From 340eb4eeadd1c7a022143d92bf6e3bb7ce141131 Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Sat, 12 Feb 2022 02:26:15 +0100
Subject: [PATCH] stm32: add rust stable support

---
 ci.sh                                 | 33 ++++------------
 ci_stable.sh                          | 32 ++++++++++++++++
 embassy-stm32/Cargo.toml              | 10 +++--
 embassy-stm32/src/exti.rs             |  6 ++-
 embassy-stm32/src/i2c/v2.rs           |  8 +++-
 embassy-stm32/src/lib.rs              |  6 ++-
 embassy-stm32/src/spi/mod.rs          |  7 +++-
 embassy-stm32/src/usart/mod.rs        |  7 +++-
 examples/stm32f0/Cargo.toml           |  2 +-
 examples/stm32f1/Cargo.toml           |  2 +-
 examples/stm32f3/Cargo.toml           |  2 +-
 examples/stm32f4/Cargo.toml           |  2 +-
 examples/stm32f7/Cargo.toml           |  2 +-
 examples/stm32g0/Cargo.toml           |  2 +-
 examples/stm32g4/Cargo.toml           |  2 +-
 examples/stm32h7/Cargo.toml           |  2 +-
 examples/stm32l0/Cargo.toml           | 10 +++--
 examples/stm32l0/src/bin/raw_spawn.rs | 54 +++++++++++++++++++++++++++
 examples/stm32l1/Cargo.toml           |  2 +-
 examples/stm32l4/Cargo.toml           |  2 +-
 examples/stm32u5/Cargo.toml           |  2 +-
 examples/stm32wb55/Cargo.toml         |  2 +-
 examples/stm32wl55/Cargo.toml         |  2 +-
 tests/stm32/Cargo.toml                |  2 +-
 24 files changed, 149 insertions(+), 52 deletions(-)
 create mode 100644 examples/stm32l0/src/bin/raw_spawn.rs

diff --git a/ci.sh b/ci.sh
index cd0db286e..8cfba8f5b 100755
--- a/ci.sh
+++ b/ci.sh
@@ -42,32 +42,13 @@ cargo batch  \
     --- build --release --manifest-path embassy-nrf/Cargo.toml --target thumbv7em-none-eabi --features nightly,nrf52840,gpiote,time-driver-rtc1 \
     --- build --release --manifest-path embassy-nrf/Cargo.toml --target thumbv7em-none-eabi --features nightly,nrf52840,log,gpiote,time-driver-rtc1 \
     --- build --release --manifest-path embassy-nrf/Cargo.toml --target thumbv7em-none-eabi --features nightly,nrf52840,defmt,gpiote,time-driver-rtc1,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f411ce,defmt,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f411ce,defmt,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f410tb,defmt,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f410tb,defmt,exti,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f411ce,defmt,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f411ce,defmt,exti,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,exti,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,exti,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,exti,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,exti,time-driver-any,unstable-traits \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,exti,time-driver-any \
-    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features nightly,stm32f410tb,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features nightly,stm32f411ce,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features nightly,stm32f429zi,log,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features nightly,stm32h755zi-cm7,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features nightly,stm32l476vg,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features nightly,stm32l072cz,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features nightly,stm32l151cb-a,defmt,exti,time-driver-any,unstable-traits \
     --- build --release --manifest-path docs/modules/ROOT/examples/basic/Cargo.toml --target thumbv7em-none-eabi \
     --- build --release --manifest-path examples/std/Cargo.toml --target x86_64-unknown-linux-gnu --out-dir out/examples/std \
     --- build --release --manifest-path examples/nrf/Cargo.toml --target thumbv7em-none-eabi --out-dir out/examples/nrf \
diff --git a/ci_stable.sh b/ci_stable.sh
index c4ec30824..a1c6bd26e 100755
--- a/ci_stable.sh
+++ b/ci_stable.sh
@@ -27,4 +27,36 @@ cargo batch  \
     --- build --release --manifest-path embassy-nrf/Cargo.toml --target thumbv7em-none-eabi --features nrf52840,gpiote,time-driver-rtc1 \
     --- build --release --manifest-path embassy-nrf/Cargo.toml --target thumbv7em-none-eabi --features nrf52840,log,gpiote,time-driver-rtc1 \
     --- build --release --manifest-path embassy-nrf/Cargo.toml --target thumbv7em-none-eabi --features nrf52840,defmt,gpiote,time-driver-rtc1,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32g473cc,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32g491re,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32u585zi,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32wb55vy,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32wl55uc-cm4,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l4r9zi,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f303vc,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f411ce,defmt,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f411ce,defmt,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f410tb,defmt,exti,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f410tb,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,exti,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32f429zi,log,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,exti,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32h755zi-cm7,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,exti,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features stm32l476vg,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,exti,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32l072cz,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,exti,time-driver-any \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features stm32l151cb-a,defmt,exti,time-driver-any,unstable-traits \
     --- build --release --manifest-path examples/nrf/Cargo.toml --target thumbv7em-none-eabi --no-default-features --out-dir out/examples/nrf --bin raw_spawn \
+    --- build --release --manifest-path examples/stm32l0/Cargo.toml --target thumbv6m-none-eabi --no-default-features --out-dir out/examples/stm32l0 --bin raw_spawn \
diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index 55a646d4a..cb35e7071 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 resolver = "2"
 
 [dependencies]
-embassy = { version = "0.1.0", path = "../embassy", features = ["nightly"]}
+embassy = { version = "0.1.0", path = "../embassy" }
 embassy-macros = { version = "0.1.0", path = "../embassy-macros", features = ["stm32"] }
 embassy-hal-common = {version = "0.1.0", path = "../embassy-hal-common" }
 embassy-net = { version = "0.1.0", path = "../embassy-net", default-features = false, optional = true }
@@ -57,14 +57,18 @@ time-driver-tim3 = ["_time-driver"]
 time-driver-tim4 = ["_time-driver"]
 time-driver-tim5 = ["_time-driver"]
 
+# Enable nightly-only features
+nightly = ["embassy/nightly", "embedded-hal-1", "embedded-hal-async"]
+
 # Reexport stm32-metapac at `embassy_stm32::pac`.
 # This is unstable because semver-minor (non-breaking) releases of embassy-stm32 may major-bump (breaking) the stm32-metapac version.
 # If this is an issue for you, you're encouraged to directly depend on a fixed version of the PAC.
 # There are no plans to make this stable.
 unstable-pac = []
 
-# Implement embedded-hal 1.0 alpha and embedded-hal-async traits.
-unstable-traits = ["embedded-hal-1", "embedded-hal-async"]
+# Implement embedded-hal 1.0 alpha traits.
+# Implement embedded-hal-async traits if `nightly` is set as well.
+unstable-traits = ["embedded-hal-1"]
 
 # BEGIN GENERATED FEATURES
 # Generated by stm32-gen-features. DO NOT EDIT.
diff --git a/embassy-stm32/src/exti.rs b/embassy-stm32/src/exti.rs
index 7d974c2dc..07d086843 100644
--- a/embassy-stm32/src/exti.rs
+++ b/embassy-stm32/src/exti.rs
@@ -150,7 +150,6 @@ mod eh02 {
 mod eh1 {
     use super::*;
     use core::convert::Infallible;
-    use futures::FutureExt;
 
     impl<'d, T: GpioPin> embedded_hal_1::digital::ErrorType for ExtiInput<'d, T> {
         type Error = Infallible;
@@ -165,6 +164,11 @@ mod eh1 {
             Ok(self.is_low())
         }
     }
+}
+#[cfg(all(feature = "unstable-traits", feature = "nightly"))]
+mod eh1a {
+    use super::*;
+    use futures::FutureExt;
 
     impl<'d, T: GpioPin> embedded_hal_async::digital::Wait for ExtiInput<'d, T> {
         type WaitForHighFuture<'a>
diff --git a/embassy-stm32/src/i2c/v2.rs b/embassy-stm32/src/i2c/v2.rs
index 9c05187a5..58ab771b7 100644
--- a/embassy-stm32/src/i2c/v2.rs
+++ b/embassy-stm32/src/i2c/v2.rs
@@ -912,7 +912,6 @@ impl Timings {
 mod eh1 {
     use super::super::{RxDma, TxDma};
     use super::*;
-    use core::future::Future;
 
     impl embedded_hal_1::i2c::Error for Error {
         fn kind(&self) -> embedded_hal_1::i2c::ErrorKind {
@@ -935,6 +934,13 @@ mod eh1 {
     {
         type Error = Error;
     }
+}
+
+#[cfg(all(feature = "unstable-traits", feature = "nightly"))]
+mod eh1a {
+    use super::super::{RxDma, TxDma};
+    use super::*;
+    use core::future::Future;
 
     impl<'d, T: Instance, TXDMA: TxDma<T>, RXDMA: RxDma<T>> embedded_hal_async::i2c::I2c
         for I2c<'d, T, TXDMA, RXDMA>
diff --git a/embassy-stm32/src/lib.rs b/embassy-stm32/src/lib.rs
index b985b3e4f..9c94e5f3f 100644
--- a/embassy-stm32/src/lib.rs
+++ b/embassy-stm32/src/lib.rs
@@ -1,6 +1,8 @@
 #![no_std]
-#![feature(generic_associated_types)]
-#![feature(type_alias_impl_trait)]
+#![cfg_attr(
+    feature = "nightly",
+    feature(generic_associated_types, type_alias_impl_trait)
+)]
 
 #[cfg(feature = "unstable-pac")]
 pub use stm32_metapac as pac;
diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index d92f21f82..04f95820f 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -664,7 +664,6 @@ mod eh02 {
 #[cfg(feature = "unstable-traits")]
 mod eh1 {
     use super::*;
-    use core::future::Future;
 
     impl<'d, T: Instance, Tx, Rx> embedded_hal_1::spi::ErrorType for Spi<'d, T, Tx, Rx> {
         type Error = Error;
@@ -680,6 +679,12 @@ mod eh1 {
             }
         }
     }
+}
+
+#[cfg(all(feature = "unstable-traits", feature = "nightly"))]
+mod eh1a {
+    use super::*;
+    use core::future::Future;
 
     impl<'d, T: Instance, Tx: TxDma<T>, Rx> embedded_hal_async::spi::Write<u8> for Spi<'d, T, Tx, Rx> {
         type WriteFuture<'a>
diff --git a/embassy-stm32/src/usart/mod.rs b/embassy-stm32/src/usart/mod.rs
index f17ae0add..718559813 100644
--- a/embassy-stm32/src/usart/mod.rs
+++ b/embassy-stm32/src/usart/mod.rs
@@ -256,7 +256,6 @@ mod eh02 {
 #[cfg(feature = "unstable-traits")]
 mod eh1 {
     use super::*;
-    use core::future::Future;
 
     impl embedded_hal_1::serial::Error for Error {
         fn kind(&self) -> embedded_hal_1::serial::ErrorKind {
@@ -274,6 +273,12 @@ mod eh1 {
     {
         type Error = Error;
     }
+}
+
+#[cfg(all(feature = "unstable-traits", feature = "nightly"))]
+mod eh1a {
+    use super::*;
+    use core::future::Future;
 
     impl<'d, T: Instance, TxDma, RxDma> embedded_hal_async::serial::Write for Uart<'d, T, TxDma, RxDma>
     where
diff --git a/examples/stm32f0/Cargo.toml b/examples/stm32f0/Cargo.toml
index ca06db031..0f76dabf0 100644
--- a/examples/stm32f0/Cargo.toml
+++ b/examples/stm32f0/Cargo.toml
@@ -14,5 +14,5 @@ defmt = "0.3"
 defmt-rtt = "0.3"
 panic-probe = "0.3"
 embassy = { path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { path = "../../embassy-stm32", features = ["defmt", "memory-x", "stm32f030f4", "time-driver-any"] }
+embassy-stm32 = { path = "../../embassy-stm32", features = ["nightly", "defmt", "memory-x", "stm32f030f4", "time-driver-any"] }
 
diff --git a/examples/stm32f1/Cargo.toml b/examples/stm32f1/Cargo.toml
index 677e40892..79be4b51c 100644
--- a/examples/stm32f1/Cargo.toml
+++ b/examples/stm32f1/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32f103c8", "unstable-pac", "memory-x", "time-driver-any"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f103c8", "unstable-pac", "memory-x", "time-driver-any"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32f3/Cargo.toml b/examples/stm32f3/Cargo.toml
index 8b6bc010c..3ce2bc8a2 100644
--- a/examples/stm32f3/Cargo.toml
+++ b/examples/stm32f3/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32f303vc", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f303vc", "unstable-pac", "memory-x", "time-driver-any", "exti"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32f4/Cargo.toml b/examples/stm32f4/Cargo.toml
index 798144c2b..8b6441655 100644
--- a/examples/stm32f4/Cargo.toml
+++ b/examples/stm32f4/Cargo.toml
@@ -8,7 +8,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "unstable-traits"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32f429zi", "unstable-pac", "memory-x", "time-driver-any", "exti", "usb-otg"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32f429zi", "unstable-pac", "memory-x", "time-driver-any", "exti", "usb-otg"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32f7/Cargo.toml b/examples/stm32f7/Cargo.toml
index 0b724fd85..3f6858340 100644
--- a/examples/stm32f7/Cargo.toml
+++ b/examples/stm32f7/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "net", "stm32f767zi", "unstable-pac", "time-driver-any", "exti"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "net", "stm32f767zi", "unstable-pac", "time-driver-any", "exti"]  }
 embassy-net = { path = "../../embassy-net", default-features = false, features = ["defmt", "tcp", "medium-ethernet", "pool-16"] }
 
 defmt = "0.3"
diff --git a/examples/stm32g0/Cargo.toml b/examples/stm32g0/Cargo.toml
index 5e33d79ca..a72ba5344 100644
--- a/examples/stm32g0/Cargo.toml
+++ b/examples/stm32g0/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "time-driver-any", "stm32g071rb", "memory-x", "unstable-pac", "exti"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32g071rb", "memory-x", "unstable-pac", "exti"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32g4/Cargo.toml b/examples/stm32g4/Cargo.toml
index f78066b7d..433a3673b 100644
--- a/examples/stm32g4/Cargo.toml
+++ b/examples/stm32g4/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "time-driver-any", "stm32g491re", "memory-x", "unstable-pac", "exti"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "time-driver-any", "stm32g491re", "memory-x", "unstable-pac", "exti"]  }
 embassy-hal-common = {version = "0.1.0", path = "../../embassy-hal-common" }
 
 defmt = "0.3"
diff --git a/examples/stm32h7/Cargo.toml b/examples/stm32h7/Cargo.toml
index 59d99bbcb..2929f539c 100644
--- a/examples/stm32h7/Cargo.toml
+++ b/examples/stm32h7/Cargo.toml
@@ -9,7 +9,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32h743bi", "net", "time-driver-any", "exti", "unstable-pac", "unstable-traits"] }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32h743bi", "net", "time-driver-any", "exti", "unstable-pac", "unstable-traits"] }
 embassy-net = { path = "../../embassy-net", default-features = false, features = ["defmt", "tcp", "medium-ethernet", "pool-16"] }
 embassy-hal-common = { path = "../../embassy-hal-common", default-features = false, features = ["defmt"] }
 
diff --git a/examples/stm32l0/Cargo.toml b/examples/stm32l0/Cargo.toml
index f5d1a1d41..ce4efa52c 100644
--- a/examples/stm32l0/Cargo.toml
+++ b/examples/stm32l0/Cargo.toml
@@ -5,14 +5,18 @@ name = "embassy-stm32l0-examples"
 version = "0.1.0"
 resolver = "2"
 
+[features]
+default = ["nightly"]
+nightly = ["embassy-stm32/nightly", "embassy-lora", "lorawan-device", "lorawan-encoding"]
+
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
 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"] }
+embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["sx127x", "time", "defmt"], optional = true}
 
-lorawan-device = { git = "https://github.com/ivajloip/rust-lorawan.git", rev = "0de1a2a31933f7c97887b5718c1755fa5ab93a42", default-features = false, features = ["async"] }
-lorawan-encoding = { git = "https://github.com/ivajloip/rust-lorawan.git", rev = "0de1a2a31933f7c97887b5718c1755fa5ab93a42", default-features = false, features = ["default-crypto"] }
+lorawan-device = { git = "https://github.com/ivajloip/rust-lorawan.git", rev = "0de1a2a31933f7c97887b5718c1755fa5ab93a42", default-features = false, features = ["async"], optional = true }
+lorawan-encoding = { git = "https://github.com/ivajloip/rust-lorawan.git", rev = "0de1a2a31933f7c97887b5718c1755fa5ab93a42", default-features = false, features = ["default-crypto"], optional = true }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32l0/src/bin/raw_spawn.rs b/examples/stm32l0/src/bin/raw_spawn.rs
new file mode 100644
index 000000000..9bb087c9e
--- /dev/null
+++ b/examples/stm32l0/src/bin/raw_spawn.rs
@@ -0,0 +1,54 @@
+#![no_std]
+#![no_main]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use example_common::*;
+
+use core::mem;
+use cortex_m_rt::entry;
+
+use embassy::executor::raw::TaskStorage;
+use embassy::executor::Executor;
+use embassy::time::{Duration, Timer};
+use embassy::util::Forever;
+
+async fn run1() {
+    loop {
+        info!("BIG INFREQUENT TICK");
+        Timer::after(Duration::from_ticks(64000)).await;
+    }
+}
+
+async fn run2() {
+    loop {
+        info!("tick");
+        Timer::after(Duration::from_ticks(13000)).await;
+    }
+}
+
+static EXECUTOR: Forever<Executor> = Forever::new();
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    let _p = embassy_stm32::init(Default::default());
+    let executor = EXECUTOR.put(Executor::new());
+
+    let run1_task = TaskStorage::new();
+    let run2_task = TaskStorage::new();
+
+    // Safety: these variables do live forever if main never returns.
+    let run1_task = unsafe { make_static(&run1_task) };
+    let run2_task = unsafe { make_static(&run2_task) };
+
+    executor.run(|spawner| {
+        unwrap!(spawner.spawn(run1_task.spawn(|| run1())));
+        unwrap!(spawner.spawn(run2_task.spawn(|| run2())));
+    });
+}
+
+unsafe fn make_static<T>(t: &T) -> &'static T {
+    mem::transmute(t)
+}
diff --git a/examples/stm32l1/Cargo.toml b/examples/stm32l1/Cargo.toml
index 86252d558..0cdf59162 100644
--- a/examples/stm32l1/Cargo.toml
+++ b/examples/stm32l1/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32l151cb-a", "time-driver-any", "memory-x"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32l151cb-a", "time-driver-any", "memory-x"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32l4/Cargo.toml b/examples/stm32l4/Cargo.toml
index 654d5f473..1d5a83fa1 100644
--- a/examples/stm32l4/Cargo.toml
+++ b/examples/stm32l4/Cargo.toml
@@ -10,7 +10,7 @@ resolver = "2"
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt" ] }
 embassy-traits = { version = "0.1.0", path = "../../embassy-traits" }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "unstable-pac", "stm32l4s5vi", "time-driver-any", "exti", "unstable-traits"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32l4s5vi", "time-driver-any", "exti", "unstable-traits"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32u5/Cargo.toml b/examples/stm32u5/Cargo.toml
index 85a2d8455..87e69c68a 100644
--- a/examples/stm32u5/Cargo.toml
+++ b/examples/stm32u5/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "unstable-pac", "stm32u585ai", "memory-x" ]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "stm32u585ai", "memory-x" ]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32wb55/Cargo.toml b/examples/stm32wb55/Cargo.toml
index e1c7689ef..bd066ef05 100644
--- a/examples/stm32wb55/Cargo.toml
+++ b/examples/stm32wb55/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32wb55cc", "time-driver-any", "exti"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32wb55cc", "time-driver-any", "exti"]  }
 
 defmt = "0.3"
 defmt-rtt = "0.3"
diff --git a/examples/stm32wl55/Cargo.toml b/examples/stm32wl55/Cargo.toml
index f2e97699b..4901ea693 100644
--- a/examples/stm32wl55/Cargo.toml
+++ b/examples/stm32wl55/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32wl55jc-cm4", "time-driver-any", "memory-x", "subghz", "unstable-pac", "exti"]  }
+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"] }
 
 lorawan-device = { git = "https://github.com/ivajloip/rust-lorawan.git", rev = "0de1a2a31933f7c97887b5718c1755fa5ab93a42", default-features = false, features = ["async"] }
diff --git a/tests/stm32/Cargo.toml b/tests/stm32/Cargo.toml
index 1741508cb..8d0901091 100644
--- a/tests/stm32/Cargo.toml
+++ b/tests/stm32/Cargo.toml
@@ -14,7 +14,7 @@ stm32wb55rg = ["embassy-stm32/stm32wb55rg"]
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "unstable-pac", "memory-x", "time-driver-tim2"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "unstable-pac", "memory-x", "time-driver-tim2"]  }
 
 defmt = "0.3.0"
 defmt-rtt = "0.3.0"