diff --git a/ci.sh b/ci.sh
index ffd36a45..eac4d371 100755
--- a/ci.sh
+++ b/ci.sh
@@ -221,8 +221,8 @@ rm out/tests/stm32wb55rg/wpan_ble
 # unstable, I think it's running out of RAM?
 rm out/tests/stm32f207zg/eth
 
-# doesn't work. Wire in D0-D1 might be bad, or the special IOVDD2 PGx pins.
-rm out/tests/stm32u5a5zj/{gpio,usart*}
+# doesn't work, gives "noise error", no idea why. usart_dma does pass.
+rm out/tests/stm32u5a5zj/usart
 
 if [[ -z "${TELEPROBE_TOKEN-}" ]]; then
     echo No teleprobe token found, skipping running HIL tests
diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index 568a7eeb..99288340 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -58,7 +58,7 @@ rand_core = "0.6.3"
 sdio-host = "0.5.0"
 embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
 critical-section = "1.1"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-4ddcb77c9d213d11eebb048f40e112bc54163cdc" }
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-bcc9b6bf9fa195e91625849efc4ba473d9ace4e9" }
 vcell = "0.1.3"
 bxcan = "0.7.0"
 nb = "1.0.0"
@@ -76,7 +76,7 @@ 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-4ddcb77c9d213d11eebb048f40e112bc54163cdc", default-features = false, features = ["metadata"]}
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-bcc9b6bf9fa195e91625849efc4ba473d9ace4e9", default-features = false, features = ["metadata"]}
 
 
 [features]
diff --git a/embassy-stm32/src/gpio.rs b/embassy-stm32/src/gpio.rs
index e1702b00..011f4c07 100644
--- a/embassy-stm32/src/gpio.rs
+++ b/embassy-stm32/src/gpio.rs
@@ -763,6 +763,13 @@ pub(crate) unsafe fn init(_cs: CriticalSection) {
     <crate::peripherals::AFIO as crate::rcc::sealed::RccPeripheral>::enable_and_reset_with_cs(_cs);
 
     crate::_generated::init_gpio();
+
+    // Setting this bit is mandatory to use PG[15:2].
+    #[cfg(stm32u5)]
+    crate::pac::PWR.svmcr().modify(|w| {
+        w.set_io2sv(true);
+        w.set_io2vmen(true);
+    });
 }
 
 mod eh02 {
diff --git a/embassy-stm32/src/rcc/f4f7.rs b/embassy-stm32/src/rcc/f4f7.rs
index 3f9a2be6..2e4f9572 100644
--- a/embassy-stm32/src/rcc/f4f7.rs
+++ b/embassy-stm32/src/rcc/f4f7.rs
@@ -166,8 +166,8 @@ pub(crate) unsafe fn init(config: Config) {
     };
 
     let hclk = sys / config.ahb_pre;
-    let (pclk1, pclk1_tim) = calc_pclk(hclk, config.apb1_pre);
-    let (pclk2, pclk2_tim) = calc_pclk(hclk, config.apb2_pre);
+    let (pclk1, pclk1_tim) = super::util::calc_pclk(hclk, config.apb1_pre);
+    let (pclk2, pclk2_tim) = super::util::calc_pclk(hclk, config.apb2_pre);
 
     assert!(max::SYSCLK.contains(&sys));
     assert!(max::HCLK.contains(&hclk));
@@ -326,15 +326,6 @@ fn flash_setup(clk: Hertz) {
     while FLASH.acr().read().latency() != latency {}
 }
 
-fn calc_pclk<D>(hclk: Hertz, ppre: D) -> (Hertz, Hertz)
-where
-    Hertz: core::ops::Div<D, Output = Hertz>,
-{
-    let pclk = hclk / ppre;
-    let pclk_tim = if hclk == pclk { pclk } else { pclk * 2u32 };
-    (pclk, pclk_tim)
-}
-
 #[cfg(stm32f7)]
 mod max {
     use core::ops::RangeInclusive;
diff --git a/embassy-stm32/src/rcc/h.rs b/embassy-stm32/src/rcc/h.rs
index 8883763e..7e924f0a 100644
--- a/embassy-stm32/src/rcc/h.rs
+++ b/embassy-stm32/src/rcc/h.rs
@@ -6,8 +6,11 @@ use crate::pac::pwr::vals::Vos;
 pub use crate::pac::rcc::vals::Adcdacsel as AdcClockSource;
 #[cfg(stm32h7)]
 pub use crate::pac::rcc::vals::Adcsel as AdcClockSource;
-use crate::pac::rcc::vals::{Ckpersel, Hsidiv, Pllrge, Pllsrc, Pllvcosel, Sw, Timpre};
-pub use crate::pac::rcc::vals::{Ckpersel as PerClockSource, Plldiv as PllDiv, Pllm as PllPreDiv, Plln as PllMul};
+pub use crate::pac::rcc::vals::{
+    Ckpersel as PerClockSource, Hsidiv as HSIPrescaler, Plldiv as PllDiv, Pllm as PllPreDiv, Plln as PllMul,
+    Pllsrc as PllSource, Sw as Sysclk,
+};
+use crate::pac::rcc::vals::{Ckpersel, Pllrge, Pllvcosel, Timpre};
 use crate::pac::{FLASH, PWR, RCC};
 use crate::rcc::{set_freqs, Clocks};
 use crate::time::Hertz;
@@ -58,41 +61,9 @@ pub struct Hse {
     pub mode: HseMode,
 }
 
-#[derive(Clone, Copy, Eq, PartialEq)]
-pub enum Hsi {
-    /// 64Mhz
-    Mhz64,
-    /// 32Mhz (divided by 2)
-    Mhz32,
-    /// 16Mhz (divided by 4)
-    Mhz16,
-    /// 8Mhz (divided by 8)
-    Mhz8,
-}
-
-#[derive(Clone, Copy, Eq, PartialEq)]
-pub enum Sysclk {
-    /// HSI selected as sysclk
-    HSI,
-    /// HSE selected as sysclk
-    HSE,
-    /// CSI selected as sysclk
-    CSI,
-    /// PLL1_P selected as sysclk
-    Pll1P,
-}
-
-#[derive(Clone, Copy, Eq, PartialEq)]
-pub enum PllSource {
-    Hsi,
-    Csi,
-    Hse,
-}
-
 #[derive(Clone, Copy)]
 pub struct Pll {
     /// Source clock selection.
-    #[cfg(stm32h5)]
     pub source: PllSource,
 
     /// PLL pre-divider (DIVM).
@@ -152,15 +123,12 @@ impl From<TimerPrescaler> for Timpre {
 /// Configuration of the core clocks
 #[non_exhaustive]
 pub struct Config {
-    pub hsi: Option<Hsi>,
+    pub hsi: Option<HSIPrescaler>,
     pub hse: Option<Hse>,
     pub csi: bool,
     pub hsi48: bool,
     pub sys: Sysclk,
 
-    #[cfg(stm32h7)]
-    pub pll_src: PllSource,
-
     pub pll1: Option<Pll>,
     pub pll2: Option<Pll>,
     #[cfg(any(rcc_h5, stm32h7))]
@@ -184,13 +152,11 @@ pub struct Config {
 impl Default for Config {
     fn default() -> Self {
         Self {
-            hsi: Some(Hsi::Mhz64),
+            hsi: Some(HSIPrescaler::DIV1),
             hse: None,
             csi: false,
             hsi48: false,
             sys: Sysclk::HSI,
-            #[cfg(stm32h7)]
-            pll_src: PllSource::Hsi,
             pll1: None,
             pll2: None,
             #[cfg(any(rcc_h5, stm32h7))]
@@ -303,19 +269,13 @@ pub(crate) unsafe fn init(config: Config) {
             RCC.cr().modify(|w| w.set_hsion(false));
             None
         }
-        Some(hsi) => {
-            let (freq, hsidiv) = match hsi {
-                Hsi::Mhz64 => (HSI_FREQ / 1u32, Hsidiv::DIV1),
-                Hsi::Mhz32 => (HSI_FREQ / 2u32, Hsidiv::DIV2),
-                Hsi::Mhz16 => (HSI_FREQ / 4u32, Hsidiv::DIV4),
-                Hsi::Mhz8 => (HSI_FREQ / 8u32, Hsidiv::DIV8),
-            };
+        Some(hsidiv) => {
             RCC.cr().modify(|w| {
                 w.set_hsidiv(hsidiv);
                 w.set_hsion(true);
             });
             while !RCC.cr().read().hsirdy() {}
-            Some(freq)
+            Some(HSI_FREQ / hsidiv)
         }
     };
 
@@ -360,25 +320,29 @@ pub(crate) unsafe fn init(config: Config) {
         }
     };
 
+    // H7 has shared PLLSRC, check it's equal in all PLLs.
+    #[cfg(stm32h7)]
+    {
+        let plls = [&config.pll1, &config.pll2, &config.pll3];
+        if !super::util::all_equal(plls.into_iter().flatten().map(|p| p.source)) {
+            panic!("Source must be equal across all enabled PLLs.")
+        };
+    }
+
     // Configure PLLs.
-    let pll_input = PllInput {
-        csi,
-        hse,
-        hsi,
-        #[cfg(stm32h7)]
-        source: config.pll_src,
-    };
+    let pll_input = PllInput { csi, hse, hsi };
     let pll1 = init_pll(0, config.pll1, &pll_input);
     let pll2 = init_pll(1, config.pll2, &pll_input);
     #[cfg(any(rcc_h5, stm32h7))]
     let pll3 = init_pll(2, config.pll3, &pll_input);
 
     // Configure sysclk
-    let (sys, sw) = match config.sys {
-        Sysclk::HSI => (unwrap!(hsi), Sw::HSI),
-        Sysclk::HSE => (unwrap!(hse), Sw::HSE),
-        Sysclk::CSI => (unwrap!(csi), Sw::CSI),
-        Sysclk::Pll1P => (unwrap!(pll1.p), Sw::PLL1_P),
+    let sys = match config.sys {
+        Sysclk::HSI => unwrap!(hsi),
+        Sysclk::HSE => unwrap!(hse),
+        Sysclk::CSI => unwrap!(csi),
+        Sysclk::PLL1_P => unwrap!(pll1.p),
+        _ => unreachable!(),
     };
 
     // Check limits.
@@ -502,8 +466,8 @@ pub(crate) unsafe fn init(config: Config) {
 
     RCC.cfgr().modify(|w| w.set_timpre(config.timer_prescaler.into()));
 
-    RCC.cfgr().modify(|w| w.set_sw(sw));
-    while RCC.cfgr().read().sws() != sw {}
+    RCC.cfgr().modify(|w| w.set_sw(config.sys));
+    while RCC.cfgr().read().sws() != config.sys {}
 
     // IO compensation cell - Requires CSI clock and SYSCFG
     #[cfg(stm32h7)] // TODO h5
@@ -588,8 +552,6 @@ struct PllInput {
     hsi: Option<Hertz>,
     hse: Option<Hertz>,
     csi: Option<Hertz>,
-    #[cfg(stm32h7)]
-    source: PllSource,
 }
 
 struct PllOutput {
@@ -619,15 +581,11 @@ fn init_pll(num: usize, config: Option<Pll>, input: &PllInput) -> PllOutput {
         };
     };
 
-    #[cfg(stm32h5)]
-    let source = config.source;
-    #[cfg(stm32h7)]
-    let source = input.source;
-
-    let (in_clk, src) = match source {
-        PllSource::Hsi => (unwrap!(input.hsi), Pllsrc::HSI),
-        PllSource::Hse => (unwrap!(input.hse), Pllsrc::HSE),
-        PllSource::Csi => (unwrap!(input.csi), Pllsrc::CSI),
+    let in_clk = match config.source {
+        PllSource::DISABLE => panic!("must not set PllSource::Disable"),
+        PllSource::HSI => unwrap!(input.hsi),
+        PllSource::HSE => unwrap!(input.hse),
+        PllSource::CSI => unwrap!(input.csi),
     };
 
     let ref_clk = in_clk / config.prediv as u32;
@@ -667,7 +625,7 @@ fn init_pll(num: usize, config: Option<Pll>, input: &PllInput) -> PllOutput {
 
     #[cfg(stm32h5)]
     RCC.pllcfgr(num).write(|w| {
-        w.set_pllsrc(src);
+        w.set_pllsrc(config.source);
         w.set_divm(config.prediv);
         w.set_pllvcosel(vco_range);
         w.set_pllrge(ref_range);
@@ -681,7 +639,7 @@ fn init_pll(num: usize, config: Option<Pll>, input: &PllInput) -> PllOutput {
     {
         RCC.pllckselr().modify(|w| {
             w.set_divm(num, config.prediv);
-            w.set_pllsrc(src);
+            w.set_pllsrc(config.source);
         });
         RCC.pllcfgr().modify(|w| {
             w.set_pllvcosel(num, vco_range);
diff --git a/embassy-stm32/src/rcc/l0l1.rs b/embassy-stm32/src/rcc/l0l1.rs
index 52e9ccb3..9fb2062d 100644
--- a/embassy-stm32/src/rcc/l0l1.rs
+++ b/embassy-stm32/src/rcc/l0l1.rs
@@ -156,23 +156,9 @@ pub(crate) unsafe fn init(config: Config) {
         w.set_ppre2(config.apb2_pre);
     });
 
-    let ahb_freq = sys_clk / config.ahb_pre;
-
-    let (apb1_freq, apb1_tim_freq) = match config.apb1_pre {
-        APBPrescaler::DIV1 => (ahb_freq, ahb_freq),
-        pre => {
-            let freq = ahb_freq / pre;
-            (freq, freq * 2u32)
-        }
-    };
-
-    let (apb2_freq, apb2_tim_freq) = match config.apb2_pre {
-        APBPrescaler::DIV1 => (ahb_freq, ahb_freq),
-        pre => {
-            let freq = ahb_freq / pre;
-            (freq, freq * 2u32)
-        }
-    };
+    let hclk1 = sys_clk / config.ahb_pre;
+    let (pclk1, pclk1_tim) = super::util::calc_pclk(hclk1, config.apb1_pre);
+    let (pclk2, pclk2_tim) = super::util::calc_pclk(hclk1, config.apb2_pre);
 
     #[cfg(crs)]
     if config.enable_hsi48 {
@@ -209,11 +195,11 @@ pub(crate) unsafe fn init(config: Config) {
 
     set_freqs(Clocks {
         sys: sys_clk,
-        hclk1: ahb_freq,
-        pclk1: apb1_freq,
-        pclk2: apb2_freq,
-        pclk1_tim: apb1_tim_freq,
-        pclk2_tim: apb2_tim_freq,
+        hclk1,
+        pclk1,
+        pclk2,
+        pclk1_tim,
+        pclk2_tim,
         rtc,
     });
 }
diff --git a/embassy-stm32/src/rcc/l4l5.rs b/embassy-stm32/src/rcc/l4l5.rs
index b5696227..2f89f682 100644
--- a/embassy-stm32/src/rcc/l4l5.rs
+++ b/embassy-stm32/src/rcc/l4l5.rs
@@ -1,7 +1,8 @@
 use crate::pac::rcc::regs::Cfgr;
-#[cfg(not(stm32wl))]
+#[cfg(any(stm32l4, stm32l5, stm32wb))]
 pub use crate::pac::rcc::vals::Clk48sel as Clk48Src;
-use crate::pac::rcc::vals::Msirgsel;
+#[cfg(any(stm32wb, stm32wl))]
+pub use crate::pac::rcc::vals::Hsepre as HsePrescaler;
 pub use crate::pac::rcc::vals::{
     Hpre as AHBPrescaler, Msirange as MSIRange, Pllm as PllPreDiv, Plln as PllMul, Pllp as PllPDiv, Pllq as PllQDiv,
     Pllr as PllRDiv, Pllsrc as PLLSource, Ppre as APBPrescaler, Sw as ClockSrc,
@@ -27,6 +28,9 @@ pub struct Hse {
     pub freq: Hertz,
     /// HSE mode.
     pub mode: HseMode,
+    /// HSE prescaler
+    #[cfg(any(stm32wb, stm32wl))]
+    pub prescaler: HsePrescaler,
 }
 
 #[derive(Clone, Copy)]
@@ -54,12 +58,12 @@ pub struct Config {
     pub msi: Option<MSIRange>,
     pub hsi: bool,
     pub hse: Option<Hse>,
-    #[cfg(any(all(stm32l4, not(any(stm32l47x, stm32l48x))), stm32l5))]
+    #[cfg(any(all(stm32l4, not(any(stm32l47x, stm32l48x))), stm32l5, stm32wb))]
     pub hsi48: bool,
 
     // pll
     pub pll: Option<Pll>,
-    #[cfg(any(stm32l4, stm32l5))]
+    #[cfg(any(stm32l4, stm32l5, stm32wb))]
     pub pllsai1: Option<Pll>,
     #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
     pub pllsai2: Option<Pll>,
@@ -69,11 +73,13 @@ pub struct Config {
     pub ahb_pre: AHBPrescaler,
     pub apb1_pre: APBPrescaler,
     pub apb2_pre: APBPrescaler,
-    #[cfg(stm32wl)]
+    #[cfg(any(stm32wl5x, stm32wb))]
+    pub core2_ahb_pre: AHBPrescaler,
+    #[cfg(any(stm32wl, stm32wb))]
     pub shared_ahb_pre: AHBPrescaler,
 
     // muxes
-    #[cfg(not(stm32wl))]
+    #[cfg(any(stm32l4, stm32l5, stm32wb))]
     pub clk48_src: Clk48Src,
 
     // low speed LSI/LSE/RTC
@@ -91,28 +97,63 @@ impl Default for Config {
             ahb_pre: AHBPrescaler::DIV1,
             apb1_pre: APBPrescaler::DIV1,
             apb2_pre: APBPrescaler::DIV1,
-            #[cfg(stm32wl)]
+            #[cfg(any(stm32wl5x, stm32wb))]
+            core2_ahb_pre: AHBPrescaler::DIV1,
+            #[cfg(any(stm32wl, stm32wb))]
             shared_ahb_pre: AHBPrescaler::DIV1,
             pll: None,
-            #[cfg(any(stm32l4, stm32l5))]
+            #[cfg(any(stm32l4, stm32l5, stm32wb))]
             pllsai1: None,
             #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
             pllsai2: None,
-            #[cfg(any(all(stm32l4, not(any(stm32l47x, stm32l48x))), stm32l5))]
+            #[cfg(any(all(stm32l4, not(any(stm32l47x, stm32l48x))), stm32l5, stm32wb))]
             hsi48: true,
-            #[cfg(not(stm32wl))]
+            #[cfg(any(stm32l4, stm32l5, stm32wb))]
             clk48_src: Clk48Src::HSI48,
             ls: Default::default(),
         }
     }
 }
 
+#[cfg(stm32wb)]
+pub const WPAN_DEFAULT: Config = Config {
+    hse: Some(Hse {
+        freq: Hertz(32_000_000),
+        mode: HseMode::Oscillator,
+        prescaler: HsePrescaler::DIV1,
+    }),
+    mux: ClockSrc::PLL1_R,
+    hsi48: true,
+    msi: None,
+    hsi: false,
+    clk48_src: Clk48Src::PLL1_Q,
+
+    ls: super::LsConfig::default_lse(),
+
+    pll: Some(Pll {
+        source: PLLSource::HSE,
+        prediv: PllPreDiv::DIV2,
+        mul: PllMul::MUL12,
+        divp: Some(PllPDiv::DIV3), // 32 / 2 * 12 / 3 = 64Mhz
+        divq: Some(PllQDiv::DIV4), // 32 / 2 * 12 / 4 = 48Mhz
+        divr: Some(PllRDiv::DIV3), // 32 / 2 * 12 / 3 = 64Mhz
+    }),
+    pllsai1: None,
+
+    ahb_pre: AHBPrescaler::DIV1,
+    core2_ahb_pre: AHBPrescaler::DIV2,
+    shared_ahb_pre: AHBPrescaler::DIV1,
+    apb1_pre: APBPrescaler::DIV1,
+    apb2_pre: APBPrescaler::DIV1,
+};
+
 pub(crate) unsafe fn init(config: Config) {
     // Switch to MSI to prevent problems with PLL configuration.
     if !RCC.cr().read().msion() {
         // Turn on MSI and configure it to 4MHz.
         RCC.cr().modify(|w| {
-            w.set_msirgsel(Msirgsel::CR);
+            #[cfg(not(stm32wb))]
+            w.set_msirgsel(crate::pac::rcc::vals::Msirgsel::CR);
             w.set_msirange(MSIRange::RANGE4M);
             w.set_msipllen(false);
             w.set_msion(true)
@@ -138,8 +179,9 @@ pub(crate) unsafe fn init(config: Config) {
     let msi = config.msi.map(|range| {
         // Enable MSI
         RCC.cr().modify(|w| {
+            #[cfg(not(stm32wb))]
+            w.set_msirgsel(crate::pac::rcc::vals::Msirgsel::CR);
             w.set_msirange(range);
-            w.set_msirgsel(Msirgsel::CR);
             w.set_msion(true);
 
             // If LSE is enabled, enable calibration of MSI
@@ -173,7 +215,7 @@ pub(crate) unsafe fn init(config: Config) {
         hse.freq
     });
 
-    #[cfg(any(all(stm32l4, not(any(stm32l47x, stm32l48x))), stm32l5))]
+    #[cfg(any(all(stm32l4, not(any(stm32l47x, stm32l48x))), stm32l5, stm32wb))]
     let hsi48 = config.hsi48.then(|| {
         RCC.crrcr().modify(|w| w.set_hsi48on(true));
         while !RCC.crrcr().read().hsi48rdy() {}
@@ -185,7 +227,7 @@ pub(crate) unsafe fn init(config: Config) {
 
     let _plls = [
         &config.pll,
-        #[cfg(any(stm32l4, stm32l5))]
+        #[cfg(any(stm32l4, stm32l5, stm32wb))]
         &config.pllsai1,
         #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
         &config.pllsai2,
@@ -193,7 +235,7 @@ pub(crate) unsafe fn init(config: Config) {
 
     // L4 has shared PLLSRC, PLLM, check it's equal in all PLLs.
     #[cfg(all(stm32l4, not(rcc_l4plus)))]
-    match get_equal(_plls.into_iter().flatten().map(|p| (p.source, p.prediv))) {
+    match super::util::get_equal(_plls.into_iter().flatten().map(|p| (p.source, p.prediv))) {
         Err(()) => panic!("Source must be equal across all enabled PLLs."),
         Ok(None) => {}
         Ok(Some((source, prediv))) => RCC.pllcfgr().write(|w| {
@@ -204,7 +246,7 @@ pub(crate) unsafe fn init(config: Config) {
 
     // L4+, WL has shared PLLSRC, check it's equal in all PLLs.
     #[cfg(any(rcc_l4plus, stm32wl))]
-    match get_equal(_plls.into_iter().flatten().map(|p| p.source)) {
+    match super::util::get_equal(_plls.into_iter().flatten().map(|p| p.source)) {
         Err(()) => panic!("Source must be equal across all enabled PLLs."),
         Ok(None) => {}
         Ok(Some(source)) => RCC.pllcfgr().write(|w| {
@@ -214,7 +256,7 @@ pub(crate) unsafe fn init(config: Config) {
 
     let pll_input = PllInput { hse, hsi, msi };
     let pll = init_pll(PllInstance::Pll, config.pll, &pll_input);
-    #[cfg(any(stm32l4, stm32l5))]
+    #[cfg(any(stm32l4, stm32l5, stm32wb))]
     let pllsai1 = init_pll(PllInstance::Pllsai1, config.pllsai1, &pll_input);
     #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
     let _pllsai2 = init_pll(PllInstance::Pllsai2, config.pllsai2, &pll_input);
@@ -223,19 +265,19 @@ pub(crate) unsafe fn init(config: Config) {
         ClockSrc::HSE => hse.unwrap(),
         ClockSrc::HSI => hsi.unwrap(),
         ClockSrc::MSI => msi.unwrap(),
-        ClockSrc::PLL1_R => pll._r.unwrap(),
+        ClockSrc::PLL1_R => pll.r.unwrap(),
     };
 
     #[cfg(stm32l4)]
     RCC.ccipr().modify(|w| w.set_clk48sel(config.clk48_src));
     #[cfg(stm32l5)]
     RCC.ccipr1().modify(|w| w.set_clk48sel(config.clk48_src));
-    #[cfg(not(stm32wl))]
+    #[cfg(any(stm32l4, stm32l5, stm32wb))]
     let _clk48 = match config.clk48_src {
         Clk48Src::HSI48 => hsi48,
         Clk48Src::MSI => msi,
-        Clk48Src::PLLSAI1_Q => pllsai1._q,
-        Clk48Src::PLL1_Q => pll._q,
+        Clk48Src::PLLSAI1_Q => pllsai1.q,
+        Clk48Src::PLL1_Q => pll.q,
     };
 
     #[cfg(rcc_l4plus)]
@@ -243,30 +285,21 @@ pub(crate) unsafe fn init(config: Config) {
     #[cfg(all(stm32l4, not(rcc_l4plus)))]
     assert!(sys_clk.0 <= 80_000_000);
 
-    let ahb_freq = sys_clk / config.ahb_pre;
-
-    let (apb1_freq, apb1_tim_freq) = match config.apb1_pre {
-        APBPrescaler::DIV1 => (ahb_freq, ahb_freq),
-        pre => {
-            let freq = ahb_freq / pre;
-            (freq, freq * 2u32)
-        }
-    };
-
-    let (apb2_freq, apb2_tim_freq) = match config.apb2_pre {
-        APBPrescaler::DIV1 => (ahb_freq, ahb_freq),
-        pre => {
-            let freq = ahb_freq / pre;
-            (freq, freq * 2u32)
-        }
-    };
-
-    #[cfg(stm32wl)]
-    let ahb3_freq = sys_clk / config.shared_ahb_pre;
+    let hclk1 = sys_clk / config.ahb_pre;
+    let (pclk1, pclk1_tim) = super::util::calc_pclk(hclk1, config.apb1_pre);
+    let (pclk2, pclk2_tim) = super::util::calc_pclk(hclk1, config.apb2_pre);
+    #[cfg(not(any(stm32wl5x, stm32wb)))]
+    let hclk2 = hclk1;
+    #[cfg(any(stm32wl5x, stm32wb))]
+    let hclk2 = sys_clk / config.core2_ahb_pre;
+    #[cfg(not(any(stm32wl, stm32wb)))]
+    let hclk3 = hclk1;
+    #[cfg(any(stm32wl, stm32wb))]
+    let hclk3 = sys_clk / config.shared_ahb_pre;
 
     // Set flash wait states
     #[cfg(stm32l4)]
-    let latency = match sys_clk.0 {
+    let latency = match hclk1.0 {
         0..=16_000_000 => 0,
         0..=32_000_000 => 1,
         0..=48_000_000 => 2,
@@ -274,7 +307,7 @@ pub(crate) unsafe fn init(config: Config) {
         _ => 4,
     };
     #[cfg(stm32l5)]
-    let latency = match sys_clk.0 {
+    let latency = match hclk1.0 {
         // VCORE Range 0 (performance), others TODO
         0..=20_000_000 => 0,
         0..=40_000_000 => 1,
@@ -284,12 +317,21 @@ pub(crate) unsafe fn init(config: Config) {
         _ => 5,
     };
     #[cfg(stm32wl)]
-    let latency = match ahb3_freq.0 {
+    let latency = match hclk3.0 {
         // VOS RANGE1, others TODO.
         ..=18_000_000 => 0,
         ..=36_000_000 => 1,
         _ => 2,
     };
+    #[cfg(stm32wb)]
+    let latency = match hclk3.0 {
+        // VOS RANGE1, others TODO.
+        ..=18_000_000 => 0,
+        ..=36_000_000 => 1,
+        ..=54_000_000 => 2,
+        ..=64_000_000 => 3,
+        _ => 4,
+    };
 
     FLASH.acr().modify(|w| w.set_latency(latency));
     while FLASH.acr().read().latency() != latency {}
@@ -302,28 +344,29 @@ pub(crate) unsafe fn init(config: Config) {
     });
     while RCC.cfgr().read().sws() != config.mux {}
 
-    #[cfg(stm32wl)]
+    #[cfg(any(stm32wl, stm32wb))]
     {
         RCC.extcfgr().modify(|w| {
             w.set_shdhpre(config.shared_ahb_pre);
+            #[cfg(any(stm32wl5x, stm32wb))]
+            w.set_c2hpre(config.core2_ahb_pre);
         });
         while !RCC.extcfgr().read().shdhpref() {}
+        #[cfg(any(stm32wl5x, stm32wb))]
+        while !RCC.extcfgr().read().c2hpref() {}
     }
 
     set_freqs(Clocks {
         sys: sys_clk,
-        hclk1: ahb_freq,
-        hclk2: ahb_freq,
-        #[cfg(not(stm32wl))]
-        hclk3: ahb_freq,
-        pclk1: apb1_freq,
-        pclk2: apb2_freq,
-        pclk1_tim: apb1_tim_freq,
-        pclk2_tim: apb2_tim_freq,
+        hclk1,
+        hclk2,
+        hclk3,
+        pclk1,
+        pclk2,
+        pclk1_tim,
+        pclk2_tim,
         #[cfg(stm32wl)]
-        hclk3: ahb3_freq,
-        #[cfg(stm32wl)]
-        pclk3: ahb3_freq,
+        pclk3: hclk3,
         #[cfg(rcc_l4)]
         hsi: None,
         #[cfg(rcc_l4)]
@@ -362,60 +405,56 @@ fn msirange_to_hertz(range: MSIRange) -> Hertz {
     }
 }
 
-#[allow(unused)]
-fn get_equal<T: Eq>(mut iter: impl Iterator<Item = T>) -> Result<Option<T>, ()> {
-    let Some(x) = iter.next() else { return Ok(None) };
-    if !iter.all(|y| y == x) {
-        return Err(());
-    }
-    return Ok(Some(x));
-}
-
 struct PllInput {
     hsi: Option<Hertz>,
     hse: Option<Hertz>,
     msi: Option<Hertz>,
 }
 
+#[allow(unused)]
 #[derive(Default)]
 struct PllOutput {
-    _p: Option<Hertz>,
-    _q: Option<Hertz>,
-    _r: Option<Hertz>,
+    p: Option<Hertz>,
+    q: Option<Hertz>,
+    r: Option<Hertz>,
 }
 
 #[derive(PartialEq, Eq, Clone, Copy)]
 enum PllInstance {
     Pll,
-    #[cfg(any(stm32l4, stm32l5))]
+    #[cfg(any(stm32l4, stm32l5, stm32wb))]
     Pllsai1,
     #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
     Pllsai2,
 }
 
-fn init_pll(instance: PllInstance, config: Option<Pll>, input: &PllInput) -> PllOutput {
-    // Disable PLL
+fn pll_enable(instance: PllInstance, enabled: bool) {
     match instance {
         PllInstance::Pll => {
-            RCC.cr().modify(|w| w.set_pllon(false));
-            while RCC.cr().read().pllrdy() {}
+            RCC.cr().modify(|w| w.set_pllon(enabled));
+            while RCC.cr().read().pllrdy() != enabled {}
         }
-        #[cfg(any(stm32l4, stm32l5))]
+        #[cfg(any(stm32l4, stm32l5, stm32wb))]
         PllInstance::Pllsai1 => {
-            RCC.cr().modify(|w| w.set_pllsai1on(false));
-            while RCC.cr().read().pllsai1rdy() {}
+            RCC.cr().modify(|w| w.set_pllsai1on(enabled));
+            while RCC.cr().read().pllsai1rdy() != enabled {}
         }
         #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
         PllInstance::Pllsai2 => {
-            RCC.cr().modify(|w| w.set_pllsai2on(false));
-            while RCC.cr().read().pllsai2rdy() {}
+            RCC.cr().modify(|w| w.set_pllsai2on(enabled));
+            while RCC.cr().read().pllsai2rdy() != enabled {}
         }
     }
+}
+
+fn init_pll(instance: PllInstance, config: Option<Pll>, input: &PllInput) -> PllOutput {
+    // Disable PLL
+    pll_enable(instance, false);
 
     let Some(pll) = config else { return PllOutput::default() };
 
     let pll_src = match pll.source {
-        PLLSource::DISABLE => panic!("must not select PLL source as NONE"),
+        PLLSource::DISABLE => panic!("must not select PLL source as DISABLE"),
         PLLSource::HSE => input.hse,
         PLLSource::HSI => input.hsi,
         PLLSource::MSI => input.msi,
@@ -459,7 +498,7 @@ fn init_pll(instance: PllInstance, config: Option<Pll>, input: &PllInput) -> Pll
             w.set_pllsrc(pll.source);
             write_fields!(w);
         }),
-        #[cfg(any(stm32l4, stm32l5))]
+        #[cfg(any(stm32l4, stm32l5, stm32wb))]
         PllInstance::Pllsai1 => RCC.pllsai1cfgr().write(|w| {
             #[cfg(any(rcc_l4plus, stm32l5))]
             w.set_pllm(pll.prediv);
@@ -478,22 +517,7 @@ fn init_pll(instance: PllInstance, config: Option<Pll>, input: &PllInput) -> Pll
     }
 
     // Enable PLL
-    match instance {
-        PllInstance::Pll => {
-            RCC.cr().modify(|w| w.set_pllon(true));
-            while !RCC.cr().read().pllrdy() {}
-        }
-        #[cfg(any(stm32l4, stm32l5))]
-        PllInstance::Pllsai1 => {
-            RCC.cr().modify(|w| w.set_pllsai1on(true));
-            while !RCC.cr().read().pllsai1rdy() {}
-        }
-        #[cfg(any(stm32l47x, stm32l48x, stm32l49x, stm32l4ax, rcc_l4plus, stm32l5))]
-        PllInstance::Pllsai2 => {
-            RCC.cr().modify(|w| w.set_pllsai2on(true));
-            while !RCC.cr().read().pllsai2rdy() {}
-        }
-    }
+    pll_enable(instance, true);
 
-    PllOutput { _p: p, _q: q, _r: r }
+    PllOutput { p, q, r }
 }
diff --git a/embassy-stm32/src/rcc/mod.rs b/embassy-stm32/src/rcc/mod.rs
index 78d54f80..8cf2d6ab 100644
--- a/embassy-stm32/src/rcc/mod.rs
+++ b/embassy-stm32/src/rcc/mod.rs
@@ -19,9 +19,8 @@ pub use mco::*;
 #[cfg_attr(rcc_g4, path = "g4.rs")]
 #[cfg_attr(any(rcc_h5, rcc_h50, rcc_h7, rcc_h7rm0433, rcc_h7ab), path = "h.rs")]
 #[cfg_attr(any(rcc_l0, rcc_l0_v2, rcc_l1), path = "l0l1.rs")]
-#[cfg_attr(any(rcc_l4, rcc_l4plus, rcc_l5, rcc_wl5, rcc_wle), path = "l4l5.rs")]
+#[cfg_attr(any(rcc_l4, rcc_l4plus, rcc_l5, rcc_wl5, rcc_wle, rcc_wb), path = "l4l5.rs")]
 #[cfg_attr(rcc_u5, path = "u5.rs")]
-#[cfg_attr(rcc_wb, path = "wb.rs")]
 #[cfg_attr(rcc_wba, path = "wba.rs")]
 mod _version;
 #[cfg(feature = "low-power")]
@@ -247,3 +246,33 @@ pub(crate) mod sealed {
 }
 
 pub trait RccPeripheral: sealed::RccPeripheral + 'static {}
+
+#[allow(unused)]
+mod util {
+    use crate::time::Hertz;
+
+    pub fn calc_pclk<D>(hclk: Hertz, ppre: D) -> (Hertz, Hertz)
+    where
+        Hertz: core::ops::Div<D, Output = Hertz>,
+    {
+        let pclk = hclk / ppre;
+        let pclk_tim = if hclk == pclk { pclk } else { pclk * 2u32 };
+        (pclk, pclk_tim)
+    }
+
+    pub fn all_equal<T: Eq>(mut iter: impl Iterator<Item = T>) -> bool {
+        let Some(x) = iter.next() else { return true };
+        if !iter.all(|y| y == x) {
+            return false;
+        }
+        true
+    }
+
+    pub fn get_equal<T: Eq>(mut iter: impl Iterator<Item = T>) -> Result<Option<T>, ()> {
+        let Some(x) = iter.next() else { return Ok(None) };
+        if !iter.all(|y| y == x) {
+            return Err(());
+        }
+        Ok(Some(x))
+    }
+}
diff --git a/embassy-stm32/src/rcc/wb.rs b/embassy-stm32/src/rcc/wb.rs
deleted file mode 100644
index 2d0b2711..00000000
--- a/embassy-stm32/src/rcc/wb.rs
+++ /dev/null
@@ -1,258 +0,0 @@
-pub use crate::pac::rcc::vals::{
-    Hpre as AHBPrescaler, Hsepre as HsePrescaler, Pllm, Plln, Pllp, Pllq, Pllr, Pllsrc as PllSource,
-    Ppre as APBPrescaler, Sw as Sysclk,
-};
-use crate::rcc::{set_freqs, Clocks};
-use crate::time::{mhz, Hertz};
-
-/// HSI speed
-pub const HSI_FREQ: Hertz = Hertz(16_000_000);
-
-pub struct Hse {
-    pub prediv: HsePrescaler,
-
-    pub frequency: Hertz,
-}
-
-pub struct PllMux {
-    /// Source clock selection.
-    pub source: PllSource,
-
-    /// PLL pre-divider (DIVM). Must be between 1 and 63.
-    pub prediv: Pllm,
-}
-
-pub struct Pll {
-    /// PLL multiplication factor. Must be between 4 and 512.
-    pub mul: Plln,
-
-    /// PLL P division factor. If None, PLL P output is disabled. Must be between 1 and 128.
-    /// On PLL1, it must be even (in particular, it cannot be 1.)
-    pub divp: Option<Pllp>,
-    /// PLL Q division factor. If None, PLL Q output is disabled. Must be between 1 and 128.
-    pub divq: Option<Pllq>,
-    /// PLL R division factor. If None, PLL R output is disabled. Must be between 1 and 128.
-    pub divr: Option<Pllr>,
-}
-
-/// Clocks configutation
-pub struct Config {
-    pub hse: Option<Hse>,
-    pub sys: Sysclk,
-    pub mux: Option<PllMux>,
-    pub hsi48: bool,
-
-    pub pll: Option<Pll>,
-    pub pllsai: Option<Pll>,
-
-    pub ahb1_pre: AHBPrescaler,
-    pub ahb2_pre: AHBPrescaler,
-    pub ahb3_pre: AHBPrescaler,
-    pub apb1_pre: APBPrescaler,
-    pub apb2_pre: APBPrescaler,
-
-    pub ls: super::LsConfig,
-}
-
-pub const WPAN_DEFAULT: Config = Config {
-    hse: Some(Hse {
-        frequency: mhz(32),
-        prediv: HsePrescaler::DIV1,
-    }),
-    sys: Sysclk::PLL1_R,
-    mux: Some(PllMux {
-        source: PllSource::HSE,
-        prediv: Pllm::DIV2,
-    }),
-    hsi48: true,
-
-    ls: super::LsConfig::default_lse(),
-
-    pll: Some(Pll {
-        mul: Plln::MUL12,
-        divp: Some(Pllp::DIV3),
-        divq: Some(Pllq::DIV4),
-        divr: Some(Pllr::DIV3),
-    }),
-    pllsai: None,
-
-    ahb1_pre: AHBPrescaler::DIV1,
-    ahb2_pre: AHBPrescaler::DIV2,
-    ahb3_pre: AHBPrescaler::DIV1,
-    apb1_pre: APBPrescaler::DIV1,
-    apb2_pre: APBPrescaler::DIV1,
-};
-
-impl Default for Config {
-    #[inline]
-    fn default() -> Config {
-        Config {
-            sys: Sysclk::HSI,
-            hse: None,
-            mux: None,
-            pll: None,
-            pllsai: None,
-            hsi48: true,
-
-            ls: Default::default(),
-
-            ahb1_pre: AHBPrescaler::DIV1,
-            ahb2_pre: AHBPrescaler::DIV1,
-            ahb3_pre: AHBPrescaler::DIV1,
-            apb1_pre: APBPrescaler::DIV1,
-            apb2_pre: APBPrescaler::DIV1,
-        }
-    }
-}
-
-#[cfg(stm32wb)]
-/// RCC initialization function
-pub(crate) unsafe fn init(config: Config) {
-    let hse_clk = config.hse.as_ref().map(|hse| hse.frequency / hse.prediv);
-
-    let mux_clk = config.mux.as_ref().map(|pll_mux| {
-        (match pll_mux.source {
-            PllSource::HSE => hse_clk.unwrap(),
-            PllSource::HSI => HSI_FREQ,
-            _ => unreachable!(),
-        } / pll_mux.prediv)
-    });
-
-    let (pll_r, _pll_q, _pll_p) = match &config.pll {
-        Some(pll) => {
-            let pll_vco = mux_clk.unwrap() * pll.mul as u32;
-
-            (
-                pll.divr.map(|divr| pll_vco / divr),
-                pll.divq.map(|divq| pll_vco / divq),
-                pll.divp.map(|divp| pll_vco / divp),
-            )
-        }
-        None => (None, None, None),
-    };
-
-    let sys_clk = match config.sys {
-        Sysclk::HSE => hse_clk.unwrap(),
-        Sysclk::HSI => HSI_FREQ,
-        Sysclk::PLL1_R => pll_r.unwrap(),
-        _ => unreachable!(),
-    };
-
-    let ahb1_clk = sys_clk / config.ahb1_pre;
-    let ahb2_clk = sys_clk / config.ahb2_pre;
-    let ahb3_clk = sys_clk / config.ahb3_pre;
-
-    let (apb1_clk, apb1_tim_clk) = match config.apb1_pre {
-        APBPrescaler::DIV1 => (ahb1_clk, ahb1_clk),
-        pre => {
-            let freq = ahb1_clk / pre;
-            (freq, freq * 2u32)
-        }
-    };
-
-    let (apb2_clk, apb2_tim_clk) = match config.apb2_pre {
-        APBPrescaler::DIV1 => (ahb1_clk, ahb1_clk),
-        pre => {
-            let freq = ahb1_clk / pre;
-            (freq, freq * 2u32)
-        }
-    };
-
-    let rcc = crate::pac::RCC;
-
-    let needs_hsi = if let Some(pll_mux) = &config.mux {
-        pll_mux.source == PllSource::HSI
-    } else {
-        false
-    };
-
-    if needs_hsi || config.sys == Sysclk::HSI {
-        rcc.cr().modify(|w| {
-            w.set_hsion(true);
-        });
-
-        while !rcc.cr().read().hsirdy() {}
-    }
-
-    rcc.cfgr().modify(|w| w.set_stopwuck(true));
-
-    let rtc = config.ls.init();
-
-    match &config.hse {
-        Some(hse) => {
-            rcc.cr().modify(|w| {
-                w.set_hsepre(hse.prediv);
-                w.set_hseon(true);
-            });
-
-            while !rcc.cr().read().hserdy() {}
-        }
-        _ => {}
-    }
-
-    match &config.mux {
-        Some(pll_mux) => {
-            rcc.pllcfgr().modify(|w| {
-                w.set_pllm(pll_mux.prediv);
-                w.set_pllsrc(pll_mux.source.into());
-            });
-        }
-        _ => {}
-    };
-
-    match &config.pll {
-        Some(pll) => {
-            rcc.pllcfgr().modify(|w| {
-                w.set_plln(pll.mul);
-                pll.divp.map(|divp| {
-                    w.set_pllpen(true);
-                    w.set_pllp(divp)
-                });
-                pll.divq.map(|divq| {
-                    w.set_pllqen(true);
-                    w.set_pllq(divq)
-                });
-                pll.divr.map(|divr| {
-                    w.set_pllren(true);
-                    w.set_pllr(divr);
-                });
-            });
-
-            rcc.cr().modify(|w| w.set_pllon(true));
-
-            while !rcc.cr().read().pllrdy() {}
-        }
-        _ => {}
-    }
-
-    let _hsi48 = config.hsi48.then(|| {
-        rcc.crrcr().modify(|w| w.set_hsi48on(true));
-        while !rcc.crrcr().read().hsi48rdy() {}
-
-        Hertz(48_000_000)
-    });
-
-    rcc.cfgr().modify(|w| {
-        w.set_sw(config.sys.into());
-        w.set_hpre(config.ahb1_pre);
-        w.set_ppre1(config.apb1_pre);
-        w.set_ppre2(config.apb2_pre);
-    });
-
-    rcc.extcfgr().modify(|w| {
-        w.set_c2hpre(config.ahb2_pre);
-        w.set_shdhpre(config.ahb3_pre);
-    });
-
-    set_freqs(Clocks {
-        sys: sys_clk,
-        hclk1: ahb1_clk,
-        hclk2: ahb2_clk,
-        hclk3: ahb3_clk,
-        pclk1: apb1_clk,
-        pclk2: apb2_clk,
-        pclk1_tim: apb1_tim_clk,
-        pclk2_tim: apb2_tim_clk,
-        rtc,
-    })
-}
diff --git a/examples/stm32h5/src/bin/eth.rs b/examples/stm32h5/src/bin/eth.rs
index 6e40f0ac..5bec9d44 100644
--- a/examples/stm32h5/src/bin/eth.rs
+++ b/examples/stm32h5/src/bin/eth.rs
@@ -43,7 +43,7 @@ async fn main(spawner: Spawner) -> ! {
         mode: HseMode::BypassDigital,
     });
     config.rcc.pll1 = Some(Pll {
-        source: PllSource::Hse,
+        source: PllSource::HSE,
         prediv: PllPreDiv::DIV2,
         mul: PllMul::MUL125,
         divp: Some(PllDiv::DIV2),
@@ -54,7 +54,7 @@ async fn main(spawner: Spawner) -> ! {
     config.rcc.apb1_pre = APBPrescaler::DIV1;
     config.rcc.apb2_pre = APBPrescaler::DIV1;
     config.rcc.apb3_pre = APBPrescaler::DIV1;
-    config.rcc.sys = Sysclk::Pll1P;
+    config.rcc.sys = Sysclk::PLL1_P;
     config.rcc.voltage_scale = VoltageScale::Scale0;
     let p = embassy_stm32::init(config);
     info!("Hello World!");
diff --git a/examples/stm32h5/src/bin/usb_serial.rs b/examples/stm32h5/src/bin/usb_serial.rs
index 3b3c38e1..735826a6 100644
--- a/examples/stm32h5/src/bin/usb_serial.rs
+++ b/examples/stm32h5/src/bin/usb_serial.rs
@@ -30,7 +30,7 @@ async fn main(_spawner: Spawner) {
         mode: HseMode::BypassDigital,
     });
     config.rcc.pll1 = Some(Pll {
-        source: PllSource::Hse,
+        source: PllSource::HSE,
         prediv: PllPreDiv::DIV2,
         mul: PllMul::MUL125,
         divp: Some(PllDiv::DIV2), // 250mhz
@@ -41,7 +41,7 @@ async fn main(_spawner: Spawner) {
     config.rcc.apb1_pre = APBPrescaler::DIV4;
     config.rcc.apb2_pre = APBPrescaler::DIV2;
     config.rcc.apb3_pre = APBPrescaler::DIV4;
-    config.rcc.sys = Sysclk::Pll1P;
+    config.rcc.sys = Sysclk::PLL1_P;
     config.rcc.voltage_scale = VoltageScale::Scale0;
     let p = embassy_stm32::init(config);
 
diff --git a/examples/stm32h7/src/bin/adc.rs b/examples/stm32h7/src/bin/adc.rs
index 4a358a35..e367827e 100644
--- a/examples/stm32h7/src/bin/adc.rs
+++ b/examples/stm32h7/src/bin/adc.rs
@@ -14,10 +14,10 @@ async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
@@ -25,13 +25,14 @@ async fn main(_spawner: Spawner) {
             divr: None,
         });
         config.rcc.pll2 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV8), // 100mhz
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/camera.rs b/examples/stm32h7/src/bin/camera.rs
index 8195430b..23ece1c3 100644
--- a/examples/stm32h7/src/bin/camera.rs
+++ b/examples/stm32h7/src/bin/camera.rs
@@ -28,17 +28,17 @@ async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: Some(PllDiv::DIV8), // 100mhz
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/dac.rs b/examples/stm32h7/src/bin/dac.rs
index 82122189..35fd6550 100644
--- a/examples/stm32h7/src/bin/dac.rs
+++ b/examples/stm32h7/src/bin/dac.rs
@@ -16,10 +16,10 @@ fn main() -> ! {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
@@ -27,13 +27,14 @@ fn main() -> ! {
             divr: None,
         });
         config.rcc.pll2 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV8), // 100mhz
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/dac_dma.rs b/examples/stm32h7/src/bin/dac_dma.rs
index 334986a0..e141fc48 100644
--- a/examples/stm32h7/src/bin/dac_dma.rs
+++ b/examples/stm32h7/src/bin/dac_dma.rs
@@ -24,10 +24,10 @@ async fn main(spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
@@ -35,13 +35,14 @@ async fn main(spawner: Spawner) {
             divr: None,
         });
         config.rcc.pll2 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV8), // 100mhz
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/eth.rs b/examples/stm32h7/src/bin/eth.rs
index 81d9c734..e37d8797 100644
--- a/examples/stm32h7/src/bin/eth.rs
+++ b/examples/stm32h7/src/bin/eth.rs
@@ -34,18 +34,18 @@ async fn main(spawner: Spawner) -> ! {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
         config.rcc.hsi48 = true; // needed for RNG
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/eth_client.rs b/examples/stm32h7/src/bin/eth_client.rs
index 33813706..88df53f0 100644
--- a/examples/stm32h7/src/bin/eth_client.rs
+++ b/examples/stm32h7/src/bin/eth_client.rs
@@ -35,18 +35,18 @@ async fn main(spawner: Spawner) -> ! {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
         config.rcc.hsi48 = true; // needed for RNG
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/fmc.rs b/examples/stm32h7/src/bin/fmc.rs
index cffd4709..54e2c362 100644
--- a/examples/stm32h7/src/bin/fmc.rs
+++ b/examples/stm32h7/src/bin/fmc.rs
@@ -14,17 +14,17 @@ async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: Some(PllDiv::DIV8), // 100mhz
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/low_level_timer_api.rs b/examples/stm32h7/src/bin/low_level_timer_api.rs
index 0355ac07..e4bac8a5 100644
--- a/examples/stm32h7/src/bin/low_level_timer_api.rs
+++ b/examples/stm32h7/src/bin/low_level_timer_api.rs
@@ -17,18 +17,18 @@ async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
         config.rcc.hsi48 = true; // needed for RNG
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: Some(PllDiv::DIV8), // 100mhz
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/pwm.rs b/examples/stm32h7/src/bin/pwm.rs
index 973a10cd..c55d780a 100644
--- a/examples/stm32h7/src/bin/pwm.rs
+++ b/examples/stm32h7/src/bin/pwm.rs
@@ -17,17 +17,17 @@ async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/sdmmc.rs b/examples/stm32h7/src/bin/sdmmc.rs
index ecb8d654..be968ff7 100644
--- a/examples/stm32h7/src/bin/sdmmc.rs
+++ b/examples/stm32h7/src/bin/sdmmc.rs
@@ -18,17 +18,17 @@ async fn main(_spawner: Spawner) -> ! {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: Some(PllDiv::DIV4), // default clock chosen by SDMMCSEL. 200 Mhz
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/spi.rs b/examples/stm32h7/src/bin/spi.rs
index f128d4a5..a8db0ff7 100644
--- a/examples/stm32h7/src/bin/spi.rs
+++ b/examples/stm32h7/src/bin/spi.rs
@@ -40,17 +40,17 @@ fn main() -> ! {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: Some(PllDiv::DIV8), // used by SPI3. 100Mhz.
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/spi_dma.rs b/examples/stm32h7/src/bin/spi_dma.rs
index d4c0bcdb..561052e4 100644
--- a/examples/stm32h7/src/bin/spi_dma.rs
+++ b/examples/stm32h7/src/bin/spi_dma.rs
@@ -36,17 +36,17 @@ fn main() -> ! {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: Some(PllDiv::DIV8), // used by SPI3. 100Mhz.
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32h7/src/bin/usb_serial.rs b/examples/stm32h7/src/bin/usb_serial.rs
index c1e5144b..19d77183 100644
--- a/examples/stm32h7/src/bin/usb_serial.rs
+++ b/examples/stm32h7/src/bin/usb_serial.rs
@@ -23,18 +23,18 @@ async fn main(_spawner: Spawner) {
     let mut config = Config::default();
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
         config.rcc.hsi48 = true; // needed for USB
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
diff --git a/examples/stm32wl/src/bin/lora_lorawan.rs b/examples/stm32wl/src/bin/lora_lorawan.rs
index e26c274a..35a6a842 100644
--- a/examples/stm32wl/src/bin/lora_lorawan.rs
+++ b/examples/stm32wl/src/bin/lora_lorawan.rs
@@ -39,6 +39,7 @@ async fn main(_spawner: Spawner) {
         config.rcc.hse = Some(Hse {
             freq: Hertz(32_000_000),
             mode: HseMode::Bypass,
+            prescaler: HsePrescaler::DIV1,
         });
         config.rcc.mux = ClockSrc::PLL1_R;
         config.rcc.pll = Some(Pll {
diff --git a/examples/stm32wl/src/bin/lora_p2p_receive.rs b/examples/stm32wl/src/bin/lora_p2p_receive.rs
index be33f39c..1c485d73 100644
--- a/examples/stm32wl/src/bin/lora_p2p_receive.rs
+++ b/examples/stm32wl/src/bin/lora_p2p_receive.rs
@@ -11,6 +11,7 @@ use embassy_lora::iv::{InterruptHandler, Stm32wlInterfaceVariant};
 use embassy_stm32::bind_interrupts;
 use embassy_stm32::gpio::{Level, Output, Pin, Speed};
 use embassy_stm32::spi::Spi;
+use embassy_stm32::time::Hertz;
 use embassy_time::{Delay, Timer};
 use lora_phy::mod_params::*;
 use lora_phy::sx1261_2::SX1261_2;
@@ -26,7 +27,23 @@ bind_interrupts!(struct Irqs{
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
-    config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE;
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(32_000_000),
+            mode: HseMode::Bypass,
+            prescaler: HsePrescaler::DIV1,
+        });
+        config.rcc.mux = ClockSrc::PLL1_R;
+        config.rcc.pll = Some(Pll {
+            source: PLLSource::HSE,
+            prediv: PllPreDiv::DIV2,
+            mul: PllMul::MUL6,
+            divp: None,
+            divq: Some(PllQDiv::DIV2), // PLL1_Q clock (32 / 2 * 6 / 2), used for RNG
+            divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
+        });
+    }
     let p = embassy_stm32::init(config);
 
     let spi = Spi::new_subghz(p.SUBGHZSPI, p.DMA1_CH1, p.DMA1_CH2);
diff --git a/examples/stm32wl/src/bin/lora_p2p_send.rs b/examples/stm32wl/src/bin/lora_p2p_send.rs
index 85f6a84b..3afa78ac 100644
--- a/examples/stm32wl/src/bin/lora_p2p_send.rs
+++ b/examples/stm32wl/src/bin/lora_p2p_send.rs
@@ -11,6 +11,7 @@ use embassy_lora::iv::{InterruptHandler, Stm32wlInterfaceVariant};
 use embassy_stm32::bind_interrupts;
 use embassy_stm32::gpio::{Level, Output, Pin, Speed};
 use embassy_stm32::spi::Spi;
+use embassy_stm32::time::Hertz;
 use embassy_time::Delay;
 use lora_phy::mod_params::*;
 use lora_phy::sx1261_2::SX1261_2;
@@ -26,7 +27,23 @@ bind_interrupts!(struct Irqs{
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
-    config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE;
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(32_000_000),
+            mode: HseMode::Bypass,
+            prescaler: HsePrescaler::DIV1,
+        });
+        config.rcc.mux = ClockSrc::PLL1_R;
+        config.rcc.pll = Some(Pll {
+            source: PLLSource::HSE,
+            prediv: PllPreDiv::DIV2,
+            mul: PllMul::MUL6,
+            divp: None,
+            divq: Some(PllQDiv::DIV2), // PLL1_Q clock (32 / 2 * 6 / 2), used for RNG
+            divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
+        });
+    }
     let p = embassy_stm32::init(config);
 
     let spi = Spi::new_subghz(p.SUBGHZSPI, p.DMA1_CH1, p.DMA1_CH2);
diff --git a/examples/stm32wl/src/bin/random.rs b/examples/stm32wl/src/bin/random.rs
index 2cf7ef9d..1a8822b4 100644
--- a/examples/stm32wl/src/bin/random.rs
+++ b/examples/stm32wl/src/bin/random.rs
@@ -21,6 +21,7 @@ async fn main(_spawner: Spawner) {
         config.rcc.hse = Some(Hse {
             freq: Hertz(32_000_000),
             mode: HseMode::Bypass,
+            prescaler: HsePrescaler::DIV1,
         });
         config.rcc.mux = ClockSrc::PLL1_R;
         config.rcc.pll = Some(Pll {
diff --git a/examples/stm32wl/src/bin/rtc.rs b/examples/stm32wl/src/bin/rtc.rs
index 9ebb05f2..b3b7f9c5 100644
--- a/examples/stm32wl/src/bin/rtc.rs
+++ b/examples/stm32wl/src/bin/rtc.rs
@@ -5,20 +5,34 @@
 use chrono::{NaiveDate, NaiveDateTime};
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_stm32::rcc::{ClockSrc, LsConfig};
 use embassy_stm32::rtc::{Rtc, RtcConfig};
+use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use embassy_time::Timer;
 use {defmt_rtt as _, panic_probe as _};
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = {
-        let mut config = Config::default();
-        config.rcc.mux = ClockSrc::HSE;
+    let mut config = Config::default();
+    {
+        use embassy_stm32::rcc::*;
         config.rcc.ls = LsConfig::default_lse();
-        embassy_stm32::init(config)
-    };
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(32_000_000),
+            mode: HseMode::Bypass,
+            prescaler: HsePrescaler::DIV1,
+        });
+        config.rcc.mux = ClockSrc::PLL1_R;
+        config.rcc.pll = Some(Pll {
+            source: PLLSource::HSE,
+            prediv: PllPreDiv::DIV2,
+            mul: PllMul::MUL6,
+            divp: None,
+            divq: Some(PllQDiv::DIV2), // PLL1_Q clock (32 / 2 * 6 / 2), used for RNG
+            divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
+        });
+    }
+    let p = embassy_stm32::init(config);
     info!("Hello World!");
 
     let now = NaiveDate::from_ymd_opt(2020, 5, 15)
diff --git a/tests/stm32/src/common.rs b/tests/stm32/src/common.rs
index cb173815..ff808281 100644
--- a/tests/stm32/src/common.rs
+++ b/tests/stm32/src/common.rs
@@ -227,6 +227,11 @@ pub fn config() -> Config {
     #[allow(unused_mut)]
     let mut config = Config::default();
 
+    #[cfg(feature = "stm32wb55rg")]
+    {
+        config.rcc = embassy_stm32::rcc::WPAN_DEFAULT;
+    }
+
     #[cfg(feature = "stm32f207zg")]
     {
         use embassy_stm32::rcc::*;
@@ -307,7 +312,7 @@ pub fn config() -> Config {
             mode: HseMode::BypassDigital,
         });
         config.rcc.pll1 = Some(Pll {
-            source: PllSource::Hse,
+            source: PllSource::HSE,
             prediv: PllPreDiv::DIV2,
             mul: PllMul::MUL125,
             divp: Some(PllDiv::DIV2),
@@ -318,18 +323,18 @@ pub fn config() -> Config {
         config.rcc.apb1_pre = APBPrescaler::DIV1;
         config.rcc.apb2_pre = APBPrescaler::DIV1;
         config.rcc.apb3_pre = APBPrescaler::DIV1;
-        config.rcc.sys = Sysclk::Pll1P;
+        config.rcc.sys = Sysclk::PLL1_P;
         config.rcc.voltage_scale = VoltageScale::Scale0;
     }
 
     #[cfg(any(feature = "stm32h755zi", feature = "stm32h753zi"))]
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
         config.rcc.hsi48 = true; // needed for RNG
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV2),
@@ -337,13 +342,14 @@ pub fn config() -> Config {
             divr: None,
         });
         config.rcc.pll2 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL50,
             divp: Some(PllDiv::DIV8), // 100mhz
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 400 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
@@ -356,11 +362,11 @@ pub fn config() -> Config {
     #[cfg(any(feature = "stm32h7a3zi"))]
     {
         use embassy_stm32::rcc::*;
-        config.rcc.hsi = Some(Hsi::Mhz64);
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
         config.rcc.csi = true;
         config.rcc.hsi48 = true; // needed for RNG
-        config.rcc.pll_src = PllSource::Hsi;
         config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL35,
             divp: Some(PllDiv::DIV2), // 280 Mhz
@@ -368,13 +374,14 @@ pub fn config() -> Config {
             divr: None,
         });
         config.rcc.pll2 = Some(Pll {
+            source: PllSource::HSI,
             prediv: PllPreDiv::DIV4,
             mul: PllMul::MUL35,
             divp: Some(PllDiv::DIV8), // 70 Mhz
             divq: None,
             divr: None,
         });
-        config.rcc.sys = Sysclk::Pll1P; // 280 Mhz
+        config.rcc.sys = Sysclk::PLL1_P; // 280 Mhz
         config.rcc.ahb_pre = AHBPrescaler::DIV1; // 280 Mhz
         config.rcc.apb1_pre = APBPrescaler::DIV2; // 140 Mhz
         config.rcc.apb2_pre = APBPrescaler::DIV2; // 140 Mhz
@@ -405,6 +412,7 @@ pub fn config() -> Config {
         config.rcc.hse = Some(Hse {
             freq: Hertz(32_000_000),
             mode: HseMode::Bypass,
+            prescaler: HsePrescaler::DIV1,
         });
         config.rcc.mux = ClockSrc::PLL1_R;
         config.rcc.pll = Some(Pll {