Merge pull request #1836 from jessebraham/feature/release

Release embassy-time v0.1.3

ci.sh

@@ -19,6 +19,19 @@ cargo batch  \
     --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,log \
     --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,defmt \
     --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv6m-none-eabi --features nightly,defmt \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv6m-none-eabi --features nightly,defmt,arch-cortex-m,executor-thread,executor-interrupt,integrated-timers \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,integrated-timers \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,executor-thread \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,executor-thread,integrated-timers \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,executor-interrupt \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,executor-interrupt,integrated-timers \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,executor-thread,executor-interrupt \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target thumbv7em-none-eabi --features nightly,arch-cortex-m,executor-thread,executor-interrupt,integrated-timers \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target riscv32imac-unknown-none-elf --features nightly,arch-riscv32 \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target riscv32imac-unknown-none-elf --features nightly,arch-riscv32,integrated-timers \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target riscv32imac-unknown-none-elf --features nightly,arch-riscv32,executor-thread \
+    --- build --release --manifest-path embassy-executor/Cargo.toml --target riscv32imac-unknown-none-elf --features nightly,arch-riscv32,executor-thread,integrated-timers \
     --- build --release --manifest-path embassy-sync/Cargo.toml --target thumbv6m-none-eabi --features nightly,defmt \
     --- build --release --manifest-path embassy-time/Cargo.toml --target thumbv6m-none-eabi --features nightly,defmt,defmt-timestamp-uptime,tick-hz-32_768,generic-queue-8 \
     --- build --release --manifest-path embassy-net/Cargo.toml --target thumbv7em-none-eabi --features defmt,tcp,udp,dns,proto-ipv4,medium-ethernet \

cyw43/Cargo.toml

@@ -11,7 +11,7 @@ log = ["dep:log"]
 firmware-logs = []
 
 [dependencies]
-embassy-time = { version = "0.1.2", path = "../embassy-time"}
+embassy-time = { version = "0.1.3", path = "../embassy-time"}
 embassy-sync = { version = "0.2.0", path = "../embassy-sync"}
 embassy-futures = { version = "0.1.0", path = "../embassy-futures"}
 embassy-net-driver-channel = { version = "0.1.0", path = "../embassy-net-driver-channel"}

embassy-embedded-hal/Cargo.toml

@@ -21,7 +21,7 @@ default = ["time"]
 [dependencies]
 embassy-futures = { version = "0.1.0", path = "../embassy-futures", optional = true }
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
-embassy-time = { version = "0.1.2", path = "../embassy-time", optional = true }
+embassy-time = { version = "0.1.3", path = "../embassy-time", optional = true }
 embedded-hal-02 = { package = "embedded-hal", version = "0.2.6", features = [
     "unproven",
 ] }

embassy-executor/Cargo.toml

@@ -59,7 +59,7 @@ rtos-trace = { version = "0.1.2", optional = true }
 
 futures-util = { version = "0.3.17", default-features = false }
 embassy-macros = { version = "0.2.1", path = "../embassy-macros" }
-embassy-time = { version = "0.1.2", path = "../embassy-time", optional = true}
+embassy-time = { version = "0.1.3", path = "../embassy-time", optional = true}
 atomic-polyfill = "1.0.1"
 critical-section = "1.1"
 static_cell = "1.1"

embassy-executor/src/arch/cortex_m.rs

@@ -1,5 +1,3 @@
-const THREAD_PENDER: usize = usize::MAX;
-
 #[export_name = "__pender"]
 #[cfg(any(feature = "executor-thread", feature = "executor-interrupt"))]
 fn __pender(context: *mut ()) {
@@ -48,13 +46,14 @@ fn __pender(context: *mut ()) {
 pub use thread::*;
 #[cfg(feature = "executor-thread")]
 mod thread {
+    pub(super) const THREAD_PENDER: usize = usize::MAX;
+
     use core::arch::asm;
     use core::marker::PhantomData;
 
     #[cfg(feature = "nightly")]
     pub use embassy_macros::main_cortex_m as main;
 
-    use crate::arch::THREAD_PENDER;
     use crate::{raw, Spawner};
 
     /// Thread mode executor, using WFE/SEV.

embassy-lora/Cargo.toml

@@ -20,7 +20,7 @@ defmt = ["dep:defmt", "lorawan-device/defmt"]
 defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 
-embassy-time = { version = "0.1.2", path = "../embassy-time", optional = true }
+embassy-time = { version = "0.1.3", path = "../embassy-time", optional = true }
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
 embassy-stm32 = { version = "0.1.0", path = "../embassy-stm32", default-features = false, optional = true }
 embedded-hal-async = { version = "=1.0.0-rc.1" }

embassy-net-enc28j60/Cargo.toml

@@ -11,7 +11,7 @@ edition = "2021"
 embedded-hal = { version = "1.0.0-rc.1" }
 embedded-hal-async = { version = "=1.0.0-rc.1" }
 embassy-net-driver = { version = "0.1.0", path = "../embassy-net-driver" }
-embassy-time = { version = "0.1.2", path = "../embassy-time" }
+embassy-time = { version = "0.1.3", path = "../embassy-time" }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 
 defmt = { version = "0.3", optional = true }

embassy-net-esp-hosted/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 
-embassy-time = { version = "0.1.2", path = "../embassy-time" }
+embassy-time = { version = "0.1.3", path = "../embassy-time" }
 embassy-sync = { version = "0.2.0", path = "../embassy-sync"}
 embassy-futures = { version = "0.1.0", path = "../embassy-futures"}
 embassy-net-driver-channel = { version = "0.1.0", path = "../embassy-net-driver-channel"}

embassy-net-wiznet/Cargo.toml

@@ -11,7 +11,7 @@ edition = "2021"
 embedded-hal = { version = "1.0.0-rc.1" }
 embedded-hal-async = { version = "=1.0.0-rc.1" }
 embassy-net-driver-channel = { version = "0.1.0", path = "../embassy-net-driver-channel" }
-embassy-time = { version = "0.1.2", path = "../embassy-time" }
+embassy-time = { version = "0.1.3", path = "../embassy-time" }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 defmt = { version = "0.3", optional = true }
 

embassy-net/Cargo.toml

@@ -51,7 +51,7 @@ smoltcp = { version = "0.10.0", default-features = false, features = [
 ] }
 
 embassy-net-driver = { version = "0.1.0", path = "../embassy-net-driver" }
-embassy-time = { version = "0.1.2", path = "../embassy-time" }
+embassy-time = { version = "0.1.3", path = "../embassy-time" }
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
 embedded-io-async = { version = "0.5.0", optional = true }
 

embassy-nrf/Cargo.toml

@@ -91,7 +91,7 @@ _dppi = []
 _gpio-p1 = []
 
 [dependencies]
-embassy-time = { version = "0.1.2", path = "../embassy-time", optional = true }
+embassy-time = { version = "0.1.3", path = "../embassy-time", optional = true }
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
 embassy-hal-internal = {version = "0.1.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-3"] }
 embassy-embedded-hal = {version = "0.1.0", path = "../embassy-embedded-hal" }

embassy-rp/Cargo.toml

@@ -60,7 +60,7 @@ unstable-traits = ["embedded-hal-1", "embedded-hal-nb"]
 
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
-embassy-time = { version = "0.1.2", path = "../embassy-time", features = [ "tick-hz-1_000_000" ] }
+embassy-time = { version = "0.1.3", path = "../embassy-time", features = [ "tick-hz-1_000_000" ] }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-hal-internal = {version = "0.1.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-2"] }
 embassy-embedded-hal = {version = "0.1.0", path = "../embassy-embedded-hal" }

embassy-stm32-wpan/Cargo.toml

@@ -13,7 +13,7 @@ features = ["stm32wb55rg"]
 [dependencies]
 embassy-stm32 = { version = "0.1.0", path = "../embassy-stm32" }
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
-embassy-time = { version = "0.1.2", path = "../embassy-time", optional = true }
+embassy-time = { version = "0.1.3", path = "../embassy-time", optional = true }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-hal-internal = { version = "0.1.0", path = "../embassy-hal-internal" }
 embassy-embedded-hal = { version = "0.1.0", path = "../embassy-embedded-hal" }

embassy-stm32/Cargo.toml

@@ -32,7 +32,7 @@ flavors = [
 
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../embassy-sync" }
-embassy-time = { version = "0.1.2", path = "../embassy-time", optional = true }
+embassy-time = { version = "0.1.3", path = "../embassy-time", optional = true }
 embassy-futures = { version = "0.1.0", path = "../embassy-futures" }
 embassy-hal-internal = {version = "0.1.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-4"] }
 embassy-embedded-hal = {version = "0.1.0", path = "../embassy-embedded-hal" }
@@ -58,7 +58,7 @@ sdio-host = "0.5.0"
 embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
 critical-section = "1.1"
 atomic-polyfill = "1.0.1"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-2b87e34c661e19ff6dc603fabfe7fe99ab7261f7" }
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-9a61a1f090462df8bd1751f89951f04934fdceb3" }
 vcell = "0.1.3"
 bxcan = "0.7.0"
 nb = "1.0.0"
@@ -77,7 +77,7 @@ critical-section = { version = "1.1", features = ["std"] }
 [build-dependencies]
 proc-macro2 = "1.0.36"
 quote = "1.0.15"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-2b87e34c661e19ff6dc603fabfe7fe99ab7261f7", default-features = false, features = ["metadata"]}
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-9a61a1f090462df8bd1751f89951f04934fdceb3", default-features = false, features = ["metadata"]}
 
 [features]
 default = ["rt"]

embassy-stm32/src/lib.rs

@@ -197,6 +197,11 @@ pub fn init(config: Config) -> Peripherals {
         // must be after rcc init
         #[cfg(feature = "_time-driver")]
         time_driver::init();
+
+        #[cfg(feature = "low-power")]
+        while !crate::rcc::low_power_ready() {
+            crate::rcc::clock_refcount_sub();
+        }
     }
 
     p

embassy-stm32/src/low_power.rs

@@ -3,46 +3,52 @@ use core::marker::PhantomData;
 
 use cortex_m::peripheral::SCB;
 use embassy_executor::*;
-use embassy_time::Duration;
 
 use crate::interrupt;
 use crate::interrupt::typelevel::Interrupt;
 use crate::pac::EXTI;
 use crate::rcc::low_power_ready;
+use crate::time_driver::{get_driver, RtcDriver};
 
 const THREAD_PENDER: usize = usize::MAX;
-const THRESHOLD: Duration = Duration::from_millis(500);
 
-use crate::rtc::{Rtc, RtcInstant};
+use crate::rtc::Rtc;
 
-static mut RTC: Option<&'static Rtc> = None;
+static mut EXECUTOR: Option<Executor> = None;
 
 foreach_interrupt! {
     (RTC, rtc, $block:ident, WKUP, $irq:ident) => {
         #[interrupt]
         unsafe fn $irq() {
-            Executor::on_wakeup_irq();
+            unsafe { EXECUTOR.as_mut().unwrap() }.on_wakeup_irq();
         }
     };
 }
 
+// pub fn timer_driver_pause_time() {
+//     pause_time();
+// }
+
 pub fn stop_with_rtc(rtc: &'static Rtc) {
-    crate::interrupt::typelevel::RTC_WKUP::unpend();
+    unsafe { EXECUTOR.as_mut().unwrap() }.stop_with_rtc(rtc)
-    unsafe { crate::interrupt::typelevel::RTC_WKUP::enable() };
-
-    EXTI.rtsr(0).modify(|w| w.set_line(22, true));
-    EXTI.imr(0).modify(|w| w.set_line(22, true));
-
-    unsafe { RTC = Some(rtc) };
 }
 
-pub fn start_wakeup_alarm(requested_duration: embassy_time::Duration) -> RtcInstant {
+// pub fn start_wakeup_alarm(requested_duration: embassy_time::Duration) {
-    unsafe { RTC }.unwrap().start_wakeup_alarm(requested_duration)
+//     let rtc_instant = unsafe { EXECUTOR.as_mut().unwrap() }
-}
+//         .rtc
-
+//         .unwrap()
-pub fn stop_wakeup_alarm() -> RtcInstant {
+//         .start_wakeup_alarm(requested_duration);
-    unsafe { RTC }.unwrap().stop_wakeup_alarm()
+//
-}
+//     unsafe { EXECUTOR.as_mut().unwrap() }.last_stop = Some(rtc_instant);
+// }
+//
+// pub fn set_sleepdeep() {
+//     unsafe { EXECUTOR.as_mut().unwrap() }.scb.set_sleepdeep();
+// }
+//
+// pub fn stop_wakeup_alarm() -> RtcInstant {
+//     unsafe { EXECUTOR.as_mut().unwrap() }.rtc.unwrap().stop_wakeup_alarm()
+// }
 
 /// Thread mode executor, using WFE/SEV.
 ///
@@ -57,54 +63,62 @@ pub fn stop_wakeup_alarm() -> RtcInstant {
 pub struct Executor {
     inner: raw::Executor,
     not_send: PhantomData<*mut ()>,
+    scb: SCB,
+    time_driver: &'static RtcDriver,
 }
 
 impl Executor {
     /// Create a new Executor.
-    pub fn new() -> Self {
+    pub fn take() -> &'static mut Self {
-        Self {
+        unsafe {
-            inner: raw::Executor::new(THREAD_PENDER as *mut ()),
+            assert!(EXECUTOR.is_none());
-            not_send: PhantomData,
+
+            EXECUTOR = Some(Self {
+                inner: raw::Executor::new(THREAD_PENDER as *mut ()),
+                not_send: PhantomData,
+                scb: cortex_m::Peripherals::steal().SCB,
+                time_driver: get_driver(),
+            });
+
+            EXECUTOR.as_mut().unwrap()
         }
     }
 
-    unsafe fn on_wakeup_irq() {
+    unsafe fn on_wakeup_irq(&mut self) {
-        info!("on wakeup irq");
+        trace!("low power: on wakeup irq");
 
-        cortex_m::asm::bkpt();
+        self.time_driver.resume_time();
+        trace!("low power: resume time");
     }
 
-    fn time_until_next_alarm(&self) -> Duration {
+    pub(self) fn stop_with_rtc(&mut self, rtc: &'static Rtc) {
-        Duration::from_secs(3)
+        trace!("low power: stop with rtc configured");
+
+        self.time_driver.set_rtc(rtc);
+
+        crate::interrupt::typelevel::RTC_WKUP::unpend();
+        unsafe { crate::interrupt::typelevel::RTC_WKUP::enable() };
+
+        EXTI.rtsr(0).modify(|w| w.set_line(22, true));
+        EXTI.imr(0).modify(|w| w.set_line(22, true));
     }
 
-    fn get_scb() -> SCB {
+    fn configure_pwr(&mut self) {
-        unsafe { cortex_m::Peripherals::steal() }.SCB
+        trace!("low power: configure_pwr");
-    }
-
-    fn configure_pwr(&self) {
-        trace!("configure_pwr");
 
+        self.scb.clear_sleepdeep();
         if !low_power_ready() {
+            trace!("low power: configure_pwr: low power not ready");
             return;
         }
 
-        let time_until_next_alarm = self.time_until_next_alarm();
+        if self.time_driver.pause_time().is_err() {
-        if time_until_next_alarm < THRESHOLD {
+            trace!("low power: configure_pwr: time driver failed to pause");
             return;
         }
 
-        trace!("low power stop required");
+        trace!("low power: enter stop...");
-
+        self.scb.set_sleepdeep();
-        critical_section::with(|_| {
-            trace!("executor: set wakeup alarm...");
-
-            start_wakeup_alarm(time_until_next_alarm);
-
-            trace!("low power wait for rtc ready...");
-
-            Self::get_scb().set_sleepdeep();
-        });
     }
 
     /// Run the executor.
@@ -126,11 +140,11 @@ impl Executor {
     ///
     /// This function never returns.
     pub fn run(&'static mut self, init: impl FnOnce(Spawner)) -> ! {
-        init(self.inner.spawner());
+        init(unsafe { EXECUTOR.as_mut().unwrap() }.inner.spawner());
 
         loop {
             unsafe {
-                self.inner.poll();
+                EXECUTOR.as_mut().unwrap().inner.poll();
                 self.configure_pwr();
                 asm!("wfe");
             };

embassy-stm32/src/rcc/bd.rs

@@ -0,0 +1,151 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(u8)]
+#[allow(dead_code)]
+pub enum RtcClockSource {
+    /// 00: No clock
+    NoClock = 0b00,
+    /// 01: LSE oscillator clock used as RTC clock
+    LSE = 0b01,
+    /// 10: LSI oscillator clock used as RTC clock
+    LSI = 0b10,
+    /// 11: HSE oscillator clock divided by 32 used as RTC clock
+    HSE = 0b11,
+}
+
+#[cfg(not(any(rtc_v2l0, rtc_v2l1, stm32c0)))]
+#[allow(dead_code)]
+type Bdcr = crate::pac::rcc::regs::Bdcr;
+
+#[cfg(any(rtc_v2l0, rtc_v2l1))]
+#[allow(dead_code)]
+type Bdcr = crate::pac::rcc::regs::Csr;
+
+#[allow(dead_code)]
+pub struct BackupDomain {}
+
+impl BackupDomain {
+    #[cfg(any(
+        rtc_v2f0, rtc_v2f2, rtc_v2f3, rtc_v2f4, rtc_v2f7, rtc_v2h7, rtc_v2l0, rtc_v2l1, rtc_v2l4, rtc_v2wb, rtc_v3,
+        rtc_v3u5
+    ))]
+    #[allow(dead_code, unused_variables)]
+    fn modify<R>(f: impl FnOnce(&mut Bdcr) -> R) -> R {
+        #[cfg(any(rtc_v2f2, rtc_v2f3, rtc_v2l1))]
+        let cr = crate::pac::PWR.cr();
+        #[cfg(any(rtc_v2f4, rtc_v2f7, rtc_v2h7, rtc_v2l4, rtc_v2wb, rtc_v3, rtc_v3u5))]
+        let cr = crate::pac::PWR.cr1();
+
+        // TODO: Missing from PAC for l0 and f0?
+        #[cfg(not(any(rtc_v2f0, rtc_v2l0, rtc_v3u5)))]
+        {
+            cr.modify(|w| w.set_dbp(true));
+            while !cr.read().dbp() {}
+        }
+
+        #[cfg(any(rtc_v2l0, rtc_v2l1))]
+        let cr = crate::pac::RCC.csr();
+
+        #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
+        let cr = crate::pac::RCC.bdcr();
+
+        cr.modify(|w| f(w))
+    }
+
+    #[cfg(any(
+        rtc_v2f0, rtc_v2f2, rtc_v2f3, rtc_v2f4, rtc_v2f7, rtc_v2h7, rtc_v2l0, rtc_v2l1, rtc_v2l4, rtc_v2wb, rtc_v3,
+        rtc_v3u5
+    ))]
+    #[allow(dead_code)]
+    fn read() -> Bdcr {
+        #[cfg(any(rtc_v2l0, rtc_v2l1))]
+        let r = crate::pac::RCC.csr().read();
+
+        #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
+        let r = crate::pac::RCC.bdcr().read();
+
+        r
+    }
+
+    #[cfg(any(
+        rtc_v2f0, rtc_v2f2, rtc_v2f3, rtc_v2f4, rtc_v2f7, rtc_v2h7, rtc_v2l0, rtc_v2l1, rtc_v2l4, rtc_v2wb, rtc_v3,
+        rtc_v3u5
+    ))]
+    #[allow(dead_code, unused_variables)]
+    pub fn set_rtc_clock_source(clock_source: RtcClockSource) {
+        let clock_source = clock_source as u8;
+        #[cfg(any(
+            all(not(any(rtc_v3, rtc_v3u5)), not(rtc_v2wb)),
+            all(any(rtc_v3, rtc_v3u5), not(any(rcc_wl5, rcc_wle)))
+        ))]
+        let clock_source = crate::pac::rcc::vals::Rtcsel::from_bits(clock_source);
+
+        #[cfg(not(rtc_v2wb))]
+        Self::modify(|w| {
+            // Select RTC source
+            w.set_rtcsel(clock_source);
+        });
+    }
+
+    #[cfg(any(
+        rtc_v2f0, rtc_v2f2, rtc_v2f3, rtc_v2f4, rtc_v2f7, rtc_v2h7, rtc_v2l0, rtc_v2l1, rtc_v2l4, rtc_v2wb
+    ))]
+    #[allow(dead_code)]
+    pub fn enable_rtc() {
+        let reg = Self::read();
+
+        #[cfg(any(rtc_v2h7, rtc_v2l4, rtc_v2wb))]
+        assert!(!reg.lsecsson(), "RTC is not compatible with LSE CSS, yet.");
+
+        if !reg.rtcen() {
+            #[cfg(not(any(rtc_v2l0, rtc_v2l1, rtc_v2f2)))]
+            Self::modify(|w| w.set_bdrst(true));
+
+            Self::modify(|w| {
+                // Reset
+                #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
+                w.set_bdrst(false);
+
+                w.set_rtcen(true);
+                w.set_rtcsel(reg.rtcsel());
+
+                // Restore bcdr
+                #[cfg(any(rtc_v2l4, rtc_v2wb))]
+                w.set_lscosel(reg.lscosel());
+                #[cfg(any(rtc_v2l4, rtc_v2wb))]
+                w.set_lscoen(reg.lscoen());
+
+                w.set_lseon(reg.lseon());
+
+                #[cfg(any(rtc_v2f0, rtc_v2f7, rtc_v2h7, rtc_v2l4, rtc_v2wb))]
+                w.set_lsedrv(reg.lsedrv());
+                w.set_lsebyp(reg.lsebyp());
+            });
+        }
+    }
+
+    #[cfg(any(rtc_v3, rtc_v3u5))]
+    #[allow(dead_code)]
+    pub fn enable_rtc() {
+        let reg = Self::read();
+        assert!(!reg.lsecsson(), "RTC is not compatible with LSE CSS, yet.");
+
+        if !reg.rtcen() {
+            Self::modify(|w| w.set_bdrst(true));
+
+            Self::modify(|w| {
+                w.set_bdrst(false);
+
+                w.set_rtcen(true);
+                w.set_rtcsel(reg.rtcsel());
+
+                // Restore bcdr
+                w.set_lscosel(reg.lscosel());
+                w.set_lscoen(reg.lscoen());
+
+                w.set_lseon(reg.lseon());
+                w.set_lsedrv(reg.lsedrv());
+                w.set_lsebyp(reg.lsebyp());
+            });
+        }
+    }
+}

embassy-stm32/src/rcc/c0.rs

@@ -1,4 +1,4 @@
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::flash::vals::Latency;
 use crate::pac::rcc::vals::{Hsidiv, Ppre, Sw};
 use crate::pac::{FLASH, RCC};

embassy-stm32/src/rcc/f2.rs

@@ -1,7 +1,7 @@
 use core::convert::TryFrom;
 use core::ops::{Div, Mul};
 
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::flash::vals::Latency;
 use crate::pac::rcc::vals::{Pllp, Pllsrc, Sw};
 use crate::pac::{FLASH, RCC};
@@ -201,7 +201,7 @@ pub struct PLLClocks {
     pub pll48_freq: Hertz,
 }
 
-pub use super::common::VoltageScale;
+pub use super::bus::VoltageScale;
 
 impl VoltageScale {
     const fn wait_states(&self, ahb_freq: Hertz) -> Option<Latency> {

embassy-stm32/src/rcc/f3.rs

@@ -201,9 +201,9 @@ fn calc_pll(config: &Config, Hertz(sysclk): Hertz) -> (Hertz, PllConfig) {
     // Calculates the Multiplier and the Divisor to arrive at
     // the required System clock from PLL source frequency
     let get_mul_div = |sysclk, pllsrcclk| {
-        let common_div = gcd(sysclk, pllsrcclk);
+        let bus_div = gcd(sysclk, pllsrcclk);
-        let mut multiplier = sysclk / common_div;
+        let mut multiplier = sysclk / bus_div;
-        let mut divisor = pllsrcclk / common_div;
+        let mut divisor = pllsrcclk / bus_div;
         // Minimum PLL multiplier is two
         if multiplier == 1 {
             multiplier *= 2;

embassy-stm32/src/rcc/f4.rs

@@ -8,8 +8,8 @@ use crate::gpio::sealed::AFType;
 use crate::gpio::Speed;
 use crate::pac::rcc::vals::{Hpre, Ppre, Sw};
 use crate::pac::{FLASH, PWR, RCC};
+use crate::rcc::bd::{BackupDomain, RtcClockSource};
 use crate::rcc::{set_freqs, Clocks};
-use crate::rtc::{Rtc, RtcClockSource};
 use crate::time::Hertz;
 use crate::{peripherals, Peripheral};
 
@@ -470,7 +470,7 @@ pub(crate) unsafe fn init(config: Config) {
     }
 
     config.rtc.map(|clock_source| {
-        Rtc::set_clock_source(clock_source);
+        BackupDomain::set_rtc_clock_source(clock_source);
     });
 
     let rtc = match config.rtc {

embassy-stm32/src/rcc/g0.rs

@@ -1,4 +1,4 @@
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::flash::vals::Latency;
 use crate::pac::rcc::vals::{self, Hsidiv, Ppre, Sw};
 use crate::pac::{FLASH, PWR, RCC};

embassy-stm32/src/rcc/g4.rs

@@ -2,7 +2,7 @@ use stm32_metapac::flash::vals::Latency;
 use stm32_metapac::rcc::vals::{Hpre, Pllsrc, Ppre, Sw};
 use stm32_metapac::FLASH;
 
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::{PWR, RCC};
 use crate::rcc::sealed::RccPeripheral;
 use crate::rcc::{set_freqs, Clocks};

embassy-stm32/src/rcc/h5.rs

@@ -26,7 +26,7 @@ const VCO_MAX: u32 = 420_000_000;
 const VCO_WIDE_MIN: u32 = 128_000_000;
 const VCO_WIDE_MAX: u32 = 560_000_000;
 
-pub use super::common::{AHBPrescaler, APBPrescaler, VoltageScale};
+pub use super::bus::{AHBPrescaler, APBPrescaler, VoltageScale};
 
 pub enum HseMode {
     /// crystal/ceramic oscillator (HSEBYP=0)

embassy-stm32/src/rcc/h7.rs

@@ -24,7 +24,7 @@ pub const HSI48_FREQ: Hertz = Hertz(48_000_000);
 /// LSI speed
 pub const LSI_FREQ: Hertz = Hertz(32_000);
 
-pub use super::common::VoltageScale;
+pub use super::bus::VoltageScale;
 
 #[derive(Clone, Copy)]
 pub enum AdcClockSource {

embassy-stm32/src/rcc/l0.rs

@@ -1,4 +1,4 @@
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::rcc::vals::{Hpre, Msirange, Plldiv, Pllmul, Pllsrc, Ppre, Sw};
 use crate::pac::RCC;
 #[cfg(crs)]

embassy-stm32/src/rcc/l1.rs

@@ -1,4 +1,4 @@
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::rcc::vals::{Hpre, Msirange, Plldiv, Pllmul, Pllsrc, Ppre, Sw};
 use crate::pac::{FLASH, RCC};
 use crate::rcc::{set_freqs, Clocks};

embassy-stm32/src/rcc/l4.rs

@@ -4,13 +4,13 @@ use embassy_hal_internal::into_ref;
 use stm32_metapac::rcc::regs::Cfgr;
 use stm32_metapac::rcc::vals::{Lsedrv, Mcopre, Mcosel};
 
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::gpio::sealed::AFType;
 use crate::gpio::Speed;
 use crate::pac::rcc::vals::{Hpre, Msirange, Pllsrc, Ppre, Sw};
 use crate::pac::{FLASH, PWR, RCC};
+use crate::rcc::bd::{BackupDomain, RtcClockSource};
 use crate::rcc::{set_freqs, Clocks};
-use crate::rtc::{Rtc, RtcClockSource as RCS};
 use crate::time::Hertz;
 use crate::{peripherals, Peripheral};
 
@@ -254,16 +254,11 @@ impl Default for Config {
             pllsai1: None,
             #[cfg(not(any(stm32l471, stm32l475, stm32l476, stm32l486)))]
             hsi48: false,
-            rtc_mux: RtcClockSource::LSI32,
+            rtc_mux: RtcClockSource::LSI,
         }
     }
 }
 
-pub enum RtcClockSource {
-    LSE32,
-    LSI32,
-}
-
 pub enum McoClock {
     DIV1,
     DIV2,
@@ -413,7 +408,7 @@ pub(crate) unsafe fn init(config: Config) {
     RCC.apb1enr1().modify(|w| w.set_pwren(true));
 
     match config.rtc_mux {
-        RtcClockSource::LSE32 => {
+        RtcClockSource::LSE => {
             // 1. Unlock the backup domain
             PWR.cr1().modify(|w| w.set_dbp(true));
 
@@ -429,17 +424,18 @@ pub(crate) unsafe fn init(config: Config) {
             // Wait until LSE is running
             while !RCC.bdcr().read().lserdy() {}
 
-            Rtc::set_clock_source(RCS::LSE);
+            BackupDomain::set_rtc_clock_source(RtcClockSource::LSE);
         }
-        RtcClockSource::LSI32 => {
+        RtcClockSource::LSI => {
             // Turn on the internal 32 kHz LSI oscillator
             RCC.csr().modify(|w| w.set_lsion(true));
 
             // Wait until LSI is running
             while !RCC.csr().read().lsirdy() {}
 
-            Rtc::set_clock_source(RCS::LSI);
+            BackupDomain::set_rtc_clock_source(RtcClockSource::LSI);
         }
+        _ => unreachable!(),
     }
 
     let (sys_clk, sw) = match config.mux {
@@ -451,7 +447,7 @@ pub(crate) unsafe fn init(config: Config) {
                 w.set_msirgsel(true);
                 w.set_msion(true);
 
-                if let RtcClockSource::LSE32 = config.rtc_mux {
+                if let RtcClockSource::LSE = config.rtc_mux {
                     // If LSE is enabled, enable calibration of MSI
                     w.set_msipllen(true);
                 } else {

embassy-stm32/src/rcc/l5.rs

@@ -1,6 +1,6 @@
 use stm32_metapac::PWR;
 
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::rcc::vals::{Hpre, Msirange, Pllsrc, Ppre, Sw};
 use crate::pac::{FLASH, RCC};
 use crate::rcc::{set_freqs, Clocks};

embassy-stm32/src/rcc/mod.rs

@@ -1,9 +1,10 @@
 #![macro_use]
 
-pub mod common;
+pub(crate) mod bd;
-
+pub mod bus;
 use core::mem::MaybeUninit;
 
+pub use crate::rcc::bd::RtcClockSource;
 use crate::time::Hertz;
 
 #[cfg_attr(rcc_f0, path = "f0.rs")]
@@ -86,6 +87,8 @@ static CLOCK_REFCOUNT: AtomicU32 = AtomicU32::new(0);
 
 #[cfg(feature = "low-power")]
 pub fn low_power_ready() -> bool {
+    trace!("clock refcount: {}", CLOCK_REFCOUNT.load(Ordering::SeqCst));
+
     CLOCK_REFCOUNT.load(Ordering::SeqCst) == 0
 }
 

embassy-stm32/src/rcc/u5.rs

@@ -1,6 +1,6 @@
 use stm32_metapac::rcc::vals::{Msirange, Msirgsel, Pllm, Pllsrc, Sw};
 
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
 use crate::pac::{FLASH, RCC};
 use crate::rcc::{set_freqs, Clocks};
 use crate::time::Hertz;
@@ -11,7 +11,7 @@ pub const HSI_FREQ: Hertz = Hertz(16_000_000);
 /// LSI speed
 pub const LSI_FREQ: Hertz = Hertz(32_000);
 
-pub use super::common::VoltageScale;
+pub use super::bus::VoltageScale;
 
 #[derive(Copy, Clone)]
 pub enum ClockSrc {

embassy-stm32/src/rcc/wb.rs

@@ -1,6 +1,6 @@
-pub use super::common::{AHBPrescaler, APBPrescaler};
+pub use super::bus::{AHBPrescaler, APBPrescaler};
+use crate::rcc::bd::{BackupDomain, RtcClockSource};
 use crate::rcc::Clocks;
-use crate::rtc::{Rtc, RtcClockSource};
 use crate::time::{khz, mhz, Hertz};
 
 /// Most of clock setup is copied from stm32l0xx-hal, and adopted to the generated PAC,
@@ -375,5 +375,7 @@ pub(crate) fn configure_clocks(config: &Config) {
         w.set_shdhpre(config.ahb3_pre.into());
     });
 
-    config.rtc.map(|clock_source| Rtc::set_clock_source(clock_source));
+    config
+        .rtc
+        .map(|clock_source| BackupDomain::set_rtc_clock_source(clock_source));
 }

embassy-stm32/src/rcc/wl.rs

@@ -1,8 +1,7 @@
-pub use super::common::{AHBPrescaler, APBPrescaler, VoltageScale};
+pub use super::bus::{AHBPrescaler, APBPrescaler, VoltageScale};
-use crate::pac::pwr::vals::Dbp;
 use crate::pac::{FLASH, PWR, RCC};
+use crate::rcc::bd::{BackupDomain, RtcClockSource};
 use crate::rcc::{set_freqs, Clocks};
-use crate::rtc::{Rtc, RtcClockSource as RCS};
 use crate::time::Hertz;
 
 /// Most of clock setup is copied from stm32l0xx-hal, and adopted to the generated PAC,
@@ -130,16 +129,11 @@ impl Default for Config {
             apb2_pre: APBPrescaler::NotDivided,
             enable_lsi: false,
             enable_rtc_apb: false,
-            rtc_mux: RtcClockSource::LSI32,
+            rtc_mux: RtcClockSource::LSI,
         }
     }
 }
 
-pub enum RtcClockSource {
-    LSE32,
-    LSI32,
-}
-
 #[repr(u8)]
 pub enum Lsedrv {
     Low = 0,
@@ -215,9 +209,9 @@ pub(crate) unsafe fn init(config: Config) {
     while FLASH.acr().read().latency() != ws {}
 
     match config.rtc_mux {
-        RtcClockSource::LSE32 => {
+        RtcClockSource::LSE => {
             // 1. Unlock the backup domain
-            PWR.cr1().modify(|w| w.set_dbp(Dbp::ENABLED));
+            PWR.cr1().modify(|w| w.set_dbp(true));
 
             // 2. Setup the LSE
             RCC.bdcr().modify(|w| {
@@ -231,17 +225,18 @@ pub(crate) unsafe fn init(config: Config) {
             // Wait until LSE is running
             while !RCC.bdcr().read().lserdy() {}
 
-            Rtc::set_clock_source(RCS::LSE);
+            BackupDomain::set_rtc_clock_source(RtcClockSource::LSE);
         }
-        RtcClockSource::LSI32 => {
+        RtcClockSource::LSI => {
             // Turn on the internal 32 kHz LSI oscillator
             RCC.csr().modify(|w| w.set_lsion(true));
 
             // Wait until LSI is running
             while !RCC.csr().read().lsirdy() {}
 
-            Rtc::set_clock_source(RCS::LSI);
+            BackupDomain::set_rtc_clock_source(RtcClockSource::LSI);
         }
+        _ => unreachable!(),
     }
 
     match config.mux {
@@ -266,7 +261,7 @@ pub(crate) unsafe fn init(config: Config) {
                 w.set_msirange(range.into());
                 w.set_msion(true);
 
-                if let RtcClockSource::LSE32 = config.rtc_mux {
+                if let RtcClockSource::LSE = config.rtc_mux {
                     // If LSE is enabled, enable calibration of MSI
                     w.set_msipllen(true);
                 } else {

embassy-stm32/src/rtc/datetime.rs

@@ -89,7 +89,7 @@ pub enum DayOfWeek {
 #[cfg(feature = "chrono")]
 impl From<chrono::Weekday> for DayOfWeek {
     fn from(weekday: Weekday) -> Self {
-        day_of_week_from_u8(weekday.number_from_monday() as u8).unwrap()
+        day_of_week_from_u8(weekday.num_days_from_monday() as u8).unwrap()
     }
 }
 

embassy-stm32/src/rtc/mod.rs

@@ -1,7 +1,17 @@
 //! RTC peripheral abstraction
 mod datetime;
 
+#[cfg(feature = "low-power")]
+use core::cell::Cell;
+
+#[cfg(feature = "low-power")]
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+#[cfg(feature = "low-power")]
+use embassy_sync::blocking_mutex::Mutex;
+
 pub use self::datetime::{DateTime, DayOfWeek, Error as DateTimeError};
+use crate::rcc::bd::BackupDomain;
+pub use crate::rcc::RtcClockSource;
 
 /// refer to AN4759 to compare features of RTC2 and RTC3
 #[cfg_attr(any(rtc_v1), path = "v1.rs")]
@@ -30,22 +40,73 @@ pub enum RtcError {
     NotRunning,
 }
 
+#[cfg(feature = "low-power")]
+/// Represents an instant in time that can be substracted to compute a duration
+struct RtcInstant {
+    second: u8,
+    subsecond: u16,
+}
+
+#[cfg(feature = "low-power")]
+impl RtcInstant {
+    pub fn now() -> Self {
+        let tr = RTC::regs().tr().read();
+        let tr2 = RTC::regs().tr().read();
+        let ssr = RTC::regs().ssr().read().ss();
+        let ssr2 = RTC::regs().ssr().read().ss();
+
+        let st = bcd2_to_byte((tr.st(), tr.su()));
+        let st2 = bcd2_to_byte((tr2.st(), tr2.su()));
+
+        assert!(st == st2);
+        assert!(ssr == ssr2);
+
+        let _ = RTC::regs().dr().read();
+
+        let subsecond = ssr;
+        let second = st;
+
+        // trace!("rtc: instant now: st, ssr: {}, {}", st, ssr);
+
+        Self { second, subsecond }
+    }
+}
+
+#[cfg(feature = "low-power")]
+impl core::ops::Sub for RtcInstant {
+    type Output = embassy_time::Duration;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        use embassy_time::{Duration, TICK_HZ};
+
+        let second = if self.second < rhs.second {
+            self.second + 60
+        } else {
+            self.second
+        };
+
+        // TODO: read prescaler
+
+        let self_ticks = second as u32 * 256 + (255 - self.subsecond as u32);
+        let other_ticks = rhs.second as u32 * 256 + (255 - rhs.subsecond as u32);
+        let rtc_ticks = self_ticks - other_ticks;
+
+        //        trace!(
+        //            "rtc: instant sub: self, other, rtc ticks: {}, {}, {}",
+        //            self_ticks,
+        //            other_ticks,
+        //            rtc_ticks
+        //        );
+
+        Duration::from_ticks(((rtc_ticks * TICK_HZ as u32) / 256u32) as u64)
+    }
+}
+
 /// RTC Abstraction
 pub struct Rtc {
     rtc_config: RtcConfig,
-}
+    #[cfg(feature = "low-power")]
-
+    stop_time: Mutex<CriticalSectionRawMutex, Cell<Option<RtcInstant>>>,
-#[derive(Copy, Clone, Debug, PartialEq)]
-#[repr(u8)]
-pub enum RtcClockSource {
-    /// 00: No clock
-    NoClock = 0b00,
-    /// 01: LSE oscillator clock used as RTC clock
-    LSE = 0b01,
-    /// 10: LSI oscillator clock used as RTC clock
-    LSI = 0b10,
-    /// 11: HSE oscillator clock divided by 32 used as RTC clock
-    HSE = 0b11,
 }
 
 #[derive(Copy, Clone, PartialEq)]
@@ -108,9 +169,16 @@ impl Rtc {
     pub fn new(_rtc: impl Peripheral<P = RTC>, rtc_config: RtcConfig) -> Self {
         RTC::enable_peripheral_clk();
 
+        #[cfg(not(feature = "low-power"))]
         let mut rtc_struct = Self { rtc_config };
 
-        Self::enable();
+        #[cfg(feature = "low-power")]
+        let mut rtc_struct = Self {
+            rtc_config,
+            stop_time: Mutex::const_new(CriticalSectionRawMutex::new(), Cell::new(None)),
+        };
+
+        BackupDomain::enable_rtc();
 
         rtc_struct.configure(rtc_config);
         rtc_struct.rtc_config = rtc_config;

embassy-stm32/src/rtc/v2.rs

@@ -1,67 +1,12 @@
 use stm32_metapac::rtc::vals::{Init, Osel, Pol};
 
-use super::{sealed, RtcClockSource, RtcConfig};
+#[cfg(feature = "low-power")]
+use super::RtcInstant;
+use super::{sealed, RtcConfig};
 use crate::pac::rtc::Rtc;
 use crate::peripherals::RTC;
 use crate::rtc::sealed::Instance;
 
-#[cfg(all(feature = "time", any(stm32wb, stm32f4)))]
-pub struct RtcInstant {
-    ssr: u16,
-    st: u8,
-}
-
-#[cfg(all(feature = "time", any(stm32wb, stm32f4)))]
-impl RtcInstant {
-    pub fn now() -> Self {
-        // TODO: read value twice
-        use crate::rtc::bcd2_to_byte;
-
-        let tr = RTC::regs().tr().read();
-        let tr2 = RTC::regs().tr().read();
-        let ssr = RTC::regs().ssr().read().ss();
-        let ssr2 = RTC::regs().ssr().read().ss();
-
-        let st = bcd2_to_byte((tr.st(), tr.su()));
-        let st2 = bcd2_to_byte((tr2.st(), tr2.su()));
-
-        assert!(st == st2);
-        assert!(ssr == ssr2);
-
-        let _ = RTC::regs().dr().read();
-
-        trace!("ssr: {}", ssr);
-        trace!("st: {}", st);
-
-        Self { ssr, st }
-    }
-}
-
-#[cfg(all(feature = "time", any(stm32wb, stm32f4)))]
-impl core::ops::Sub for RtcInstant {
-    type Output = embassy_time::Duration;
-
-    fn sub(self, rhs: Self) -> Self::Output {
-        use embassy_time::{Duration, TICK_HZ};
-
-        let st = if self.st < rhs.st { self.st + 60 } else { self.st };
-
-        // TODO: read prescaler
-
-        let self_ticks = st as u32 * 256 + (255 - self.ssr as u32);
-        let other_ticks = rhs.st as u32 * 256 + (255 - rhs.ssr as u32);
-        let rtc_ticks = self_ticks - other_ticks;
-
-        trace!("self, other, rtc ticks: {}, {}, {}", self_ticks, other_ticks, rtc_ticks);
-
-        Duration::from_ticks(
-            ((((st as u32 * 256 + (255u32 - self.ssr as u32)) - (rhs.st as u32 * 256 + (255u32 - rhs.ssr as u32)))
-                * TICK_HZ as u32) as u32
-                / 256u32) as u64,
-        )
-    }
-}
-
 #[allow(dead_code)]
 #[derive(Clone, Copy, Debug)]
 pub(crate) enum WakeupPrescaler {
@@ -128,31 +73,10 @@ impl WakeupPrescaler {
 }
 
 impl super::Rtc {
-    fn unlock_registers() {
+    #[cfg(feature = "low-power")]
-        #[cfg(any(rtc_v2f2, rtc_v2f3, rtc_v2l1))]
+    /// start the wakeup alarm and wtih a duration that is as close to but less than
-        let cr = crate::pac::PWR.cr();
+    /// the requested duration, and record the instant the wakeup alarm was started
-        #[cfg(any(rtc_v2f4, rtc_v2f7, rtc_v2h7, rtc_v2l4, rtc_v2wb))]
+    pub(crate) fn start_wakeup_alarm(&self, requested_duration: embassy_time::Duration) {
-        let cr = crate::pac::PWR.cr1();
-
-        // TODO: Missing from PAC for l0 and f0?
-        #[cfg(not(any(rtc_v2f0, rtc_v2l0)))]
-        {
-            if !cr.read().dbp() {
-                cr.modify(|w| w.set_dbp(true));
-                while !cr.read().dbp() {}
-            }
-        }
-    }
-
-    #[allow(dead_code)]
-    #[cfg(all(feature = "time", any(stm32wb, stm32f4)))]
-    /// start the wakeup alarm and return the actual duration of the alarm
-    /// the actual duration will be the closest value possible that is less
-    /// than the requested duration.
-    ///
-    /// note: this api is exposed for testing purposes until low power is implemented.
-    /// it is not intended to be public
-    pub(crate) fn start_wakeup_alarm(&self, requested_duration: embassy_time::Duration) -> RtcInstant {
         use embassy_time::{Duration, TICK_HZ};
 
         use crate::rcc::get_freqs;
@@ -174,100 +98,45 @@ impl super::Rtc {
             rtc_ticks as u64 * TICK_HZ * (<WakeupPrescaler as Into<u32>>::into(prescaler) as u64) / rtc_hz,
         );
 
-        trace!("set wakeup timer for {} ms", duration.as_millis());
-
         self.write(false, |regs| {
-            regs.cr().modify(|w| w.set_wutie(true));
-
             regs.cr().modify(|w| w.set_wute(false));
             regs.isr().modify(|w| w.set_wutf(false));
             while !regs.isr().read().wutwf() {}
 
             regs.cr().modify(|w| w.set_wucksel(prescaler.into()));
             regs.cr().modify(|w| w.set_wute(true));
+            regs.cr().modify(|w| w.set_wutie(true));
         });
 
-        RtcInstant::now()
+        trace!("rtc: start wakeup alarm for {} ms", duration.as_millis());
+
+        critical_section::with(|cs| assert!(self.stop_time.borrow(cs).replace(Some(RtcInstant::now())).is_none()))
     }
 
-    #[allow(dead_code)]
+    #[cfg(feature = "low-power")]
-    #[cfg(all(feature = "time", any(stm32wb, stm32f4)))]
+    /// stop the wakeup alarm and return the time elapsed since `start_wakeup_alarm`
-    /// stop the wakeup alarm and return the time remaining
+    /// was called, otherwise none
-    ///
+    pub(crate) fn stop_wakeup_alarm(&self) -> Option<embassy_time::Duration> {
-    /// note: this api is exposed for testing purposes until low power is implemented.
+        use crate::interrupt::typelevel::Interrupt;
-    /// it is not intended to be public
+
-    pub(crate) fn stop_wakeup_alarm(&self) -> RtcInstant {
+        trace!("rtc: stop wakeup alarm...");
-        trace!("disable wakeup timer...");
 
         self.write(false, |regs| {
+            regs.cr().modify(|w| w.set_wutie(false));
             regs.cr().modify(|w| w.set_wute(false));
             regs.isr().modify(|w| w.set_wutf(false));
+
+            crate::pac::EXTI.pr(0).modify(|w| w.set_line(22, true));
+            crate::interrupt::typelevel::RTC_WKUP::unpend();
         });
 
-        RtcInstant::now()
+        critical_section::with(|cs| {
-    }
+            if let Some(stop_time) = self.stop_time.borrow(cs).take() {
-
+                Some(RtcInstant::now() - stop_time)
-    #[allow(dead_code)]
+            } else {
-    pub(crate) fn set_clock_source(clock_source: RtcClockSource) {
+                None
-        #[cfg(not(rtc_v2wb))]
+            }
-        use stm32_metapac::rcc::vals::Rtcsel;
+        })
-
-        #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
-        let cr = crate::pac::RCC.bdcr();
-        #[cfg(any(rtc_v2l0, rtc_v2l1))]
-        let cr = crate::pac::RCC.csr();
-
-        Self::unlock_registers();
-
-        cr.modify(|w| {
-            // Select RTC source
-            #[cfg(not(rtc_v2wb))]
-            w.set_rtcsel(Rtcsel::from_bits(clock_source as u8));
-            #[cfg(rtc_v2wb)]
-            w.set_rtcsel(clock_source as u8);
-        });
-    }
-
-    pub(super) fn enable() {
-        #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
-        let reg = crate::pac::RCC.bdcr().read();
-        #[cfg(any(rtc_v2l0, rtc_v2l1))]
-        let reg = crate::pac::RCC.csr().read();
-
-        #[cfg(any(rtc_v2h7, rtc_v2l4, rtc_v2wb))]
-        assert!(!reg.lsecsson(), "RTC is not compatible with LSE CSS, yet.");
-
-        if !reg.rtcen() {
-            Self::unlock_registers();
-
-            #[cfg(not(any(rtc_v2l0, rtc_v2l1, rtc_v2f2)))]
-            crate::pac::RCC.bdcr().modify(|w| w.set_bdrst(true));
-            #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
-            let cr = crate::pac::RCC.bdcr();
-            #[cfg(any(rtc_v2l0, rtc_v2l1))]
-            let cr = crate::pac::RCC.csr();
-
-            cr.modify(|w| {
-                // Reset
-                #[cfg(not(any(rtc_v2l0, rtc_v2l1)))]
-                w.set_bdrst(false);
-
-                w.set_rtcen(true);
-                w.set_rtcsel(reg.rtcsel());
-
-                // Restore bcdr
-                #[cfg(any(rtc_v2l4, rtc_v2wb))]
-                w.set_lscosel(reg.lscosel());
-                #[cfg(any(rtc_v2l4, rtc_v2wb))]
-                w.set_lscoen(reg.lscoen());
-
-                w.set_lseon(reg.lseon());
-
-                #[cfg(any(rtc_v2f0, rtc_v2f7, rtc_v2h7, rtc_v2l4, rtc_v2wb))]
-                w.set_lsedrv(reg.lsedrv());
-                w.set_lsebyp(reg.lsebyp());
-            });
-        }
     }
 
     /// Applies the RTC config

embassy-stm32/src/rtc/v3.rs

@@ -1,74 +1,11 @@
 use stm32_metapac::rtc::vals::{Calp, Calw16, Calw8, Fmt, Init, Key, Osel, Pol, TampalrmPu, TampalrmType};
 
-use super::{sealed, RtcCalibrationCyclePeriod, RtcClockSource, RtcConfig};
+use super::{sealed, RtcCalibrationCyclePeriod, RtcConfig};
 use crate::pac::rtc::Rtc;
 use crate::peripherals::RTC;
 use crate::rtc::sealed::Instance;
 
 impl super::Rtc {
-    fn unlock_registers() {
-        // Unlock the backup domain
-        #[cfg(not(any(rtc_v3u5, rcc_wl5, rcc_wle)))]
-        {
-            if !crate::pac::PWR.cr1().read().dbp() {
-                crate::pac::PWR.cr1().modify(|w| w.set_dbp(true));
-                while !crate::pac::PWR.cr1().read().dbp() {}
-            }
-        }
-        #[cfg(any(rcc_wl5, rcc_wle))]
-        {
-            use crate::pac::pwr::vals::Dbp;
-
-            if crate::pac::PWR.cr1().read().dbp() != Dbp::ENABLED {
-                crate::pac::PWR.cr1().modify(|w| w.set_dbp(Dbp::ENABLED));
-                while crate::pac::PWR.cr1().read().dbp() != Dbp::ENABLED {}
-            }
-        }
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn set_clock_source(clock_source: RtcClockSource) {
-        let clock_source = clock_source as u8;
-        #[cfg(not(any(rcc_wl5, rcc_wle)))]
-        let clock_source = crate::pac::rcc::vals::Rtcsel::from_bits(clock_source);
-
-        Self::unlock_registers();
-
-        crate::pac::RCC.bdcr().modify(|w| {
-            // Select RTC source
-            w.set_rtcsel(clock_source);
-        });
-    }
-
-    pub(super) fn enable() {
-        let bdcr = crate::pac::RCC.bdcr();
-
-        let reg = bdcr.read();
-        assert!(!reg.lsecsson(), "RTC is not compatible with LSE CSS, yet.");
-
-        if !reg.rtcen() {
-            Self::unlock_registers();
-
-            bdcr.modify(|w| w.set_bdrst(true));
-
-            bdcr.modify(|w| {
-                // Reset
-                w.set_bdrst(false);
-
-                w.set_rtcen(true);
-                w.set_rtcsel(reg.rtcsel());
-
-                // Restore bcdr
-                w.set_lscosel(reg.lscosel());
-                w.set_lscoen(reg.lscoen());
-
-                w.set_lseon(reg.lseon());
-                w.set_lsedrv(reg.lsedrv());
-                w.set_lsebyp(reg.lsebyp());
-            });
-        }
-    }
-
     /// Applies the RTC config
     /// It this changes the RTC clock source the time will be reset
     pub(super) fn configure(&mut self, rtc_config: RtcConfig) {

embassy-stm32/src/time_driver.rs

@@ -14,6 +14,8 @@ use stm32_metapac::timer::regs;
 use crate::interrupt::typelevel::Interrupt;
 use crate::pac::timer::vals;
 use crate::rcc::sealed::RccPeripheral;
+#[cfg(feature = "low-power")]
+use crate::rtc::Rtc;
 use crate::timer::sealed::{Basic16bitInstance as BasicInstance, GeneralPurpose16bitInstance as Instance};
 use crate::{interrupt, peripherals};
 
@@ -130,12 +132,14 @@ impl AlarmState {
     }
 }
 
-struct RtcDriver {
+pub(crate) struct RtcDriver {
     /// Number of 2^15 periods elapsed since boot.
     period: AtomicU32,
     alarm_count: AtomicU8,
     /// Timestamp at which to fire alarm. u64::MAX if no alarm is scheduled.
     alarms: Mutex<CriticalSectionRawMutex, [AlarmState; ALARM_COUNT]>,
+    #[cfg(feature = "low-power")]
+    rtc: Mutex<CriticalSectionRawMutex, Cell<Option<&'static Rtc>>>,
 }
 
 const ALARM_STATE_NEW: AlarmState = AlarmState::new();
@@ -144,6 +148,8 @@ embassy_time::time_driver_impl!(static DRIVER: RtcDriver = RtcDriver {
     period: AtomicU32::new(0),
     alarm_count: AtomicU8::new(0),
     alarms: Mutex::const_new(CriticalSectionRawMutex::new(), [ALARM_STATE_NEW; ALARM_COUNT]),
+    #[cfg(feature = "low-power")]
+    rtc: Mutex::const_new(CriticalSectionRawMutex::new(), Cell::new(None)),
 });
 
 impl RtcDriver {
@@ -259,6 +265,117 @@ impl RtcDriver {
         let f: fn(*mut ()) = unsafe { mem::transmute(alarm.callback.get()) };
         f(alarm.ctx.get());
     }
+
+    #[cfg(feature = "low-power")]
+    /// Set the rtc but panic if it's already been set
+    pub(crate) fn set_rtc(&self, rtc: &'static Rtc) {
+        critical_section::with(|cs| assert!(self.rtc.borrow(cs).replace(Some(rtc)).is_none()));
+    }
+
+    #[cfg(feature = "low-power")]
+    /// Compute the approximate amount of time until the next alarm
+    fn time_until_next_alarm(&self) -> embassy_time::Duration {
+        critical_section::with(|cs| {
+            let now = self.now() + 32;
+
+            embassy_time::Duration::from_ticks(
+                self.alarms
+                    .borrow(cs)
+                    .iter()
+                    .map(|alarm: &AlarmState| alarm.timestamp.get().saturating_sub(now))
+                    .min()
+                    .unwrap_or(u64::MAX),
+            )
+        })
+    }
+
+    #[cfg(feature = "low-power")]
+    /// Add the given offset to the current time
+    fn add_time(&self, offset: embassy_time::Duration) {
+        let offset = offset.as_ticks();
+        let cnt = T::regs_gp16().cnt().read().cnt() as u32;
+        let period = self.period.load(Ordering::SeqCst);
+
+        // Correct the race, if it exists
+        let period = if period & 1 == 1 && cnt < u16::MAX as u32 / 2 {
+            period + 1
+        } else {
+            period
+        };
+
+        // Normalize to the full overflow
+        let period = (period / 2) * 2;
+
+        // Add the offset
+        let period = period + 2 * (offset / u16::MAX as u64) as u32;
+        let cnt = cnt + (offset % u16::MAX as u64) as u32;
+
+        let (cnt, period) = if cnt > u16::MAX as u32 {
+            (cnt - u16::MAX as u32, period + 2)
+        } else {
+            (cnt, period)
+        };
+
+        let period = if cnt > u16::MAX as u32 / 2 { period + 1 } else { period };
+
+        self.period.store(period, Ordering::SeqCst);
+        T::regs_gp16().cnt().write(|w| w.set_cnt(cnt as u16));
+
+        // Now, recompute all alarms
+        critical_section::with(|cs| {
+            for i in 0..ALARM_COUNT {
+                let alarm_handle = unsafe { AlarmHandle::new(i as u8) };
+                let alarm = self.get_alarm(cs, alarm_handle);
+
+                self.set_alarm(alarm_handle, alarm.timestamp.get());
+            }
+        })
+    }
+
+    #[cfg(feature = "low-power")]
+    /// Stop the wakeup alarm, if enabled, and add the appropriate offset
+    fn stop_wakeup_alarm(&self) {
+        critical_section::with(|cs| {
+            if let Some(offset) = self.rtc.borrow(cs).get().unwrap().stop_wakeup_alarm() {
+                self.add_time(offset);
+            }
+        });
+    }
+
+    #[cfg(feature = "low-power")]
+    /// Pause the timer if ready; return err if not
+    pub(crate) fn pause_time(&self) -> Result<(), ()> {
+        /*
+            If the wakeup timer is currently running, then we need to stop it and
+            add the elapsed time to the current time
+        */
+        self.stop_wakeup_alarm();
+
+        let time_until_next_alarm = self.time_until_next_alarm();
+        if time_until_next_alarm < embassy_time::Duration::from_millis(250) {
+            Err(())
+        } else {
+            critical_section::with(|cs| {
+                self.rtc
+                    .borrow(cs)
+                    .get()
+                    .unwrap()
+                    .start_wakeup_alarm(time_until_next_alarm);
+            });
+
+            T::regs_gp16().cr1().modify(|w| w.set_cen(false));
+
+            Ok(())
+        }
+    }
+
+    #[cfg(feature = "low-power")]
+    /// Resume the timer with the given offset
+    pub(crate) fn resume_time(&self) {
+        self.stop_wakeup_alarm();
+
+        T::regs_gp16().cr1().modify(|w| w.set_cen(true));
+    }
 }
 
 impl Driver for RtcDriver {
@@ -329,6 +446,11 @@ impl Driver for RtcDriver {
     }
 }
 
+#[cfg(feature = "low-power")]
+pub(crate) fn get_driver() -> &'static RtcDriver {
+    &DRIVER
+}
+
 pub(crate) fn init() {
     DRIVER.init()
 }

embassy-time/CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.1.3 - 2023-08-28
+
+- Update `embedded-hal-async` to `1.0.0-rc.1`
+- Update `embedded-hal v1` to `1.0.0-rc.1`
+
 ## 0.1.2 - 2023-07-05
 
 - Update `embedded-hal-async` to `0.2.0-alpha.2`.

embassy-time/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "embassy-time"
-version = "0.1.2"
+version = "0.1.3"
 edition = "2021"
 description = "Instant and Duration for embedded no-std systems, with async timer support"
 repository = "https://github.com/embassy-rs/embassy"

examples/boot/application/nrf/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers", "arch-cortex-m", "executor-thread"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly"] }
 embassy-nrf = { version = "0.1.0", path = "../../../../embassy-nrf", features = ["time-driver-rtc1", "gpiote", "nightly"] }
 embassy-boot = { version = "0.1.0", path = "../../../../embassy-boot/boot", features = ["nightly"] }
 embassy-boot-nrf = { version = "0.1.0", path = "../../../../embassy-boot/nrf", features = ["nightly"] }

examples/boot/application/rp/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers", "arch-cortex-m", "executor-thread"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly"] }
 embassy-rp = { version = "0.1.0", path = "../../../../embassy-rp", features = ["time-driver", "unstable-traits", "nightly"] }
 embassy-boot-rp = { version = "0.1.0", path = "../../../../embassy-boot/rp", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32f3/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32f303re", "time-driver-any", "exti"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32f7/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32f767zi", "time-driver-any", "exti"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32h7/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32h743zi", "time-driver-any", "exti"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32l0/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32l072cz", "time-driver-any", "exti", "memory-x"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32l1/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32l151cb-a", "time-driver-any", "exti"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32l4/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32l475vg", "time-driver-any", "exti"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/boot/application/stm32wl/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../../../embassy-time", features = ["nightly", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../../../embassy-stm32", features = ["unstable-traits", "nightly", "stm32wl55jc-cm4", "time-driver-any", "exti"]  }
 embassy-boot-stm32 = { version = "0.1.0", path = "../../../../embassy-boot/stm32", features = ["nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../../../embassy-embedded-hal" }

examples/nrf-rtos-trace/Cargo.toml

@@ -18,7 +18,7 @@ log = [
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "rtos-trace", "rtos-trace-interrupt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time" }
+embassy-time = { version = "0.1.3", path = "../../embassy-time" }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac"] }
 
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }

examples/nrf52840-rtic/Cargo.toml

@@ -9,7 +9,7 @@ rtic = { version = "2", features = ["thumbv7-backend"] }
 
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime", "generic-queue"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime", "generic-queue"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["nightly", "unstable-traits", "defmt", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac", "time"] }
 
 defmt = "0.3"

examples/nrf52840/Cargo.toml

@@ -31,7 +31,7 @@ nightly = [
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac", "time"] }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet"], optional = true }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt", "msos-descriptor",], optional = true }

examples/nrf5340/Cargo.toml

@@ -14,7 +14,7 @@ embassy-executor = { version = "0.3.0", path = "../../embassy-executor", feature
     "defmt",
     "integrated-timers",
 ] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = [
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = [
     "defmt",
     "defmt-timestamp-uptime",
 ] }

examples/rp/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal", features = ["defmt"] }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime"] }
 embassy-rp = { version = "0.1.0", path = "../../embassy-rp", features = ["defmt", "unstable-traits", "nightly", "unstable-pac", "time-driver", "critical-section-impl"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "udp", "dhcpv4", "medium-ethernet"] }

examples/std/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["log"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-std", "executor-thread", "log", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["log", "std", "nightly"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["log", "std", "nightly"] }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features=[ "std", "nightly", "log", "medium-ethernet", "medium-ip", "tcp", "udp", "dns", "dhcpv4", "proto-ipv6"] }
 embassy-net-tuntap = { version = "0.1.0", path = "../../embassy-net-tuntap" }
 embassy-net-ppp = { version = "0.1.0", path = "../../embassy-net-ppp", features = ["log"]}

examples/stm32c0/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32c031c6", "memory-x", "unstable-pac", "exti"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 
 defmt = "0.3"
 defmt-rtt = "0.4"

examples/stm32f0/Cargo.toml

@@ -16,7 +16,7 @@ defmt-rtt = "0.4"
 panic-probe = "0.3"
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 static_cell = { version = "1.1", features = ["nightly"]}
 
 [profile.release]

examples/stm32f1/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f103c8", "unstable-pac", "memory-x", "time-driver-any", "unstable-traits" ]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 

examples/stm32f2/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f207zg", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 
 defmt = "0.3"
 defmt-rtt = "0.4"

examples/stm32f3/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f303ze", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 

examples/stm32f4/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "unstable-traits", "defmt", "stm32f429zi", "unstable-pac", "memory-x", "time-driver-any", "exti", "embedded-sdmmc", "chrono"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "nightly"] }
 

examples/stm32f4/src/bin/rtc.rs

@@ -5,13 +5,17 @@
 use chrono::{NaiveDate, NaiveDateTime};
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_stm32::rtc::{Rtc, RtcConfig};
+use embassy_stm32::rtc::{Rtc, RtcClockSource, RtcConfig};
+use embassy_stm32::Config;
 use embassy_time::{Duration, Timer};
 use {defmt_rtt as _, panic_probe as _};
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(Default::default());
+    let mut config = Config::default();
+    config.rcc.rtc = Option::Some(RtcClockSource::LSI);
+    let p = embassy_stm32::init(config);
+
     info!("Hello World!");
 
     let now = NaiveDate::from_ymd_opt(2020, 5, 15)
@@ -23,8 +27,11 @@ async fn main(_spawner: Spawner) {
 
     rtc.set_datetime(now.into()).expect("datetime not set");
 
-    // In reality the delay would be much longer
+    loop {
-    Timer::after(Duration::from_millis(20000)).await;
+        let now: NaiveDateTime = rtc.now().unwrap().into();
 
-    let _then: NaiveDateTime = rtc.now().unwrap().into();
+        info!("{}", now.timestamp());
+
+        Timer::after(Duration::from_millis(1000)).await;
+    }
 }

examples/stm32f7/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f767zi", "memory-x", "unstable-pac", "time-driver-any", "exti"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-net = { path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet"] }
 embedded-io-async = { version = "0.5.0" }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }

examples/stm32g0/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32g071rb", "memory-x", "unstable-pac", "exti"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 
 defmt = "0.3"
 defmt-rtt = "0.4"

examples/stm32g4/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32g491re", "memory-x", "unstable-pac", "exti"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 
 defmt = "0.3"

examples/stm32h5/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32h563zi", "memory-x", "time-driver-any", "exti", "unstable-pac", "unstable-traits"] }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
 embassy-net = { path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6"] }
 embedded-io-async = { version = "0.5.0" }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }

examples/stm32h7/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32h743bi", "time-driver-any", "exti", "memory-x", "unstable-pac", "unstable-traits"] }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
 embassy-net = { path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6"] }
 embedded-io-async = { version = "0.5.0" }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }

examples/stm32l0/Cargo.toml

@@ -14,7 +14,7 @@ nightly = ["embassy-stm32/nightly", "embassy-time/nightly", "embassy-time/unstab
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32l072cz", "time-driver-any", "exti", "unstable-traits", "memory-x"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["time", "defmt"], optional = true }
 lora-phy = { version = "1", optional = true }
 lorawan-device = { version = "0.10.0", default-features = false, features = ["async", "external-lora-phy"], optional = true }

examples/stm32l1/Cargo.toml

@@ -7,7 +7,7 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32l151cb-a", "time-driver-any", "memory-x"]  }
 
 defmt = "0.3"

examples/stm32l4/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32l4s5qi", "memory-x", "time-driver-any", "exti", "unstable-traits", "chrono"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768", "unstable-traits", "nightly"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768", "unstable-traits", "nightly"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal" }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-net-adin1110 = { version = "0.1.0", path = "../../embassy-net-adin1110", default-features = false }

examples/stm32l4/src/bin/rtc.rs

@@ -23,7 +23,7 @@ async fn main(_spawner: Spawner) {
             PLLMul::Mul20,
             None,
         );
-        config.rcc.rtc_mux = rcc::RtcClockSource::LSE32;
+        config.rcc.rtc_mux = rcc::RtcClockSource::LSE;
         embassy_stm32::init(config)
     };
     info!("Hello World!");

examples/stm32l4/src/bin/spe_adin1110_http_server.rs

@@ -84,7 +84,7 @@ async fn main(spawner: Spawner) {
         None,
     );
     config.rcc.hsi48 = true; // needed for rng
-    config.rcc.rtc_mux = rcc::RtcClockSource::LSI32;
+    config.rcc.rtc_mux = rcc::RtcClockSource::LSI;
 
     let dp = embassy_stm32::init(config);
 

examples/stm32l5/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32l552ze", "time-driver-any", "exti", "unstable-traits", "memory-x"]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "dhcpv4", "medium-ethernet"] }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }

examples/stm32u5/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32u585ai", "time-driver-any", "memory-x" ]  }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
 
 defmt = "0.3"

examples/stm32wb/Cargo.toml

@@ -10,7 +10,7 @@ embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["
 embassy-stm32-wpan = { version = "0.1.0", path = "../../embassy-stm32-wpan", features = ["defmt", "stm32wb55rg"] }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "udp", "proto-ipv6", "medium-ieee802154", "nightly"], optional=true }
 
 defmt = "0.3"

examples/stm32wl/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "unstable-traits", "defmt", "stm32wl55jc-cm4", "time-driver-any", "memory-x", "unstable-pac", "exti", "chrono"] }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["nightly", "unstable-traits", "defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
 embassy-embedded-hal = { version = "0.1.0", path = "../../embassy-embedded-hal" }
 embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["stm32wl", "time", "defmt"] }
 lora-phy = { version = "1" }

examples/stm32wl/src/bin/rtc.rs

@@ -5,8 +5,8 @@
 use chrono::{NaiveDate, NaiveDateTime};
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_stm32::rcc::{self, ClockSrc};
+use embassy_stm32::rcc::ClockSrc;
-use embassy_stm32::rtc::{Rtc, RtcConfig};
+use embassy_stm32::rtc::{Rtc, RtcClockSource, RtcConfig};
 use embassy_stm32::Config;
 use embassy_time::{Duration, Timer};
 use {defmt_rtt as _, panic_probe as _};
@@ -16,7 +16,7 @@ async fn main(_spawner: Spawner) {
     let p = {
         let mut config = Config::default();
         config.rcc.mux = ClockSrc::HSE32;
-        config.rcc.rtc_mux = rcc::RtcClockSource::LSE32;
+        config.rcc.rtc_mux = RtcClockSource::LSE;
         config.rcc.enable_rtc_apb = true;
         embassy_stm32::init(config)
     };

examples/wasm/Cargo.toml

@@ -10,7 +10,7 @@ crate-type = ["cdylib"]
 [dependencies]
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["log"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-wasm", "executor-thread", "log", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["log", "wasm", "nightly"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["log", "wasm", "nightly"] }
 
 wasm-logger = "0.2.0"
 wasm-bindgen = "0.2"

tests/nrf/Cargo.toml

@@ -10,7 +10,7 @@ teleprobe-meta = "1"
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt", "nightly"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "nightly", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "nightly", "unstable-traits", "defmt-timestamp-uptime"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "nightly", "unstable-traits", "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nightly", "unstable-traits", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac"] }
 embedded-io-async = { version = "0.5.0" }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "nightly"] }

tests/riscv32/Cargo.toml

@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 critical-section = { version = "1.1.1", features = ["restore-state-bool"] }
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync" }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["arch-riscv32", "nightly", "executor-thread"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time" }
+embassy-time = { version = "0.1.3", path = "../../embassy-time" }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 
 riscv-rt = "0.11"

tests/rp/Cargo.toml

@@ -9,7 +9,7 @@ teleprobe-meta = "1.1"
 
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "nightly", "unstable-traits"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "nightly", "unstable-traits"] }
 embassy-rp = { version = "0.1.0", path = "../../embassy-rp", features = ["nightly", "defmt", "unstable-pac", "unstable-traits", "time-driver", "critical-section-impl", "intrinsics", "rom-v2-intrinsics", "run-from-ram"]  }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "nightly", "tcp", "udp", "dhcpv4", "medium-ethernet"] }

tests/stm32/Cargo.toml

@@ -7,7 +7,7 @@ autobins = false
 
 [features]
 stm32f103c8 = ["embassy-stm32/stm32f103c8", "not-gpdma"]     # Blue Pill
-stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "can", "not-gpdma", "dac-adc-pin"]     # Nucleo "sdmmc"
+stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "stop", "can", "not-gpdma", "dac-adc-pin"]     # Nucleo "sdmmc"
 stm32g071rb = ["embassy-stm32/stm32g071rb", "not-gpdma", "dac-adc-pin"]     # Nucleo
 stm32c031c6 = ["embassy-stm32/stm32c031c6", "not-gpdma"]     # Nucleo
 stm32g491re = ["embassy-stm32/stm32g491re", "not-gpdma"]     # Nucleo
@@ -17,6 +17,7 @@ stm32h563zi = ["embassy-stm32/stm32h563zi"]     # Nucleo
 stm32u585ai = ["embassy-stm32/stm32u585ai"]     # IoT board
 
 sdmmc = []
+stop = ["embassy-stm32/low-power"]
 chrono = ["embassy-stm32/chrono", "dep:chrono"]
 can = []
 ble = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/ble"]
@@ -30,7 +31,7 @@ teleprobe-meta = "1"
 
 embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
-embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "tick-hz-32_768", "defmt-timestamp-uptime"] }
+embassy-time = { version = "0.1.3", path = "../../embassy-time", features = ["defmt", "tick-hz-32_768", "defmt-timestamp-uptime"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "memory-x", "time-driver-any"]  }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 embassy-stm32-wpan = { version = "0.1.0", path = "../../embassy-stm32-wpan", optional = true, features = ["defmt", "stm32wb55rg", "ble"] }
@@ -47,6 +48,7 @@ micromath = "2.0.0"
 panic-probe = { version = "0.3.0", features = ["print-defmt"] }
 rand_core = { version = "0.6", default-features = false }
 rand_chacha = { version = "0.3", default-features = false }
+static_cell = {version = "1.1", features = ["nightly"] }
 
 chrono = { version = "^0.4", default-features = false, optional = true}
 
@@ -87,6 +89,11 @@ name = "spi_dma"
 path = "src/bin/spi_dma.rs"
 required-features = []
 
+[[bin]]
+name = "stop"
+path = "src/bin/stop.rs"
+required-features = [ "stop", "chrono",]
+
 [[bin]]
 name = "timer"
 path = "src/bin/timer.rs"

tests/stm32/src/bin/rtc.rs

@@ -10,7 +10,8 @@ use chrono::{NaiveDate, NaiveDateTime};
 use common::*;
 use defmt::assert;
 use embassy_executor::Spawner;
-use embassy_stm32::rtc::{Rtc, RtcClockSource, RtcConfig};
+use embassy_stm32::rcc::RtcClockSource;
+use embassy_stm32::rtc::{Rtc, RtcConfig};
 use embassy_time::{Duration, Timer};
 
 #[embassy_executor::main]

tests/stm32/src/bin/stop.rs

@@ -0,0 +1,54 @@
+// required-features: stop,chrono
+
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+#[path = "../common.rs"]
+mod common;
+
+use chrono::NaiveDate;
+use common::*;
+use cortex_m_rt::entry;
+use embassy_executor::Spawner;
+use embassy_stm32::low_power::{stop_with_rtc, Executor};
+use embassy_stm32::rcc::RtcClockSource;
+use embassy_stm32::rtc::{Rtc, RtcConfig};
+use embassy_time::{Duration, Timer};
+use static_cell::make_static;
+
+#[entry]
+fn main() -> ! {
+    let executor = Executor::take();
+    executor.run(|spawner| {
+        unwrap!(spawner.spawn(async_main(spawner)));
+    });
+}
+
+#[embassy_executor::task]
+async fn async_main(_spawner: Spawner) {
+    let mut config = config();
+
+    config.rcc.rtc = Some(RtcClockSource::LSI);
+
+    let p = embassy_stm32::init(config);
+    info!("Hello World!");
+
+    let now = NaiveDate::from_ymd_opt(2020, 5, 15)
+        .unwrap()
+        .and_hms_opt(10, 30, 15)
+        .unwrap();
+
+    let mut rtc = Rtc::new(p.RTC, RtcConfig::default());
+
+    rtc.set_datetime(now.into()).expect("datetime not set");
+
+    let rtc = make_static!(rtc);
+
+    stop_with_rtc(rtc);
+
+    info!("Waiting 5 seconds");
+    Timer::after(Duration::from_secs(5)).await;
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}