Support for STM32L1

* Add RCC
* Fix more issues with dash in chip names
* Update stm32-data version
* Add blinky and spi example

19 files changed, 558 insertions, 10 deletions

diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 79a5ad796..5cdf75d7b 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -78,6 +78,9 @@ jobs:
           - package: embassy-stm32
             target: thumbv6m-none-eabi
             features: stm32l072cz,defmt
+          - package: embassy-stm32
+            target: thumbv7m-none-eabi
+            features: stm32l151cb-a,defmt
           - package: examples/stm32f4
             target: thumbv7em-none-eabi
           - package: examples/stm32l4
@@ -86,6 +89,8 @@ jobs:
             target: thumbv7em-none-eabi
           - package: examples/stm32l0
             target: thumbv6m-none-eabi
+          - package: examples/stm32l1
+            target: thumbv7m-none-eabi
           - package: examples/stm32wb55
             target: thumbv7em-none-eabihf
           - package: examples/stm32wl55
diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index dec336588..3e91040f0 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -625,6 +625,93 @@ stm32l083rz = [ "stm32-metapac/stm32l083rz" ]
 stm32l083v8 = [ "stm32-metapac/stm32l083v8" ]
 stm32l083vb = [ "stm32-metapac/stm32l083vb" ]
 stm32l083vz = [ "stm32-metapac/stm32l083vz" ]
+stm32l100c6-a = [ "stm32-metapac/stm32l100c6-a" ]
+stm32l100c6 = [ "stm32-metapac/stm32l100c6" ]
+stm32l100r8-a = [ "stm32-metapac/stm32l100r8-a" ]
+stm32l100r8 = [ "stm32-metapac/stm32l100r8" ]
+stm32l100rb-a = [ "stm32-metapac/stm32l100rb-a" ]
+stm32l100rb = [ "stm32-metapac/stm32l100rb" ]
+stm32l100rc = [ "stm32-metapac/stm32l100rc" ]
+stm32l151c6-a = [ "stm32-metapac/stm32l151c6-a" ]
+stm32l151c6 = [ "stm32-metapac/stm32l151c6" ]
+stm32l151c8-a = [ "stm32-metapac/stm32l151c8-a" ]
+stm32l151c8 = [ "stm32-metapac/stm32l151c8" ]
+stm32l151cb-a = [ "stm32-metapac/stm32l151cb-a" ]
+stm32l151cb = [ "stm32-metapac/stm32l151cb" ]
+stm32l151cc = [ "stm32-metapac/stm32l151cc" ]
+stm32l151qc = [ "stm32-metapac/stm32l151qc" ]
+stm32l151qd = [ "stm32-metapac/stm32l151qd" ]
+stm32l151qe = [ "stm32-metapac/stm32l151qe" ]
+stm32l151r6-a = [ "stm32-metapac/stm32l151r6-a" ]
+stm32l151r6 = [ "stm32-metapac/stm32l151r6" ]
+stm32l151r8-a = [ "stm32-metapac/stm32l151r8-a" ]
+stm32l151r8 = [ "stm32-metapac/stm32l151r8" ]
+stm32l151rb-a = [ "stm32-metapac/stm32l151rb-a" ]
+stm32l151rb = [ "stm32-metapac/stm32l151rb" ]
+stm32l151rc-a = [ "stm32-metapac/stm32l151rc-a" ]
+stm32l151rc = [ "stm32-metapac/stm32l151rc" ]
+stm32l151rd = [ "stm32-metapac/stm32l151rd" ]
+stm32l151re = [ "stm32-metapac/stm32l151re" ]
+stm32l151uc = [ "stm32-metapac/stm32l151uc" ]
+stm32l151v8-a = [ "stm32-metapac/stm32l151v8-a" ]
+stm32l151v8 = [ "stm32-metapac/stm32l151v8" ]
+stm32l151vb-a = [ "stm32-metapac/stm32l151vb-a" ]
+stm32l151vb = [ "stm32-metapac/stm32l151vb" ]
+stm32l151vc-a = [ "stm32-metapac/stm32l151vc-a" ]
+stm32l151vc = [ "stm32-metapac/stm32l151vc" ]
+stm32l151vd-x = [ "stm32-metapac/stm32l151vd-x" ]
+stm32l151vd = [ "stm32-metapac/stm32l151vd" ]
+stm32l151ve = [ "stm32-metapac/stm32l151ve" ]
+stm32l151zc = [ "stm32-metapac/stm32l151zc" ]
+stm32l151zd = [ "stm32-metapac/stm32l151zd" ]
+stm32l151ze = [ "stm32-metapac/stm32l151ze" ]
+stm32l152c6-a = [ "stm32-metapac/stm32l152c6-a" ]
+stm32l152c6 = [ "stm32-metapac/stm32l152c6" ]
+stm32l152c8-a = [ "stm32-metapac/stm32l152c8-a" ]
+stm32l152c8 = [ "stm32-metapac/stm32l152c8" ]
+stm32l152cb-a = [ "stm32-metapac/stm32l152cb-a" ]
+stm32l152cb = [ "stm32-metapac/stm32l152cb" ]
+stm32l152cc = [ "stm32-metapac/stm32l152cc" ]
+stm32l152qc = [ "stm32-metapac/stm32l152qc" ]
+stm32l152qd = [ "stm32-metapac/stm32l152qd" ]
+stm32l152qe = [ "stm32-metapac/stm32l152qe" ]
+stm32l152r6-a = [ "stm32-metapac/stm32l152r6-a" ]
+stm32l152r6 = [ "stm32-metapac/stm32l152r6" ]
+stm32l152r8-a = [ "stm32-metapac/stm32l152r8-a" ]
+stm32l152r8 = [ "stm32-metapac/stm32l152r8" ]
+stm32l152rb-a = [ "stm32-metapac/stm32l152rb-a" ]
+stm32l152rb = [ "stm32-metapac/stm32l152rb" ]
+stm32l152rc-a = [ "stm32-metapac/stm32l152rc-a" ]
+stm32l152rc = [ "stm32-metapac/stm32l152rc" ]
+stm32l152rd = [ "stm32-metapac/stm32l152rd" ]
+stm32l152re = [ "stm32-metapac/stm32l152re" ]
+stm32l152uc = [ "stm32-metapac/stm32l152uc" ]
+stm32l152v8-a = [ "stm32-metapac/stm32l152v8-a" ]
+stm32l152v8 = [ "stm32-metapac/stm32l152v8" ]
+stm32l152vb-a = [ "stm32-metapac/stm32l152vb-a" ]
+stm32l152vb = [ "stm32-metapac/stm32l152vb" ]
+stm32l152vc-a = [ "stm32-metapac/stm32l152vc-a" ]
+stm32l152vc = [ "stm32-metapac/stm32l152vc" ]
+stm32l152vd-x = [ "stm32-metapac/stm32l152vd-x" ]
+stm32l152vd = [ "stm32-metapac/stm32l152vd" ]
+stm32l152ve = [ "stm32-metapac/stm32l152ve" ]
+stm32l152zc = [ "stm32-metapac/stm32l152zc" ]
+stm32l152zd = [ "stm32-metapac/stm32l152zd" ]
+stm32l152ze = [ "stm32-metapac/stm32l152ze" ]
+stm32l162qc = [ "stm32-metapac/stm32l162qc" ]
+stm32l162qd = [ "stm32-metapac/stm32l162qd" ]
+stm32l162rc-a = [ "stm32-metapac/stm32l162rc-a" ]
+stm32l162rc = [ "stm32-metapac/stm32l162rc" ]
+stm32l162rd = [ "stm32-metapac/stm32l162rd" ]
+stm32l162re = [ "stm32-metapac/stm32l162re" ]
+stm32l162vc-a = [ "stm32-metapac/stm32l162vc-a" ]
+stm32l162vc = [ "stm32-metapac/stm32l162vc" ]
+stm32l162vd-x = [ "stm32-metapac/stm32l162vd-x" ]
+stm32l162vd = [ "stm32-metapac/stm32l162vd" ]
+stm32l162ve = [ "stm32-metapac/stm32l162ve" ]
+stm32l162zc = [ "stm32-metapac/stm32l162zc" ]
+stm32l162zd = [ "stm32-metapac/stm32l162zd" ]
+stm32l162ze = [ "stm32-metapac/stm32l162ze" ]
 stm32l412c8 = [ "stm32-metapac/stm32l412c8" ]
 stm32l412cb = [ "stm32-metapac/stm32l412cb" ]
 stm32l412k8 = [ "stm32-metapac/stm32l412k8" ]
diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index 8bb78a6f2..32115f9a8 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -85,13 +85,28 @@ fn main() {
         };
     );
 
-    let mut chip_and_core = chip_name.split('_');
-    let chip = chip_and_core.next().expect("Unexpected stm32xx feature");
+    let mut s = chip_name.split('_');
+    let mut chip_name: String = s.next().unwrap().to_string();
+    let core_name = if let Some(c) = s.next() {
+        if !c.starts_with("CM") {
+            chip_name.push('_');
+            chip_name.push_str(c);
+            None
+        } else {
+            Some(c)
+        }
+    } else {
+        None
+    };
 
-    if let Some(core) = chip_and_core.next() {
-        println!("cargo:rustc-cfg={}_{}", &chip[..(chip.len() - 2)], core);
+    if let Some(core) = core_name {
+        println!(
+            "cargo:rustc-cfg={}_{}",
+            &chip_name[..chip_name.len() - 2],
+            core
+        );
     } else {
-        println!("cargo:rustc-cfg={}", &chip[..(chip.len() - 2)]);
+        println!("cargo:rustc-cfg={}", &chip_name[..chip_name.len() - 2]);
     }
 
     println!("cargo:rerun-if-changed=build.rs");
diff --git a/embassy-stm32/src/rcc/l1/mod.rs b/embassy-stm32/src/rcc/l1/mod.rs
new file mode 100644
index 000000000..25b5609c4
--- /dev/null
+++ b/embassy-stm32/src/rcc/l1/mod.rs
@@ -0,0 +1,235 @@
+pub use super::types::*;
+use crate::pac;
+use crate::peripherals::{self, RCC};
+use crate::rcc::{get_freqs, set_freqs, Clocks};
+use crate::time::Hertz;
+use crate::time::U32Ext;
+use core::marker::PhantomData;
+use embassy::util::Unborrow;
+use embassy_hal_common::unborrow;
+use pac::rcc::vals::{Hpre, Ppre, Sw};
+
+/// Most of clock setup is copied from rcc/l0
+
+/// HSI speed
+pub const HSI_FREQ: u32 = 16_000_000;
+
+/// System clock mux source
+#[derive(Clone, Copy)]
+pub enum ClockSrc {
+    MSI(MSIRange),
+    HSE(Hertz),
+    HSI,
+}
+
+impl Into<Ppre> for APBPrescaler {
+    fn into(self) -> Ppre {
+        match self {
+            APBPrescaler::NotDivided => Ppre::DIV1,
+            APBPrescaler::Div2 => Ppre::DIV2,
+            APBPrescaler::Div4 => Ppre::DIV4,
+            APBPrescaler::Div8 => Ppre::DIV8,
+            APBPrescaler::Div16 => Ppre::DIV16,
+        }
+    }
+}
+
+impl Into<Hpre> for AHBPrescaler {
+    fn into(self) -> Hpre {
+        match self {
+            AHBPrescaler::NotDivided => Hpre::DIV1,
+            AHBPrescaler::Div2 => Hpre::DIV2,
+            AHBPrescaler::Div4 => Hpre::DIV4,
+            AHBPrescaler::Div8 => Hpre::DIV8,
+            AHBPrescaler::Div16 => Hpre::DIV16,
+            AHBPrescaler::Div64 => Hpre::DIV64,
+            AHBPrescaler::Div128 => Hpre::DIV128,
+            AHBPrescaler::Div256 => Hpre::DIV256,
+            AHBPrescaler::Div512 => Hpre::DIV512,
+        }
+    }
+}
+
+impl Into<u8> for MSIRange {
+    fn into(self) -> u8 {
+        match self {
+            MSIRange::Range0 => 0b000,
+            MSIRange::Range1 => 0b001,
+            MSIRange::Range2 => 0b010,
+            MSIRange::Range3 => 0b011,
+            MSIRange::Range4 => 0b100,
+            MSIRange::Range5 => 0b101,
+            MSIRange::Range6 => 0b110,
+        }
+    }
+}
+
+/// Clocks configutation
+pub struct Config {
+    mux: ClockSrc,
+    ahb_pre: AHBPrescaler,
+    apb1_pre: APBPrescaler,
+    apb2_pre: APBPrescaler,
+}
+
+impl Default for Config {
+    #[inline]
+    fn default() -> Config {
+        Config {
+            mux: ClockSrc::MSI(MSIRange::default()),
+            ahb_pre: AHBPrescaler::NotDivided,
+            apb1_pre: APBPrescaler::NotDivided,
+            apb2_pre: APBPrescaler::NotDivided,
+        }
+    }
+}
+
+impl Config {
+    #[inline]
+    pub fn clock_src(mut self, mux: ClockSrc) -> Self {
+        self.mux = mux;
+        self
+    }
+
+    #[inline]
+    pub fn ahb_pre(mut self, pre: AHBPrescaler) -> Self {
+        self.ahb_pre = pre;
+        self
+    }
+
+    #[inline]
+    pub fn apb1_pre(mut self, pre: APBPrescaler) -> Self {
+        self.apb1_pre = pre;
+        self
+    }
+
+    #[inline]
+    pub fn apb2_pre(mut self, pre: APBPrescaler) -> Self {
+        self.apb2_pre = pre;
+        self
+    }
+}
+
+/// RCC peripheral
+pub struct Rcc<'d> {
+    _rb: peripherals::RCC,
+    phantom: PhantomData<&'d mut peripherals::RCC>,
+}
+
+impl<'d> Rcc<'d> {
+    pub fn new(rcc: impl Unborrow<Target = peripherals::RCC> + 'd) -> Self {
+        unborrow!(rcc);
+        Self {
+            _rb: rcc,
+            phantom: PhantomData,
+        }
+    }
+
+    // Safety: RCC init must have been called
+    pub fn clocks(&self) -> &'static Clocks {
+        unsafe { get_freqs() }
+    }
+}
+
+/// Extension trait that freezes the `RCC` peripheral with provided clocks configuration
+pub trait RccExt {
+    fn freeze(self, config: Config) -> Clocks;
+}
+
+impl RccExt for RCC {
+    // `cfgr` is almost always a constant, so make sure it can be constant-propagated properly by
+    // marking this function and all `Config` constructors and setters as `#[inline]`.
+    // This saves ~900 Bytes for the `pwr.rs` example.
+    #[inline]
+    fn freeze(self, cfgr: Config) -> Clocks {
+        let rcc = pac::RCC;
+        let (sys_clk, sw) = match cfgr.mux {
+            ClockSrc::MSI(range) => {
+                // Set MSI range
+                unsafe {
+                    rcc.icscr().write(|w| w.set_msirange(range.into()));
+                }
+
+                // Enable MSI
+                unsafe {
+                    rcc.cr().write(|w| w.set_msion(true));
+                    while !rcc.cr().read().msirdy() {}
+                }
+
+                let freq = 32_768 * (1 << (range as u8 + 1));
+                (freq, Sw::MSI)
+            }
+            ClockSrc::HSI => {
+                // Enable HSI
+                unsafe {
+                    rcc.cr().write(|w| w.set_hsion(true));
+                    while !rcc.cr().read().hsirdy() {}
+                }
+
+                (HSI_FREQ, Sw::HSI)
+            }
+            ClockSrc::HSE(freq) => {
+                // Enable HSE
+                unsafe {
+                    rcc.cr().write(|w| w.set_hseon(true));
+                    while !rcc.cr().read().hserdy() {}
+                }
+
+                (freq.0, Sw::HSE)
+            }
+        };
+
+        unsafe {
+            rcc.cfgr().modify(|w| {
+                w.set_sw(sw.into());
+                w.set_hpre(cfgr.ahb_pre.into());
+                w.set_ppre1(cfgr.apb1_pre.into());
+                w.set_ppre2(cfgr.apb2_pre.into());
+            });
+        }
+
+        let ahb_freq: u32 = match cfgr.ahb_pre {
+            AHBPrescaler::NotDivided => sys_clk,
+            pre => {
+                let pre: Hpre = pre.into();
+                let pre = 1 << (pre.0 as u32 - 7);
+                sys_clk / pre
+            }
+        };
+
+        let (apb1_freq, apb1_tim_freq) = match cfgr.apb1_pre {
+            APBPrescaler::NotDivided => (ahb_freq, ahb_freq),
+            pre => {
+                let pre: Ppre = pre.into();
+                let pre: u8 = 1 << (pre.0 - 3);
+                let freq = ahb_freq / pre as u32;
+                (freq, freq * 2)
+            }
+        };
+
+        let (apb2_freq, apb2_tim_freq) = match cfgr.apb2_pre {
+            APBPrescaler::NotDivided => (ahb_freq, ahb_freq),
+            pre => {
+                let pre: Ppre = pre.into();
+                let pre: u8 = 1 << (pre.0 - 3);
+                let freq = ahb_freq / (1 << (pre as u8 - 3));
+                (freq, freq * 2)
+            }
+        };
+
+        Clocks {
+            sys: sys_clk.hz(),
+            ahb: ahb_freq.hz(),
+            apb1: apb1_freq.hz(),
+            apb2: apb2_freq.hz(),
+            apb1_tim: apb1_tim_freq.hz(),
+            apb2_tim: apb2_tim_freq.hz(),
+        }
+    }
+}
+
+pub unsafe fn init(config: Config) {
+    let r = <peripherals::RCC as embassy::util::Steal>::steal();
+    let clocks = r.freeze(config);
+    set_freqs(clocks);
+}
diff --git a/embassy-stm32/src/rcc/mod.rs b/embassy-stm32/src/rcc/mod.rs
index 791b86c0d..d6b4bec5f 100644
--- a/embassy-stm32/src/rcc/mod.rs
+++ b/embassy-stm32/src/rcc/mod.rs
@@ -27,7 +27,7 @@ pub struct Clocks {
     #[cfg(rcc_wl5)]
     pub apb3: Hertz,
 
-    #[cfg(any(rcc_l0, rcc_f0, rcc_f0x0, rcc_g0))]
+    #[cfg(any(rcc_l0, rcc_l1, rcc_f0, rcc_f0x0, rcc_g0))]
     pub ahb: Hertz,
 
     #[cfg(any(rcc_l4, rcc_f4, rcc_h7, rcc_wb, rcc_wl5))]
@@ -73,6 +73,9 @@ cfg_if::cfg_if! {
     } else if #[cfg(rcc_l0)] {
         mod l0;
         pub use l0::*;
+    } else if #[cfg(rcc_l1)] {
+        mod l1;
+        pub use l1::*;
     } else if #[cfg(rcc_l4)] {
         mod l4;
         pub use l4::*;
diff --git a/examples/stm32l1/.cargo/config.toml b/examples/stm32l1/.cargo/config.toml
new file mode 100644
index 000000000..e0d2bddf0
--- /dev/null
+++ b/examples/stm32l1/.cargo/config.toml
@@ -0,0 +1,18 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace your chip as listed in `probe-run --list-chips`
+runner = "probe-run --chip STM32L151CBxxA"
+
+rustflags = [
+  # LLD (shipped with the Rust toolchain) is used as the default linker
+  "-C", "link-arg=--nmagic",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+
+  # Code-size optimizations.
+  "-Z", "trap-unreachable=no",
+  "-C", "inline-threshold=5",
+  "-C", "no-vectorize-loops",
+]
+
+[build]
+target = "thumbv7m-none-eabi"
diff --git a/examples/stm32l1/Cargo.toml b/examples/stm32l1/Cargo.toml
new file mode 100644
index 000000000..e4dd7186a
--- /dev/null
+++ b/examples/stm32l1/Cargo.toml
@@ -0,0 +1,35 @@
+[package]
+authors = ["Dario Nieuwenhuis <[email protected]>", "Ulf Lilleengen <[email protected]>"]
+edition = "2018"
+name = "embassy-stm32l1-examples"
+version = "0.1.0"
+resolver = "2"
+
+[features]
+default = [
+    "defmt-default",
+]
+defmt-default = []
+defmt-trace = []
+defmt-debug = []
+defmt-info = []
+defmt-warn = []
+defmt-error = []
+
+[dependencies]
+embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-trace"] }
+embassy-traits = { version = "0.1.0", path = "../../embassy-traits", features = ["defmt"] }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "defmt-trace", "stm32l151cb-a", "time-driver-tim2", "memory-x"]  }
+embassy-hal-common = {version = "0.1.0", path = "../../embassy-hal-common" }
+embassy-macros = { path = "../../embassy-macros" }
+
+defmt = "0.2.3"
+defmt-rtt = "0.2.0"
+
+cortex-m = "0.7.3"
+cortex-m-rt = "0.7.0"
+embedded-hal = "0.2.6"
+panic-probe = { version = "0.2.0", features = ["print-defmt"] }
+futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
+rtt-target = { version = "0.3.1", features = ["cortex-m"] }
+heapless = { version = "0.7.5", default-features = false }
diff --git a/examples/stm32l1/build.rs b/examples/stm32l1/build.rs
new file mode 100644
index 000000000..d534cc3df
--- /dev/null
+++ b/examples/stm32l1/build.rs
@@ -0,0 +1,31 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // By default, Cargo will re-run a build script whenever
+    // any file in the project changes. By specifying `memory.x`
+    // here, we ensure the build script is only re-run when
+    // `memory.x` is changed.
+    println!("cargo:rerun-if-changed=memory.x");
+}
diff --git a/examples/stm32l1/memory.x b/examples/stm32l1/memory.x
new file mode 100644
index 000000000..c94d395c8
--- /dev/null
+++ b/examples/stm32l1/memory.x
@@ -0,0 +1,5 @@
+MEMORY
+{
+  FLASH : ORIGIN = 0x08000000, LENGTH = 128K
+  RAM : ORIGIN = 0x20000000, LENGTH = 32K
+}
diff --git a/examples/stm32l1/src/bin/blinky.rs b/examples/stm32l1/src/bin/blinky.rs
new file mode 100644
index 000000000..deabdddba
--- /dev/null
+++ b/examples/stm32l1/src/bin/blinky.rs
@@ -0,0 +1,30 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+
+use embassy::executor::Spawner;
+use embassy::time::{Duration, Timer};
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::Peripherals;
+use embedded_hal::digital::v2::OutputPin;
+use example_common::*;
+
+#[embassy::main]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World!");
+
+    let mut led = Output::new(p.PA12, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        unwrap!(led.set_high());
+        Timer::after(Duration::from_millis(1000)).await;
+
+        info!("low");
+        unwrap!(led.set_low());
+        Timer::after(Duration::from_millis(1000)).await;
+    }
+}
diff --git a/examples/stm32l1/src/bin/spi.rs b/examples/stm32l1/src/bin/spi.rs
new file mode 100644
index 000000000..3cfbe3fc4
--- /dev/null
+++ b/examples/stm32l1/src/bin/spi.rs
@@ -0,0 +1,43 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+
+use embassy::executor::Spawner;
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embedded_hal::digital::v2::OutputPin;
+use example_common::*;
+
+use embassy_stm32::dma::NoDma;
+use embassy_stm32::spi::{Config, Spi};
+use embassy_stm32::time::Hertz;
+use embassy_stm32::Peripherals;
+use embedded_hal::blocking::spi::Transfer;
+
+#[embassy::main]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World, folks!");
+
+    let mut spi = Spi::new(
+        p.SPI1,
+        p.PA5,
+        p.PA7,
+        p.PA6,
+        NoDma,
+        NoDma,
+        Hertz(1_000_000),
+        Config::default(),
+    );
+
+    let mut cs = Output::new(p.PA4, Level::High, Speed::VeryHigh);
+
+    loop {
+        let mut buf = [0x0Au8; 4];
+        unwrap!(cs.set_low());
+        unwrap!(spi.transfer(&mut buf));
+        unwrap!(cs.set_high());
+        info!("xfer {=[u8]:x}", buf);
+    }
+}
diff --git a/examples/stm32l1/src/example_common.rs b/examples/stm32l1/src/example_common.rs
new file mode 100644
index 000000000..54d633837
--- /dev/null
+++ b/examples/stm32l1/src/example_common.rs
@@ -0,0 +1,17 @@
+#![macro_use]
+
+use defmt_rtt as _; // global logger
+use panic_probe as _;
+
+pub use defmt::*;
+
+use core::sync::atomic::{AtomicUsize, Ordering};
+
+defmt::timestamp! {"{=u64}", {
+        static COUNT: AtomicUsize = AtomicUsize::new(0);
+        // NOTE(no-CAS) `timestamps` runs with interrupts disabled
+        let n = COUNT.load(Ordering::Relaxed);
+        COUNT.store(n + 1, Ordering::Relaxed);
+        n as u64
+    }
+}
diff --git a/examples/stm32l4/.cargo/config.toml b/examples/stm32l4/.cargo/config.toml
index 38dd98d1e..b157e3aeb 100644
--- a/examples/stm32l4/.cargo/config.toml
+++ b/examples/stm32l4/.cargo/config.toml
@@ -1,6 +1,7 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
 # replace STM32F429ZITx with your chip as listed in `probe-run --list-chips`
-runner = "probe-run --chip STM32L4S5VI"
+#runner = "probe-run --chip STM32L475VGT6"
+runner = "probe-run --chip STM32L475VG"
 
 rustflags = [
   # LLD (shipped with the Rust toolchain) is used as the default linker
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index d7ad907fd..8f3473433 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -3,4 +3,4 @@
 [toolchain]
 channel = "nightly-2021-08-18"
 components = [ "rust-src", "rustfmt" ]
-targets = [ "thumbv7em-none-eabi", "thumbv6m-none-eabi", "thumbv7em-none-eabihf", "wasm32-unknown-unknown" ]
+targets = [ "thumbv7em-none-eabi", "thumbv7m-none-eabi", "thumbv6m-none-eabi", "thumbv7em-none-eabihf", "wasm32-unknown-unknown" ]
diff --git a/stm32-data b/stm32-data
-Subproject 3fb217ad3eebe2d8808b8af4d04ce051c69ecb7
+Subproject 7f5f8e7c641d74a0e97e2d84bac61b7c6c267a7
diff --git a/stm32-gen-features/src/lib.rs b/stm32-gen-features/src/lib.rs
index 597d78b07..75eb7d756 100644
--- a/stm32-gen-features/src/lib.rs
+++ b/stm32-gen-features/src/lib.rs
@@ -2,11 +2,12 @@
 
 use std::{iter::FilterMap, path::Path, slice::Iter};
 
-const SUPPORTED_FAMILIES: [&str; 8] = [
+const SUPPORTED_FAMILIES: [&str; 9] = [
     "stm32f0",
     "stm32f4",
     "stm32g0",
     "stm32l0",
+    "stm32l1",
     "stm32l4",
     "stm32h7",
     "stm32wb55",
diff --git a/stm32-metapac-gen/src/assets/build.rs b/stm32-metapac-gen/src/assets/build.rs
index 4110fe485..1c9411151 100644
--- a/stm32-metapac-gen/src/assets/build.rs
+++ b/stm32-metapac-gen/src/assets/build.rs
@@ -9,6 +9,17 @@ fn main() {
         .unwrap()
         .to_ascii_lowercase();
 
+    let mut s = chip_name.split('_');
+    let mut chip_name: String = s.next().unwrap().to_string();
+    if let Some(c) = s.next() {
+        if !c.starts_with("CM") {
+            chip_name.push('-');
+        } else {
+            chip_name.push('_');
+        }
+        chip_name.push_str(c);
+    }
+
     #[cfg(feature = "memory-x")]
     println!("cargo:rustc-link-search=src/chips/{}/memory_x/", _chip_name);
 
diff --git a/stm32-metapac-gen/src/lib.rs b/stm32-metapac-gen/src/lib.rs
index 3bfd5297f..5c0f1d00c 100644
--- a/stm32-metapac-gen/src/lib.rs
+++ b/stm32-metapac-gen/src/lib.rs
@@ -218,7 +218,7 @@ pub fn gen(options: Options) {
         let core_name: Option<&str> = if let Some(c) = s.next() {
             if !c.starts_with("CM") {
                 println!("Core not detected, adding as variant");
-                chip_name.push_str("-");
+                chip_name.push('-');
                 chip_name.push_str(c);
                 None
             } else {
diff --git a/stm32-metapac/build.rs b/stm32-metapac/build.rs
index ca964c9ec..d840d8fe0 100644
--- a/stm32-metapac/build.rs
+++ b/stm32-metapac/build.rs
@@ -22,6 +22,17 @@ fn main() {
         chips: vec![chip_name.clone()],
     });
 
+    let mut s = chip_name.split('_');
+    let mut chip_name: String = s.next().unwrap().to_string();
+    if let Some(c) = s.next() {
+        if !c.starts_with("CM") {
+            chip_name.push('-');
+        } else {
+            chip_name.push('_');
+        }
+        chip_name.push_str(c);
+    }
+
     println!(
         "cargo:rustc-link-search={}/src/chips/{}",
         out_dir.display(),