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/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
-}
-
-#[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.

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.

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
-}
-
-#[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);

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,