Merge pull request #1949 from xoviat/rtc

stm32/rtc: cleanup and fixes

embassy-stm32/Cargo.toml

@@ -59,7 +59,7 @@ sdio-host = "0.5.0"
 embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
 critical-section = "1.1"
 atomic-polyfill = "1.0.1"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-74025d56c0ba061703f360558ce80f51d1165060" }
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-1551a1c01a993bb5ffc603311f80097c14e03f85" }
 vcell = "0.1.3"
 bxcan = "0.7.0"
 nb = "1.0.0"
@@ -78,7 +78,7 @@ critical-section = { version = "1.1", features = ["std"] }
 [build-dependencies]
 proc-macro2 = "1.0.36"
 quote = "1.0.15"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-74025d56c0ba061703f360558ce80f51d1165060", default-features = false, features = ["metadata"]}
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-1551a1c01a993bb5ffc603311f80097c14e03f85", default-features = false, features = ["metadata"]}
 
 [features]
 default = ["rt"]

embassy-stm32/src/rcc/bd.rs

@@ -88,11 +88,6 @@ impl BackupDomain {
     ))]
     #[allow(dead_code, unused_variables)]
     pub fn configure_ls(clock_source: RtcClockSource, lsi: bool, lse: Option<LseDrive>) {
-        if lsi || lse.is_some() {
-            use crate::rtc::sealed::Instance;
-            crate::peripherals::RTC::enable_peripheral_clk();
-        }
-
         if lsi {
             #[cfg(rtc_v3u5)]
             let csr = crate::pac::RCC.bdcr();

embassy-stm32/src/rtc/mod.rs

@@ -111,11 +111,12 @@ impl RtcTimeProvider {
     }
 }
 
-#[non_exhaustive]
 /// RTC Abstraction
 pub struct Rtc {
     #[cfg(feature = "low-power")]
     stop_time: Mutex<CriticalSectionRawMutex, Cell<Option<RtcInstant>>>,
+    #[cfg(not(feature = "low-power"))]
+    _private: (),
 }
 
 #[non_exhaustive]
@@ -154,9 +155,14 @@ impl Default for RtcCalibrationCyclePeriod {
 
 impl Rtc {
     pub fn new(_rtc: impl Peripheral<P = RTC>, rtc_config: RtcConfig) -> Self {
+        #[cfg(any(rcc_wle, rcc_wl5, rcc_g4, rcc_g0, rtc_v2l4, rtc_v2wb))]
+        <RTC as crate::rcc::sealed::RccPeripheral>::enable();
+
         let mut this = Self {
             #[cfg(feature = "low-power")]
             stop_time: Mutex::const_new(CriticalSectionRawMutex::new(), Cell::new(None)),
+            #[cfg(not(feature = "low-power"))]
+            _private: (),
         };
 
         let frequency = Self::frequency();
@@ -292,8 +298,6 @@ pub(crate) mod sealed {
             crate::pac::RTC
         }
 
-        fn enable_peripheral_clk();
-
         /// Read content of the backup register.
         ///
         /// The registers retain their values during wakes from standby mode or system resets. They also

embassy-stm32/src/rtc/v2.rs

@@ -75,15 +75,6 @@ impl super::Rtc {
         #[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
         unsafe { crate::rcc::get_freqs() }.rtc.unwrap();
 
-        /*
-            If the requested duration is u64::MAX, don't even set the alarm
-
-            Otherwise clamp the requested duration to u32::MAX so that we can do math
-        */
-        if requested_duration.as_ticks() == u64::MAX {
-            return;
-        }
-
         let requested_duration = requested_duration.as_ticks().clamp(0, u32::MAX as u64);
         let rtc_hz = Self::frequency().0 as u64;
         let rtc_ticks = requested_duration * rtc_hz / TICK_HZ;
@@ -286,17 +277,6 @@ impl sealed::Instance for crate::peripherals::RTC {
     #[cfg(all(feature = "low-power", stm32l0))]
     type WakeupInterrupt = crate::interrupt::typelevel::RTC;
 
-    fn enable_peripheral_clk() {
-        #[cfg(any(rtc_v2l4, rtc_v2wb))]
-        {
-            // enable peripheral clock for communication
-            crate::pac::RCC.apb1enr1().modify(|w| w.set_rtcapben(true));
-
-            // read to allow the pwr clock to enable
-            crate::pac::PWR.cr1().read();
-        }
-    }
-
     fn read_backup_register(rtc: &Rtc, register: usize) -> Option<u32> {
         if register < Self::BACKUP_REGISTER_COUNT {
             Some(rtc.bkpr(register).read().bkp())

embassy-stm32/src/rtc/v3.rs

@@ -128,23 +128,6 @@ impl super::Rtc {
 impl sealed::Instance for crate::peripherals::RTC {
     const BACKUP_REGISTER_COUNT: usize = 32;
 
-    fn enable_peripheral_clk() {
-        #[cfg(any(rcc_wle, rcc_wl5, rcc_g4))]
-        {
-            // enable peripheral clock for communication
-            crate::pac::RCC.apb1enr1().modify(|w| w.set_rtcapben(true));
-        }
-
-        #[cfg(rcc_g0)]
-        {
-            // enable peripheral clock for communication
-            crate::pac::RCC.apbenr1().modify(|w| w.set_rtcapben(true));
-        }
-
-        // read to allow the pwr clock to enable
-        crate::pac::PWR.cr1().read();
-    }
-
     fn read_backup_register(_rtc: &Rtc, register: usize) -> Option<u32> {
         #[allow(clippy::if_same_then_else)]
         if register < Self::BACKUP_REGISTER_COUNT {