diff --git a/src/dma/mod.rs b/src/dma/mod.rs
index 3f3d3be9..d7a311bb 100644
--- a/src/dma/mod.rs
+++ b/src/dma/mod.rs
@@ -6,12 +6,6 @@ use cortex_m::peripheral::NVIC;
 
 use crate::{peripherals::ETHERNET_DMA, stm32::Interrupt};
 
-#[cfg(feature = "f-series")]
-type ETHERNET_MTL = ();
-
-#[cfg(feature = "stm32h7xx-hal")]
-use crate::stm32::ETHERNET_MTL;
-
 #[cfg(feature = "smoltcp-phy")]
 mod smoltcp_phy;
 #[cfg(feature = "smoltcp-phy")]
@@ -77,7 +71,7 @@ pub struct EthernetDMA<'rx, 'tx> {
 pub(crate) struct DmaParts {
     pub eth_dma: ETHERNET_DMA,
     #[cfg(feature = "stm32h7xx-hal")]
-    pub eth_mtl: ETHERNET_MTL,
+    pub eth_mtl: crate::stm32::ETHERNET_MTL,
 }
 
 impl<'rx, 'tx> EthernetDMA<'rx, 'tx> {
diff --git a/src/dma/rx/f_series_desc.rs b/src/dma/rx/f_series_desc.rs
index f33f90b7..70cf85d9 100644
--- a/src/dma/rx/f_series_desc.rs
+++ b/src/dma/rx/f_series_desc.rs
@@ -59,8 +59,7 @@ impl RxDescriptor {
     }
 
     pub(super) fn setup(&mut self, buffer: &mut [u8]) {
-        self.set_buffer(buffer);
-        self.set_owned();
+        self.set_owned(buffer);
     }
 
     /// Is owned by the DMA engine?
@@ -71,7 +70,9 @@ impl RxDescriptor {
     /// Pass ownership to the DMA engine
     ///
     /// Overrides old timestamp data
-    pub(super) fn set_owned(&mut self) {
+    pub(super) fn set_owned(&mut self, buffer: &mut [u8]) {
+        self.set_buffer(buffer);
+
         // "Preceding reads and writes cannot be moved past subsequent writes."
         #[cfg(feature = "fence")]
         atomic::fence(Ordering::Release);
@@ -125,11 +126,15 @@ impl RxDescriptor {
         ((self.inner_raw.read(0) >> RXDESC_0_FL_SHIFT) & RXDESC_0_FL_MASK) as usize
     }
 
-    pub(super) fn take_received(&mut self, packet_id: Option<PacketId>) -> Result<(), RxError> {
+    pub(super) fn take_received(
+        &mut self,
+        packet_id: Option<PacketId>,
+        buffer: &mut [u8],
+    ) -> Result<(), RxError> {
         if self.is_owned() {
             Err(RxError::WouldBlock)
         } else if self.has_error() {
-            self.set_owned();
+            self.set_owned(buffer);
             Err(RxError::DmaError)
         } else if self.is_first() && self.is_last() {
             // "Subsequent reads and writes cannot be moved ahead of preceding reads."
@@ -143,7 +148,7 @@ impl RxDescriptor {
 
             Ok(())
         } else {
-            self.set_owned();
+            self.set_owned(buffer);
             Err(RxError::Truncated)
         }
     }
@@ -151,14 +156,14 @@ impl RxDescriptor {
     pub(super) fn set_end_of_ring(&mut self) {
         unsafe { self.inner_raw.modify(1, |w| w | RXDESC_1_RER) }
     }
+}
 
+#[cfg(feature = "ptp")]
+impl RxDescriptor {
     pub(super) fn packet_id(&self) -> Option<&PacketId> {
         self.packet_id.as_ref()
     }
-}
 
-#[cfg(feature = "ptp")]
-impl RxDescriptor {
     /// Get PTP timestamps if available
     pub(super) fn read_timestamp(&self) -> Option<Timestamp> {
         #[cfg(not(feature = "stm32f1xx-hal"))]
diff --git a/src/dma/rx/h_desc.rs b/src/dma/rx/h_desc.rs
index 0a4898a7..567e17aa 100644
--- a/src/dma/rx/h_desc.rs
+++ b/src/dma/rx/h_desc.rs
@@ -136,11 +136,12 @@ impl RxDescriptor {
     }
 
     pub(super) fn setup(&mut self, buffer: &[u8]) {
-        self.set_owned(buffer.as_ptr());
+        self.set_owned(buffer);
     }
 
     /// Pass ownership to the DMA engine
-    pub(super) fn set_owned(&mut self, buffer: *const u8) {
+    pub(super) fn set_owned(&mut self, buffer: &[u8]) {
+        let buffer = buffer.as_ptr();
         self.set_buffer(buffer);
 
         // "Preceding reads and writes cannot be moved past subsequent writes."
@@ -205,7 +206,7 @@ impl RxDescriptor {
 
             Ok(())
         } else {
-            self.set_owned(buffer.as_ptr());
+            self.set_owned(buffer);
             Err(RxError::Truncated)
         }
     }
diff --git a/src/dma/rx/mod.rs b/src/dma/rx/mod.rs
index cabbb8e8..1cea58de 100644
--- a/src/dma/rx/mod.rs
+++ b/src/dma/rx/mod.rs
@@ -280,7 +280,7 @@ impl<'a> core::ops::DerefMut for RxPacket<'a> {
 
 impl<'a> Drop for RxPacket<'a> {
     fn drop(&mut self) {
-        self.entry.set_owned(self.buffer.as_ptr());
+        self.entry.set_owned(self.buffer);
     }
 }
 
diff --git a/src/dma/tx/f_series_desc.rs b/src/dma/tx/f_series_desc.rs
index 2e3e86aa..2e5debe0 100644
--- a/src/dma/tx/f_series_desc.rs
+++ b/src/dma/tx/f_series_desc.rs
@@ -144,14 +144,14 @@ impl TxDescriptor {
     pub(super) fn set_end_of_ring(&mut self) {
         unsafe { self.inner_raw.modify(0, |w| w | TXDESC_0_TER) };
     }
+}
 
+#[cfg(feature = "ptp")]
+impl TxDescriptor {
     pub(super) fn packet_id(&self) -> Option<&PacketId> {
         self.packet_id.as_ref()
     }
-}
 
-#[cfg(feature = "ptp")]
-impl TxDescriptor {
     fn read_timestamp(&mut self) -> Option<Timestamp> {
         let tdes0 = self.inner_raw.read(0);
 
diff --git a/src/dma/tx/mod.rs b/src/dma/tx/mod.rs
index 6fe8ecc7..5e0db780 100644
--- a/src/dma/tx/mod.rs
+++ b/src/dma/tx/mod.rs
@@ -41,7 +41,7 @@ pub(crate) struct TxRing<'data, STATE> {
 impl<'data, STATE> TxRing<'data, STATE> {
     pub fn running_state(&self, eth_dma: &ETHERNET_DMA) -> RunningState {
         #[cfg(feature = "f-series")]
-        let tx_status = eth_dma.dmasr().read().tps().bits();
+        let tx_status = eth_dma.dmasr.read().tps().bits();
 
         #[cfg(feature = "stm32h7xx-hal")]
         let tx_status = eth_dma.dmadsr.read().tps0().bits();
@@ -97,7 +97,7 @@ impl<'data> TxRing<'data, NotRunning> {
 
         #[cfg(feature = "f-series")]
         // Set end of ring register
-        self.ring.last_descriptor().set_end_of_ring();
+        self.ring.last_descriptor_mut().set_end_of_ring();
 
         let ring_ptr = self.ring.descriptors_start_address();
 
@@ -235,7 +235,7 @@ impl<'data> TxRing<'data, Running> {
 impl<'data> TxRing<'data, Running> {
     pub(crate) fn collect_timestamps(&mut self) {
         for descriptor in self.ring.descriptors_mut() {
-            f_descriptor.attach_timestamp();
+            descriptor.attach_timestamp();
         }
     }
 
@@ -243,12 +243,12 @@ impl<'data> TxRing<'data, Running> {
         let descriptor = if let Some(descriptor) =
             self.ring.descriptors().find(|d| d.packet_id() == Some(&id))
         {
-            f_descriptor
+            descriptor
         } else {
             return Err(TimestampError::IdNotFound);
         };
 
-        f_descriptor
+        descriptor
             .timestamp()
             .map(|t| *t)
             .ok_or(TimestampError::NotYetTimestamped)
diff --git a/src/lib.rs b/src/lib.rs
index ef19fee3..1514b6a2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -111,7 +111,7 @@ where
     // Congfigure and start up the ethernet DMA.
     let dma = EthernetDMA::new(
         DmaParts {
-            eth_dma: parts.dma,
+            eth_dma: parts.dma.into(),
             #[cfg(feature = "stm32h7xx-hal")]
             eth_mtl: parts.mtl,
         },
@@ -195,7 +195,13 @@ where
     let eth_mac = parts.mac.into();
 
     // Congfigure and start up the ethernet DMA.
-    let dma = EthernetDMA::new(parts.dma.into(), rx_buffer, tx_buffer);
+    let dma = EthernetDMA::new(
+        DmaParts {
+            eth_dma: parts.dma.into(),
+        },
+        rx_buffer,
+        tx_buffer,
+    );
 
     // Configure the ethernet PTP
     #[cfg(feature = "ptp")]
@@ -203,7 +209,10 @@ where
 
     // Configure the ethernet MAC
     let mac = EthernetMAC::new(
-        MacParts { eth_mac, eth_mmc },
+        MacParts {
+            eth_mac,
+            eth_mmc: parts.mmc,
+        },
         clocks,
         Speed::FullDuplexBase100Tx,
         &dma,
diff --git a/src/mac/miim.rs b/src/mac/miim.rs
index e6cb0f0e..fdf3c590 100644
--- a/src/mac/miim.rs
+++ b/src/mac/miim.rs
@@ -1,7 +1,8 @@
 pub use ieee802_3_miim::Miim;
-
 pub use ieee802_3_miim::*;
 
+use core::ops::{Deref, DerefMut};
+
 use crate::{peripherals::ETHERNET_MAC, stm32::ethernet_mac::MACMIIAR};
 
 use super::EthernetMAC;
@@ -157,7 +158,7 @@ where
     MDIO: MdioPin,
     MDC: MdcPin,
 {
-    pub(crate) eth_mac: EthernetMAC,
+    eth_mac: EthernetMAC,
     mdio: MDIO,
     mdc: MDC,
 }
@@ -226,7 +227,7 @@ where
     }
 }
 
-impl<MDIO, MDC> miim::Miim for EthernetMACWithMii<MDIO, MDC>
+impl<MDIO, MDC> Miim for EthernetMACWithMii<MDIO, MDC>
 where
     MDIO: MdioPin,
     MDC: MdcPin,
diff --git a/src/mac/mod.rs b/src/mac/mod.rs
index aa6fe9f3..3a5d6bfb 100644
--- a/src/mac/mod.rs
+++ b/src/mac/mod.rs
@@ -10,7 +10,7 @@ pub use miim::*;
 pub(crate) struct MacParts {
     pub eth_mac: ETHERNET_MAC,
     #[cfg(feature = "f-series")]
-    pub eth_mmc: ETHERNET_MMC,
+    pub eth_mmc: crate::stm32::ETHERNET_MMC,
 }
 
 impl MacParts {
@@ -18,7 +18,7 @@ impl MacParts {
         let Self { eth_mac, .. } = self;
 
         #[cfg(feature = "f-series")]
-        let (mac_filter_reg, flow_control) = (&eth_mac.macffr, &eth_mac.macfcr);
+        let (mac_filter, flow_control) = (&eth_mac.macffr, &eth_mac.macfcr);
         #[cfg(feature = "stm32h7xx-hal")]
         let (mac_filter, flow_control) = (&eth_mac.macpfr, &eth_mac.macqtx_fcr);
 
@@ -42,14 +42,9 @@ impl MacParts {
     }
 
     fn disable_mmc_interrupts(&self) {
-        let Self {
-            eth_mac,
-            #[cfg(feature = "f-series")]
-            eth_mmc,
-        } = self;
-
         #[cfg(feature = "f-series")]
         {
+            let eth_mmc = &self.eth_mmc;
             // Disable all MMC RX interrupts
             eth_mmc
                 .mmcrimr
@@ -69,6 +64,8 @@ impl MacParts {
 
         #[cfg(feature = "stm32h7xx-hal")]
         {
+            let eth_mac = &self.eth_mac;
+
             // Disable all MMC RX interrupts
             eth_mac.mmc_rx_interrupt_mask.write(|w| {
                 w.rxlpitrcim()
@@ -163,11 +160,7 @@ impl EthernetMAC {
         // it doesn't work.
         _dma: &EthernetDMA,
     ) -> Result<Self, WrongClock> {
-        let MacParts {
-            eth_mac,
-            #[cfg(feature = "f-series")]
-            eth_mmc,
-        } = &parts;
+        let eth_mac = &parts.eth_mac;
 
         // TODO: configure MDIOS
         #[cfg(feature = "f-series")]
@@ -218,12 +211,7 @@ impl EthernetMAC {
                 .dr()
                 .set_bit();
 
-            // Fast Ethernet speed
-            w.fes()
-                .set_bit()
-                // Duplex mode
-                .dm()
-                .set_bit()
+            w
                 // Receiver enable
                 .re()
                 .set_bit()
@@ -244,6 +232,31 @@ impl EthernetMAC {
         Ok(me)
     }
 
+    /// Set the Ethernet Speed at which the MAC communicates
+    ///
+    /// Note that this does _not_ affect the PHY in any way. To
+    /// configure the PHY, use [`EthernetMACWithMii`] (see: [`Self::with_mii`])
+    /// or [`Stm32Mii`] (see: [`Self::mii`])
+    pub fn set_speed(&mut self, speed: Speed) {
+        self.eth_mac.maccr.modify(|_, w| match speed {
+            Speed::HalfDuplexBase10T => w.fes().clear_bit().dm().clear_bit(),
+            Speed::FullDuplexBase10T => w.fes().clear_bit().dm().set_bit(),
+            Speed::HalfDuplexBase100Tx => w.fes().set_bit().dm().clear_bit(),
+            Speed::FullDuplexBase100Tx => w.fes().set_bit().dm().set_bit(),
+        });
+    }
+
+    /// Get the Ethernet Speed at which the MAC communicates
+    pub fn get_speed(&self) -> Speed {
+        let cr = self.eth_mac.maccr.read();
+        match (cr.fes().bit_is_set(), cr.dm().bit_is_set()) {
+            (false, false) => Speed::HalfDuplexBase10T,
+            (false, true) => Speed::FullDuplexBase10T,
+            (true, false) => Speed::HalfDuplexBase100Tx,
+            (true, true) => Speed::FullDuplexBase100Tx,
+        }
+    }
+
     /// Borrow access to the MAC's SMI.
     ///
     /// Allows for controlling and monitoring any PHYs that may be accessible via the MDIO/MDC
@@ -271,36 +284,7 @@ impl EthernetMAC {
         MDIO: MdioPin,
         MDC: MdcPin,
     {
-        EthernetMACWithMii {
-            eth_mac: self,
-            mdio,
-            mdc,
-        }
-    }
-
-    /// Set the Ethernet Speed at which the MAC communicates
-    ///
-    /// Note that this does _not_ affect the PHY in any way. To
-    /// configure the PHY, use [`EthernetMACWithMii`] (see: [`Self::with_mii`])
-    /// or [`Stm32Mii`] (see: [`Self::mii`])
-    pub fn set_speed(&mut self, speed: Speed) {
-        self.eth_mac.maccr.modify(|_, w| match speed {
-            Speed::HalfDuplexBase10T => w.fes().clear_bit().dm().clear_bit(),
-            Speed::FullDuplexBase10T => w.fes().clear_bit().dm().set_bit(),
-            Speed::HalfDuplexBase100Tx => w.fes().set_bit().dm().clear_bit(),
-            Speed::FullDuplexBase100Tx => w.fes().set_bit().dm().set_bit(),
-        });
-    }
-
-    /// Get the Ethernet Speed at which the MAC communicates
-    pub fn get_speed(&self) -> Speed {
-        let cr = self.eth_mac.maccr.read();
-        match (cr.fes().bit_is_set(), cr.dm().bit_is_set()) {
-            (false, false) => Speed::HalfDuplexBase10T,
-            (false, true) => Speed::FullDuplexBase10T,
-            (true, false) => Speed::HalfDuplexBase100Tx,
-            (true, true) => Speed::FullDuplexBase100Tx,
-        }
+        EthernetMACWithMii::new(self, mdio, mdc)
     }
 
     #[cfg(feature = "ptp")]