21 files changed, 440 insertions, 13 deletions

diff --git a/examples/boot/application/stm32wl/memory.x b/examples/boot/application/stm32wl/memory.x
index e1d4e7fa8..5af1723f5 100644
--- a/examples/boot/application/stm32wl/memory.x
+++ b/examples/boot/application/stm32wl/memory.x
@@ -5,7 +5,8 @@ MEMORY
   BOOTLOADER_STATE                  : ORIGIN = 0x08006000, LENGTH = 4K
   FLASH                             : ORIGIN = 0x08008000, LENGTH = 64K
   DFU                               : ORIGIN = 0x08018000, LENGTH = 68K
-  RAM                         (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
+  SHARED_RAM                  (rwx) : ORIGIN = 0x20000000, LENGTH = 64
+  RAM                         (rwx) : ORIGIN = 0x20000040, LENGTH = 32K - 64
 }
 
 __bootloader_state_start = ORIGIN(BOOTLOADER_STATE) - ORIGIN(BOOTLOADER);
@@ -13,3 +14,11 @@ __bootloader_state_end = ORIGIN(BOOTLOADER_STATE) + LENGTH(BOOTLOADER_STATE) - O
 
 __bootloader_dfu_start = ORIGIN(DFU) - ORIGIN(BOOTLOADER);
 __bootloader_dfu_end = ORIGIN(DFU) + LENGTH(DFU) - ORIGIN(BOOTLOADER);
+
+SECTIONS
+{
+    .shared_data :
+    {
+        *(.shared_data)
+    } > SHARED_RAM
+}
\ No newline at end of file
diff --git a/examples/boot/application/stm32wl/src/bin/a.rs b/examples/boot/application/stm32wl/src/bin/a.rs
index 9f4f0b238..127de0237 100644
--- a/examples/boot/application/stm32wl/src/bin/a.rs
+++ b/examples/boot/application/stm32wl/src/bin/a.rs
@@ -1,6 +1,8 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 #[cfg(feature = "defmt")]
 use defmt_rtt::*;
 use embassy_boot_stm32::{AlignedBuffer, FirmwareUpdater, FirmwareUpdaterConfig};
@@ -9,6 +11,7 @@ use embassy_executor::Spawner;
 use embassy_stm32::exti::ExtiInput;
 use embassy_stm32::flash::{Flash, WRITE_SIZE};
 use embassy_stm32::gpio::{Level, Output, Pull, Speed};
+use embassy_stm32::SharedData;
 use embassy_sync::mutex::Mutex;
 use panic_reset as _;
 
@@ -17,9 +20,12 @@ static APP_B: &[u8] = &[0, 1, 2, 3];
 #[cfg(not(feature = "skip-include"))]
 static APP_B: &[u8] = include_bytes!("../../b.bin");
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init_primary(Default::default(), &SHARED_DATA);
     let flash = Flash::new_blocking(p.FLASH);
     let flash = Mutex::new(BlockingAsync::new(flash));
 
diff --git a/examples/boot/application/stm32wl/src/bin/b.rs b/examples/boot/application/stm32wl/src/bin/b.rs
index e954d8b91..768dadf8b 100644
--- a/examples/boot/application/stm32wl/src/bin/b.rs
+++ b/examples/boot/application/stm32wl/src/bin/b.rs
@@ -1,16 +1,22 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 #[cfg(feature = "defmt")]
 use defmt_rtt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::SharedData;
 use embassy_time::Timer;
 use panic_reset as _;
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init_primary(Default::default(), &SHARED_DATA);
     let mut led = Output::new(p.PB15, Level::High, Speed::Low);
 
     loop {
diff --git a/examples/stm32h755cm4/.cargo/config.toml b/examples/stm32h755cm4/.cargo/config.toml
new file mode 100644
index 000000000..193e6bbc3
--- /dev/null
+++ b/examples/stm32h755cm4/.cargo/config.toml
@@ -0,0 +1,8 @@
+[target.thumbv7em-none-eabihf]
+runner = 'probe-rs run --chip STM32H755ZITx --catch-hardfault --always-print-stacktrace'
+
+[build]
+target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
+
+[env]
+DEFMT_LOG = "trace"
diff --git a/examples/stm32h755cm4/Cargo.toml b/examples/stm32h755cm4/Cargo.toml
new file mode 100644
index 000000000..9d2fb9060
--- /dev/null
+++ b/examples/stm32h755cm4/Cargo.toml
@@ -0,0 +1,75 @@
+[package]
+edition = "2021"
+name = "embassy-stm32h7-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+
+[dependencies]
+# Change stm32h755zi-cm4 to your chip name, if necessary.
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32h755zi-cm4", "time-driver-tim2", "exti", "memory-x", "unstable-pac", "chrono"] }
+embassy-sync = { version = "0.6.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-embedded-hal = { version = "0.2.0", path = "../../embassy-embedded-hal" }
+embassy-executor = { version = "0.6.0", path = "../../embassy-executor", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
+embassy-time = { version = "0.3.1", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-net = { version = "0.4.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6", "dns"] }
+embassy-usb = { version = "0.3.0", path = "../../embassy-usb", features = ["defmt"] }
+embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
+
+defmt = "0.3"
+defmt-rtt = "0.4"
+
+cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.0"
+embedded-hal = "0.2.6"
+embedded-hal-1 = { package = "embedded-hal", version = "1.0" }
+embedded-hal-async = { version = "1.0" }
+embedded-nal-async = { version = "0.7.1" }
+embedded-io-async = { version = "0.6.1" }
+panic-probe = { version = "0.3", features = ["print-defmt"] }
+heapless = { version = "0.8", default-features = false }
+rand_core = "0.6.3"
+critical-section = "1.1"
+micromath = "2.0.0"
+stm32-fmc = "0.3.0"
+embedded-storage = "0.3.1"
+static_cell = "2"
+chrono = { version = "^0.4", default-features = false }
+grounded = "0.2.0"
+
+# cargo build/run
+[profile.dev]
+codegen-units = 1
+debug = 2
+debug-assertions = true # <-
+incremental = false
+opt-level = 3 # <-
+overflow-checks = true # <-
+
+# cargo test
+[profile.test]
+codegen-units = 1
+debug = 2
+debug-assertions = true # <-
+incremental = false
+opt-level = 3 # <-
+overflow-checks = true # <-
+
+# cargo build/run --release
+[profile.release]
+codegen-units = 1
+debug = 2
+debug-assertions = false # <-
+incremental = false
+lto = 'fat'
+opt-level = 3 # <-
+overflow-checks = false # <-
+
+# cargo test --release
+[profile.bench]
+codegen-units = 1
+debug = 2
+debug-assertions = false # <-
+incremental = false
+lto = 'fat'
+opt-level = 3 # <-
+overflow-checks = false # <-
diff --git a/examples/stm32h755cm4/build.rs b/examples/stm32h755cm4/build.rs
new file mode 100644
index 000000000..30691aa97
--- /dev/null
+++ b/examples/stm32h755cm4/build.rs
@@ -0,0 +1,35 @@
+//! 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");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}
diff --git a/examples/stm32h755cm4/memory.x b/examples/stm32h755cm4/memory.x
new file mode 100644
index 000000000..7d60354e3
--- /dev/null
+++ b/examples/stm32h755cm4/memory.x
@@ -0,0 +1,15 @@
+MEMORY
+{
+    FLASH    : ORIGIN = 0x08100000, LENGTH = 1024K /* BANK_2 */
+    RAM      : ORIGIN = 0x10000000, LENGTH = 128K  /* SRAM1 */
+    RAM_D3   : ORIGIN = 0x38000000, LENGTH = 64K   /* SRAM4 */
+}
+
+SECTIONS
+{
+    .ram_d3 :
+    {
+        *(.ram_d3.shared_data)
+        *(.ram_d3)
+    } > RAM_D3
+}
\ No newline at end of file
diff --git a/examples/stm32h755cm4/src/bin/blinky.rs b/examples/stm32h755cm4/src/bin/blinky.rs
new file mode 100644
index 000000000..b5c547839
--- /dev/null
+++ b/examples/stm32h755cm4/src/bin/blinky.rs
@@ -0,0 +1,32 @@
+#![no_std]
+#![no_main]
+
+use core::mem::MaybeUninit;
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::SharedData;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[link_section = ".ram_d3.shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_stm32::init_secondary(&SHARED_DATA);
+    info!("Hello World!");
+
+    let mut led = Output::new(p.PE1, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        led.set_high();
+        Timer::after_millis(250).await;
+
+        info!("low");
+        led.set_low();
+        Timer::after_millis(250).await;
+    }
+}
diff --git a/examples/stm32h755cm7/.cargo/config.toml b/examples/stm32h755cm7/.cargo/config.toml
new file mode 100644
index 000000000..193e6bbc3
--- /dev/null
+++ b/examples/stm32h755cm7/.cargo/config.toml
@@ -0,0 +1,8 @@
+[target.thumbv7em-none-eabihf]
+runner = 'probe-rs run --chip STM32H755ZITx --catch-hardfault --always-print-stacktrace'
+
+[build]
+target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
+
+[env]
+DEFMT_LOG = "trace"
diff --git a/examples/stm32h755cm7/Cargo.toml b/examples/stm32h755cm7/Cargo.toml
new file mode 100644
index 000000000..ab088fd33
--- /dev/null
+++ b/examples/stm32h755cm7/Cargo.toml
@@ -0,0 +1,75 @@
+[package]
+edition = "2021"
+name = "embassy-stm32h7-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+
+[dependencies]
+# Change stm32h743bi to your chip name, if necessary.
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "stm32h755zi-cm7", "time-driver-tim3", "exti", "memory-x", "unstable-pac", "chrono"] }
+embassy-sync = { version = "0.6.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-embedded-hal = { version = "0.2.0", path = "../../embassy-embedded-hal" }
+embassy-executor = { version = "0.6.0", path = "../../embassy-executor", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
+embassy-time = { version = "0.3.1", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-net = { version = "0.4.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6", "dns"] }
+embassy-usb = { version = "0.3.0", path = "../../embassy-usb", features = ["defmt"] }
+embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
+
+defmt = "0.3"
+defmt-rtt = "0.4"
+
+cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.0"
+embedded-hal = "0.2.6"
+embedded-hal-1 = { package = "embedded-hal", version = "1.0" }
+embedded-hal-async = { version = "1.0" }
+embedded-nal-async = { version = "0.7.1" }
+embedded-io-async = { version = "0.6.1" }
+panic-probe = { version = "0.3", features = ["print-defmt"] }
+heapless = { version = "0.8", default-features = false }
+rand_core = "0.6.3"
+critical-section = "1.1"
+micromath = "2.0.0"
+stm32-fmc = "0.3.0"
+embedded-storage = "0.3.1"
+static_cell = "2"
+chrono = { version = "^0.4", default-features = false }
+grounded = "0.2.0"
+
+# cargo build/run
+[profile.dev]
+codegen-units = 1
+debug = 2
+debug-assertions = true # <-
+incremental = false
+opt-level = 3 # <-
+overflow-checks = true # <-
+
+# cargo test
+[profile.test]
+codegen-units = 1
+debug = 2
+debug-assertions = true # <-
+incremental = false
+opt-level = 3 # <-
+overflow-checks = true # <-
+
+# cargo build/run --release
+[profile.release]
+codegen-units = 1
+debug = 2
+debug-assertions = false # <-
+incremental = false
+lto = 'fat'
+opt-level = 3 # <-
+overflow-checks = false # <-
+
+# cargo test --release
+[profile.bench]
+codegen-units = 1
+debug = 2
+debug-assertions = false # <-
+incremental = false
+lto = 'fat'
+opt-level = 3 # <-
+overflow-checks = false # <-
diff --git a/examples/stm32h755cm7/build.rs b/examples/stm32h755cm7/build.rs
new file mode 100644
index 000000000..30691aa97
--- /dev/null
+++ b/examples/stm32h755cm7/build.rs
@@ -0,0 +1,35 @@
+//! 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");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}
diff --git a/examples/stm32h755cm7/memory.x b/examples/stm32h755cm7/memory.x
new file mode 100644
index 000000000..ef884796a
--- /dev/null
+++ b/examples/stm32h755cm7/memory.x
@@ -0,0 +1,15 @@
+MEMORY
+{
+    FLASH    : ORIGIN = 0x08000000, LENGTH = 1024K /* BANK_1 */
+    RAM      : ORIGIN = 0x24000000, LENGTH = 512K  /* AXIRAM */
+    RAM_D3   : ORIGIN = 0x38000000, LENGTH = 64K   /* SRAM4 */
+}
+
+SECTIONS
+{
+    .ram_d3 :
+    {
+        *(.ram_d3.shared_data)
+        *(.ram_d3)
+    } > RAM_D3
+}
\ No newline at end of file
diff --git a/examples/stm32h755cm7/src/bin/blinky.rs b/examples/stm32h755cm7/src/bin/blinky.rs
new file mode 100644
index 000000000..94d2226c0
--- /dev/null
+++ b/examples/stm32h755cm7/src/bin/blinky.rs
@@ -0,0 +1,54 @@
+#![no_std]
+#![no_main]
+
+use core::mem::MaybeUninit;
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::SharedData;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[link_section = ".ram_d3.shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let mut config = embassy_stm32::Config::default();
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
+        config.rcc.csi = true;
+        config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
+            prediv: PllPreDiv::DIV4,
+            mul: PllMul::MUL50,
+            divp: Some(PllDiv::DIV2),
+            divq: Some(PllDiv::DIV8), // 100mhz
+            divr: None,
+        });
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
+        config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
+        config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.apb3_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.apb4_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.voltage_scale = VoltageScale::Scale1;
+        config.rcc.supply_config = SupplyConfig::DirectSMPS;
+    }
+    let p = embassy_stm32::init_primary(config, &SHARED_DATA);
+    info!("Hello World!");
+
+    let mut led = Output::new(p.PB14, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        led.set_high();
+        Timer::after_millis(500).await;
+
+        info!("low");
+        led.set_low();
+        Timer::after_millis(500).await;
+    }
+}
diff --git a/examples/stm32wl/memory.x b/examples/stm32wl/memory.x
new file mode 100644
index 000000000..0298caa4b
--- /dev/null
+++ b/examples/stm32wl/memory.x
@@ -0,0 +1,15 @@
+MEMORY
+{
+  /* NOTE 1 K = 1 KiBi = 1024 bytes */
+  FLASH                             : ORIGIN = 0x08000000, LENGTH = 256K
+  SHARED_RAM                  (rwx) : ORIGIN = 0x20000000, LENGTH = 64
+  RAM                         (rwx) : ORIGIN = 0x20000040, LENGTH = 64K - 64
+}
+
+SECTIONS
+{
+    .shared_data :
+    {
+        *(.shared_data)
+    } > SHARED_RAM
+}
\ No newline at end of file
diff --git a/examples/stm32wl/src/bin/blinky.rs b/examples/stm32wl/src/bin/blinky.rs
index 347bd093f..ce7d0ec58 100644
--- a/examples/stm32wl/src/bin/blinky.rs
+++ b/examples/stm32wl/src/bin/blinky.rs
@@ -1,15 +1,21 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::SharedData;
 use embassy_time::Timer;
 use {defmt_rtt as _, panic_probe as _};
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init_primary(Default::default(), &SHARED_DATA);
     info!("Hello World!");
 
     let mut led = Output::new(p.PB15, Level::High, Speed::Low);
diff --git a/examples/stm32wl/src/bin/button.rs b/examples/stm32wl/src/bin/button.rs
index eccd211e2..8b5204479 100644
--- a/examples/stm32wl/src/bin/button.rs
+++ b/examples/stm32wl/src/bin/button.rs
@@ -1,16 +1,22 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use cortex_m_rt::entry;
 use defmt::*;
 use embassy_stm32::gpio::{Input, Level, Output, Pull, Speed};
+use embassy_stm32::SharedData;
 use {defmt_rtt as _, panic_probe as _};
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[entry]
 fn main() -> ! {
     info!("Hello World!");
 
-    let p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init_primary(Default::default(), &SHARED_DATA);
 
     let button = Input::new(p.PA0, Pull::Up);
     let mut led1 = Output::new(p.PB15, Level::High, Speed::Low);
diff --git a/examples/stm32wl/src/bin/button_exti.rs b/examples/stm32wl/src/bin/button_exti.rs
index 27d5330bd..8dd1a6a5e 100644
--- a/examples/stm32wl/src/bin/button_exti.rs
+++ b/examples/stm32wl/src/bin/button_exti.rs
@@ -1,15 +1,21 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::exti::ExtiInput;
 use embassy_stm32::gpio::Pull;
+use embassy_stm32::SharedData;
 use {defmt_rtt as _, panic_probe as _};
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init_primary(Default::default(), &SHARED_DATA);
     info!("Hello World!");
 
     let mut button = ExtiInput::new(p.PA0, p.EXTI0, Pull::Up);
diff --git a/examples/stm32wl/src/bin/flash.rs b/examples/stm32wl/src/bin/flash.rs
index 0b7417c01..147f5d293 100644
--- a/examples/stm32wl/src/bin/flash.rs
+++ b/examples/stm32wl/src/bin/flash.rs
@@ -1,14 +1,20 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use defmt::{info, unwrap};
 use embassy_executor::Spawner;
 use embassy_stm32::flash::Flash;
+use embassy_stm32::SharedData;
 use {defmt_rtt as _, panic_probe as _};
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(Default::default());
+    let p = embassy_stm32::init_primary(Default::default(), &SHARED_DATA);
     info!("Hello Flash!");
 
     const ADDR: u32 = 0x36000;
diff --git a/examples/stm32wl/src/bin/random.rs b/examples/stm32wl/src/bin/random.rs
index 8e9fe02b2..df2ed0054 100644
--- a/examples/stm32wl/src/bin/random.rs
+++ b/examples/stm32wl/src/bin/random.rs
@@ -1,17 +1,22 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::rng::{self, Rng};
 use embassy_stm32::time::Hertz;
-use embassy_stm32::{bind_interrupts, peripherals};
+use embassy_stm32::{bind_interrupts, peripherals, SharedData};
 use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs{
     RNG => rng::InterruptHandler<peripherals::RNG>;
 });
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
@@ -32,7 +37,7 @@ async fn main(_spawner: Spawner) {
             divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
         });
     }
-    let p = embassy_stm32::init(config);
+    let p = embassy_stm32::init_primary(config, &SHARED_DATA);
 
     info!("Hello World!");
 
diff --git a/examples/stm32wl/src/bin/rtc.rs b/examples/stm32wl/src/bin/rtc.rs
index cf7d6d220..69a9ddc4c 100644
--- a/examples/stm32wl/src/bin/rtc.rs
+++ b/examples/stm32wl/src/bin/rtc.rs
@@ -1,15 +1,20 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use chrono::{NaiveDate, NaiveDateTime};
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::rtc::{Rtc, RtcConfig};
 use embassy_stm32::time::Hertz;
-use embassy_stm32::Config;
+use embassy_stm32::{Config, SharedData};
 use embassy_time::Timer;
 use {defmt_rtt as _, panic_probe as _};
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = Config::default();
@@ -31,7 +36,7 @@ async fn main(_spawner: Spawner) {
             divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
         });
     }
-    let p = embassy_stm32::init(config);
+    let p = embassy_stm32::init_primary(config, &SHARED_DATA);
     info!("Hello World!");
 
     let now = NaiveDate::from_ymd_opt(2020, 5, 15)
diff --git a/examples/stm32wl/src/bin/uart_async.rs b/examples/stm32wl/src/bin/uart_async.rs
index 3637243a0..ece9b9201 100644
--- a/examples/stm32wl/src/bin/uart_async.rs
+++ b/examples/stm32wl/src/bin/uart_async.rs
@@ -1,10 +1,12 @@
 #![no_std]
 #![no_main]
 
+use core::mem::MaybeUninit;
+
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::usart::{Config, InterruptHandler, Uart};
-use embassy_stm32::{bind_interrupts, peripherals};
+use embassy_stm32::{bind_interrupts, peripherals, SharedData};
 use {defmt_rtt as _, panic_probe as _};
 
 bind_interrupts!(struct Irqs{
@@ -12,6 +14,9 @@ bind_interrupts!(struct Irqs{
     LPUART1 => InterruptHandler<peripherals::LPUART1>;
 });
 
+#[link_section = ".shared_data"]
+static SHARED_DATA: MaybeUninit<SharedData> = MaybeUninit::uninit();
+
 /*
 Pass Incoming data from LPUART1 to USART1
 Example is written for the LoRa-E5 mini v1.0,
@@ -21,7 +26,7 @@ but can be surely changed for your needs.
 async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
     config.rcc.sys = embassy_stm32::rcc::Sysclk::HSE;
-    let p = embassy_stm32::init(config);
+    let p = embassy_stm32::init_primary(config, &SHARED_DATA);
 
     defmt::info!("Starting system");