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.

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 {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(Hertz(36_000_000));
-    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(Hertz(36_000_000));
+    let _p = embassy_stm32::init(config);
+
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;

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!");
 
     {

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
+#[embassy_executor::main]
-fn config() -> Config {
+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]
+    let _p = embassy_stm32::init(config);
-async fn main(_spawner: Spawner) {
+
-    let _p = embassy_stm32::init(config());
     loop {
         Timer::after(Duration::from_millis(1000)).await;
         info!("1s elapsed");

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;

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

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 {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(Hertz(84_000_000));
-    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(Hertz(84_000_000));
+    let _p = embassy_stm32::init(config);
+
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;

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);

examples/stm32f7/src/bin/eth.rs

@@ -33,15 +33,12 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
     stack.run().await
 }
 
-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!");
 
     // Generate random seed.

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 {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(Hertz(84_000_000));
-    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(Hertz(84_000_000));
+    let _p = embassy_stm32::init(config);
+
     loop {
         info!("Hello World!");
         Timer::after(Duration::from_secs(1)).await;

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 {
-    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);

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);

examples/stm32h7/src/bin/camera.rs

@@ -10,22 +10,8 @@ use embassy_stm32::i2c::I2c;
 use embassy_stm32::rcc::{Mco, Mco1Source, McoClock};
 use embassy_stm32::time::{khz, mhz};
 use embassy_stm32::{interrupt, Config};
-use {defmt_rtt as _, panic_probe as _};
-
-#[allow(unused)]
-pub fn config() -> Config {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(400));
-    config.rcc.hclk = Some(mhz(400));
-    config.rcc.pll1.q_ck = Some(mhz(100));
-    config.rcc.pclk1 = Some(mhz(100));
-    config.rcc.pclk2 = Some(mhz(100));
-    config.rcc.pclk3 = Some(mhz(100));
-    config.rcc.pclk4 = Some(mhz(100));
-    config
-}
-
 use ov7725::*;
+use {defmt_rtt as _, panic_probe as _};
 
 const WIDTH: usize = 100;
 const HEIGHT: usize = 100;
@@ -34,7 +20,16 @@ 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());
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(400));
+    config.rcc.pll1.q_ck = Some(mhz(100));
+    config.rcc.pclk1 = Some(mhz(100));
+    config.rcc.pclk2 = Some(mhz(100));
+    config.rcc.pclk3 = Some(mhz(100));
+    config.rcc.pclk4 = Some(mhz(100));
+    let p = embassy_stm32::init(config);
+
     defmt::info!("Hello World!");
     let mco = Mco::new(p.MCO1, p.PA8, Mco1Source::Hsi, McoClock::Divided(3));
 

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);
 

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
+    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.

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
+    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.

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();

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));

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
+    let p = embassy_stm32::init(config);
-}
-
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
     info!("Hello World!");
 
     let ch1 = PwmPin::new_ch1(p.PA6);

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);

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,

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,

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);
 

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,

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);

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);

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 {
-    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;
-
-    config
-}
-
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.mux = ClockSrc::PLL(PLLSource::HSI16, PLLClkDiv::Div2, PLLSrcDiv::Div1, PLLMul::Mul10, None);
+    config.rcc.hsi48 = true;
+    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);

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 {
-    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;
-
-    config
-}
-
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.mux = ClockSrc::PLL(PLLSource::HSI16, PLLClkDiv::Div2, PLLSrcDiv::Div1, PLLMul::Mul10, None);
+    config.rcc.hsi48 = true;
+    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);

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 {
-    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;
-
-    config
-}
-
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = Config::default();
+    config.rcc.mux = ClockSrc::PLL(PLLSource::HSI16, PLLClkDiv::Div2, PLLSrcDiv::Div1, PLLMul::Mul10, None);
+    config.rcc.hsi48 = true;
+    let p = embassy_stm32::init(config);
+
     info!("Hello World!");
 
     // Create the driver, from the HAL.

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);

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 {
-    let mut config = embassy_stm32::Config::default();
-    config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
-    config
-}
-
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_stm32::init(config());
+    let mut config = embassy_stm32::Config::default();
+    config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
+    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);