timers rework

Author: burrbull

Cargo.toml

@@ -25,7 +25,9 @@ bxcan = "0.6"
 void = { default-features = false, version = "1.0.2" }
 embedded-hal = { features = ["unproven"], version = "0.2.6" }
 fugit = "0.3.5"
+fugit-timer = "0.1.3"
 rtic-monotonic = { version = "1.0", optional = true }
+bitflags = "1.3.2"
 
 [dependencies.stm32-usbd]
 version = "0.6.0"

examples/blinky.rs

@@ -39,7 +39,8 @@ fn main() -> ! {
     // in order to configure the port. For pins 0-7, crl should be passed instead.
     let mut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);
     // Configure the syst timer to trigger an update every second
-    let mut timer = Timer::syst(cp.SYST, &clocks).start_count_down(1.Hz());
+    let mut timer = Timer::syst(cp.SYST, &clocks).counter_hz();
+    timer.start(1.Hz()).unwrap();
 
     // Wait for the timer to trigger an update and change the state of the LED
     loop {

examples/blinky_generic.rs

@@ -26,7 +26,8 @@ fn main() -> ! {
     let mut gpioc = dp.GPIOC.split();
 
     // Configure the syst timer to trigger an update every second
-    let mut timer = Timer::syst(cp.SYST, &clocks).start_count_down(1.Hz());
+    let mut timer = Timer::syst(cp.SYST, &clocks).counter_hz();
+    timer.start(1.Hz()).unwrap();
 
     // Create an array of LEDS to blink
     let mut leds = [

examples/blinky_timer_irq.rs

@@ -18,7 +18,7 @@ use crate::hal::{
     gpio::{gpioc, Output, PushPull},
     pac::{interrupt, Interrupt, Peripherals, TIM2},
     prelude::*,
-    timer::{CountDownTimer, Event, Timer},
+    timer::{CounterMs, Event},
 };
 
 use core::cell::RefCell;
@@ -38,14 +38,14 @@ type LedPin = gpioc::PC13<Output<PushPull>>;
 static G_LED: Mutex<RefCell<Option<LedPin>>> = Mutex::new(RefCell::new(None));
 
 // Make timer interrupt registers globally available
-static G_TIM: Mutex<RefCell<Option<CountDownTimer<TIM2>>>> = Mutex::new(RefCell::new(None));
+static G_TIM: Mutex<RefCell<Option<CounterMs<TIM2>>>> = Mutex::new(RefCell::new(None));
 
 // Define an interupt handler, i.e. function to call when interrupt occurs.
 // This specific interrupt will "trip" when the timer TIM2 times out
 #[interrupt]
 fn TIM2() {
     static mut LED: Option<LedPin> = None;
-    static mut TIM: Option<CountDownTimer<TIM2>> = None;
+    static mut TIM: Option<CounterMs<TIM2>> = None;
 
     let led = LED.get_or_insert_with(|| {
         cortex_m::interrupt::free(|cs| {
@@ -86,7 +86,8 @@ fn main() -> ! {
     cortex_m::interrupt::free(|cs| *G_LED.borrow(cs).borrow_mut() = Some(led));
 
     // Set up a timer expiring after 1s
-    let mut timer = Timer::new(dp.TIM2, &clocks).start_count_down(1.Hz());
+    let mut timer = dp.TIM2.counter_ms(&clocks);
+    timer.start(1.secs()).unwrap();
 
     // Generate an interrupt when the timer expires
     timer.listen(Event::Update);

examples/delay-timer-blinky.rs

@@ -0,0 +1,53 @@
+//! Demonstrate the use of a blocking `Delay` using TIM2 general-purpose timer.
+
+#![deny(unsafe_code)]
+#![allow(clippy::empty_loop)]
+#![no_main]
+#![no_std]
+
+// Halt on panic
+use panic_halt as _; // panic handler
+
+use cortex_m_rt::entry;
+use stm32f1xx_hal as hal;
+
+use crate::hal::{pac, prelude::*};
+
+#[entry]
+fn main() -> ! {
+    if let (Some(dp), Some(_cp)) = (
+        pac::Peripherals::take(),
+        cortex_m::peripheral::Peripherals::take(),
+    ) {
+        let mut flash = dp.FLASH.constrain();
+        // Set up the LED. On the BluePill it's connected to pin PC13.
+        let mut gpioc = dp.GPIOC.split();
+        let mut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);
+
+        // Set up the system clock. We want to run at 48MHz for this one.
+        let rcc = dp.RCC.constrain();
+        let clocks = rcc
+            .cfgr
+            .use_hse(8.MHz())
+            .sysclk(48.MHz())
+            .freeze(&mut flash.acr);
+
+        // Create a delay abstraction based on general-pupose 32-bit timer TIM2
+
+        //let mut delay = hal::timer::FTimerUs::new(dp.TIM2, &clocks).delay();
+        // or
+        let mut delay = dp.TIM2.delay_us(&clocks);
+
+        loop {
+            // On for 1s, off for 3s.
+            led.set_high();
+            // Use `embedded_hal::DelayMs` trait
+            delay.delay_ms(1000_u32);
+            led.set_low();
+            // or use `fugit` duration units
+            delay.delay(3.secs());
+        }
+    }
+
+    loop {}
+}

examples/delay.rs

@@ -7,7 +7,7 @@
 use panic_halt as _;
 
 use cortex_m_rt::entry;
-use stm32f1xx_hal::{delay::Delay, pac, prelude::*};
+use stm32f1xx_hal::{pac, prelude::*};
 
 #[entry]
 fn main() -> ! {
@@ -30,12 +30,16 @@ fn main() -> ! {
     #[cfg(any(feature = "stm32f103", feature = "stm32f105", feature = "stm32f107"))]
     let mut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);
 
-    let mut delay = Delay::new(cp.SYST, &clocks);
+    //let mut delay = hal::timer::Timer::syst(cp.SYST, &clocks).delay();
+    // or
+    let mut delay = cp.SYST.delay(&clocks);
 
     loop {
         led.set_high();
+        // Use `embedded_hal::DelayMs` trait
         delay.delay_ms(1_000_u16);
         led.set_low();
-        delay.delay_ms(1_000_u16);
+        // or use `fugit` duration units
+        delay.delay(1.secs());
     }
 }

examples/dynamic_gpio.rs

@@ -9,7 +9,7 @@ use nb::block;
 use cortex_m_rt::entry;
 use cortex_m_semihosting::hprintln;
 use embedded_hal::digital::v2::{InputPin, OutputPin};
-use stm32f1xx_hal::{pac, prelude::*, timer::Timer};
+use stm32f1xx_hal::{pac, prelude::*};
 
 #[entry]
 fn main() -> ! {
@@ -32,7 +32,8 @@ fn main() -> ! {
 
     let mut pin = gpioc.pc13.into_dynamic(&mut gpioc.crh);
     // Configure the syst timer to trigger an update every second
-    let mut timer = Timer::syst(cp.SYST, &clocks).start_count_down(1.Hz());
+    let mut timer = cp.SYST.counter_hz(&clocks);
+    timer.start(1.Hz()).unwrap();
 
     // Wait for the timer to trigger an update and change the state of the LED
     loop {

examples/gpio_input.rs

@@ -17,7 +17,7 @@
 #![no_main]
 use cortex_m_rt::entry;
 use panic_halt as _;
-use stm32f1xx_hal::{delay::Delay, gpio::PinState, pac, prelude::*};
+use stm32f1xx_hal::{gpio::PinState, pac, prelude::*};
 
 #[entry]
 fn main() -> ! {
@@ -53,7 +53,7 @@ fn main() -> ! {
     // The key_up for check buttons if long press.
     // if key_up is true, and buttons were not long press.
     let mut key_up: bool = true;
-    let mut delay = Delay::new(cp.SYST, &clock);
+    let mut delay = cp.SYST.delay(&clock);
     loop {
         let key_result = (key_0.is_low(), key_1.is_low());
         if key_up && (key_result.0 || key_result.1) {

examples/multi_mode_gpio.rs

@@ -31,7 +31,8 @@ fn main() -> ! {
 
     let mut pin = gpioc.pc13.into_floating_input(&mut gpioc.crh);
     // Configure the syst timer to trigger an update every second
-    let mut timer = Timer::syst(cp.SYST, &clocks).start_count_down(1.Hz());
+    let mut timer = Timer::syst(cp.SYST, &clocks).counter_hz();
+    timer.start(1.Hz()).unwrap();
 
     // Wait for the timer to trigger an update and change the state of the LED
     loop {

examples/pwm.rs

@@ -12,9 +12,8 @@ use cortex_m_rt::entry;
 use stm32f1xx_hal::{
     pac,
     prelude::*,
-    pwm::Channel,
     time::ms,
-    timer::{Tim2NoRemap, Timer},
+    timer::{Channel, Tim2NoRemap},
 };
 
 #[entry]
@@ -51,8 +50,12 @@ fn main() -> ! {
     // let c3 = gpiob.pb8.into_alternate_push_pull(&mut gpiob.crh);
     // let c4 = gpiob.pb9.into_alternate_push_pull(&mut gpiob.crh);
 
-    let mut pwm =
-        Timer::new(p.TIM2, &clocks).pwm::<Tim2NoRemap, _, _>(pins, &mut afio.mapr, 1.kHz());
+    //let mut pwm =
+    //    Timer::new(p.TIM2, &clocks).pwm_hz::<Tim2NoRemap, _, _>(pins, &mut afio.mapr, 1.kHz());
+    // or
+    let mut pwm = p
+        .TIM2
+        .pwm_hz::<Tim2NoRemap, _, _>(pins, &mut afio.mapr, 1.kHz(), &clocks);
 
     // Enable clock on each of the channels
     pwm.enable(Channel::C1);