diff --git a/examples/stm32l4/Cargo.toml b/examples/stm32l4/Cargo.toml
index 48125c4f..069c1434 100644
--- a/examples/stm32l4/Cargo.toml
+++ b/examples/stm32l4/Cargo.toml
@@ -19,7 +19,7 @@ defmt-error = []
 [dependencies]
 embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-trace"] }
 embassy-traits = { version = "0.1.0", path = "../../embassy-traits", features = ["defmt"] }
-embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "defmt-trace", "stm32l4s5vi"]  }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "defmt-trace", "unstable-pac", "stm32l4s5vi"]  }
 embassy-extras = {version = "0.1.0", path = "../../embassy-extras" }
 stm32l4 = { version = "0.13", features = ["stm32l4x5" ] }
 stm32l4xx-hal = { version = "0.6.0", features = ["stm32l4x5"] }
diff --git a/examples/stm32l4/src/bin/blinky.rs b/examples/stm32l4/src/bin/blinky.rs
index ae4b3d1d..0af16867 100644
--- a/examples/stm32l4/src/bin/blinky.rs
+++ b/examples/stm32l4/src/bin/blinky.rs
@@ -8,34 +8,32 @@
 
 #[path = "../example_common.rs"]
 mod example_common;
+use cortex_m_rt::entry;
 use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::pac;
 use embedded_hal::digital::v2::OutputPin;
 use example_common::*;
 
-use cortex_m_rt::entry;
-use stm32l4::stm32l4x5 as pac;
-
 #[entry]
 fn main() -> ! {
     info!("Hello World!");
 
-    let pp = pac::Peripherals::take().unwrap();
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
 
-    pp.DBGMCU.cr.modify(|_, w| {
-        w.dbg_sleep().set_bit();
-        w.dbg_standby().set_bit();
-        w.dbg_stop().set_bit()
-    });
-
-    pp.RCC.ahb2enr.modify(|_, w| {
-        w.gpioaen().set_bit();
-        w.gpioben().set_bit();
-        w.gpiocen().set_bit();
-        w.gpioden().set_bit();
-        w.gpioeen().set_bit();
-        w.gpiofen().set_bit();
-        w
-    });
+        pac::RCC.ahb2enr().modify(|w| {
+            w.set_gpioaen(true);
+            w.set_gpioben(true);
+            w.set_gpiocen(true);
+            w.set_gpioden(true);
+            w.set_gpioeen(true);
+            w.set_gpiofen(true);
+        });
+    }
 
     let p = embassy_stm32::init(Default::default());
 
diff --git a/examples/stm32l4/src/bin/button.rs b/examples/stm32l4/src/bin/button.rs
index 3efeee20..c7246360 100644
--- a/examples/stm32l4/src/bin/button.rs
+++ b/examples/stm32l4/src/bin/button.rs
@@ -8,34 +8,36 @@
 
 #[path = "../example_common.rs"]
 mod example_common;
+use cortex_m_rt::entry;
 use embassy_stm32::gpio::{Input, Level, Output, Pull, Speed};
+use embassy_stm32::pac;
 use embedded_hal::digital::v2::{InputPin, OutputPin};
 use example_common::*;
 
-use cortex_m_rt::entry;
-use stm32l4::stm32l4x5 as pac;
-
 #[entry]
 fn main() -> ! {
     info!("Hello World!");
 
-    let pp = pac::Peripherals::take().unwrap();
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
 
-    pp.DBGMCU.cr.modify(|_, w| {
-        w.dbg_sleep().set_bit();
-        w.dbg_standby().set_bit();
-        w.dbg_stop().set_bit()
-    });
+        pac::RCC.apb2enr().modify(|w| {
+            w.set_syscfgen(true);
+        });
 
-    pp.RCC.ahb2enr.modify(|_, w| {
-        w.gpioaen().set_bit();
-        w.gpioben().set_bit();
-        w.gpiocen().set_bit();
-        w.gpioden().set_bit();
-        w.gpioeen().set_bit();
-        w.gpiofen().set_bit();
-        w
-    });
+        pac::RCC.ahb2enr().modify(|w| {
+            w.set_gpioaen(true);
+            w.set_gpioben(true);
+            w.set_gpiocen(true);
+            w.set_gpioden(true);
+            w.set_gpioeen(true);
+            w.set_gpiofen(true);
+        });
+    }
 
     let p = embassy_stm32::init(Default::default());
 
diff --git a/examples/stm32l4/src/bin/button_exti.rs b/examples/stm32l4/src/bin/button_exti.rs
index c6b7c83e..6a06e437 100644
--- a/examples/stm32l4/src/bin/button_exti.rs
+++ b/examples/stm32l4/src/bin/button_exti.rs
@@ -8,17 +8,16 @@
 
 #[path = "../example_common.rs"]
 mod example_common;
+use cortex_m_rt::entry;
 use embassy::executor::Executor;
 use embassy::time::Clock;
 use embassy::util::Forever;
 use embassy_stm32::exti::ExtiInput;
 use embassy_stm32::gpio::{Input, Pull};
+use embassy_stm32::pac;
 use embassy_traits::gpio::{WaitForFallingEdge, WaitForRisingEdge};
 use example_common::*;
 
-use cortex_m_rt::entry;
-use stm32l4::stm32l4x5 as pac;
-
 #[embassy::task]
 async fn main_task() {
     let p = embassy_stm32::init(Default::default());
@@ -50,28 +49,26 @@ static EXECUTOR: Forever<Executor> = Forever::new();
 fn main() -> ! {
     info!("Hello World!");
 
-    let pp = pac::Peripherals::take().unwrap();
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
 
-    pp.DBGMCU.cr.modify(|_, w| {
-        w.dbg_sleep().set_bit();
-        w.dbg_standby().set_bit();
-        w.dbg_stop().set_bit()
-    });
+        pac::RCC.apb2enr().modify(|w| {
+            w.set_syscfgen(true);
+        });
 
-    pp.RCC.ahb2enr.modify(|_, w| {
-        w.gpioaen().set_bit();
-        w.gpioben().set_bit();
-        w.gpiocen().set_bit();
-        w.gpioden().set_bit();
-        w.gpioeen().set_bit();
-        w.gpiofen().set_bit();
-        w
-    });
-
-    pp.RCC.apb2enr.modify(|_, w| {
-        w.syscfgen().set_bit();
-        w
-    });
+        pac::RCC.ahb2enr().modify(|w| {
+            w.set_gpioaen(true);
+            w.set_gpioben(true);
+            w.set_gpiocen(true);
+            w.set_gpioden(true);
+            w.set_gpioeen(true);
+            w.set_gpiofen(true);
+        });
+    }
 
     unsafe { embassy::time::set_clock(&ZeroClock) };
 
diff --git a/examples/stm32l4/src/bin/spi.rs b/examples/stm32l4/src/bin/spi.rs
index 28c563c1..45ccfceb 100644
--- a/examples/stm32l4/src/bin/spi.rs
+++ b/examples/stm32l4/src/bin/spi.rs
@@ -9,37 +9,39 @@
 #[path = "../example_common.rs"]
 mod example_common;
 
-use embassy_stm32::gpio::{Level, Output, Speed};
-use embedded_hal::digital::v2::OutputPin;
-use example_common::*;
-
 use cortex_m_rt::entry;
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::pac;
 use embassy_stm32::spi::{Config, Spi};
 use embassy_stm32::time::Hertz;
 use embedded_hal::blocking::spi::Transfer;
-use stm32l4::stm32l4x5 as pac;
+use embedded_hal::digital::v2::OutputPin;
+use example_common::*;
 
 #[entry]
 fn main() -> ! {
     info!("Hello World, dude!");
 
-    let pp = pac::Peripherals::take().unwrap();
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
 
-    pp.DBGMCU.cr.modify(|_, w| {
-        w.dbg_sleep().set_bit();
-        w.dbg_standby().set_bit();
-        w.dbg_stop().set_bit()
-    });
+        pac::RCC.apb2enr().modify(|w| {
+            w.set_syscfgen(true);
+        });
 
-    pp.RCC.ahb2enr.modify(|_, w| {
-        w.gpioaen().set_bit();
-        w.gpioben().set_bit();
-        w.gpiocen().set_bit();
-        w.gpioden().set_bit();
-        w.gpioeen().set_bit();
-        w.gpiofen().set_bit();
-        w
-    });
+        pac::RCC.ahb2enr().modify(|w| {
+            w.set_gpioaen(true);
+            w.set_gpioben(true);
+            w.set_gpiocen(true);
+            w.set_gpioden(true);
+            w.set_gpioeen(true);
+            w.set_gpiofen(true);
+        });
+    }
 
     let p = embassy_stm32::init(Default::default());
 
diff --git a/examples/stm32l4/src/bin/usart.rs b/examples/stm32l4/src/bin/usart.rs
index dc0f649b..e9a44f15 100644
--- a/examples/stm32l4/src/bin/usart.rs
+++ b/examples/stm32l4/src/bin/usart.rs
@@ -1,4 +1,3 @@
-
 #![no_std]
 #![no_main]
 #![feature(trait_alias)]
@@ -10,16 +9,15 @@
 #[path = "../example_common.rs"]
 mod example_common;
 use cortex_m::prelude::_embedded_hal_blocking_serial_Write;
+use cortex_m_rt::entry;
 use embassy::executor::Executor;
 use embassy::time::Clock;
 use embassy::util::Forever;
+use embassy_stm32::dma_traits::NoDma;
+use embassy_stm32::pac;
 use embassy_stm32::usart::{Config, Uart};
 use example_common::*;
 
-use cortex_m_rt::entry;
-use stm32l4::stm32l4x5 as pac;
-use embassy_stm32::dma_traits::NoDma;
-
 #[embassy::task]
 async fn main_task() {
     let p = embassy_stm32::init(Default::default());
@@ -51,38 +49,34 @@ static EXECUTOR: Forever<Executor> = Forever::new();
 fn main() -> ! {
     info!("Hello World!");
 
-    let pp = pac::Peripherals::take().unwrap();
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
 
-    pp.DBGMCU.cr.modify(|_, w| {
-        w.dbg_sleep().set_bit();
-        w.dbg_standby().set_bit();
-        w.dbg_stop().set_bit()
-    });
+        pac::RCC.ahb1enr().modify(|w| {
+            w.set_dma1en(true);
+        });
 
-    pp.RCC.ahb1enr.modify(|_, w| {
-        w.dma1en().set_bit();
-        w
-    });
+        pac::RCC.ahb2enr().modify(|w| {
+            w.set_gpioaen(true);
+            w.set_gpioben(true);
+            w.set_gpiocen(true);
+            w.set_gpioden(true);
+            w.set_gpioeen(true);
+            w.set_gpiofen(true);
+        });
 
-    pp.RCC.ahb2enr.modify(|_, w| {
-        w.gpioaen().set_bit();
-        w.gpioben().set_bit();
-        w.gpiocen().set_bit();
-        w.gpioden().set_bit();
-        w.gpioeen().set_bit();
-        w.gpiofen().set_bit();
-        w
-    });
+        pac::RCC.apb1enr1().modify(|w| {
+            w.set_uart4en(true);
+        });
 
-    pp.RCC.apb1enr1.modify(|_, w| {
-        w.uart4en().set_bit();
-        w
-    });
-
-    pp.RCC.apb2enr.modify(|_, w| {
-        w.syscfgen().set_bit();
-        w
-    });
+        pac::RCC.apb2enr().modify(|w| {
+            w.set_syscfgen(true);
+        });
+    }
 
     unsafe { embassy::time::set_clock(&ZeroClock) };
 
@@ -91,4 +85,4 @@ fn main() -> ! {
     executor.run(|spawner| {
         unwrap!(spawner.spawn(main_task()));
     })
-}
\ No newline at end of file
+}
diff --git a/examples/stm32l4/src/bin/usart_dma.rs b/examples/stm32l4/src/bin/usart_dma.rs
index 6a234185..1eadd3ad 100644
--- a/examples/stm32l4/src/bin/usart_dma.rs
+++ b/examples/stm32l4/src/bin/usart_dma.rs
@@ -13,12 +13,12 @@ use cortex_m_rt::entry;
 use embassy::executor::Executor;
 use embassy::time::Clock;
 use embassy::util::Forever;
+use embassy_stm32::dma_traits::NoDma;
+use embassy_stm32::pac;
 use embassy_stm32::usart::{Config, Uart};
+use embassy_traits::uart::Write as _;
 use example_common::*;
 use heapless::String;
-use stm32l4::stm32l4x5 as pac;
-use embassy_stm32::dma_traits::NoDma;
-use embassy_traits::uart::Write as AsyncWrite;
 
 #[embassy::task]
 async fn main_task() {
@@ -31,7 +31,7 @@ async fn main_task() {
         let mut s: String<128> = String::new();
         core::write!(&mut s, "Hello DMA World {}!\r\n", n).unwrap();
 
-        usart.write( s.as_bytes() ).await.ok();
+        usart.write(s.as_bytes()).await.ok();
 
         info!("wrote DMA");
     }
@@ -51,40 +51,32 @@ static EXECUTOR: Forever<Executor> = Forever::new();
 fn main() -> ! {
     info!("Hello World!");
 
-    let pp = pac::Peripherals::take().unwrap();
+    unsafe {
+        pac::DBGMCU.cr().modify(|w| {
+            w.set_dbg_sleep(true);
+            w.set_dbg_standby(true);
+            w.set_dbg_stop(true);
+        });
 
-    pp.DBGMCU.cr.modify(|_, w| {
-        w.dbg_sleep().set_bit();
-        w.dbg_standby().set_bit();
-        w.dbg_stop().set_bit()
-    });
+        pac::RCC.apb2enr().modify(|w| {
+            w.set_syscfgen(true);
+        });
 
-    pp.RCC.ahb1enr.modify(|_, w| {
-        unsafe {
-            w.bits( 0x07 );
-        }
-        w
-        //w.dmamuxen().set_bit();
-        //w.dma1en().set_bit();
-        //w.dma2en().set_bit();
-        //w
-    });
-
-    pp.RCC.ahb2enr.modify(|_, w| {
-        w.gpioaen().set_bit();
-        w.gpioben().set_bit();
-        w.gpiocen().set_bit();
-        w.gpioden().set_bit();
-        w.gpioeen().set_bit();
-        w.gpiofen().set_bit();
-        w
-    });
-
-    pp.RCC.apb2enr.modify(|_, w| {
-        w.syscfgen().set_bit();
-        w
-    });
+        pac::RCC.ahb1enr().modify(|w| {
+            w.set_dmamux1en(true);
+            w.set_dma1en(true);
+            w.set_dma2en(true);
+        });
 
+        pac::RCC.ahb2enr().modify(|w| {
+            w.set_gpioaen(true);
+            w.set_gpioben(true);
+            w.set_gpiocen(true);
+            w.set_gpioden(true);
+            w.set_gpioeen(true);
+            w.set_gpiofen(true);
+        });
+    }
 
     unsafe { embassy::time::set_clock(&ZeroClock) };