Merge pull request #49 from thalesfragoso/st-timer

Add STM timer

embassy-stm32f4-examples/.cargo/config

@@ -1,5 +1,5 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
-runner = "probe-run --chip STM32F411CEUx --defmt"
+runner = "probe-run --chip STM32F401CCUx --defmt"
 
 rustflags = [
   # LLD (shipped with the Rust toolchain) is used as the default linker

embassy-stm32f4-examples/Cargo.toml

@@ -18,7 +18,7 @@ defmt-error = []
 
 [dependencies]
 embassy = { version = "0.1.0", path = "../embassy", features = ["defmt", "defmt-trace"] }
-embassy-stm32f4 = { version = "*", path = "../embassy-stm32f4", features = ["stm32f405"] }
+embassy-stm32f4 = { version = "*", path = "../embassy-stm32f4", features = ["stm32f401"] }
 
 defmt = "0.1.3"
 defmt-rtt = "0.1.0"
@@ -27,6 +27,6 @@ cortex-m = "0.7.1"
 cortex-m-rt = "0.6.13"
 embedded-hal    = { version = "0.2.4" }
 panic-probe = "0.1.0"
-stm32f4xx-hal  = { version = "0.8.3", features = ["rt", "stm32f405"], git = "https://github.com/stm32-rs/stm32f4xx-hal.git"}
+stm32f4xx-hal  = { version = "0.8.3", features = ["rt", "stm32f401"], git = "https://github.com/stm32-rs/stm32f4xx-hal.git"}
 futures = { version = "0.3.8", default-features = false, features = ["async-await"] }
 rtt-target = { version = "0.3", features = ["cortex-m"] }

embassy-stm32f4-examples/memory.x

@@ -1,5 +1,5 @@
 MEMORY
 {
-  FLASH : ORIGIN = 0x08000000, LENGTH = 64K 
+  FLASH : ORIGIN = 0x08000000, LENGTH = 64K
   RAM : ORIGIN = 0x20000000, LENGTH = 32K
 }

embassy-stm32f4-examples/src/bin/rtc_async.rs

@@ -0,0 +1,65 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use example_common::*;
+
+use cortex_m_rt::entry;
+use defmt::panic;
+use embassy::executor::{task, Executor};
+use embassy::time::{Duration, Timer};
+use embassy::util::Forever;
+use embassy_stm32f4::{interrupt, pac, rtc};
+use stm32f4xx_hal::prelude::*;
+
+#[task]
+async fn run1() {
+    loop {
+        info!("BIG INFREQUENT TICK");
+        Timer::after(Duration::from_ticks(32768 * 2)).await;
+    }
+}
+
+#[task]
+async fn run2() {
+    loop {
+        info!("tick");
+        Timer::after(Duration::from_ticks(13000)).await;
+    }
+}
+
+static RTC: Forever<rtc::RTC<pac::TIM2>> = Forever::new();
+static ALARM: Forever<rtc::Alarm<pac::TIM2>> = Forever::new();
+static EXECUTOR: Forever<Executor> = Forever::new();
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    let p = unwrap!(pac::Peripherals::take());
+
+    p.RCC.ahb1enr.modify(|_, w| w.dma1en().enabled());
+    let rcc = p.RCC.constrain();
+    let clocks = rcc.cfgr.freeze();
+
+    p.DBGMCU.cr.modify(|_, w| {
+        w.dbg_sleep().set_bit();
+        w.dbg_standby().set_bit();
+        w.dbg_stop().set_bit()
+    });
+
+    let rtc = RTC.put(rtc::RTC::new(p.TIM2, interrupt::take!(TIM2), clocks));
+    rtc.start();
+
+    unsafe { embassy::time::set_clock(rtc) };
+
+    let alarm = ALARM.put(rtc.alarm1());
+    let executor = EXECUTOR.put(Executor::new());
+    executor.set_alarm(alarm);
+    executor.run(|spawner| {
+        unwrap!(spawner.spawn(run1()));
+        unwrap!(spawner.spawn(run2()));
+    });
+}