diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d46aff..773aa5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [unreleased]
 
+## [v0.3.0]
+
+- Update `embedded-hal` to v1.
+- Add optional `defmt` feature.
+
 ## [v0.2.1]
 
 - README tweaks
diff --git a/Cargo.toml b/Cargo.toml
index 7f786b3..519dbd6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "max116xx-10bit"
-version = "0.2.1"
+version = "0.3.0"
 authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]
 edition = "2021"
 description = "Driver crate for the MAX116xx 10-bit ADC devices"
@@ -12,5 +12,6 @@ categories = ["embedded", "no-std", "hardware-support"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-embedded-hal = { version = "0.2.6", features = ["unproven"] }
-nb = "1.0.0"
+embedded-hal = "1"
+nb = "1"
+defmt = { version = "0.3", optional =  true }
diff --git a/src/lib.rs b/src/lib.rs
index 5421eae..903e423 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,12 +22,9 @@
 //! using a [thin abstraction layer](https://egit.irs.uni-stuttgart.de/rust/vorago-reb1/src/branch/main/src/max11619.rs)
 #![no_std]
 use core::{marker::PhantomData, slice::IterMut};
-use embedded_hal::{
-    blocking::delay::DelayUs,
-    blocking::spi::Transfer,
-    digital::v2::{InputPin, OutputPin},
-    spi::FullDuplex,
-};
+use embedded_hal::delay::DelayNs;
+use embedded_hal::digital::{InputPin, OutputPin};
+use embedded_hal::spi::SpiDevice;
 
 //==================================================================================================
 // Type-level support
@@ -90,15 +87,15 @@ impl HasChannels for Max11625 {
     const NUM: u8 = 16;
 }
 
-pub trait Clocked: private::Sealed {
+pub trait ClockedProvider: private::Sealed {
     const CLK_SEL: ClockMode;
 }
 
-pub trait InternallyClocked: Clocked {}
+pub trait InternallyClocked: ClockedProvider {}
 
 pub struct InternallyClockedInternallyTimedCnvst {}
 impl private::Sealed for InternallyClockedInternallyTimedCnvst {}
-impl Clocked for InternallyClockedInternallyTimedCnvst {
+impl ClockedProvider for InternallyClockedInternallyTimedCnvst {
     const CLK_SEL: ClockMode = ClockMode::InternalClockInternallyTimedCnvst;
 }
 impl InternallyClocked for InternallyClockedInternallyTimedCnvst {}
@@ -106,7 +103,7 @@ type IntClkdIntTmdCnvst = InternallyClockedInternallyTimedCnvst;
 
 pub struct InternallyClockedExternallyTimedCnvst {}
 impl private::Sealed for InternallyClockedExternallyTimedCnvst {}
-impl Clocked for InternallyClockedExternallyTimedCnvst {
+impl ClockedProvider for InternallyClockedExternallyTimedCnvst {
     const CLK_SEL: ClockMode = ClockMode::InternalClockExternallyTimedCnvst;
 }
 impl InternallyClocked for InternallyClockedExternallyTimedCnvst {}
@@ -114,7 +111,7 @@ type IntClkdExtTmdCnvst = InternallyClockedExternallyTimedCnvst;
 
 pub struct InternallyClockedInternallyTimedSerialInterface {}
 impl private::Sealed for InternallyClockedInternallyTimedSerialInterface {}
-impl Clocked for InternallyClockedInternallyTimedSerialInterface {
+impl ClockedProvider for InternallyClockedInternallyTimedSerialInterface {
     const CLK_SEL: ClockMode = ClockMode::InternalClockInternallyTimedSerialInterface;
 }
 impl InternallyClocked for InternallyClockedInternallyTimedSerialInterface {}
@@ -122,7 +119,7 @@ type IntClkdIntTmdSerIF = InternallyClockedInternallyTimedSerialInterface;
 
 pub struct ExternallyClocked {}
 impl private::Sealed for ExternallyClocked {}
-impl Clocked for ExternallyClocked {
+impl ClockedProvider for ExternallyClocked {
     const CLK_SEL: ClockMode = ClockMode::ExternalClockExternallyTimedSclk;
 }
 type ExtClkd = ExternallyClocked;
@@ -133,6 +130,7 @@ type ExtClkd = ExternallyClocked;
 
 /// Clock modes for the MAX116XX devices
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum ClockMode {
     /// Internally timed, CNVST only needs to be pulsed for 40ns.
     /// CNVST Configuration: CNVST active low
@@ -149,6 +147,7 @@ pub enum ClockMode {
 
 /// Voltage reference modes
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum VoltageRefMode {
     /// Auto-Shutdown is on, wake-up delay of 65 us
     InternalRefWithWakeupDelay = 0b00,
@@ -158,6 +157,7 @@ pub enum VoltageRefMode {
 
 /// Specifies how many conversions are performed and then averaged for each
 /// requested result
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum AveragingConversions {
     OneConversion = 0b000,
     FourConversions = 0b100,
@@ -168,6 +168,7 @@ pub enum AveragingConversions {
 
 /// Specifies the number of returned result in single scan mode
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum AveragingResults {
     FourResults = 0b00,
     EightResults = 0b01,
@@ -176,6 +177,7 @@ pub enum AveragingResults {
 }
 
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum ScanMode {
     Scan0ToChannelN = 0b00,
     ScanChannelNToHighest = 0b01,
@@ -184,6 +186,7 @@ pub enum ScanMode {
 }
 
 #[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum AdcError {
     InvalidChannel,
     InvalidRefMode,
@@ -208,6 +211,8 @@ impl<SpiE, PinE> From<AdcError> for Error<SpiE, PinE> {
     }
 }
 
+#[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 struct InternalCfg {
     clk_mode: ClockMode,
     ref_mode: VoltageRefMode,
@@ -216,16 +221,17 @@ struct InternalCfg {
     results_len: u8,
     requested_conversions: usize,
 }
+
 //==================================================================================================
 // ADC implementation
 //==================================================================================================
 
-pub struct Max116xx10Bit<SPI, CS, CLOCKED = ExtClkd, WAKEUP = WithoutWakeupDelay> {
-    spi: SPI,
-    cs: CS,
+pub struct Max116xx10Bit<Spi, Cs, Clocked = ExtClkd, Wakeup = WithoutWakeupDelay> {
+    spi: Spi,
+    cs: Cs,
     cfg: InternalCfg,
-    clocked: PhantomData<CLOCKED>,
-    delay: PhantomData<WAKEUP>,
+    clocked: PhantomData<Clocked>,
+    delay: PhantomData<Wakeup>,
 }
 
 pub struct Max116xx10BitEocExt<SPI, CS, EOC, CLOCKED> {
@@ -243,27 +249,23 @@ pub struct Max116xx10BitCnvstEocExt<SPI, CS, EOC, CNVST, CLOCKED, WAKEUP = Witho
 // Generic
 //==================================================================================================
 
-impl<SpiE, PinE, CS, SPI> Max116xx10Bit<SPI, CS, ExtClkd, WithoutWakeupDelay>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
-{
-    pub fn max11618(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+impl<Cs: OutputPin, Spi: SpiDevice> Max116xx10Bit<Spi, Cs, ExtClkd, WithoutWakeupDelay> {
+    pub fn max11618(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         Self::new::<Max11618>(spi, cs)
     }
-    pub fn max11619(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+    pub fn max11619(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         Self::new::<Max11619>(spi, cs)
     }
-    pub fn max11620(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+    pub fn max11620(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         Self::new::<Max11620>(spi, cs)
     }
-    pub fn max11621(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+    pub fn max11621(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         Self::new::<Max11621>(spi, cs)
     }
-    pub fn max11624(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+    pub fn max11624(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         Self::new::<Max11624>(spi, cs)
     }
-    pub fn max11625(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+    pub fn max11625(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         Self::new::<Max11625>(spi, cs)
     }
 
@@ -274,7 +276,7 @@ where
     ///
     /// The corresponding SETUP register is `0b0111_0100`
     /// Please note that you still might have to reset and setup the ADC.
-    pub fn new<MAX: HasChannels>(spi: SPI, cs: CS) -> Result<Self, Error<SpiE, PinE>> {
+    pub fn new<MAX: HasChannels>(spi: Spi, cs: Cs) -> Result<Self, Error<Spi::Error, Cs::Error>> {
         let max_dev = Max116xx10Bit {
             spi,
             cs,
@@ -298,7 +300,7 @@ where
     /// The corresponding SETUP register is `0b0111_0000`
     pub fn into_ext_clkd_with_int_ref_wakeup_delay(
         self,
-    ) -> Max116xx10Bit<SPI, CS, ExtClkd, WithWakeupDelay> {
+    ) -> Max116xx10Bit<Spi, Cs, ExtClkd, WithWakeupDelay> {
         Max116xx10Bit {
             spi: self.spi,
             cs: self.cs,
@@ -321,7 +323,7 @@ where
     /// The corresponding SETUP register is `0b0111_1000`
     pub fn into_ext_clkd_with_int_ref_no_wakeup_delay(
         self,
-    ) -> Max116xx10Bit<SPI, CS, ExtClkd, WithoutWakeupDelay> {
+    ) -> Max116xx10Bit<Spi, Cs, ExtClkd, WithoutWakeupDelay> {
         Max116xx10Bit {
             spi: self.spi,
             cs: self.cs,
@@ -342,10 +344,10 @@ where
     /// and a wakeup delay. This can be used to reduce power consumption
     ///
     /// The corresponding SETUP register is `0b0110_1100`
-    pub fn into_int_clkd_int_timed_through_ser_if_with_wakeup<EOC: InputPin<Error = PinE>>(
+    pub fn into_int_clkd_int_timed_through_ser_if_with_wakeup<Eoc: InputPin>(
         self,
-        eoc: EOC,
-    ) -> Max116xx10BitEocExt<SPI, CS, EOC, IntClkdIntTmdSerIF> {
+        eoc: Eoc,
+    ) -> Max116xx10BitEocExt<Spi, Cs, Eoc, IntClkdIntTmdSerIF> {
         Max116xx10BitEocExt {
             base: Max116xx10Bit {
                 spi: self.spi,
@@ -371,11 +373,11 @@ where
     /// The corresponding SETUP register can be one of the two
     ///  - External Voltage reference: `0b0110_0100`
     ///  - Internal Voltage reference always on: `0b0110_1000`
-    pub fn into_int_clkd_int_timed_through_ser_if_without_wakeup<EOC: InputPin<Error = PinE>>(
+    pub fn into_int_clkd_int_timed_through_ser_if_without_wakeup<Eoc: InputPin>(
         self,
         v_ref: VoltageRefMode,
-        eoc: EOC,
-    ) -> Result<Max116xx10BitEocExt<SPI, CS, EOC, IntClkdIntTmdSerIF>, AdcError> {
+        eoc: Eoc,
+    ) -> Result<Max116xx10BitEocExt<Spi, Cs, Eoc, IntClkdIntTmdSerIF>, AdcError> {
         if v_ref == VoltageRefMode::InternalRefWithWakeupDelay {
             return Err(AdcError::InvalidRefMode);
         }
@@ -399,22 +401,20 @@ where
     }
 }
 
-impl<SpiE, PinE, CS, SPI, CLOCKED: Clocked, WAKEUP> Max116xx10Bit<SPI, CS, CLOCKED, WAKEUP>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
+impl<Cs: OutputPin, Spi: SpiDevice, Clocked: ClockedProvider, Wakeup>
+    Max116xx10Bit<Spi, Cs, Clocked, Wakeup>
 {
     #[inline]
-    fn send_wrapper(&mut self, byte: u8) -> Result<(), Error<SpiE, PinE>> {
+    fn send_wrapper(&mut self, byte: u8) -> Result<(), Error<Spi::Error, Cs::Error>> {
         self.cs.set_low().map_err(Error::Pin)?;
-        nb::block!(self.spi.send(byte)).map_err(Error::Spi)?;
+        self.spi.write(&[byte]).map_err(Error::Spi)?;
         self.cs.set_high().map_err(Error::Pin)?;
         Ok(())
     }
 
     /// Set up the ADC depending on clock and reference configuration
     #[inline]
-    pub fn setup(&mut self) -> Result<(), Error<SpiE, PinE>> {
+    pub fn setup(&mut self) -> Result<(), Error<Spi::Error, Cs::Error>> {
         self.send_wrapper(self.get_setup_byte())
     }
 
@@ -425,13 +425,13 @@ where
         &mut self,
         avg_conv: AveragingConversions,
         avg_res: AveragingResults,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, Cs::Error>> {
         self.cfg.results_len = Self::get_results_len(avg_res);
         self.send_wrapper(Self::get_averaging_byte(avg_conv, avg_res))
     }
 
     #[inline]
-    pub fn reset(&mut self, fifo_only: bool) -> Result<(), Error<SpiE, PinE>> {
+    pub fn reset(&mut self, fifo_only: bool) -> Result<(), Error<Spi::Error, Cs::Error>> {
         let mut reset_byte = 0b0001_0000;
         if fifo_only {
             reset_byte |= 1 << 3;
@@ -468,24 +468,24 @@ where
 
     /// Generic function which can be used a single result is available
     /// when EOC is low
-    fn internal_read_single_channel<EOC: InputPin<Error = PinE>>(
+    fn internal_read_single_channel<Eoc: InputPin<Error = Cs::Error>>(
         &mut self,
-        eoc: &mut EOC,
-    ) -> nb::Result<u16, Error<SpiE, PinE>> {
+        eoc: &mut Eoc,
+    ) -> nb::Result<u16, Error<Spi::Error, Cs::Error>> {
         if self.cfg.pending_scan_mode.is_none() {
             return Err(nb::Error::Other(Error::Adc(AdcError::NoPendingOperation)));
         } else if self.cfg.pending_scan_mode != Some(ScanMode::ConvertChannelNOnce) {
             return Err(nb::Error::Other(Error::Adc(AdcError::PendingOperation)));
         }
         if eoc.is_low().map_err(Error::Pin)? {
-            let mut dummy_cmd: [u8; 2] = [0; 2];
+            let mut reply_buf: [u8; 2] = [0; 2];
             self.cs.set_low().map_err(Error::Pin)?;
-            let transfer_result = self.spi.transfer(&mut dummy_cmd);
+            let transfer_result = self.spi.read(&mut reply_buf);
             self.cs.set_high().map_err(Error::Pin)?;
             match transfer_result {
-                Ok(reply) => {
+                Ok(_) => {
                     self.cfg.pending_scan_mode = None;
-                    Ok(((reply[0] as u16) << 6) | (reply[1] as u16 >> 2))
+                    Ok(((reply_buf[0] as u16) << 6) | (reply_buf[1] as u16 >> 2))
                 }
                 Err(e) => Err(nb::Error::Other(Error::Spi(e))),
             }
@@ -499,7 +499,7 @@ macro_rules! ext_impl {
     () => {
         /// Set up the ADC depending on clock and reference configuration
         #[inline]
-        pub fn setup(&mut self) -> Result<(), Error<SpiE, PinE>> {
+        pub fn setup(&mut self) -> Result<(), Error<Spi::Error, Cs::Error>> {
             self.base.send_wrapper(self.base.get_setup_byte())
         }
 
@@ -510,16 +510,16 @@ macro_rules! ext_impl {
             &mut self,
             avg_conv: AveragingConversions,
             avg_res: AveragingResults,
-        ) -> Result<(), Error<SpiE, PinE>> {
-            self.base.cfg.results_len = Max116xx10Bit::<SPI, CS, CLOCKED>::get_results_len(avg_res);
+        ) -> Result<(), Error<Spi::Error, Cs::Error>> {
+            self.base.cfg.results_len = Max116xx10Bit::<Spi, Cs, Clocked>::get_results_len(avg_res);
             self.base
-                .send_wrapper(Max116xx10Bit::<SPI, CS, CLOCKED>::get_averaging_byte(
+                .send_wrapper(Max116xx10Bit::<Spi, Cs, Clocked>::get_averaging_byte(
                     avg_conv, avg_res,
                 ))
         }
 
         #[inline]
-        pub fn reset(&mut self, fifo_only: bool) -> Result<(), Error<SpiE, PinE>> {
+        pub fn reset(&mut self, fifo_only: bool) -> Result<(), Error<Spi::Error, Cs::Error>> {
             let mut reset_byte = 0b0001_0000;
             if fifo_only {
                 reset_byte |= 1 << 3;
@@ -528,19 +528,14 @@ macro_rules! ext_impl {
         }
     };
 }
-impl<SpiE, PinE, CS, SPI, EOC, CLOCKED: Clocked> Max116xx10BitEocExt<SPI, CS, EOC, CLOCKED>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
+impl<Cs: OutputPin, Spi: SpiDevice, Eoc, Clocked: ClockedProvider>
+    Max116xx10BitEocExt<Spi, Cs, Eoc, Clocked>
 {
     ext_impl!();
 }
 
-impl<SpiE, PinE, CS, SPI, EOC, CNVST, CLOCKED: Clocked, DELAY>
-    Max116xx10BitCnvstEocExt<SPI, CS, EOC, CNVST, CLOCKED, DELAY>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
+impl<Cs: OutputPin, Spi: SpiDevice, EOC, CNVST, Clocked: ClockedProvider, DELAY>
+    Max116xx10BitCnvstEocExt<Spi, Cs, EOC, CNVST, Clocked, DELAY>
 {
     ext_impl!();
 }
@@ -550,16 +545,12 @@ where
 //==================================================================================================
 
 /// Implementations when using the external SPI clock to time the conversions
-impl<SpiE, PinE, SPI, CS> Max116xx10Bit<SPI, CS, ExtClkd, WithoutWakeupDelay>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
-{
+impl<Spi: SpiDevice, Cs: OutputPin> Max116xx10Bit<Spi, Cs, ExtClkd, WithoutWakeupDelay> {
     pub fn read_single_channel(
         &mut self,
         buf: &mut [u8],
         channel_num: u8,
-    ) -> Result<u16, Error<SpiE, PinE>> {
+    ) -> Result<u16, Error<Spi::Error, Cs::Error>> {
         if buf.len() < 3 {
             return Err(Error::Adc(AdcError::CmdBufTooSmall));
         }
@@ -567,9 +558,9 @@ where
         buf[1] = 0x00;
         buf[2] = 0x00;
         self.cs.set_low().map_err(Error::Pin)?;
-        let reply = self.spi.transfer(&mut buf[0..3]).ok().unwrap();
+        self.spi.transfer_in_place(&mut buf[0..3]).ok().unwrap();
         self.cs.set_high().map_err(Error::Pin)?;
-        Ok(((reply[1] as u16) << 6) | (reply[2] as u16 >> 2))
+        Ok(((buf[1] as u16) << 6) | (buf[2] as u16 >> 2))
     }
 
     pub fn read_multiple_channels_0_to_n(
@@ -577,7 +568,7 @@ where
         buf: &mut [u8],
         result_iter: &mut IterMut<u16>,
         n: u8,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, Cs::Error>> {
         let mut iter = buf.iter_mut();
         let mut next_byte: &mut u8;
         for idx in 0..n + 1 {
@@ -589,12 +580,11 @@ where
         next_byte = iter.next().ok_or(Error::Adc(AdcError::CmdBufTooSmall))?;
         *next_byte = 0x00;
         self.cs.set_low().map_err(Error::Pin)?;
-        let reply = self
-            .spi
-            .transfer(&mut buf[0..((n + 1) * 2 + 1) as usize])
+        self.spi
+            .transfer_in_place(&mut buf[0..((n + 1) * 2 + 1) as usize])
             .map_err(Error::Spi)?;
         self.cs.set_high().map_err(Error::Pin)?;
-        let mut reply_iter = reply.iter();
+        let mut reply_iter = buf.iter();
         // Skip first reply byte
         reply_iter.next().unwrap();
         for _ in 0..n + 1 {
@@ -612,7 +602,7 @@ where
         buf: &mut [u8],
         result_iter: &mut IterMut<u16>,
         n: u8,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, Cs::Error>> {
         let mut iter = buf.iter_mut();
         let mut next_byte: &mut u8;
         if n > self.cfg.max_channels - 1 {
@@ -628,12 +618,11 @@ where
         next_byte = iter.next().ok_or(Error::Adc(AdcError::CmdBufTooSmall))?;
         *next_byte = 0x00;
         self.cs.set_low().map_err(Error::Pin)?;
-        let reply = self
-            .spi
-            .transfer(&mut buf[0..(conversions * 2 + 1) as usize])
+        self.spi
+            .transfer_in_place(&mut buf[0..(conversions * 2 + 1) as usize])
             .map_err(Error::Spi)?;
         self.cs.set_high().map_err(Error::Pin)?;
-        let mut reply_iter = reply.iter();
+        let mut reply_iter = buf.iter();
         // Skip first reply byte
         reply_iter.next().unwrap();
         for _ in 0..conversions {
@@ -649,17 +638,13 @@ where
 
 /// Implementations when using the external SPI clock to time the conversions but also requiring
 /// a wakeup delay
-impl<SpiE, PinE, SPI, CS> Max116xx10Bit<SPI, CS, ExtClkd, WithWakeupDelay>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
-{
-    pub fn read_single_channel<DELAY: DelayUs<u8>>(
+impl<Spi: SpiDevice, Cs: OutputPin> Max116xx10Bit<Spi, Cs, ExtClkd, WithWakeupDelay> {
+    pub fn read_single_channel<Delay: DelayNs>(
         &mut self,
         buf: &mut [u8],
         channel_num: u8,
-        delay: &mut DELAY,
-    ) -> Result<u16, Error<SpiE, PinE>> {
+        delay: &mut Delay,
+    ) -> Result<u16, Error<Spi::Error, Cs::Error>> {
         if buf.len() < 3 {
             return Err(Error::Adc(AdcError::CmdBufTooSmall));
         }
@@ -671,18 +656,20 @@ where
         buf[0] = 0x00;
         buf[1] = 0x00;
         self.cs.set_low().map_err(Error::Pin)?;
-        let reply = self.spi.transfer(&mut buf[0..2]).map_err(Error::Spi)?;
+        self.spi
+            .transfer_in_place(&mut buf[0..2])
+            .map_err(Error::Spi)?;
         self.cs.set_high().map_err(Error::Pin)?;
-        Ok(((reply[0] as u16) << 6) | (reply[1] as u16 >> 2))
+        Ok(((buf[0] as u16) << 6) | (buf[1] as u16 >> 2))
     }
 
-    pub fn read_multiple_channels_0_to_n<DELAY: DelayUs<u8>>(
+    pub fn read_multiple_channels_0_to_n<Delay: DelayNs>(
         &mut self,
         buf: &mut [u8],
         result_iter: &mut IterMut<u16>,
         n: u8,
-        delay: &mut DELAY,
-    ) -> Result<(), Error<SpiE, PinE>> {
+        delay: &mut Delay,
+    ) -> Result<(), Error<Spi::Error, Cs::Error>> {
         let mut iter = buf.iter_mut();
         let mut next_byte: &mut u8;
         for idx in 0..n + 1 {
@@ -698,12 +685,11 @@ where
         delay.delay_us(65);
 
         self.cs.set_low().map_err(Error::Pin)?;
-        let reply = self
-            .spi
-            .transfer(&mut buf[1..((n + 1) * 2 + 1) as usize])
+        self.spi
+            .transfer_in_place(&mut buf[1..((n + 1) * 2 + 1) as usize])
             .map_err(Error::Spi)?;
         self.cs.set_high().map_err(Error::Pin)?;
-        let mut reply_iter = reply.iter();
+        let mut reply_iter = buf.iter();
         for _ in 0..n + 1 {
             let next_res = result_iter
                 .next()
@@ -714,13 +700,13 @@ where
         Ok(())
     }
 
-    pub fn read_multiple_channels_n_to_highest<DELAY: DelayUs<u8>>(
+    pub fn read_multiple_channels_n_to_highest<Delay: DelayNs>(
         &mut self,
         buf: &mut [u8],
         result_iter: &mut IterMut<u16>,
         n: u8,
-        delay: &mut DELAY,
-    ) -> Result<(), Error<SpiE, PinE>> {
+        delay: &mut Delay,
+    ) -> Result<(), Error<Spi::Error, Cs::Error>> {
         let mut iter = buf.iter_mut();
         let mut next_byte: &mut u8;
         if n > self.cfg.max_channels - 1 {
@@ -740,12 +726,11 @@ where
         self.send_wrapper(buf[0])?;
         delay.delay_us(65);
         self.cs.set_low().map_err(Error::Pin)?;
-        let reply = self
-            .spi
-            .transfer(&mut buf[1..(conversions * 2 + 1) as usize])
+        self.spi
+            .transfer_in_place(&mut buf[1..(conversions * 2 + 1) as usize])
             .map_err(Error::Spi)?;
         self.cs.set_high().map_err(Error::Pin)?;
-        let mut reply_iter = reply.iter();
+        let mut reply_iter = buf.iter();
         for _ in 0..conversions {
             let next_res = result_iter
                 .next()
@@ -763,18 +748,15 @@ where
 
 /// Implementations when using the internal clock with a conversion started
 /// through the serial interface
-impl<SpiE, PinE, SPI, CS, EOC> Max116xx10BitEocExt<SPI, CS, EOC, IntClkdIntTmdSerIF>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
-    EOC: InputPin<Error = PinE>,
+impl<Spi: SpiDevice, Cs: OutputPin<Error = PinE>, Eoc: InputPin<Error = PinE>, PinE>
+    Max116xx10BitEocExt<Spi, Cs, Eoc, IntClkdIntTmdSerIF>
 {
     #[inline]
     fn request_wrapper(
         &mut self,
         channel_num: u8,
         scan_mode: ScanMode,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, Cs::Error>> {
         if self.base.cfg.pending_scan_mode.is_some() {
             return Err(Error::Adc(AdcError::PendingOperation));
         }
@@ -787,7 +769,10 @@ where
         Ok(())
     }
 
-    pub fn request_single_channel(&mut self, channel_num: u8) -> Result<(), Error<SpiE, PinE>> {
+    pub fn request_single_channel(
+        &mut self,
+        channel_num: u8,
+    ) -> Result<(), Error<Spi::Error, PinE>> {
         self.request_wrapper(channel_num, ScanMode::ConvertChannelNOnce)
     }
 
@@ -797,11 +782,14 @@ where
     pub fn request_channel_n_repeatedly(
         &mut self,
         channel_num: u8,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, PinE>> {
         self.request_wrapper(channel_num, ScanMode::ScanChannelNRepeatedly)
     }
 
-    pub fn request_multiple_channels_0_to_n(&mut self, n: u8) -> Result<(), Error<SpiE, PinE>> {
+    pub fn request_multiple_channels_0_to_n(
+        &mut self,
+        n: u8,
+    ) -> Result<(), Error<Spi::Error, PinE>> {
         self.base.cfg.requested_conversions = n as usize + 1;
         self.request_wrapper(n, ScanMode::Scan0ToChannelN)
     }
@@ -809,7 +797,7 @@ where
     pub fn request_multiple_channels_n_to_highest(
         &mut self,
         n: u8,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, PinE>> {
         self.base.cfg.requested_conversions = self.base.cfg.max_channels as usize + 1 - n as usize;
         self.request_wrapper(n, ScanMode::ScanChannelNToHighest)
     }
@@ -818,7 +806,7 @@ where
     /// needs to be passed explicitely here.
     /// If no request was made, [AdcError::NoPendingOperation] is returned.
     /// If a request was made for multipel results, [AdcError::PendingOperation] will be returned.
-    pub fn get_single_channel(&mut self) -> nb::Result<u16, Error<SpiE, PinE>> {
+    pub fn get_single_channel(&mut self) -> nb::Result<u16, Error<Spi::Error, Cs::Error>> {
         self.base.internal_read_single_channel(&mut self.eoc)
     }
 
@@ -828,7 +816,7 @@ where
     pub fn get_multi_channel(
         &mut self,
         result_iter: &mut IterMut<u16>,
-    ) -> nb::Result<(), Error<SpiE, PinE>> {
+    ) -> nb::Result<(), Error<Spi::Error, Cs::Error>> {
         if self.base.cfg.pending_scan_mode.is_none() {
             return Err(nb::Error::Other(Error::Adc(AdcError::NoPendingOperation)));
         } else if self.base.cfg.pending_scan_mode == Some(ScanMode::ConvertChannelNOnce) {
@@ -836,7 +824,7 @@ where
         }
         if self.eoc.is_low().map_err(Error::Pin)? {
             // maximum length of reply is 32 for 16 channels
-            let mut dummy_cmd: [u8; 32] = [0; 32];
+            let mut reply_buf: [u8; 32] = [0; 32];
             let num_conv: usize =
                 if self.base.cfg.pending_scan_mode == Some(ScanMode::ScanChannelNRepeatedly) {
                     self.base.cfg.results_len as usize
@@ -846,22 +834,20 @@ where
             self.base.cfg.pending_scan_mode = None;
             self.base.cfg.requested_conversions = 0;
             self.base.cs.set_low().map_err(Error::Pin)?;
-            let transfer_result = self.base.spi.transfer(&mut dummy_cmd[0..(num_conv * 2)]);
+            self.base
+                .spi
+                .read(&mut reply_buf[0..(num_conv * 2)])
+                .map_err(Error::Spi)?;
             self.base.cs.set_high().map_err(Error::Pin)?;
-            match transfer_result {
-                Ok(reply) => {
-                    let mut reply_iter = reply.iter();
-                    for _ in 0..num_conv {
-                        let next_res = result_iter
-                            .next()
-                            .ok_or(Error::Adc(AdcError::ResulBufTooSmall))?;
-                        *next_res = ((*reply_iter.next().unwrap() as u16) << 6)
-                            | (*reply_iter.next().unwrap() as u16 >> 2);
-                    }
-                    Ok(())
-                }
-                Err(e) => Err(nb::Error::Other(Error::Spi(e))),
+            let mut reply_iter = reply_buf.iter();
+            for _ in 0..num_conv {
+                let next_res = result_iter
+                    .next()
+                    .ok_or(Error::Adc(AdcError::ResulBufTooSmall))?;
+                *next_res = ((*reply_iter.next().unwrap() as u16) << 6)
+                    | (*reply_iter.next().unwrap() as u16 >> 2);
             }
+            Ok(())
         } else {
             Err(nb::Error::WouldBlock)
         }
@@ -877,17 +863,9 @@ where
 ///
 /// TODO: Implement. Unfortunately, the test board used to verify this library did not have
 /// the CNVST connected, so I wouldn't be able to test an implementation easily.
-impl<SpiE, PinE, SPI, CS, EOC, CNVST>
-    Max116xx10BitCnvstEocExt<SPI, CS, EOC, CNVST, IntClkdExtTmdCnvst, WithoutWakeupDelay>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
-    EOC: InputPin<Error = PinE>,
-    CNVST: OutputPin<Error = PinE>,
+impl<Spi: SpiDevice, Cs: OutputPin, Eoc: InputPin, Cnvst: OutputPin>
+    Max116xx10BitCnvstEocExt<Spi, Cs, Eoc, Cnvst, IntClkdExtTmdCnvst, WithoutWakeupDelay>
 {
-    pub fn dummy() {
-        todo!("Implement this")
-    }
 }
 
 /// Implementations when using the internal clock where CNVST is only pulsed to start acquisition
@@ -895,13 +873,13 @@ where
 ///
 /// TODO: Test. Unfortunately, the test board used to verify this library did not have
 /// the CNVST connected, so I wouldn't be able to test an implementation easily.
-impl<SpiE, PinE, SPI, CS, EOC, CNVST>
-    Max116xx10BitCnvstEocExt<SPI, CS, EOC, CNVST, IntClkdIntTmdCnvst, WithWakeupDelay>
-where
-    SPI: Transfer<u8, Error = SpiE> + FullDuplex<u8, Error = SpiE>,
-    CS: OutputPin<Error = PinE>,
-    EOC: InputPin<Error = PinE>,
-    CNVST: OutputPin<Error = PinE>,
+impl<
+        Spi: SpiDevice,
+        Cs: OutputPin<Error = PinE>,
+        Eoc: InputPin<Error = PinE>,
+        Cnvst: OutputPin<Error = PinE>,
+        PinE,
+    > Max116xx10BitCnvstEocExt<Spi, Cs, Eoc, Cnvst, IntClkdIntTmdCnvst, WithWakeupDelay>
 {
     /// The pulse needs to be at least 40ns. A pulse cycle value can be used to increase
     /// the width of the pulse
@@ -909,7 +887,7 @@ where
         &mut self,
         channel_num: u8,
         pulse_cycles: u8,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, PinE>> {
         self.request_wrapper(channel_num, ScanMode::ConvertChannelNOnce, pulse_cycles)
     }
 
@@ -919,7 +897,7 @@ where
         channel_num: u8,
         scan_mode: ScanMode,
         pulse_cycles: u8,
-    ) -> Result<(), Error<SpiE, PinE>> {
+    ) -> Result<(), Error<Spi::Error, PinE>> {
         if self.base.cfg.pending_scan_mode.is_some() {
             return Err(Error::Adc(AdcError::PendingOperation));
         }
@@ -935,7 +913,7 @@ where
         Ok(())
     }
 
-    pub fn get_single_channel(&mut self) -> nb::Result<u16, Error<SpiE, PinE>> {
+    pub fn get_single_channel(&mut self) -> nb::Result<u16, Error<Spi::Error, PinE>> {
         self.base.internal_read_single_channel(&mut self.eoc)
     }
 }