Rename esp_hal::time::current_time to esp_hal::time::now (#2091)

* rename esp_hal::time::current_time to esp_hal::time::uptime

* changelog

* move more things to init

* s/uptime/now/g

esp-hal-embassy/src/time_driver.rs

@@ -5,7 +5,7 @@ use embassy_time_driver::{AlarmHandle, Driver};
 use esp_hal::{
     interrupt::{InterruptHandler, Priority},
     prelude::*,
-    time::current_time,
+    time::now,
     timer::{ErasedTimer, OneShotTimer},
 };
 
@@ -119,7 +119,7 @@ impl EmbassyTimer {
     }
 
     fn arm(timer: &mut Timer, timestamp: u64) {
-        let now = current_time().duration_since_epoch();
+        let now = now().duration_since_epoch();
         let ts = timestamp.micros();
         // if the TS is already in the past make the timer fire immediately
         let timeout = if ts > now { ts - now } else { 0.micros() };
@@ -130,7 +130,7 @@ impl EmbassyTimer {
 
 impl Driver for EmbassyTimer {
     fn now(&self) -> u64 {
-        current_time().ticks()
+        now().ticks()
     }
 
     unsafe fn allocate_alarm(&self) -> Option<AlarmHandle> {

esp-hal/CHANGELOG.md

@@ -22,6 +22,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Delay::new()` is now a `const` function (#1999)
 - You can now create an `AnyPin` out of an `ErasedPin`. (#2072)
 - `Input`, `Output`, `OutputOpenDrain` and `Flex` are now type-erased by default. Use the new `new_typed` constructor to keep using the ZST pin types. (#2075)
+- To avoid confusion with the `Rtc::current_time` wall clock time APIs, we've renamed `esp_hal::time::current_time` to `esp_hal::time::now`. (#2091)
 
 ### Fixed
 - SHA driver can now be safely used in multiple contexts concurrently (#2049)

esp-hal/MIGRATING-0.20.md

@@ -50,4 +50,12 @@ However, if you want to, you can keep using their typed form!
 ```rust
 let pin = Input::new(io.gpio0); // pin will have the type `Input<'some>` (or `Input<'some, ErasedPin>` if you want to be explicit about it)
 let pin = Input::new_typed(io.gpio0); // pin will have the type `Input<'some, GpioPin<0>>`
+
+## `esp_hal::time::current_time` rename
+
+To avoid confusion with the `Rtc::current_time` wall clock time APIs, we've renamed `esp_hal::time::current_time` to `esp_hal::time::now()`.
+
+```diff
+- use esp_hal::time::current_time;
++ use esp_hal::time::now;
 ```

esp-hal/src/delay.rs

@@ -3,7 +3,7 @@
 //! ## Overview
 //!
 //! The Delay driver provides blocking delay functionalities using the
-//! [current_time] function.
+//! [now] function.
 //!
 //! ## Configuration
 //!
@@ -31,7 +31,7 @@
 //! [DelayMs]: embedded_hal_02::blocking::delay::DelayMs
 //! [DelayUs]: embedded_hal_02::blocking::delay::DelayUs
 //! [embedded-hal]: https://docs.rs/embedded-hal/1.0.0/embedded_hal/delay/index.html
-//! [current_time]: crate::time::current_time
+//! [now]: crate::time::now
 
 pub use fugit::MicrosDurationU64;
 
@@ -75,7 +75,7 @@ impl Delay {
 
     /// Delay for the specified time
     pub fn delay(&self, delay: MicrosDurationU64) {
-        let start = crate::time::current_time();
+        let start = crate::time::now();
 
         while elapsed_since(start) < delay {}
     }
@@ -101,12 +101,12 @@ impl Delay {
 }
 
 fn elapsed_since(start: fugit::Instant<u64, 1, 1_000_000>) -> MicrosDurationU64 {
-    let now = crate::time::current_time();
+    let now = crate::time::now();
 
     if start.ticks() <= now.ticks() {
         now - start
     } else {
-        // current_time specifies at least 7 happy years, let's ignore this issue for
+        // now specifies at least 7 happy years, let's ignore this issue for
         // now.
         panic!("Time has wrapped around, which we currently don't handle");
     }

esp-hal/src/lib.rs

@@ -734,9 +734,26 @@ pub struct Config {
 ///
 /// This function sets up the CPU clock and returns the peripherals and clocks.
 pub fn init(config: Config) -> Peripherals {
-    let peripherals = Peripherals::take();
+    let mut peripherals = Peripherals::take();
 
     Clocks::init(config.cpu_clock);
 
+    #[cfg(xtensa)]
+    crate::interrupt::setup_interrupts();
+    #[cfg(esp32)]
+    crate::time::time_init();
+
+    // RTC domain must be enabled before we try to disable
+    let mut rtc = crate::rtc_cntl::Rtc::new(&mut peripherals.LPWR);
+    #[cfg(not(any(esp32, esp32s2)))]
+    rtc.swd.disable();
+    rtc.rwdt.disable();
+
+    unsafe {
+        crate::timer::timg::Wdt::<self::peripherals::TIMG0, Blocking>::set_wdt_enabled(false);
+        #[cfg(timg1)]
+        crate::timer::timg::Wdt::<self::peripherals::TIMG1, Blocking>::set_wdt_enabled(false);
+    }
+
     peripherals
 }

esp-hal/src/soc/esp32/mod.rs

@@ -7,11 +7,7 @@
 
 use core::ptr::addr_of_mut;
 
-use self::peripherals::{LPWR, TIMG0, TIMG1};
-use crate::{
-    rtc_cntl::{Rtc, SocResetReason},
-    timer::timg::Wdt,
-};
+use crate::rtc_cntl::SocResetReason;
 
 pub mod cpu_control;
 pub mod efuse;
@@ -111,9 +107,6 @@ pub unsafe extern "C" fn ESP32Reset() -> ! {
         stack_chk_guard.write_volatile(0xdeadbabe);
     }
 
-    crate::interrupt::setup_interrupts();
-    crate::time::time_init();
-
     // continue with default reset handler
     xtensa_lx_rt::Reset();
 }
@@ -126,13 +119,3 @@ pub unsafe extern "C" fn ESP32Reset() -> ! {
 pub extern "Rust" fn __init_data() -> bool {
     false
 }
-
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-    Wdt::<TIMG1, crate::Blocking>::set_wdt_enabled(false);
-}

esp-hal/src/soc/esp32c2/mod.rs

@@ -5,9 +5,6 @@
 //! The `SOC` module provides access, functions and structures that are useful
 //! for interacting with various system-related peripherals on `ESP32-C2` chip.
 
-use self::peripherals::{LPWR, TIMG0};
-use crate::{rtc_cntl::Rtc, timer::timg::Wdt};
-
 pub mod efuse;
 pub mod gpio;
 pub mod peripherals;
@@ -38,13 +35,3 @@ pub(crate) mod constants {
     /// RC FAST Clock value (Hertz).
     pub const RC_FAST_CLK: fugit::HertzU32 = fugit::HertzU32::kHz(17500);
 }
-
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.swd.disable();
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-}

esp-hal/src/soc/esp32c3/mod.rs

@@ -9,9 +9,6 @@
 //!    * I2S_SCLK: 160_000_000 - I2S clock frequency
 //!    * I2S_DEFAULT_CLK_SRC: 2 - I2S clock source
 
-use self::peripherals::{LPWR, TIMG0, TIMG1};
-use crate::{rtc_cntl::Rtc, timer::timg::Wdt};
-
 pub mod efuse;
 pub mod gpio;
 pub mod peripherals;
@@ -56,14 +53,3 @@ pub(crate) mod constants {
     /// RC FAST Clock value (Hertz).
     pub const RC_FAST_CLK: fugit::HertzU32 = fugit::HertzU32::kHz(17500);
 }
-
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.swd.disable();
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-    Wdt::<TIMG1, crate::Blocking>::set_wdt_enabled(false);
-}

esp-hal/src/soc/esp32c6/mod.rs

@@ -10,9 +10,6 @@
 //!    * I2S_DEFAULT_CLK_SRC: 2 - I2S clock source
 //!    * I2S_SCLK: 160_000_000 - I2S clock frequency
 
-use self::peripherals::{LPWR, TIMG0, TIMG1};
-use crate::{rtc_cntl::Rtc, timer::timg::Wdt};
-
 pub mod efuse;
 pub mod gpio;
 pub mod lp_core;
@@ -64,14 +61,3 @@ pub(crate) mod constants {
     /// RC FAST Clock value (Hertz).
     pub const RC_FAST_CLK: fugit::HertzU32 = fugit::HertzU32::kHz(17_500);
 }
-
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.swd.disable();
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-    Wdt::<TIMG1, crate::Blocking>::set_wdt_enabled(false);
-}

esp-hal/src/soc/esp32h2/mod.rs

@@ -10,9 +10,6 @@
 //!    * I2S_DEFAULT_CLK_SRC: 1 - I2S clock source
 //!    * I2S_SCLK: 96_000_000 - I2S clock frequency
 
-use self::peripherals::{LPWR, TIMG0, TIMG1};
-use crate::{rtc_cntl::Rtc, timer::timg::Wdt};
-
 pub mod efuse;
 pub mod gpio;
 pub mod peripherals;
@@ -64,14 +61,3 @@ pub(crate) mod constants {
     /// RC FAST Clock value (Hertz).
     pub const RC_FAST_CLK: fugit::HertzU32 = fugit::HertzU32::kHz(17500);
 }
-
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.swd.disable();
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-    Wdt::<TIMG1, crate::Blocking>::set_wdt_enabled(false);
-}

esp-hal/src/soc/esp32s2/mod.rs

@@ -11,11 +11,7 @@
 
 use core::ptr::addr_of_mut;
 
-use self::peripherals::{LPWR, TIMG0, TIMG1};
-use crate::{
-    rtc_cntl::{Rtc, SocResetReason},
-    timer::timg::Wdt,
-};
+use crate::rtc_cntl::SocResetReason;
 
 pub mod efuse;
 pub mod gpio;
@@ -116,8 +112,6 @@ pub unsafe extern "C" fn ESP32Reset() -> ! {
         stack_chk_guard.write_volatile(0xdeadbabe);
     }
 
-    crate::interrupt::setup_interrupts();
-
     // continue with default reset handler
     xtensa_lx_rt::Reset();
 }
@@ -130,13 +124,3 @@ pub unsafe extern "C" fn ESP32Reset() -> ! {
 pub extern "Rust" fn __init_data() -> bool {
     false
 }
-
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-    Wdt::<TIMG1, crate::Blocking>::set_wdt_enabled(false);
-}

esp-hal/src/soc/esp32s3/mod.rs

@@ -11,11 +11,7 @@
 
 use core::ptr::addr_of_mut;
 
-use self::peripherals::{LPWR, TIMG0, TIMG1};
-use crate::{
-    rtc_cntl::{Rtc, SocResetReason},
-    timer::timg::Wdt,
-};
+use crate::rtc_cntl::SocResetReason;
 
 pub mod cpu_control;
 pub mod efuse;
@@ -155,8 +151,6 @@ pub unsafe extern "C" fn ESP32Reset() -> ! {
         stack_chk_guard.write_volatile(0xdeadbabe);
     }
 
-    crate::interrupt::setup_interrupts();
-
     // continue with default reset handler
     xtensa_lx_rt::Reset();
 }
@@ -170,16 +164,6 @@ pub extern "Rust" fn __init_data() -> bool {
     false
 }
 
-#[export_name = "__post_init"]
-unsafe fn post_init() {
-    // RTC domain must be enabled before we try to disable
-    let mut rtc = Rtc::new(LPWR::steal());
-    rtc.rwdt.disable();
-
-    Wdt::<TIMG0, crate::Blocking>::set_wdt_enabled(false);
-    Wdt::<TIMG1, crate::Blocking>::set_wdt_enabled(false);
-}
-
 /// Write back a specific range of data in the cache.
 #[doc(hidden)]
 #[link_section = ".rwtext"]

esp-hal/src/time.rs

@@ -1,6 +1,6 @@
 //! # Time
 //!
-//! The `time` module offers a way to get the system uptime.
+//! The `time` module offers a way to get the system now.
 
 /// Provides time since system start in microseconds precision.
 ///
@@ -10,7 +10,7 @@
 #[cfg_attr(esp32, doc = "36_558 years")]
 #[cfg_attr(esp32s2, doc = "7_311 years")]
 #[cfg_attr(not(any(esp32, esp32s2)), doc = "more than 7 years")]
-pub fn current_time() -> fugit::Instant<u64, 1, 1_000_000> {
+pub fn now() -> fugit::Instant<u64, 1, 1_000_000> {
     #[cfg(esp32)]
     let (ticks, div) = {
         // on ESP32 use LACT
@@ -50,9 +50,10 @@ pub fn current_time() -> fugit::Instant<u64, 1, 1_000_000> {
 
 #[cfg(esp32)]
 pub(crate) fn time_init() {
+    let apb = crate::Clocks::get().apb_clock.to_Hz();
     // we assume 80MHz APB clock source - there is no way to configure it in a
     // different way currently
-    const APB_FREQUENCY: u32 = 80_000_000u32;
+    assert_eq!(apb, 80_000_000u32);
 
     let tg0 = unsafe { crate::peripherals::TIMG0::steal() };
 
@@ -63,7 +64,7 @@ pub(crate) fn time_init() {
 
     // 16 MHz counter
     tg0.lactconfig()
-        .modify(|_, w| unsafe { w.divider().bits((APB_FREQUENCY / 16_000_000u32) as u16) });
+        .modify(|_, w| unsafe { w.divider().bits((apb / 16_000_000u32) as u16) });
     tg0.lactconfig().modify(|_, w| {
         w.increase().bit(true);
         w.autoreload().bit(true);

esp-hal/src/timer/systimer.rs

@@ -148,7 +148,7 @@ impl<'d> SystemTimer<'d> {
 
     /// Create a new instance.
     pub fn new(_systimer: impl Peripheral<P = SYSTIMER> + 'd) -> Self {
-        // Don't reset Systimer as it will break `current_time`, only enable it
+        // Don't reset Systimer as it will break `time::now`, only enable it
         PeripheralClockControl::enable(PeripheralEnable::Systimer);
 
         #[cfg(soc_etm)]

esp-hal/src/timer/timg.rs

@@ -159,7 +159,7 @@ impl TimerGroupInstance for TIMG0 {
     }
 
     fn reset_peripheral() {
-        // for TIMG0 do nothing for now because the reset breaks `current_time`
+        // for TIMG0 do nothing for now because the reset breaks `time::now`
     }
 
     #[inline(always)]

esp-wifi/src/timer/riscv.rs

@@ -89,7 +89,7 @@ pub fn yield_task() {
 /// Current systimer count value
 /// A tick is 1 / 1_000_000 seconds
 pub fn get_systimer_count() -> u64 {
-    esp_hal::time::current_time().ticks()
+    esp_hal::time::now().ticks()
 }
 
 // TODO: use an Instance type instead...

esp-wifi/src/timer/xtensa.rs

@@ -20,7 +20,7 @@ pub const TICKS_PER_SECOND: u64 = 1_000_000;
 /// This function must not be called in a critical section. Doing so may return
 /// an incorrect value.
 pub fn get_systimer_count() -> u64 {
-    esp_hal::time::current_time().ticks()
+    esp_hal::time::now().ticks()
 }
 
 pub fn setup_timer(mut timer1: TimeBase) -> Result<(), esp_hal::timer::Error> {

examples/src/bin/timer_interrupt.rs

@@ -46,9 +46,7 @@ fn tg0_t0_level() {
     critical_section::with(|cs| {
         esp_println::println!(
             "Interrupt at {} ms",
-            esp_hal::time::current_time()
-                .duration_since_epoch()
-                .to_millis()
+            esp_hal::time::now().duration_since_epoch().to_millis()
         );
 
         let mut timer0 = TIMER0.borrow_ref_mut(cs);

hil-test/tests/delay.rs

@@ -29,9 +29,9 @@ mod tests {
     #[test]
     #[timeout(2)]
     fn delay_ns(mut ctx: Context) {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         ctx.delay.delay_ns(600_000_000);
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1);
         assert!(
@@ -44,9 +44,9 @@ mod tests {
     #[test]
     #[timeout(2)]
     fn delay_700millis(ctx: Context) {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         ctx.delay.delay_millis(700);
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1);
         assert!(
@@ -59,9 +59,9 @@ mod tests {
     #[test]
     #[timeout(2)]
     fn delay_1_500_000us(mut ctx: Context) {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         ctx.delay.delay_us(1_500_000);
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1);
         assert!(
@@ -74,9 +74,9 @@ mod tests {
     #[test]
     #[timeout(5)]
     fn delay_3_000ms(mut ctx: Context) {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         ctx.delay.delay_ms(3000);
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1);
         assert!(

hil-test/tests/embassy_timers_executors.rs

@@ -48,10 +48,10 @@ mod test_cases {
     use super::*;
 
     pub async fn run_test_one_shot_async() {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         Timer::after_millis(50).await;
         Timer::after_millis(30).await;
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1, "t2: {:?}, t1: {:?}", t2, t1);
         assert!(
@@ -64,11 +64,11 @@ mod test_cases {
     pub fn run_test_periodic_timer<T: esp_hal::timer::Timer>(timer: impl Peripheral<P = T>) {
         let mut periodic = PeriodicTimer::new(timer);
 
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         periodic.start(100.millis()).unwrap();
 
         nb::block!(periodic.wait()).unwrap();
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1, "t2: {:?}, t1: {:?}", t2, t1);
         assert!(
@@ -81,9 +81,9 @@ mod test_cases {
     pub fn run_test_oneshot_timer<T: esp_hal::timer::Timer>(timer: impl Peripheral<P = T>) {
         let timer = OneShotTimer::new(timer);
 
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         timer.delay_millis(50);
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1, "t2: {:?}, t1: {:?}", t2, t1);
         assert!(
@@ -94,10 +94,10 @@ mod test_cases {
     }
 
     pub async fn run_join_test() {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         embassy_futures::join::join(Timer::after_millis(50), Timer::after_millis(30)).await;
         Timer::after_millis(50).await;
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1, "t2: {:?}, t1: {:?}", t2, t1);
         assert!(
@@ -232,11 +232,11 @@ mod test {
             let outcome = async {
                 let mut ticker = Ticker::every(Duration::from_millis(30));
 
-                let t1 = esp_hal::time::current_time();
+                let t1 = esp_hal::time::now();
                 ticker.next().await;
                 ticker.next().await;
                 ticker.next().await;
-                let t2 = esp_hal::time::current_time();
+                let t2 = esp_hal::time::now();
 
                 assert!(t2 > t1, "t2: {:?}, t1: {:?}", t2, t1);
                 assert!(
@@ -268,13 +268,13 @@ mod test {
         // We are retrying 5 times because probe-rs polling RTT may introduce some
         // jitter.
         for _ in 0..5 {
-            let t1 = esp_hal::time::current_time();
+            let t1 = esp_hal::time::now();
 
             let mut ticker = Ticker::every(Duration::from_hz(100_000));
             for _ in 0..2000 {
                 ticker.next().await;
             }
-            let t2 = esp_hal::time::current_time();
+            let t2 = esp_hal::time::now();
 
             assert!(t2 > t1, "t2: {:?}, t1: {:?}", t2, t1);
             let duration = (t2 - t1).to_micros();

hil-test/tests/get_time.rs

@@ -1,4 +1,4 @@
-//! current_time Test
+//! time::now Test
 
 //% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
 
@@ -13,9 +13,9 @@ struct Context {
 }
 
 fn time_moves_forward_during<F: FnOnce(Context)>(ctx: Context, f: F) {
-    let t1 = esp_hal::time::current_time();
+    let t1 = esp_hal::time::now();
     f(ctx);
-    let t2 = esp_hal::time::current_time();
+    let t2 = esp_hal::time::now();
 
     assert!(t2 > t1);
 }
@@ -37,9 +37,9 @@ mod tests {
     #[test]
     #[timeout(3)]
     fn test_current_time(ctx: Context) {
-        let t1 = esp_hal::time::current_time();
+        let t1 = esp_hal::time::now();
         ctx.delay.delay_millis(500);
-        let t2 = esp_hal::time::current_time();
+        let t2 = esp_hal::time::now();
 
         assert!(t2 > t1);
         assert!((t2 - t1).to_millis() >= 500u64);