to a valid xxxEN bit.
- pub(crate) unsafe fn new(offset: u8, bit: u8) -> Self {
+ pub(crate) const unsafe fn new(offset: u8, bit: u8) -> Self {
Self { offset, bit }
}
diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index 5a2ee105d..0875cfe41 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -13,7 +13,7 @@ use crate::dma::{slice_ptr_parts, word, ChannelAndRequest};
use crate::gpio::{AFType, AnyPin, Pull, SealedPin as _, Speed};
use crate::mode::{Async, Blocking, Mode as PeriMode};
use crate::pac::spi::{regs, vals, Spi as Regs};
-use crate::rcc::{ClockEnableBit, RccPeripheral};
+use crate::rcc::{ClockEnableBit, SealedRccPeripheral};
use crate::time::Hertz;
use crate::Peripheral;
@@ -93,8 +93,7 @@ impl Config {
}
/// SPI driver.
pub struct Spi<'d, M: PeriMode> {
- pub(crate) regs: Regs,
- enable_bit: ClockEnableBit,
+ pub(crate) info: &'static Info,
kernel_clock: Hertz,
sck: Option<PeripheralRef<'d, AnyPin>>,
mosi: Option<PeripheralRef<'d, AnyPin>>,
@@ -115,7 +114,7 @@ impl<'d, M: PeriMode> Spi<'d, M> {
rx_dma: Option<ChannelAndRequest<'d>>,
config: Config,
) -> Self {
- let regs = T::INFO.regs;
+ let regs = T::info().regs;
let kernel_clock = T::frequency();
let br = compute_baud_rate(kernel_clock, config.frequency);
@@ -205,8 +204,7 @@ impl<'d, M: PeriMode> Spi<'d, M> {
}
Self {
- regs,
- enable_bit: T::enable_bit(),
+ info: T::info(),
kernel_clock,
sck,
mosi,
@@ -228,7 +226,7 @@ impl<'d, M: PeriMode> Spi<'d, M> {
let br = compute_baud_rate(self.kernel_clock, config.frequency);
#[cfg(any(spi_v1, spi_f1, spi_v2))]
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_cpha(cpha);
w.set_cpol(cpol);
w.set_br(br);
@@ -237,12 +235,12 @@ impl<'d, M: PeriMode> Spi<'d, M> {
#[cfg(any(spi_v3, spi_v4, spi_v5))]
{
- self.regs.cfg2().modify(|w| {
+ self.info.regs.cfg2().modify(|w| {
w.set_cpha(cpha);
w.set_cpol(cpol);
w.set_lsbfirst(lsbfirst);
});
- self.regs.cfg1().modify(|w| {
+ self.info.regs.cfg1().modify(|w| {
w.set_mbr(br);
});
}
@@ -252,11 +250,11 @@ impl<'d, M: PeriMode> Spi<'d, M> {
/// Get current SPI configuration.
pub fn get_current_config(&self) -> Config {
#[cfg(any(spi_v1, spi_f1, spi_v2))]
- let cfg = self.regs.cr1().read();
+ let cfg = self.info.regs.cr1().read();
#[cfg(any(spi_v3, spi_v4, spi_v5))]
- let cfg = self.regs.cfg2().read();
+ let cfg = self.info.regs.cfg2().read();
#[cfg(any(spi_v3, spi_v4, spi_v5))]
- let cfg1 = self.regs.cfg1().read();
+ let cfg1 = self.info.regs.cfg1().read();
let polarity = if cfg.cpol() == vals::Cpol::IDLELOW {
Polarity::IdleLow
@@ -296,40 +294,40 @@ impl<'d, M: PeriMode> Spi<'d, M> {
#[cfg(any(spi_v1, spi_f1))]
{
- self.regs.cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_spe(false);
reg.set_dff(word_size)
});
- self.regs.cr1().modify(|reg| {
+ self.info.regs.cr1().modify(|reg| {
reg.set_spe(true);
});
}
#[cfg(spi_v2)]
{
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_spe(false);
});
- self.regs.cr2().modify(|w| {
+ self.info.regs.cr2().modify(|w| {
w.set_frxth(word_size.1);
w.set_ds(word_size.0);
});
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_spe(true);
});
}
#[cfg(any(spi_v3, spi_v4, spi_v5))]
{
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_csusp(true);
});
- while self.regs.sr().read().eot() {}
- self.regs.cr1().modify(|w| {
+ while self.info.regs.sr().read().eot() {}
+ self.info.regs.cr1().modify(|w| {
w.set_spe(false);
});
- self.regs.cfg1().modify(|w| {
+ self.info.regs.cfg1().modify(|w| {
w.set_dsize(word_size);
});
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_csusp(false);
w.set_spe(true);
});
@@ -340,22 +338,22 @@ impl<'d, M: PeriMode> Spi<'d, M> {
/// Blocking write.
pub fn blocking_write<W: Word>(&mut self, words: &[W]) -> Result<(), Error> {
- self.regs.cr1().modify(|w| w.set_spe(true));
- flush_rx_fifo(self.regs);
+ self.info.regs.cr1().modify(|w| w.set_spe(true));
+ flush_rx_fifo(self.info.regs);
self.set_word_size(W::CONFIG);
for word in words.iter() {
- let _ = transfer_word(self.regs, *word)?;
+ let _ = transfer_word(self.info.regs, *word)?;
}
Ok(())
}
/// Blocking read.
pub fn blocking_read<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
- self.regs.cr1().modify(|w| w.set_spe(true));
- flush_rx_fifo(self.regs);
+ self.info.regs.cr1().modify(|w| w.set_spe(true));
+ flush_rx_fifo(self.info.regs);
self.set_word_size(W::CONFIG);
for word in words.iter_mut() {
- *word = transfer_word(self.regs, W::default())?;
+ *word = transfer_word(self.info.regs, W::default())?;
}
Ok(())
}
@@ -364,11 +362,11 @@ impl<'d, M: PeriMode> Spi<'d, M> {
///
/// This writes the contents of `data` on MOSI, and puts the received data on MISO in `data`, at the same time.
pub fn blocking_transfer_in_place<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
- self.regs.cr1().modify(|w| w.set_spe(true));
- flush_rx_fifo(self.regs);
+ self.info.regs.cr1().modify(|w| w.set_spe(true));
+ flush_rx_fifo(self.info.regs);
self.set_word_size(W::CONFIG);
for word in words.iter_mut() {
- *word = transfer_word(self.regs, *word)?;
+ *word = transfer_word(self.info.regs, *word)?;
}
Ok(())
}
@@ -380,13 +378,13 @@ impl<'d, M: PeriMode> Spi<'d, M> {
/// The transfer runs for `max(read.len(), write.len())` bytes. If `read` is shorter extra bytes are ignored.
/// If `write` is shorter it is padded with zero bytes.
pub fn blocking_transfer<W: Word>(&mut self, read: &mut [W], write: &[W]) -> Result<(), Error> {
- self.regs.cr1().modify(|w| w.set_spe(true));
- flush_rx_fifo(self.regs);
+ self.info.regs.cr1().modify(|w| w.set_spe(true));
+ flush_rx_fifo(self.info.regs);
self.set_word_size(W::CONFIG);
let len = read.len().max(write.len());
for i in 0..len {
let wb = write.get(i).copied().unwrap_or_default();
- let rb = transfer_word(self.regs, wb)?;
+ let rb = transfer_word(self.info.regs, wb)?;
if let Some(r) = read.get_mut(i) {
*r = rb;
}
@@ -588,25 +586,25 @@ impl<'d> Spi<'d, Async> {
}
self.set_word_size(W::CONFIG);
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_spe(false);
});
- let tx_dst = self.regs.tx_ptr();
+ let tx_dst = self.info.regs.tx_ptr();
let tx_f = unsafe { self.tx_dma.as_mut().unwrap().write(data, tx_dst, Default::default()) };
- set_txdmaen(self.regs, true);
- self.regs.cr1().modify(|w| {
+ set_txdmaen(self.info.regs, true);
+ self.info.regs.cr1().modify(|w| {
w.set_spe(true);
});
#[cfg(any(spi_v3, spi_v4, spi_v5))]
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_cstart(true);
});
tx_f.await;
- finish_dma(self.regs);
+ finish_dma(self.info.regs);
Ok(())
}
@@ -618,22 +616,22 @@ impl<'d> Spi<'d, Async> {
}
self.set_word_size(W::CONFIG);
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_spe(false);
});
// SPIv3 clears rxfifo on SPE=0
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
- flush_rx_fifo(self.regs);
+ flush_rx_fifo(self.info.regs);
- set_rxdmaen(self.regs, true);
+ set_rxdmaen(self.info.regs, true);
let clock_byte_count = data.len();
- let rx_src = self.regs.rx_ptr();
+ let rx_src = self.info.regs.rx_ptr();
let rx_f = unsafe { self.rx_dma.as_mut().unwrap().read(rx_src, data, Default::default()) };
- let tx_dst = self.regs.tx_ptr();
+ let tx_dst = self.info.regs.tx_ptr();
let clock_byte = 0x00u8;
let tx_f = unsafe {
self.tx_dma
@@ -642,18 +640,18 @@ impl<'d> Spi<'d, Async> {
.write_repeated(&clock_byte, clock_byte_count, tx_dst, Default::default())
};
- set_txdmaen(self.regs, true);
- self.regs.cr1().modify(|w| {
+ set_txdmaen(self.info.regs, true);
+ self.info.regs.cr1().modify(|w| {
w.set_spe(true);
});
#[cfg(any(spi_v3, spi_v4, spi_v5))]
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_cstart(true);
});
join(tx_f, rx_f).await;
- finish_dma(self.regs);
+ finish_dma(self.info.regs);
Ok(())
}
@@ -667,20 +665,20 @@ impl<'d> Spi<'d, Async> {
}
self.set_word_size(W::CONFIG);
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_spe(false);
});
// SPIv3 clears rxfifo on SPE=0
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
- flush_rx_fifo(self.regs);
+ flush_rx_fifo(self.info.regs);
- set_rxdmaen(self.regs, true);
+ set_rxdmaen(self.info.regs, true);
- let rx_src = self.regs.rx_ptr();
+ let rx_src = self.info.regs.rx_ptr();
let rx_f = unsafe { self.rx_dma.as_mut().unwrap().read_raw(rx_src, read, Default::default()) };
- let tx_dst = self.regs.tx_ptr();
+ let tx_dst = self.info.regs.tx_ptr();
let tx_f = unsafe {
self.tx_dma
.as_mut()
@@ -688,18 +686,18 @@ impl<'d> Spi<'d, Async> {
.write_raw(write, tx_dst, Default::default())
};
- set_txdmaen(self.regs, true);
- self.regs.cr1().modify(|w| {
+ set_txdmaen(self.info.regs, true);
+ self.info.regs.cr1().modify(|w| {
w.set_spe(true);
});
#[cfg(any(spi_v3, spi_v4, spi_v5))]
- self.regs.cr1().modify(|w| {
+ self.info.regs.cr1().modify(|w| {
w.set_cstart(true);
});
join(tx_f, rx_f).await;
- finish_dma(self.regs);
+ finish_dma(self.info.regs);
Ok(())
}
@@ -728,7 +726,7 @@ impl<'d, M: PeriMode> Drop for Spi<'d, M> {
self.mosi.as_ref().map(|x| x.set_as_disconnected());
self.miso.as_ref().map(|x| x.set_as_disconnected());
- self.enable_bit.disable();
+ self.info.enable_bit.disable();
}
}
@@ -1106,8 +1104,9 @@ mod word_impl {
impl_word!(u32, 32 - 1);
}
-struct Info {
- regs: Regs,
+pub(crate) struct Info {
+ pub(crate) regs: Regs,
+ pub(crate) enable_bit: ClockEnableBit,
}
struct State {}
@@ -1134,6 +1133,7 @@ foreach_peripheral!(
(spi, $inst:ident) => {
peri_trait_impl!($inst, Info {
regs: crate::pac::$inst,
+ enable_bit: crate::peripherals::$inst::ENABLE_BIT,
});
};
);
diff --git a/examples/stm32h7/src/bin/i2c_shared.rs b/examples/stm32h7/src/bin/i2c_shared.rs
index 79d213ae4..6f4815582 100644
--- a/examples/stm32h7/src/bin/i2c_shared.rs
+++ b/examples/stm32h7/src/bin/i2c_shared.rs
@@ -6,11 +6,10 @@ use core::cell::RefCell;
use defmt::*;
use embassy_embedded_hal::shared_bus::blocking::i2c::I2cDevice;
use embassy_executor::Spawner;
-use embassy_stm32::bind_interrupts;
use embassy_stm32::i2c::{self, I2c};
use embassy_stm32::mode::Async;
-use embassy_stm32::peripherals::{self, I2C1};
use embassy_stm32::time::Hertz;
+use embassy_stm32::{bind_interrupts, peripherals};
use embassy_sync::blocking_mutex::NoopMutex;
use embassy_time::{Duration, Timer};
use static_cell::StaticCell;
@@ -24,7 +23,7 @@ const SHTC3_WAKEUP: [u8; 2] = [0x35, 0x17];
const SHTC3_MEASURE_RH_FIRST: [u8; 2] = [0x5c, 0x24];
const SHTC3_SLEEP: [u8; 2] = [0xb0, 0x98];
-static I2C_BUS: StaticCell<NoopMutex<RefCell<I2c<'static, I2C1, Async>>>> = StaticCell::new();
+static I2C_BUS: StaticCell<NoopMutex<RefCell<I2c<'static, Async>>>> = StaticCell::new();
bind_interrupts!(struct Irqs {
I2C1_EV => i2c::EventInterruptHandler<peripherals::I2C1>;
diff --git a/examples/stm32l4/src/bin/spe_adin1110_http_server.rs b/examples/stm32l4/src/bin/spe_adin1110_http_server.rs
index 985ac8171..33149144c 100644
--- a/examples/stm32l4/src/bin/spe_adin1110_http_server.rs
+++ b/examples/stm32l4/src/bin/spe_adin1110_http_server.rs
@@ -60,7 +60,7 @@ pub type SpeSpiCs = ExclusiveDevice<SpeSpi, Output<'static>, Delay>;
pub type SpeInt = exti::ExtiInput<'static>;
pub type SpeRst = Output<'static>;
pub type Adin1110T = ADIN1110<SpeSpiCs>;
-pub type TempSensI2c = I2c<'static, peripherals::I2C3, Async>;
+pub type TempSensI2c = I2c<'static, Async>;
static TEMP: AtomicI32 = AtomicI32::new(0);