examples Remove the `fn config()` idiom.

It was only useful for doing #[embassy_executor::main(config = "config()")]`. Now that
it's gone, it makes more sense to build the config in main directly.

30 files changed, 107 insertions, 215 deletions

diff --git a/examples/stm32f1/src/bin/hello.rs b/examples/stm32f1/src/bin/hello.rs
index 721b21c36..57892d3cc 100644
--- a/examples/stm32f1/src/bin/hello.rs
+++ b/examples/stm32f1/src/bin/hello.rs
@@ -9,15 +9,12 @@ use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(Hertz(36_000_000));
-    config
-}
+    let _p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) -> ! {
-    let _p = embassy_stm32::init(config());
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;
diff --git a/examples/stm32f1/src/bin/usb_serial.rs b/examples/stm32f1/src/bin/usb_serial.rs
index 7f27e6251..2301c51b6 100644
--- a/examples/stm32f1/src/bin/usb_serial.rs
+++ b/examples/stm32f1/src/bin/usb_serial.rs
@@ -15,17 +15,14 @@ use embassy_usb_serial::{CdcAcmClass, State};
 use futures::future::join;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.hse = Some(Hertz(8_000_000));
     config.rcc.sys_ck = Some(Hertz(48_000_000));
     config.rcc.pclk1 = Some(Hertz(24_000_000));
-    config
-}
+    let mut p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let mut p = embassy_stm32::init(config());
     info!("Hello World!");
 
     {
diff --git a/examples/stm32f2/src/bin/pll.rs b/examples/stm32f2/src/bin/pll.rs
index bc0c160ba..6fce7a716 100644
--- a/examples/stm32f2/src/bin/pll.rs
+++ b/examples/stm32f2/src/bin/pll.rs
@@ -14,8 +14,10 @@ use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-// Example config for maximum performance on a NUCLEO-F207ZG board
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    // Example config for maximum performance on a NUCLEO-F207ZG board
+
     let mut config = Config::default();
     // By default, HSE on the board comes from a 8 MHz clock signal (not a crystal)
     config.rcc.hse = Some(HSEConfig {
@@ -40,12 +42,9 @@ fn config() -> Config {
     config.rcc.apb1_pre = APBPrescaler::Div4;
     // 120 MHz / 2 = 60 MHz APB2 frequency
     config.rcc.apb2_pre = APBPrescaler::Div2;
-    config
-}
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let _p = embassy_stm32::init(config());
+    let _p = embassy_stm32::init(config);
+
     loop {
         Timer::after(Duration::from_millis(1000)).await;
         info!("1s elapsed");
diff --git a/examples/stm32f3/src/bin/hello.rs b/examples/stm32f3/src/bin/hello.rs
index 7846912c9..cd59f7409 100644
--- a/examples/stm32f3/src/bin/hello.rs
+++ b/examples/stm32f3/src/bin/hello.rs
@@ -9,16 +9,13 @@ use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.hse = Some(Hertz(8_000_000));
     config.rcc.sysclk = Some(Hertz(16_000_000));
-    config
-}
+    let _p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) -> ! {
-    let _p = embassy_stm32::init(config());
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;
diff --git a/examples/stm32f3/src/bin/usb_serial.rs b/examples/stm32f3/src/bin/usb_serial.rs
index 36d38d87f..757643ea5 100644
--- a/examples/stm32f3/src/bin/usb_serial.rs
+++ b/examples/stm32f3/src/bin/usb_serial.rs
@@ -15,21 +15,16 @@ use embassy_usb_serial::{CdcAcmClass, State};
 use futures::future::join;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
-
     config.rcc.hse = Some(mhz(8));
     config.rcc.sysclk = Some(mhz(48));
     config.rcc.pclk1 = Some(mhz(24));
     config.rcc.pclk2 = Some(mhz(24));
     config.rcc.pll48 = true;
+    let p = embassy_stm32::init(config);
 
-    config
-}
-
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     // Needed for nucleo-stm32f303ze
diff --git a/examples/stm32f4/src/bin/hello.rs b/examples/stm32f4/src/bin/hello.rs
index 6facb9bb7..26d3555a2 100644
--- a/examples/stm32f4/src/bin/hello.rs
+++ b/examples/stm32f4/src/bin/hello.rs
@@ -9,15 +9,12 @@ use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(Hertz(84_000_000));
-    config
-}
+    let _p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) -> ! {
-    let _p = embassy_stm32::init(config());
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;
diff --git a/examples/stm32f4/src/bin/sdmmc.rs b/examples/stm32f4/src/bin/sdmmc.rs
index 996694f2c..b8e56d2e1 100644
--- a/examples/stm32f4/src/bin/sdmmc.rs
+++ b/examples/stm32f4/src/bin/sdmmc.rs
@@ -9,15 +9,11 @@ use embassy_stm32::time::mhz;
 use embassy_stm32::{interrupt, Config};
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(48));
-    config
-}
-
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) -> ! {
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(48));
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     let irq = interrupt::take!(SDIO);
diff --git a/examples/stm32f7/src/bin/eth.rs b/examples/stm32f7/src/bin/eth.rs
index f8904fa03..1ec30353d 100644
--- a/examples/stm32f7/src/bin/eth.rs
+++ b/examples/stm32f7/src/bin/eth.rs
@@ -33,15 +33,12 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
     stack.run().await
 }
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(200));
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(spawner: Spawner) -> ! {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     // Generate random seed.
diff --git a/examples/stm32f7/src/bin/hello.rs b/examples/stm32f7/src/bin/hello.rs
index 6facb9bb7..26d3555a2 100644
--- a/examples/stm32f7/src/bin/hello.rs
+++ b/examples/stm32f7/src/bin/hello.rs
@@ -9,15 +9,12 @@ use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(Hertz(84_000_000));
-    config
-}
+    let _p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) -> ! {
-    let _p = embassy_stm32::init(config());
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;
diff --git a/examples/stm32f7/src/bin/sdmmc.rs b/examples/stm32f7/src/bin/sdmmc.rs
index 975c5b91f..9d97a1de4 100644
--- a/examples/stm32f7/src/bin/sdmmc.rs
+++ b/examples/stm32f7/src/bin/sdmmc.rs
@@ -9,15 +9,12 @@ use embassy_stm32::time::mhz;
 use embassy_stm32::{interrupt, Config};
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(200));
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) -> ! {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let irq = interrupt::take!(SDMMC1);
diff --git a/examples/stm32h7/src/bin/adc.rs b/examples/stm32h7/src/bin/adc.rs
index 96457e766..0715a0f62 100644
--- a/examples/stm32h7/src/bin/adc.rs
+++ b/examples/stm32h7/src/bin/adc.rs
@@ -11,18 +11,15 @@ use embassy_stm32::time::mhz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(200));
     config.rcc.per_ck = Some(mhz(64));
     config.rcc.adc_clock_source = AdcClockSource::PerCk;
-    config
-}
+    let mut p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let mut p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let mut adc = Adc::new(p.ADC3, &mut Delay);
diff --git a/examples/stm32h7/src/bin/camera.rs b/examples/stm32h7/src/bin/camera.rs
index 8e93a54c8..a281e75c9 100644
--- a/examples/stm32h7/src/bin/camera.rs
+++ b/examples/stm32h7/src/bin/camera.rs
@@ -10,10 +10,16 @@ use embassy_stm32::i2c::I2c;
 use embassy_stm32::rcc::{Mco, Mco1Source, McoClock};
 use embassy_stm32::time::{khz, mhz};
 use embassy_stm32::{interrupt, Config};
+use ov7725::*;
 use {defmt_rtt as _, panic_probe as _};
 
-#[allow(unused)]
-pub fn config() -> Config {
+const WIDTH: usize = 100;
+const HEIGHT: usize = 100;
+
+static mut FRAME: [u32; WIDTH * HEIGHT / 2] = [0u32; WIDTH * HEIGHT / 2];
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(400));
@@ -22,19 +28,8 @@ pub fn config() -> Config {
     config.rcc.pclk2 = Some(mhz(100));
     config.rcc.pclk3 = Some(mhz(100));
     config.rcc.pclk4 = Some(mhz(100));
-    config
-}
+    let p = embassy_stm32::init(config);
 
-use ov7725::*;
-
-const WIDTH: usize = 100;
-const HEIGHT: usize = 100;
-
-static mut FRAME: [u32; WIDTH * HEIGHT / 2] = [0u32; WIDTH * HEIGHT / 2];
-
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     defmt::info!("Hello World!");
     let mco = Mco::new(p.MCO1, p.PA8, Mco1Source::Hsi, McoClock::Divided(3));
 
diff --git a/examples/stm32h7/src/bin/dac.rs b/examples/stm32h7/src/bin/dac.rs
index dece74bba..f12716370 100644
--- a/examples/stm32h7/src/bin/dac.rs
+++ b/examples/stm32h7/src/bin/dac.rs
@@ -9,19 +9,15 @@ use embassy_stm32::time::mhz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(400));
-    config.rcc.hclk = Some(mhz(200));
-    config.rcc.pll1.q_ck = Some(mhz(100));
-    config
-}
-
 #[entry]
 fn main() -> ! {
     info!("Hello World, dude!");
 
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
+    let p = embassy_stm32::init(config);
 
     let mut dac = Dac::new_1ch(p.DAC1, p.PA4);
 
diff --git a/examples/stm32h7/src/bin/eth.rs b/examples/stm32h7/src/bin/eth.rs
index 7ad2f52c7..9039b7ee7 100644
--- a/examples/stm32h7/src/bin/eth.rs
+++ b/examples/stm32h7/src/bin/eth.rs
@@ -33,17 +33,13 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
     stack.run().await
 }
 
-pub fn config() -> Config {
+#[embassy_executor::main]
+async fn main(spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(200));
     config.rcc.pll1.q_ck = Some(mhz(100));
-    config
-}
-
-#[embassy_executor::main]
-async fn main(spawner: Spawner) -> ! {
-    let p = embassy_stm32::init(config());
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     // Generate random seed.
diff --git a/examples/stm32h7/src/bin/eth_client.rs b/examples/stm32h7/src/bin/eth_client.rs
index 736a2992e..25e75d71e 100644
--- a/examples/stm32h7/src/bin/eth_client.rs
+++ b/examples/stm32h7/src/bin/eth_client.rs
@@ -34,17 +34,13 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
     stack.run().await
 }
 
-pub fn config() -> Config {
+#[embassy_executor::main]
+async fn main(spawner: Spawner) -> ! {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(200));
     config.rcc.pll1.q_ck = Some(mhz(100));
-    config
-}
-
-#[embassy_executor::main]
-async fn main(spawner: Spawner) -> ! {
-    let p = embassy_stm32::init(config());
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     // Generate random seed.
diff --git a/examples/stm32h7/src/bin/fmc.rs b/examples/stm32h7/src/bin/fmc.rs
index 838427b0a..1a0d073d0 100644
--- a/examples/stm32h7/src/bin/fmc.rs
+++ b/examples/stm32h7/src/bin/fmc.rs
@@ -10,17 +10,14 @@ use embassy_stm32::time::mhz;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(200));
     config.rcc.pll1.q_ck = Some(mhz(100));
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let mut core_peri = cortex_m::Peripherals::take().unwrap();
diff --git a/examples/stm32h7/src/bin/low_level_timer_api.rs b/examples/stm32h7/src/bin/low_level_timer_api.rs
index e759c47a8..59648d4b4 100644
--- a/examples/stm32h7/src/bin/low_level_timer_api.rs
+++ b/examples/stm32h7/src/bin/low_level_timer_api.rs
@@ -12,7 +12,8 @@ use embassy_stm32::time::{khz, mhz, Hertz};
 use embassy_stm32::{into_ref, Config, Peripheral, PeripheralRef};
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(400));
@@ -21,12 +22,8 @@ pub fn config() -> Config {
     config.rcc.pclk2 = Some(mhz(100));
     config.rcc.pclk3 = Some(mhz(100));
     config.rcc.pclk4 = Some(mhz(100));
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let mut pwm = SimplePwm32::new(p.TIM5, p.PA0, p.PA1, p.PA2, p.PA3, khz(10));
diff --git a/examples/stm32h7/src/bin/pwm.rs b/examples/stm32h7/src/bin/pwm.rs
index 4797de0a0..b225d66e3 100644
--- a/examples/stm32h7/src/bin/pwm.rs
+++ b/examples/stm32h7/src/bin/pwm.rs
@@ -11,7 +11,8 @@ use embassy_stm32::time::{khz, mhz};
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.sys_ck = Some(mhz(400));
     config.rcc.hclk = Some(mhz(400));
@@ -20,12 +21,7 @@ pub fn config() -> Config {
     config.rcc.pclk2 = Some(mhz(100));
     config.rcc.pclk3 = Some(mhz(100));
     config.rcc.pclk4 = Some(mhz(100));
-    config
-}
-
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     let ch1 = PwmPin::new_ch1(p.PA6);
diff --git a/examples/stm32h7/src/bin/sdmmc.rs b/examples/stm32h7/src/bin/sdmmc.rs
index ec98bf14e..f44d88aca 100644
--- a/examples/stm32h7/src/bin/sdmmc.rs
+++ b/examples/stm32h7/src/bin/sdmmc.rs
@@ -9,15 +9,11 @@ use embassy_stm32::time::mhz;
 use embassy_stm32::{interrupt, Config};
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(200));
-    config
-}
-
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) -> ! {
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(200));
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     let irq = interrupt::take!(SDMMC1);
diff --git a/examples/stm32h7/src/bin/spi.rs b/examples/stm32h7/src/bin/spi.rs
index dc8cb7f47..8f6f14850 100644
--- a/examples/stm32h7/src/bin/spi.rs
+++ b/examples/stm32h7/src/bin/spi.rs
@@ -16,14 +16,6 @@ use embassy_util::Forever;
 use heapless::String;
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(400));
-    config.rcc.hclk = Some(mhz(200));
-    config.rcc.pll1.q_ck = Some(mhz(100));
-    config
-}
-
 #[embassy_executor::task]
 async fn main_task(mut spi: spi::Spi<'static, SPI3, NoDma, NoDma>) {
     for n in 0u32.. {
@@ -45,7 +37,11 @@ static EXECUTOR: Forever<Executor> = Forever::new();
 fn main() -> ! {
     info!("Hello World!");
 
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
+    let p = embassy_stm32::init(config);
 
     let spi = spi::Spi::new(
         p.SPI3,
diff --git a/examples/stm32h7/src/bin/spi_dma.rs b/examples/stm32h7/src/bin/spi_dma.rs
index 2631ed30c..d4c91a8e3 100644
--- a/examples/stm32h7/src/bin/spi_dma.rs
+++ b/examples/stm32h7/src/bin/spi_dma.rs
@@ -15,14 +15,6 @@ use embassy_util::Forever;
 use heapless::String;
 use {defmt_rtt as _, panic_probe as _};
 
-pub fn config() -> Config {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(400));
-    config.rcc.hclk = Some(mhz(200));
-    config.rcc.pll1.q_ck = Some(mhz(100));
-    config
-}
-
 #[embassy_executor::task]
 async fn main_task(mut spi: spi::Spi<'static, SPI3, DMA1_CH3, DMA1_CH4>) {
     for n in 0u32.. {
@@ -41,7 +33,11 @@ static EXECUTOR: Forever<Executor> = Forever::new();
 fn main() -> ! {
     info!("Hello World!");
 
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
+    let p = embassy_stm32::init(config);
 
     let spi = spi::Spi::new(
         p.SPI3,
diff --git a/examples/stm32l0/src/bin/button_exti.rs b/examples/stm32l0/src/bin/button_exti.rs
index ab23fd5bc..bdd2fa3c1 100644
--- a/examples/stm32l0/src/bin/button_exti.rs
+++ b/examples/stm32l0/src/bin/button_exti.rs
@@ -6,17 +6,15 @@ use defmt::*;
 use embassy_executor::executor::Spawner;
 use embassy_stm32::exti::ExtiInput;
 use embassy_stm32::gpio::{Input, Pull};
+use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> embassy_stm32::Config {
-    let mut config = embassy_stm32::Config::default();
-    config.rcc.enable_hsi48 = true;
-    config
-}
-
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.enable_hsi48 = true;
+    let p = embassy_stm32::init(config);
+
     let button = Input::new(p.PB2, Pull::Up);
     let mut button = ExtiInput::new(button, p.EXTI2);
 
diff --git a/examples/stm32l0/src/bin/lorawan.rs b/examples/stm32l0/src/bin/lorawan.rs
index 4e5b69362..9497cad72 100644
--- a/examples/stm32l0/src/bin/lorawan.rs
+++ b/examples/stm32l0/src/bin/lorawan.rs
@@ -18,16 +18,13 @@ use lorawan::default_crypto::DefaultFactory as Crypto;
 use lorawan_device::async_device::{region, Device, JoinMode};
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> embassy_stm32::Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
     config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSI16;
     config.rcc.enable_hsi48 = true;
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     // SPI for sx127x
     let spi = spi::Spi::new(
         p.SPI1,
diff --git a/examples/stm32l4/src/bin/rng.rs b/examples/stm32l4/src/bin/rng.rs
index d0e1306a3..c90515626 100644
--- a/examples/stm32l4/src/bin/rng.rs
+++ b/examples/stm32l4/src/bin/rng.rs
@@ -9,7 +9,8 @@ use embassy_stm32::rng::Rng;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     // 72Mhz clock (16 / 1 * 18 / 4)
     config.rcc.mux = ClockSrc::PLL(
@@ -19,12 +20,8 @@ fn config() -> Config {
         PLLMul::Mul18,
         Some(PLLClkDiv::Div6), // 48Mhz (16 / 1 * 18 / 6)
     );
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let mut rng = Rng::new(p.RNG);
diff --git a/examples/stm32l5/src/bin/rng.rs b/examples/stm32l5/src/bin/rng.rs
index b7919424a..cec9078e6 100644
--- a/examples/stm32l5/src/bin/rng.rs
+++ b/examples/stm32l5/src/bin/rng.rs
@@ -9,7 +9,8 @@ use embassy_stm32::rng::Rng;
 use embassy_stm32::Config;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     config.rcc.mux = ClockSrc::PLL(
         PLLSource::HSI16,
@@ -18,12 +19,8 @@ fn config() -> Config {
         PLLMul::Mul8,
         Some(PLLClkDiv::Div2),
     );
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let mut rng = Rng::new(p.RNG);
diff --git a/examples/stm32l5/src/bin/usb_ethernet.rs b/examples/stm32l5/src/bin/usb_ethernet.rs
index cc7578990..769b67a2b 100644
--- a/examples/stm32l5/src/bin/usb_ethernet.rs
+++ b/examples/stm32l5/src/bin/usb_ethernet.rs
@@ -83,19 +83,13 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
     stack.run().await
 }
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
     let mut config = Config::default();
-    config.rcc.mux = ClockSrc::HSE(Hertz(16_000_000));
-
     config.rcc.mux = ClockSrc::PLL(PLLSource::HSI16, PLLClkDiv::Div2, PLLSrcDiv::Div1, PLLMul::Mul10, None);
     config.rcc.hsi48 = true;
+    let p = embassy_stm32::init(config);
 
-    config
-}
-
-#[embassy_executor::main]
-async fn main(spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     // Create the driver, from the HAL.
     let irq = interrupt::take!(USB_FS);
     let driver = Driver::new(p.USB, irq, p.PA12, p.PA11);
diff --git a/examples/stm32l5/src/bin/usb_hid_mouse.rs b/examples/stm32l5/src/bin/usb_hid_mouse.rs
index b8eef6d0d..ef0a20a42 100644
--- a/examples/stm32l5/src/bin/usb_hid_mouse.rs
+++ b/examples/stm32l5/src/bin/usb_hid_mouse.rs
@@ -17,19 +17,13 @@ use futures::future::join;
 use usbd_hid::descriptor::{MouseReport, SerializedDescriptor};
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
-    config.rcc.mux = ClockSrc::HSE(Hertz(16_000_000));
-
     config.rcc.mux = ClockSrc::PLL(PLLSource::HSI16, PLLClkDiv::Div2, PLLSrcDiv::Div1, PLLMul::Mul10, None);
     config.rcc.hsi48 = true;
+    let p = embassy_stm32::init(config);
 
-    config
-}
-
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     // Create the driver, from the HAL.
     let irq = interrupt::take!(USB_FS);
     let driver = Driver::new(p.USB, irq, p.PA12, p.PA11);
diff --git a/examples/stm32l5/src/bin/usb_serial.rs b/examples/stm32l5/src/bin/usb_serial.rs
index f8894231c..a763a0b56 100644
--- a/examples/stm32l5/src/bin/usb_serial.rs
+++ b/examples/stm32l5/src/bin/usb_serial.rs
@@ -14,19 +14,13 @@ use embassy_usb_serial::{CdcAcmClass, State};
 use futures::future::join;
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = Config::default();
-    config.rcc.mux = ClockSrc::HSE(Hertz(16_000_000));
-
     config.rcc.mux = ClockSrc::PLL(PLLSource::HSI16, PLLClkDiv::Div2, PLLSrcDiv::Div1, PLLMul::Mul10, None);
     config.rcc.hsi48 = true;
+    let p = embassy_stm32::init(config);
 
-    config
-}
-
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     // Create the driver, from the HAL.
diff --git a/examples/stm32wl/src/bin/lorawan.rs b/examples/stm32wl/src/bin/lorawan.rs
index 35dae71a6..b6a3ca905 100644
--- a/examples/stm32wl/src/bin/lorawan.rs
+++ b/examples/stm32wl/src/bin/lorawan.rs
@@ -17,16 +17,13 @@ use lorawan::default_crypto::DefaultFactory as Crypto;
 use lorawan_device::async_device::{region, Device, JoinMode};
 use {defmt_rtt as _, panic_probe as _};
 
-fn config() -> embassy_stm32::Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
     config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSI16;
     config.rcc.enable_lsi = true;
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     unsafe { pac::RCC.ccipr().modify(|w| w.set_rngsel(0b01)) }
 
     let ctrl1 = Output::new(p.PC3.degrade(), Level::High, Speed::High);
diff --git a/examples/stm32wl/src/bin/subghz.rs b/examples/stm32wl/src/bin/subghz.rs
index 0e2d4103f..1b096514b 100644
--- a/examples/stm32wl/src/bin/subghz.rs
+++ b/examples/stm32wl/src/bin/subghz.rs
@@ -52,15 +52,12 @@ const TCXO_MODE: TcxoMode = TcxoMode::new()
 
 const TX_PARAMS: TxParams = TxParams::new().set_power(0x0D).set_ramp_time(RampTime::Micros40);
 
-fn config() -> embassy_stm32::Config {
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
     config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
-    config
-}
+    let p = embassy_stm32::init(config);
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     let mut led1 = Output::new(p.PB15, Level::High, Speed::Low);
     let mut led2 = Output::new(p.PB9, Level::Low, Speed::Low);
     let mut led3 = Output::new(p.PB11, Level::Low, Speed::Low);