Merge #839

839: Misc LoRaWAN improvements r=lulf a=timokroeger

Trying too get `embassy-lora` running on a [LoRa-E5 Dev Board](https://wiki.seeedstudio.com/LoRa_E5_Dev_Board/).
I can see the join message arriving in the The Things Network console but the device does not receive the accept message yet.
Opening this PR anyway because I think there are some nice things to decouple the lora crate from the nucleo board.

`@lulf` Could you test if this PR breaks your LoRa setup? Marking as draft for the time being.

Co-authored-by: Timo Kröger <timokroeger93@gmail.com>
Co-authored-by: Ulf Lilleengen <lulf@redhat.com>

embassy-lora/Cargo.toml

@@ -18,6 +18,7 @@ flavors = [
 sx127x = []
 stm32wl = ["embassy-stm32", "embassy-stm32/subghz"]
 time = []
+defmt = ["dep:defmt", "lorawan/defmt", "lorawan-device/defmt"]
 
 [dependencies]
 
@@ -34,5 +35,5 @@ futures = { version = "0.3.17", default-features = false, features = [ "async-aw
 embedded-hal = { version = "0.2", features = ["unproven"] }
 bit_field = { version = "0.10" }
 
-lorawan-device = { version = "0.7.1", default-features = false, features = ["async"] }
+lorawan-device = { version = "0.8.0", default-features = false, features = ["async"] }
 lorawan = { version = "0.7.1", default-features = false }

embassy-lora/src/lib.rs

@@ -11,13 +11,35 @@ pub mod stm32wl;
 #[cfg(feature = "sx127x")]
 pub mod sx127x;
 
+#[cfg(feature = "time")]
+use embassy_time::{Duration, Instant, Timer};
+
 /// A convenience timer to use with the LoRaWAN crate
-pub struct LoraTimer;
+#[cfg(feature = "time")]
+pub struct LoraTimer {
+    start: Instant,
+}
+
+#[cfg(feature = "time")]
+impl LoraTimer {
+    pub fn new() -> Self {
+        Self { start: Instant::now() }
+    }
+}
 
 #[cfg(feature = "time")]
 impl lorawan_device::async_device::radio::Timer for LoraTimer {
+    fn reset(&mut self) {
+        self.start = Instant::now();
+    }
+
+    type AtFuture<'m> = impl core::future::Future<Output = ()> + 'm;
+    fn at<'m>(&'m mut self, millis: u64) -> Self::AtFuture<'m> {
+        Timer::at(self.start + Duration::from_millis(millis))
+    }
+
     type DelayFuture<'m> = impl core::future::Future<Output = ()> + 'm;
     fn delay_ms<'m>(&'m mut self, millis: u64) -> Self::DelayFuture<'m> {
-        embassy_time::Timer::after(embassy_time::Duration::from_millis(millis))
+        Timer::after(Duration::from_millis(millis))
     }
 }

embassy-lora/src/stm32wl/mod.rs

@@ -1,18 +1,17 @@
 //! A radio driver integration for the radio found on STM32WL family devices.
 use core::future::Future;
-use core::mem::MaybeUninit;
+use core::task::Poll;
 
-use embassy_hal_common::{into_ref, PeripheralRef};
+use embassy_hal_common::{into_ref, Peripheral, PeripheralRef};
 use embassy_stm32::dma::NoDma;
-use embassy_stm32::gpio::{AnyPin, Output};
+use embassy_stm32::interrupt::{Interrupt, InterruptExt, SUBGHZ_RADIO};
-use embassy_stm32::interrupt::{InterruptExt, SUBGHZ_RADIO};
 use embassy_stm32::subghz::{
-    CalibrateImage, CfgIrq, CodingRate, Error, HeaderType, Irq, LoRaBandwidth, LoRaModParams, LoRaPacketParams,
+    CalibrateImage, CfgIrq, CodingRate, Error, HeaderType, HseTrim, Irq, LoRaBandwidth, LoRaModParams,
-    LoRaSyncWord, Ocp, PaConfig, PaSel, PacketType, RampTime, RegMode, RfFreq, SpreadingFactor as SF, StandbyClk,
+    LoRaPacketParams, LoRaSyncWord, Ocp, PaConfig, PacketType, RegMode, RfFreq, SpreadingFactor as SF, StandbyClk,
     Status, SubGhz, TcxoMode, TcxoTrim, Timeout, TxParams,
 };
-use embassy_stm32::Peripheral;
+use embassy_sync::waitqueue::AtomicWaker;
-use embassy_sync::signal::Signal;
+use futures::future::poll_fn;
 use lorawan_device::async_device::radio::{Bandwidth, PhyRxTx, RfConfig, RxQuality, SpreadingFactor, TxConfig};
 use lorawan_device::async_device::Timings;
 
@@ -28,102 +27,52 @@ pub enum State {
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct RadioError;
 
-static IRQ: Signal<(Status, u16)> = Signal::new();
+static IRQ_WAKER: AtomicWaker = AtomicWaker::new();
-
-struct StateInner<'d> {
-    radio: SubGhz<'d, NoDma, NoDma>,
-    switch: RadioSwitch<'d>,
-}
-
-/// External state storage for the radio state
-pub struct SubGhzState<'a>(MaybeUninit<StateInner<'a>>);
-impl<'d> SubGhzState<'d> {
-    pub const fn new() -> Self {
-        Self(MaybeUninit::uninit())
-    }
-}
 
 /// The radio peripheral keeping the radio state and owning the radio IRQ.
-pub struct SubGhzRadio<'d> {
+pub struct SubGhzRadio<'d, RS> {
-    state: *mut StateInner<'d>,
+    radio: SubGhz<'d, NoDma, NoDma>,
-    _irq: PeripheralRef<'d, SUBGHZ_RADIO>,
+    switch: RS,
+    irq: PeripheralRef<'d, SUBGHZ_RADIO>,
 }
 
-impl<'d> SubGhzRadio<'d> {
+#[derive(Default)]
+#[non_exhaustive]
+pub struct SubGhzRadioConfig {
+    pub reg_mode: RegMode,
+    pub calibrate_image: CalibrateImage,
+    pub pa_config: PaConfig,
+    pub tx_params: TxParams,
+}
+
+impl<'d, RS: RadioSwitch> SubGhzRadio<'d, RS> {
     /// Create a new instance of a SubGhz radio for LoRaWAN.
-    ///
+    pub fn new(
-    /// # Safety
+        mut radio: SubGhz<'d, NoDma, NoDma>,
-    /// Do not leak self or futures
+        switch: RS,
-    pub unsafe fn new(
-        state: &'d mut SubGhzState<'d>,
-        radio: SubGhz<'d, NoDma, NoDma>,
-        switch: RadioSwitch<'d>,
         irq: impl Peripheral<P = SUBGHZ_RADIO> + 'd,
-    ) -> Self {
+        config: SubGhzRadioConfig,
+    ) -> Result<Self, RadioError> {
         into_ref!(irq);
 
-        let mut inner = StateInner { radio, switch };
+        radio.reset();
-        inner.radio.reset();
-
-        let state_ptr = state.0.as_mut_ptr();
-        state_ptr.write(inner);
 
         irq.disable();
-        irq.set_handler(|p| {
+        irq.set_handler(|_| {
-            // This is safe because we only get interrupts when configured for, so
+            IRQ_WAKER.wake();
-            // the radio will be awaiting on the signal at this point. If not, the ISR will
+            unsafe { SUBGHZ_RADIO::steal().disable() };
-            // anyway only adjust the state in the IRQ signal state.
-            let state = &mut *(p as *mut StateInner<'d>);
-            state.on_interrupt();
         });
-        irq.set_handler_context(state_ptr as *mut ());
-        irq.enable();
 
-        Self {
+        configure_radio(&mut radio, config)?;
-            state: state_ptr,
-            _irq: irq,
-        }
-    }
-}
 
-impl<'d> StateInner<'d> {
+        Ok(Self { radio, switch, irq })
-    /// Configure radio settings in preparation for TX or RX
-    pub(crate) fn configure(&mut self) -> Result<(), RadioError> {
-        trace!("Configuring STM32WL SUBGHZ radio");
-        self.radio.set_standby(StandbyClk::Rc)?;
-        let tcxo_mode = TcxoMode::new()
-            .set_txco_trim(TcxoTrim::Volts1pt7)
-            .set_timeout(Timeout::from_duration_sat(core::time::Duration::from_millis(40)));
-
-        self.radio.set_tcxo_mode(&tcxo_mode)?;
-        self.radio.set_regulator_mode(RegMode::Ldo)?;
-
-        self.radio.calibrate_image(CalibrateImage::ISM_863_870)?;
-
-        self.radio.set_buffer_base_address(0, 0)?;
-
-        self.radio
-            .set_pa_config(&PaConfig::new().set_pa_duty_cycle(0x1).set_hp_max(0x0).set_pa(PaSel::Lp))?;
-
-        self.radio.set_pa_ocp(Ocp::Max140m)?;
-
-        //        let tx_params = TxParams::LP_14.set_ramp_time(RampTime::Micros40);
-        self.radio
-            .set_tx_params(&TxParams::new().set_ramp_time(RampTime::Micros40).set_power(0x0A))?;
-
-        self.radio.set_packet_type(PacketType::LoRa)?;
-        self.radio.set_lora_sync_word(LoRaSyncWord::Public)?;
-        trace!("Done initializing STM32WL SUBGHZ radio");
-        Ok(())
     }
 
     /// Perform a transmission with the given parameters and payload. Returns any time adjustements needed form
     /// the upcoming RX window start.
     async fn do_tx(&mut self, config: TxConfig, buf: &[u8]) -> Result<u32, RadioError> {
-        //trace!("TX Request: {}", config);
+        trace!("TX request: {}", config);
-        trace!("TX START");
+        self.switch.set_tx();
-        self.switch.set_tx_lp();
-        self.configure()?;
 
         self.radio
             .set_rf_frequency(&RfFreq::from_frequency(config.rf.frequency))?;
@@ -139,34 +88,26 @@ impl<'d> StateInner<'d> {
 
         self.radio.set_lora_packet_params(&packet_params)?;
 
-        let irq_cfg = CfgIrq::new()
+        let irq_cfg = CfgIrq::new().irq_enable_all(Irq::TxDone).irq_enable_all(Irq::Timeout);
-            .irq_enable_all(Irq::TxDone)
-            .irq_enable_all(Irq::RxDone)
-            .irq_enable_all(Irq::Timeout);
         self.radio.set_irq_cfg(&irq_cfg)?;
 
         self.radio.set_buffer_base_address(0, 0)?;
         self.radio.write_buffer(0, buf)?;
 
-        self.radio.set_tx(Timeout::DISABLED)?;
+        // The maximum airtime for any LoRaWAN package is 2793.5ms.
+        // The value of 4000ms is copied from C driver and gives us a good safety margin.
+        self.radio.set_tx(Timeout::from_millis_sat(4000))?;
+        trace!("TX started");
 
         loop {
-            let (_status, irq_status) = IRQ.wait().await;
+            let (_status, irq_status) = self.irq_wait().await;
-            IRQ.reset();
 
             if irq_status & Irq::TxDone.mask() != 0 {
-                let stats = self.radio.lora_stats()?;
+                trace!("TX done");
-                let (status, error_mask) = self.radio.op_error()?;
-                trace!(
-                    "TX done. Stats: {:?}. OP error: {:?}, mask {:?}",
-                    stats,
-                    status,
-                    error_mask
-                );
-
                 return Ok(0);
-            } else if irq_status & Irq::Timeout.mask() != 0 {
+            }
-                trace!("TX timeout");
+
+            if irq_status & Irq::Timeout.mask() != 0 {
                 return Err(RadioError);
             }
         }
@@ -174,10 +115,15 @@ impl<'d> StateInner<'d> {
 
     fn set_lora_mod_params(&mut self, config: RfConfig) -> Result<(), Error> {
         let mod_params = LoRaModParams::new()
-            .set_sf(convert_spreading_factor(config.spreading_factor))
+            .set_sf(convert_spreading_factor(&config.spreading_factor))
-            .set_bw(convert_bandwidth(config.bandwidth))
+            .set_bw(convert_bandwidth(&config.bandwidth))
             .set_cr(CodingRate::Cr45)
-            .set_ldro_en(true);
+            .set_ldro_en(matches!(
+                (config.spreading_factor, config.bandwidth),
+                (SpreadingFactor::_12, Bandwidth::_125KHz)
+                    | (SpreadingFactor::_12, Bandwidth::_250KHz)
+                    | (SpreadingFactor::_11, Bandwidth::_125KHz)
+            ));
         self.radio.set_lora_mod_params(&mod_params)
     }
 
@@ -185,10 +131,8 @@ impl<'d> StateInner<'d> {
     /// be able to hold a single LoRaWAN packet.
     async fn do_rx(&mut self, config: RfConfig, buf: &mut [u8]) -> Result<(usize, RxQuality), RadioError> {
         assert!(buf.len() >= 255);
-        trace!("RX START");
+        trace!("RX request: {}", config);
-        // trace!("Starting RX: {}", config);
         self.switch.set_rx();
-        self.configure()?;
 
         self.radio.set_rf_frequency(&RfFreq::from_frequency(config.frequency))?;
 
@@ -198,77 +142,110 @@ impl<'d> StateInner<'d> {
             .set_preamble_len(8)
             .set_header_type(HeaderType::Variable)
             .set_payload_len(0xFF)
-            .set_crc_en(true)
+            .set_crc_en(false)
             .set_invert_iq(true);
         self.radio.set_lora_packet_params(&packet_params)?;
 
         let irq_cfg = CfgIrq::new()
             .irq_enable_all(Irq::RxDone)
             .irq_enable_all(Irq::PreambleDetected)
+            .irq_enable_all(Irq::HeaderValid)
             .irq_enable_all(Irq::HeaderErr)
-            .irq_enable_all(Irq::Timeout)
+            .irq_enable_all(Irq::Err)
-            .irq_enable_all(Irq::Err);
+            .irq_enable_all(Irq::Timeout);
         self.radio.set_irq_cfg(&irq_cfg)?;
 
+        self.radio.set_buffer_base_address(0, 0)?;
+
+        // NOTE: Upper layer handles timeout by cancelling the future
         self.radio.set_rx(Timeout::DISABLED)?;
+
         trace!("RX started");
 
         loop {
-            let (status, irq_status) = IRQ.wait().await;
+            let (_status, irq_status) = self.irq_wait().await;
-            IRQ.reset();
-            trace!("RX IRQ {:?}, {:?}", status, irq_status);
-            if irq_status & Irq::RxDone.mask() != 0 {
-                let (status, len, ptr) = self.radio.rx_buffer_status()?;
 
+            if irq_status & Irq::RxDone.mask() != 0 {
+                let (_status, len, ptr) = self.radio.rx_buffer_status()?;
                 let packet_status = self.radio.lora_packet_status()?;
                 let rssi = packet_status.rssi_pkt().to_integer();
                 let snr = packet_status.snr_pkt().to_integer();
-                trace!(
-                    "RX done. Received {} bytes. RX status: {:?}. Pkt status: {:?}",
-                    len,
-                    status.cmd(),
-                    packet_status,
-                );
                 self.radio.read_buffer(ptr, &mut buf[..len as usize])?;
                 self.radio.set_standby(StandbyClk::Rc)?;
+
+                trace!("RX done: {=[u8]:#02X}", &mut buf[..len as usize]);
                 return Ok((len as usize, RxQuality::new(rssi, snr as i8)));
-            } else if irq_status & (Irq::Timeout.mask() | Irq::TxDone.mask()) != 0 {
+            }
+
+            if irq_status & Irq::Timeout.mask() != 0 {
                 return Err(RadioError);
             }
         }
     }
 
-    /// Read interrupt status and store in global signal
+    async fn irq_wait(&mut self) -> (Status, u16) {
-    fn on_interrupt(&mut self) {
+        poll_fn(|cx| {
-        let (status, irq_status) = self.radio.irq_status().expect("error getting irq status");
+            self.irq.unpend();
-        self.radio
+            self.irq.enable();
-            .clear_irq_status(irq_status)
+            IRQ_WAKER.register(cx.waker());
-            .expect("error clearing irq status");
+
-        if irq_status & Irq::PreambleDetected.mask() != 0 {
+            let (status, irq_status) = self.radio.irq_status().expect("error getting irq status");
-            trace!("Preamble detected, ignoring");
+            self.radio
-        } else {
+                .clear_irq_status(irq_status)
-            IRQ.signal((status, irq_status));
+                .expect("error clearing irq status");
-        }
+
+            trace!("SUGHZ IRQ 0b{=u16:b}, {:?}", irq_status, status);
+
+            if irq_status == 0 {
+                Poll::Pending
+            } else {
+                Poll::Ready((status, irq_status))
+            }
+        })
+        .await
     }
 }
 
-impl PhyRxTx for SubGhzRadio<'static> {
+fn configure_radio(radio: &mut SubGhz<'_, NoDma, NoDma>, config: SubGhzRadioConfig) -> Result<(), RadioError> {
+    trace!("Configuring STM32WL SUBGHZ radio");
+
+    radio.set_regulator_mode(config.reg_mode)?;
+    radio.set_standby(StandbyClk::Rc)?;
+
+    let tcxo_mode = TcxoMode::new()
+        .set_txco_trim(TcxoTrim::Volts1pt7)
+        .set_timeout(Timeout::from_duration_sat(core::time::Duration::from_millis(100)));
+    radio.set_tcxo_mode(&tcxo_mode)?;
+    // Reduce input capacitance as shown in Reference Manual "Figure 23. HSE32 TCXO control".
+    // The STM32CUBE C driver also does this.
+    radio.set_hse_in_trim(HseTrim::MIN)?;
+
+    // Re-calibrate everything after setting the TXCO config.
+    radio.calibrate(0x7F)?;
+    radio.calibrate_image(config.calibrate_image)?;
+
+    radio.set_pa_config(&config.pa_config)?;
+    radio.set_tx_params(&config.tx_params)?;
+    radio.set_pa_ocp(Ocp::Max140m)?;
+
+    radio.set_packet_type(PacketType::LoRa)?;
+    radio.set_lora_sync_word(LoRaSyncWord::Public)?;
+
+    trace!("Done initializing STM32WL SUBGHZ radio");
+    Ok(())
+}
+
+impl<RS: RadioSwitch> PhyRxTx for SubGhzRadio<'static, RS> {
     type PhyError = RadioError;
 
-    type TxFuture<'m> = impl Future<Output = Result<u32, Self::PhyError>> + 'm;
+    type TxFuture<'m> = impl Future<Output = Result<u32, Self::PhyError>> + 'm where RS: 'm;
     fn tx<'m>(&'m mut self, config: TxConfig, buf: &'m [u8]) -> Self::TxFuture<'m> {
-        async move {
+        async move { self.do_tx(config, buf).await }
-            let inner = unsafe { &mut *self.state };
-            inner.do_tx(config, buf).await
-        }
     }
 
-    type RxFuture<'m> = impl Future<Output = Result<(usize, RxQuality), Self::PhyError>> + 'm;
+    type RxFuture<'m> = impl Future<Output = Result<(usize, RxQuality), Self::PhyError>> + 'm  where RS: 'm;
     fn rx<'m>(&'m mut self, config: RfConfig, buf: &'m mut [u8]) -> Self::RxFuture<'m> {
-        async move {
+        async move { self.do_rx(config, buf).await }
-            let inner = unsafe { &mut *self.state };
-            inner.do_rx(config, buf).await
-        }
     }
 }
 
@@ -278,48 +255,21 @@ impl From<embassy_stm32::spi::Error> for RadioError {
     }
 }
 
-impl<'d> Timings for SubGhzRadio<'d> {
+impl<'d, RS> Timings for SubGhzRadio<'d, RS> {
     fn get_rx_window_offset_ms(&self) -> i32 {
-        -200
+        -500
     }
     fn get_rx_window_duration_ms(&self) -> u32 {
-        800
+        3000
     }
 }
 
-/// Represents the radio switch found on STM32WL based boards, used to control the radio for transmission or reception.
+pub trait RadioSwitch {
-pub struct RadioSwitch<'d> {
+    fn set_rx(&mut self);
-    ctrl1: Output<'d, AnyPin>,
+    fn set_tx(&mut self);
-    ctrl2: Output<'d, AnyPin>,
-    ctrl3: Output<'d, AnyPin>,
 }
 
-impl<'d> RadioSwitch<'d> {
+fn convert_spreading_factor(sf: &SpreadingFactor) -> SF {
-    pub fn new(ctrl1: Output<'d, AnyPin>, ctrl2: Output<'d, AnyPin>, ctrl3: Output<'d, AnyPin>) -> Self {
-        Self { ctrl1, ctrl2, ctrl3 }
-    }
-
-    pub(crate) fn set_rx(&mut self) {
-        self.ctrl1.set_high();
-        self.ctrl2.set_low();
-        self.ctrl3.set_high();
-    }
-
-    pub(crate) fn set_tx_lp(&mut self) {
-        self.ctrl1.set_high();
-        self.ctrl2.set_high();
-        self.ctrl3.set_high();
-    }
-
-    #[allow(dead_code)]
-    pub(crate) fn set_tx_hp(&mut self) {
-        self.ctrl2.set_high();
-        self.ctrl1.set_low();
-        self.ctrl3.set_high();
-    }
-}
-
-fn convert_spreading_factor(sf: SpreadingFactor) -> SF {
     match sf {
         SpreadingFactor::_7 => SF::Sf7,
         SpreadingFactor::_8 => SF::Sf8,
@@ -330,7 +280,7 @@ fn convert_spreading_factor(sf: SpreadingFactor) -> SF {
     }
 }
 
-fn convert_bandwidth(bw: Bandwidth) -> LoRaBandwidth {
+fn convert_bandwidth(bw: &Bandwidth) -> LoRaBandwidth {
     match bw {
         Bandwidth::_125KHz => LoRaBandwidth::Bw125,
         Bandwidth::_250KHz => LoRaBandwidth::Bw250,

embassy-stm32/src/rcc/wl.rs

@@ -202,54 +202,11 @@ impl Default for Config {
 
 pub(crate) unsafe fn init(config: Config) {
     let (sys_clk, sw, vos) = match config.mux {
-        ClockSrc::HSI16 => {
+        ClockSrc::HSI16 => (HSI_FREQ.0, 0x01, VoltageScale::Range2),
-            // Enable HSI16
+        ClockSrc::HSE32 => (HSE32_FREQ.0, 0x02, VoltageScale::Range1),
-            RCC.cr().write(|w| w.set_hsion(true));
+        ClockSrc::MSI(range) => (range.freq(), 0x00, range.vos()),
-            while !RCC.cr().read().hsirdy() {}
-
-            (HSI_FREQ.0, 0x01, VoltageScale::Range2)
-        }
-        ClockSrc::HSE32 => {
-            // Enable HSE32
-            RCC.cr().write(|w| {
-                w.set_hsebyppwr(true);
-                w.set_hseon(true);
-            });
-            while !RCC.cr().read().hserdy() {}
-
-            (HSE32_FREQ.0, 0x02, VoltageScale::Range1)
-        }
-        ClockSrc::MSI(range) => {
-            RCC.cr().write(|w| {
-                w.set_msirange(range.into());
-                w.set_msion(true);
-            });
-
-            while !RCC.cr().read().msirdy() {}
-
-            (range.freq(), 0x00, range.vos())
-        }
     };
 
-    RCC.cfgr().modify(|w| {
-        w.set_sw(sw.into());
-        if config.ahb_pre == AHBPrescaler::NotDivided {
-            w.set_hpre(0);
-        } else {
-            w.set_hpre(config.ahb_pre.into());
-        }
-        w.set_ppre1(config.apb1_pre.into());
-        w.set_ppre2(config.apb2_pre.into());
-    });
-
-    RCC.extcfgr().modify(|w| {
-        if config.shd_ahb_pre == AHBPrescaler::NotDivided {
-            w.set_shdhpre(0);
-        } else {
-            w.set_shdhpre(config.shd_ahb_pre.into());
-        }
-    });
-
     let ahb_freq: u32 = match config.ahb_pre {
         AHBPrescaler::NotDivided => sys_clk,
         pre => {
@@ -288,16 +245,6 @@ pub(crate) unsafe fn init(config: Config) {
         }
     };
 
-    let apb3_freq = shd_ahb_freq;
-
-    if config.enable_lsi {
-        let csr = RCC.csr().read();
-        if !csr.lsion() {
-            RCC.csr().modify(|w| w.set_lsion(true));
-            while !RCC.csr().read().lsirdy() {}
-        }
-    }
-
     // Adjust flash latency
     let flash_clk_src_freq: u32 = shd_ahb_freq;
     let ws = match vos {
@@ -319,6 +266,61 @@ pub(crate) unsafe fn init(config: Config) {
 
     while FLASH.acr().read().latency() != ws {}
 
+    match config.mux {
+        ClockSrc::HSI16 => {
+            // Enable HSI16
+            RCC.cr().write(|w| w.set_hsion(true));
+            while !RCC.cr().read().hsirdy() {}
+        }
+        ClockSrc::HSE32 => {
+            // Enable HSE32
+            RCC.cr().write(|w| {
+                w.set_hsebyppwr(true);
+                w.set_hseon(true);
+            });
+            while !RCC.cr().read().hserdy() {}
+        }
+        ClockSrc::MSI(range) => {
+            let cr = RCC.cr().read();
+            assert!(!cr.msion() || cr.msirdy());
+            RCC.cr().write(|w| {
+                w.set_msirgsel(true);
+                w.set_msirange(range.into());
+                w.set_msion(true);
+            });
+            while !RCC.cr().read().msirdy() {}
+        }
+    }
+
+    RCC.extcfgr().modify(|w| {
+        if config.shd_ahb_pre == AHBPrescaler::NotDivided {
+            w.set_shdhpre(0);
+        } else {
+            w.set_shdhpre(config.shd_ahb_pre.into());
+        }
+    });
+
+    RCC.cfgr().modify(|w| {
+        w.set_sw(sw.into());
+        if config.ahb_pre == AHBPrescaler::NotDivided {
+            w.set_hpre(0);
+        } else {
+            w.set_hpre(config.ahb_pre.into());
+        }
+        w.set_ppre1(config.apb1_pre.into());
+        w.set_ppre2(config.apb2_pre.into());
+    });
+
+    // TODO: switch voltage range
+
+    if config.enable_lsi {
+        let csr = RCC.csr().read();
+        if !csr.lsion() {
+            RCC.csr().modify(|w| w.set_lsion(true));
+            while !RCC.csr().read().lsirdy() {}
+        }
+    }
+
     set_freqs(Clocks {
         sys: Hertz(sys_clk),
         ahb1: Hertz(ahb_freq),
@@ -326,7 +328,7 @@ pub(crate) unsafe fn init(config: Config) {
         ahb3: Hertz(shd_ahb_freq),
         apb1: Hertz(apb1_freq),
         apb2: Hertz(apb2_freq),
-        apb3: Hertz(apb3_freq),
+        apb3: Hertz(shd_ahb_freq),
         apb1_tim: Hertz(apb1_tim_freq),
         apb2_tim: Hertz(apb2_tim_freq),
     });

embassy-stm32/src/spi/mod.rs

@@ -179,6 +179,19 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
         )
     }
 
+    /// Useful for on chip peripherals like SUBGHZ which are hardwired.
+    /// The bus can optionally be exposed externally with `Spi::new()` still.
+    #[allow(dead_code)]
+    pub(crate) fn new_internal(
+        peri: impl Peripheral<P = T> + 'd,
+        txdma: impl Peripheral<P = Tx> + 'd,
+        rxdma: impl Peripheral<P = Rx> + 'd,
+        freq: Hertz,
+        config: Config,
+    ) -> Self {
+        Self::new_inner(peri, None, None, None, txdma, rxdma, freq, config)
+    }
+
     fn new_inner(
         peri: impl Peripheral<P = T> + 'd,
         sck: Option<PeripheralRef<'d, AnyPin>>,

embassy-stm32/src/subghz/mod.rs

@@ -81,7 +81,7 @@ pub use value_error::ValueError;
 use crate::dma::NoDma;
 use crate::peripherals::SUBGHZSPI;
 use crate::rcc::sealed::RccPeripheral;
-use crate::spi::{BitOrder, Config as SpiConfig, MisoPin, MosiPin, SckPin, Spi, MODE_0};
+use crate::spi::{BitOrder, Config as SpiConfig, Spi, MODE_0};
 use crate::time::Hertz;
 use crate::{pac, Peripheral};
 
@@ -212,9 +212,6 @@ impl<'d, Tx, Rx> SubGhz<'d, Tx, Rx> {
     /// clock.
     pub fn new(
         peri: impl Peripheral<P = SUBGHZSPI> + 'd,
-        sck: impl Peripheral<P = impl SckPin<SUBGHZSPI>> + 'd,
-        mosi: impl Peripheral<P = impl MosiPin<SUBGHZSPI>> + 'd,
-        miso: impl Peripheral<P = impl MisoPin<SUBGHZSPI>> + 'd,
         txdma: impl Peripheral<P = Tx> + 'd,
         rxdma: impl Peripheral<P = Rx> + 'd,
     ) -> Self {
@@ -227,7 +224,7 @@ impl<'d, Tx, Rx> SubGhz<'d, Tx, Rx> {
         let mut config = SpiConfig::default();
         config.mode = MODE_0;
         config.bit_order = BitOrder::MsbFirst;
-        let spi = Spi::new(peri, sck, mosi, miso, txdma, rxdma, clk, config);
+        let spi = Spi::new_internal(peri, txdma, rxdma, clk, config);
 
         unsafe { wakeup() };
 

examples/stm32l0/Cargo.toml

@@ -14,7 +14,7 @@ embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["de
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32l072cz", "time-driver-any", "exti", "unstable-traits", "memory-x"]  }
 embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["sx127x", "time", "defmt"], optional = true}
 
-lorawan-device = { version = "0.7.1", default-features = false, features = ["async"], optional = true }
+lorawan-device = { version = "0.8.0", default-features = false, features = ["async"], optional = true }
 lorawan = { version = "0.7.1", default-features = false, features = ["default-crypto"], optional = true }
 
 defmt = "0.3"

examples/stm32l0/src/bin/lorawan.rs

@@ -47,7 +47,7 @@ async fn main(_spawner: Spawner) {
     let radio = Sx127xRadio::new(spi, cs, reset, ready_pin, DummySwitch).await.unwrap();
 
     let region = region::EU868::default().into();
-    let mut device: Device<_, Crypto, _, _> = Device::new(region, radio, LoraTimer, Rng::new(p.RNG));
+    let mut device: Device<_, Crypto, _, _> = Device::new(region, radio, LoraTimer::new(), Rng::new(p.RNG));
 
     defmt::info!("Joining LoRaWAN network");
 

examples/stm32wl/Cargo.toml

@@ -10,7 +10,7 @@ embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["de
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32wl55jc-cm4", "time-driver-any", "memory-x", "subghz", "unstable-pac", "exti"]  }
 embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["stm32wl", "time", "defmt"] }
 
-lorawan-device = { version = "0.7.1", default-features = false, features = ["async"] }
+lorawan-device = { version = "0.8.0", default-features = false, features = ["async"] }
 lorawan = { version = "0.7.1", default-features = false, features = ["default-crypto"] }
 
 defmt = "0.3"

examples/stm32wl/src/bin/lorawan.rs

@@ -9,7 +9,7 @@ use embassy_executor::Spawner;
 use embassy_lora::stm32wl::*;
 use embassy_lora::LoraTimer;
 use embassy_stm32::dma::NoDma;
-use embassy_stm32::gpio::{Level, Output, Pin, Speed};
+use embassy_stm32::gpio::{AnyPin, Level, Output, Pin, Speed};
 use embassy_stm32::rng::Rng;
 use embassy_stm32::subghz::*;
 use embassy_stm32::{interrupt, pac};
@@ -17,6 +17,32 @@ use lorawan::default_crypto::DefaultFactory as Crypto;
 use lorawan_device::async_device::{region, Device, JoinMode};
 use {defmt_rtt as _, panic_probe as _};
 
+struct RadioSwitch<'a> {
+    ctrl1: Output<'a, AnyPin>,
+    ctrl2: Output<'a, AnyPin>,
+    ctrl3: Output<'a, AnyPin>,
+}
+
+impl<'a> RadioSwitch<'a> {
+    fn new(ctrl1: Output<'a, AnyPin>, ctrl2: Output<'a, AnyPin>, ctrl3: Output<'a, AnyPin>) -> Self {
+        Self { ctrl1, ctrl2, ctrl3 }
+    }
+}
+
+impl<'a> embassy_lora::stm32wl::RadioSwitch for RadioSwitch<'a> {
+    fn set_rx(&mut self) {
+        self.ctrl1.set_high();
+        self.ctrl2.set_low();
+        self.ctrl3.set_high();
+    }
+
+    fn set_tx(&mut self) {
+        self.ctrl1.set_high();
+        self.ctrl2.set_high();
+        self.ctrl3.set_high();
+    }
+}
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
@@ -31,18 +57,19 @@ async fn main(_spawner: Spawner) {
     let ctrl3 = Output::new(p.PC5.degrade(), Level::High, Speed::High);
     let rfs = RadioSwitch::new(ctrl1, ctrl2, ctrl3);
 
-    let radio = SubGhz::new(p.SUBGHZSPI, p.PA5, p.PA7, p.PA6, NoDma, NoDma);
+    let radio = SubGhz::new(p.SUBGHZSPI, NoDma, NoDma);
-
     let irq = interrupt::take!(SUBGHZ_RADIO);
-    static mut RADIO_STATE: SubGhzState<'static> = SubGhzState::new();
+
-    let radio = unsafe { SubGhzRadio::new(&mut RADIO_STATE, radio, rfs, irq) };
+    let mut radio_config = SubGhzRadioConfig::default();
+    radio_config.calibrate_image = CalibrateImage::ISM_863_870;
+    let radio = SubGhzRadio::new(radio, rfs, irq, radio_config).unwrap();
 
     let mut region: region::Configuration = region::EU868::default().into();
 
     // NOTE: This is specific for TTN, as they have a special RX1 delay
     region.set_receive_delay1(5000);
 
-    let mut device: Device<_, Crypto, _, _> = Device::new(region, radio, LoraTimer, Rng::new(p.RNG));
+    let mut device: Device<_, Crypto, _, _> = Device::new(region, radio, LoraTimer::new(), Rng::new(p.RNG));
 
     // Depending on network, this might be part of JOIN
     device.set_datarate(region::DR::_0); // SF12

examples/stm32wl/src/bin/subghz.rs

@@ -72,7 +72,7 @@ async fn main(_spawner: Spawner) {
         unsafe { interrupt::SUBGHZ_RADIO::steal() }.disable();
     });
 
-    let mut radio = SubGhz::new(p.SUBGHZSPI, p.PA5, p.PA7, p.PA6, NoDma, NoDma);
+    let mut radio = SubGhz::new(p.SUBGHZSPI, NoDma, NoDma);
 
     defmt::info!("Radio ready for use");