embassy-stm32: Simplify time

- Remove unused `MilliSeconds`, `MicroSeconds`, and `NanoSeconds` types
- Remove `Bps`, `KiloHertz`, and `MegaHertz` types that were only used
for converting to `Hertz`
- Replace all instances of `impl Into<Hertz>` with `Hertz`
- Add `hz`, `khz`, and `mhz` methods to `Hertz`, as well as
free function shortcuts
- Remove `U32Ext` extension trait

examples/stm32h7/src/bin/adc.rs

@@ -7,15 +7,15 @@ use embassy::executor::Spawner;
 use embassy::time::{Delay, Duration, Timer};
 use embassy_stm32::adc::{Adc, SampleTime};
 use embassy_stm32::rcc::AdcClockSource;
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::mhz;
 use embassy_stm32::{Config, Peripherals};
 use {defmt_rtt as _, panic_probe as _};
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(200.mhz().into());
-    config.rcc.per_ck = Some(64.mhz().into());
+    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
 }

examples/stm32h7/src/bin/camera.rs

@@ -8,20 +8,20 @@ use embassy_stm32::dcmi::{self, *};
 use embassy_stm32::gpio::{Level, Output, Speed};
 use embassy_stm32::i2c::I2c;
 use embassy_stm32::rcc::{Mco, Mco1Source, McoClock};
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::{khz, mhz};
 use embassy_stm32::{interrupt, Config, Peripherals};
 use {defmt_rtt as _, panic_probe as _};
 
 #[allow(unused)]
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(400.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
-    config.rcc.pclk1 = Some(100.mhz().into());
-    config.rcc.pclk2 = Some(100.mhz().into());
-    config.rcc.pclk3 = Some(100.mhz().into());
-    config.rcc.pclk4 = Some(100.mhz().into());
+    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
 }
 
@@ -39,7 +39,7 @@ async fn main(_spawner: Spawner, p: Peripherals) {
 
     let mut led = Output::new(p.PE3, Level::High, Speed::Low);
     let i2c_irq = interrupt::take!(I2C1_EV);
-    let cam_i2c = I2c::new(p.I2C1, p.PB8, p.PB9, i2c_irq, p.DMA1_CH1, p.DMA1_CH2, 100u32.khz());
+    let cam_i2c = I2c::new(p.I2C1, p.PB8, p.PB9, i2c_irq, p.DMA1_CH1, p.DMA1_CH2, khz(100));
 
     let mut camera = Ov7725::new(cam_i2c, mco);
 

examples/stm32h7/src/bin/dac.rs

@@ -5,15 +5,15 @@
 use cortex_m_rt::entry;
 use defmt::*;
 use embassy_stm32::dac::{Channel, Dac, Value};
-use embassy_stm32::time::U32Ext;
+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(400.mhz().into());
-    config.rcc.hclk = Some(200.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
     config
 }
 

examples/stm32h7/src/bin/eth.rs

@@ -12,7 +12,7 @@ use embassy_stm32::eth::generic_smi::GenericSMI;
 use embassy_stm32::eth::{Ethernet, State};
 use embassy_stm32::peripherals::ETH;
 use embassy_stm32::rng::Rng;
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::mhz;
 use embassy_stm32::{interrupt, Config, Peripherals};
 use embedded_io::asynch::Write;
 use rand_core::RngCore;
@@ -35,9 +35,9 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(200.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
     config
 }
 

examples/stm32h7/src/bin/fmc.rs

@@ -6,15 +6,15 @@ use defmt::*;
 use embassy::executor::Spawner;
 use embassy::time::{Delay, Duration, Timer};
 use embassy_stm32::fmc::Fmc;
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::mhz;
 use embassy_stm32::{Config, Peripherals};
 use {defmt_rtt as _, panic_probe as _};
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(200.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
     config
 }
 

examples/stm32h7/src/bin/low_level_timer_api.rs

@@ -10,19 +10,19 @@ use embassy::time::{Duration, Timer};
 use embassy_stm32::gpio::low_level::AFType;
 use embassy_stm32::gpio::Speed;
 use embassy_stm32::pwm::*;
-use embassy_stm32::time::{Hertz, U32Ext};
+use embassy_stm32::time::{khz, mhz, Hertz};
 use embassy_stm32::{unborrow, Config, Peripherals, Unborrow};
 use {defmt_rtt as _, panic_probe as _};
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(400.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
-    config.rcc.pclk1 = Some(100.mhz().into());
-    config.rcc.pclk2 = Some(100.mhz().into());
-    config.rcc.pclk3 = Some(100.mhz().into());
-    config.rcc.pclk4 = Some(100.mhz().into());
+    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
 }
 
@@ -30,7 +30,7 @@ pub fn config() -> Config {
 async fn main(_spawner: Spawner, p: Peripherals) {
     info!("Hello World!");
 
-    let mut pwm = SimplePwm32::new(p.TIM5, p.PA0, p.PA1, p.PA2, p.PA3, 10000.hz());
+    let mut pwm = SimplePwm32::new(p.TIM5, p.PA0, p.PA1, p.PA2, p.PA3, khz(10));
     let max = pwm.get_max_duty();
     pwm.enable(Channel::Ch1);
 
@@ -54,13 +54,13 @@ pub struct SimplePwm32<'d, T: CaptureCompare32bitInstance> {
 }
 
 impl<'d, T: CaptureCompare32bitInstance> SimplePwm32<'d, T> {
-    pub fn new<F: Into<Hertz>>(
+    pub fn new(
         tim: impl Unborrow<Target = T> + 'd,
         ch1: impl Unborrow<Target = impl Channel1Pin<T>> + 'd,
         ch2: impl Unborrow<Target = impl Channel2Pin<T>> + 'd,
         ch3: impl Unborrow<Target = impl Channel3Pin<T>> + 'd,
         ch4: impl Unborrow<Target = impl Channel4Pin<T>> + 'd,
-        freq: F,
+        freq: Hertz,
     ) -> Self {
         unborrow!(tim, ch1, ch2, ch3, ch4);
 
@@ -115,7 +115,7 @@ impl<'d, T: CaptureCompare32bitInstance> SimplePwm32<'d, T> {
         }
     }
 
-    pub fn set_freq<F: Into<Hertz>>(&mut self, freq: F) {
+    pub fn set_freq(&mut self, freq: Hertz) {
         <T as embassy_stm32::timer::low_level::GeneralPurpose32bitInstance>::set_frequency(&mut self.inner, freq);
     }
 

examples/stm32h7/src/bin/pwm.rs

@@ -7,19 +7,19 @@ use embassy::executor::Spawner;
 use embassy::time::{Duration, Timer};
 use embassy_stm32::pwm::simple_pwm::SimplePwm;
 use embassy_stm32::pwm::Channel;
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::{khz, mhz};
 use embassy_stm32::{Config, Peripherals};
 use {defmt_rtt as _, panic_probe as _};
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(400.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
-    config.rcc.pclk1 = Some(100.mhz().into());
-    config.rcc.pclk2 = Some(100.mhz().into());
-    config.rcc.pclk3 = Some(100.mhz().into());
-    config.rcc.pclk4 = Some(100.mhz().into());
+    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
 }
 
@@ -27,7 +27,7 @@ pub fn config() -> Config {
 async fn main(_spawner: Spawner, p: Peripherals) {
     info!("Hello World!");
 
-    let mut pwm = SimplePwm::new_1ch(p.TIM3, p.PA6, 10000.hz());
+    let mut pwm = SimplePwm::new_1ch(p.TIM3, p.PA6, khz(10));
     let max = pwm.get_max_duty();
     pwm.enable(Channel::Ch1);
 

examples/stm32h7/src/bin/sdmmc.rs

@@ -5,13 +5,13 @@
 use defmt::*;
 use embassy::executor::Spawner;
 use embassy_stm32::sdmmc::Sdmmc;
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::mhz;
 use embassy_stm32::{interrupt, Config, Peripherals};
 use {defmt_rtt as _, panic_probe as _};
 
 fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(200.mhz().into());
+    config.rcc.sys_ck = Some(mhz(200));
     config
 }
 
@@ -31,7 +31,7 @@ async fn main(_spawner: Spawner, p: Peripherals) -> ! {
     // Should print 400kHz for initialization
     info!("Configured clock: {}", sdmmc.clock().0);
 
-    unwrap!(sdmmc.init_card(25.mhz()).await);
+    unwrap!(sdmmc.init_card(mhz(25)).await);
 
     let card = unwrap!(sdmmc.card());
 

examples/stm32h7/src/bin/spi.rs

@@ -11,16 +11,16 @@ use embassy::executor::Executor;
 use embassy::util::Forever;
 use embassy_stm32::dma::NoDma;
 use embassy_stm32::peripherals::SPI3;
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::mhz;
 use embassy_stm32::{spi, Config};
 use heapless::String;
 use {defmt_rtt as _, panic_probe as _};
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(200.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
     config
 }
 
@@ -54,7 +54,7 @@ fn main() -> ! {
         p.PB4,
         NoDma,
         NoDma,
-        1.mhz(),
+        mhz(1),
         spi::Config::default(),
     );
 

examples/stm32h7/src/bin/spi_dma.rs

@@ -10,16 +10,16 @@ use defmt::*;
 use embassy::executor::Executor;
 use embassy::util::Forever;
 use embassy_stm32::peripherals::{DMA1_CH3, DMA1_CH4, SPI3};
-use embassy_stm32::time::U32Ext;
+use embassy_stm32::time::mhz;
 use embassy_stm32::{spi, Config};
 use heapless::String;
 use {defmt_rtt as _, panic_probe as _};
 
 pub fn config() -> Config {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(400.mhz().into());
-    config.rcc.hclk = Some(200.mhz().into());
-    config.rcc.pll1.q_ck = Some(100.mhz().into());
+    config.rcc.sys_ck = Some(mhz(400));
+    config.rcc.hclk = Some(mhz(200));
+    config.rcc.pll1.q_ck = Some(mhz(100));
     config
 }
 
@@ -50,7 +50,7 @@ fn main() -> ! {
         p.PB4,
         p.DMA1_CH3,
         p.DMA1_CH4,
-        1.mhz(),
+        mhz(1),
         spi::Config::default(),
     );