diff --git a/embassy-stm32/src/ipcc.rs b/embassy-stm32/src/ipcc.rs
index 2b9caf8e..ea33b32c 100644
--- a/embassy-stm32/src/ipcc.rs
+++ b/embassy-stm32/src/ipcc.rs
@@ -1,5 +1,3 @@
-use embassy_hal_common::{into_ref, Peripheral, PeripheralRef};
-
 use crate::ipcc::sealed::Instance;
 use crate::peripherals::IPCC;
 use crate::rcc::sealed::RccPeripheral;
@@ -29,22 +27,10 @@ pub(crate) mod sealed {
     }
 }
 
-pub struct Ipcc<'d> {
-    _peri: PeripheralRef<'d, IPCC>,
-}
+pub(crate) struct Ipcc;
 
-impl<'d> Ipcc<'d> {
-    pub fn new(peri: impl Peripheral<P = IPCC> + 'd, _config: Config) -> Self {
-        Self::new_inner(peri)
-    }
-
-    pub(crate) fn new_inner(peri: impl Peripheral<P = IPCC> + 'd) -> Self {
-        into_ref!(peri);
-
-        Self { _peri: peri }
-    }
-
-    pub fn init(&mut self) {
+impl Ipcc {
+    pub(crate) fn init(_config: Config) {
         IPCC::enable();
         IPCC::reset();
         IPCC::set_cpu2(true);
@@ -61,56 +47,60 @@ impl<'d> Ipcc<'d> {
         }
     }
 
-    pub fn c1_set_rx_channel(&mut self, channel: IpccChannel, enabled: bool) {
+    pub(crate) fn c1_set_rx_channel(channel: IpccChannel, enabled: bool) {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { regs.cpu(0).mr().modify(|w| w.set_chom(channel as usize, !enabled)) }
     }
 
-    pub fn c1_get_rx_channel(&self, channel: IpccChannel) -> bool {
+    pub(crate) fn c1_get_rx_channel(channel: IpccChannel) -> bool {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { !regs.cpu(0).mr().read().chom(channel as usize) }
     }
 
-    pub fn c2_set_rx_channel(&mut self, channel: IpccChannel, enabled: bool) {
+    #[allow(dead_code)]
+    pub(crate) fn c2_set_rx_channel(channel: IpccChannel, enabled: bool) {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { regs.cpu(1).mr().modify(|w| w.set_chom(channel as usize, !enabled)) }
     }
 
-    pub fn c2_get_rx_channel(&self, channel: IpccChannel) -> bool {
+    #[allow(dead_code)]
+    pub(crate) fn c2_get_rx_channel(channel: IpccChannel) -> bool {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { !regs.cpu(1).mr().read().chom(channel as usize) }
     }
 
-    pub fn c1_set_tx_channel(&mut self, channel: IpccChannel, enabled: bool) {
+    pub(crate) fn c1_set_tx_channel(channel: IpccChannel, enabled: bool) {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, !enabled)) }
     }
 
-    pub fn c1_get_tx_channel(&self, channel: IpccChannel) -> bool {
+    pub(crate) fn c1_get_tx_channel(channel: IpccChannel) -> bool {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { !regs.cpu(0).mr().read().chfm(channel as usize) }
     }
 
-    pub fn c2_set_tx_channel(&mut self, channel: IpccChannel, enabled: bool) {
+    #[allow(dead_code)]
+    pub(crate) fn c2_set_tx_channel(channel: IpccChannel, enabled: bool) {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
         unsafe { regs.cpu(1).mr().modify(|w| w.set_chfm(channel as usize, !enabled)) }
     }
 
-    pub fn c2_get_tx_channel(&self, channel: IpccChannel) -> bool {
+    #[allow(dead_code)]
+    pub(crate) fn c2_get_tx_channel(channel: IpccChannel) -> bool {
         let regs = IPCC::regs();
 
         // If bit is set to 1 then interrupt is disabled
@@ -118,53 +108,51 @@ impl<'d> Ipcc<'d> {
     }
 
     /// clears IPCC receive channel status for CPU1
-    pub fn c1_clear_flag_channel(&mut self, channel: IpccChannel) {
+    pub(crate) fn c1_clear_flag_channel(channel: IpccChannel) {
         let regs = IPCC::regs();
 
         unsafe { regs.cpu(0).scr().write(|w| w.set_chc(channel as usize, true)) }
     }
 
+    #[allow(dead_code)]
     /// clears IPCC receive channel status for CPU2
-    pub fn c2_clear_flag_channel(&mut self, channel: IpccChannel) {
+    pub(crate) fn c2_clear_flag_channel(channel: IpccChannel) {
         let regs = IPCC::regs();
 
         unsafe { regs.cpu(1).scr().write(|w| w.set_chc(channel as usize, true)) }
     }
 
-    pub fn c1_set_flag_channel(&mut self, channel: IpccChannel) {
+    pub(crate) fn c1_set_flag_channel(channel: IpccChannel) {
         let regs = IPCC::regs();
 
         unsafe { regs.cpu(0).scr().write(|w| w.set_chs(channel as usize, true)) }
     }
 
-    pub fn c2_set_flag_channel(&mut self, channel: IpccChannel) {
+    #[allow(dead_code)]
+    pub(crate) fn c2_set_flag_channel(channel: IpccChannel) {
         let regs = IPCC::regs();
 
         unsafe { regs.cpu(1).scr().write(|w| w.set_chs(channel as usize, true)) }
     }
 
-    pub fn c1_is_active_flag(&self, channel: IpccChannel) -> bool {
+    pub(crate) fn c1_is_active_flag(channel: IpccChannel) -> bool {
         let regs = IPCC::regs();
 
         unsafe { regs.cpu(0).sr().read().chf(channel as usize) }
     }
 
-    pub fn c2_is_active_flag(&self, channel: IpccChannel) -> bool {
+    pub(crate) fn c2_is_active_flag(channel: IpccChannel) -> bool {
         let regs = IPCC::regs();
 
         unsafe { regs.cpu(1).sr().read().chf(channel as usize) }
     }
 
-    pub fn is_tx_pending(&self, channel: IpccChannel) -> bool {
-        !self.c1_is_active_flag(channel) && self.c1_get_tx_channel(channel)
+    pub(crate) fn is_tx_pending(channel: IpccChannel) -> bool {
+        !Self::c1_is_active_flag(channel) && Self::c1_get_tx_channel(channel)
     }
 
-    pub fn is_rx_pending(&self, channel: IpccChannel) -> bool {
-        self.c2_is_active_flag(channel) && self.c1_get_rx_channel(channel)
-    }
-
-    pub fn as_mut_ptr(&self) -> *mut Self {
-        unsafe { &mut core::ptr::read(self) as *mut _ }
+    pub(crate) fn is_rx_pending(channel: IpccChannel) -> bool {
+        Self::c2_is_active_flag(channel) && Self::c1_get_rx_channel(channel)
     }
 }
 
diff --git a/embassy-stm32/src/tl_mbox/ble.rs b/embassy-stm32/src/tl_mbox/ble.rs
index d8bf14d4..5cc0bb20 100644
--- a/embassy-stm32/src/tl_mbox/ble.rs
+++ b/embassy-stm32/src/tl_mbox/ble.rs
@@ -16,7 +16,7 @@ use crate::tl_mbox::cmd::CmdPacket;
 pub struct Ble;
 
 impl Ble {
-    pub(crate) fn new(ipcc: &mut Ipcc) -> Self {
+    pub(crate) fn new() -> Self {
         unsafe {
             LinkedListNode::init_head(EVT_QUEUE.as_mut_ptr());
 
@@ -28,12 +28,12 @@ impl Ble {
             });
         }
 
-        ipcc.c1_set_rx_channel(channels::cpu2::IPCC_BLE_EVENT_CHANNEL, true);
+        Ipcc::c1_set_rx_channel(channels::cpu2::IPCC_BLE_EVENT_CHANNEL, true);
 
         Ble
     }
 
-    pub(crate) fn evt_handler(ipcc: &mut Ipcc) {
+    pub(crate) fn evt_handler() {
         unsafe {
             let mut node_ptr = core::ptr::null_mut();
             let node_ptr_ptr: *mut _ = &mut node_ptr;
@@ -48,10 +48,10 @@ impl Ble {
             }
         }
 
-        ipcc.c1_clear_flag_channel(channels::cpu2::IPCC_BLE_EVENT_CHANNEL);
+        Ipcc::c1_clear_flag_channel(channels::cpu2::IPCC_BLE_EVENT_CHANNEL);
     }
 
-    pub(crate) fn send_cmd(ipcc: &mut Ipcc, buf: &[u8]) {
+    pub(crate) fn send_cmd(buf: &[u8]) {
         unsafe {
             let pcmd_buffer: *mut CmdPacket = (*TL_REF_TABLE.assume_init().ble_table).pcmd_buffer;
             let pcmd_serial: *mut CmdSerial = &mut (*pcmd_buffer).cmd_serial;
@@ -63,6 +63,6 @@ impl Ble {
             cmd_packet.cmd_serial.ty = TlPacketType::BleCmd as u8;
         }
 
-        ipcc.c1_set_flag_channel(channels::cpu1::IPCC_BLE_CMD_CHANNEL);
+        Ipcc::c1_set_flag_channel(channels::cpu1::IPCC_BLE_CMD_CHANNEL);
     }
 }
diff --git a/embassy-stm32/src/tl_mbox/evt.rs b/embassy-stm32/src/tl_mbox/evt.rs
index 770133f2..04feb3e6 100644
--- a/embassy-stm32/src/tl_mbox/evt.rs
+++ b/embassy-stm32/src/tl_mbox/evt.rs
@@ -131,9 +131,6 @@ impl EvtBox {
 
 impl Drop for EvtBox {
     fn drop(&mut self) {
-        use crate::ipcc::Ipcc;
-
-        let mut ipcc = Ipcc::new_inner(unsafe { crate::Peripherals::steal() }.IPCC);
-        mm::MemoryManager::evt_drop(self.ptr, &mut ipcc);
+        mm::MemoryManager::evt_drop(self.ptr);
     }
 }
diff --git a/embassy-stm32/src/tl_mbox/mm.rs b/embassy-stm32/src/tl_mbox/mm.rs
index f99ffa39..6e0818cf 100644
--- a/embassy-stm32/src/tl_mbox/mm.rs
+++ b/embassy-stm32/src/tl_mbox/mm.rs
@@ -30,27 +30,27 @@ impl MemoryManager {
         MemoryManager
     }
 
-    pub fn evt_handler(ipcc: &mut Ipcc) {
-        ipcc.c1_set_tx_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL, false);
+    pub fn evt_handler() {
+        Ipcc::c1_set_tx_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL, false);
         Self::send_free_buf();
-        ipcc.c1_set_flag_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL);
+        Ipcc::c1_set_flag_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL);
     }
 
-    pub fn evt_drop(evt: *mut EvtPacket, ipcc: &mut Ipcc) {
+    pub fn evt_drop(evt: *mut EvtPacket) {
         unsafe {
             let list_node = evt.cast();
 
             LinkedListNode::remove_tail(LOCAL_FREE_BUF_QUEUE.as_mut_ptr(), list_node);
         }
 
-        let channel_is_busy = ipcc.c1_is_active_flag(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL);
+        let channel_is_busy = Ipcc::c1_is_active_flag(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL);
 
         // postpone event buffer freeing to IPCC interrupt handler
         if channel_is_busy {
-            ipcc.c1_set_tx_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL, true);
+            Ipcc::c1_set_tx_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL, true);
         } else {
             Self::send_free_buf();
-            ipcc.c1_set_flag_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL);
+            Ipcc::c1_set_flag_channel(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL);
         }
     }
 
diff --git a/embassy-stm32/src/tl_mbox/mod.rs b/embassy-stm32/src/tl_mbox/mod.rs
index dc6104cc..1c927efa 100644
--- a/embassy-stm32/src/tl_mbox/mod.rs
+++ b/embassy-stm32/src/tl_mbox/mod.rs
@@ -1,6 +1,7 @@
 use core::mem::MaybeUninit;
 
 use bit_field::BitField;
+use embassy_cortex_m::interrupt::{Interrupt, InterruptExt};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::channel::Channel;
 
@@ -12,7 +13,7 @@ use self::shci::{shci_ble_init, ShciBleInitCmdParam};
 use self::sys::Sys;
 use self::unsafe_linked_list::LinkedListNode;
 use crate::interrupt;
-use crate::ipcc::Ipcc;
+use crate::ipcc::{Config, Ipcc};
 
 mod ble;
 mod channels;
@@ -58,13 +59,30 @@ pub struct FusInfoTable {
 pub struct ReceiveInterruptHandler {}
 
 impl interrupt::Handler<interrupt::IPCC_C1_RX> for ReceiveInterruptHandler {
-    unsafe fn on_interrupt() {}
+    unsafe fn on_interrupt() {
+        if Ipcc::is_rx_pending(channels::cpu2::IPCC_SYSTEM_EVENT_CHANNEL) {
+            sys::Sys::evt_handler();
+        } else if Ipcc::is_rx_pending(channels::cpu2::IPCC_BLE_EVENT_CHANNEL) {
+            ble::Ble::evt_handler();
+        } else {
+            todo!()
+        }
+    }
 }
 
 pub struct TransmitInterruptHandler {}
 
 impl interrupt::Handler<interrupt::IPCC_C1_TX> for TransmitInterruptHandler {
-    unsafe fn on_interrupt() {}
+    unsafe fn on_interrupt() {
+        if Ipcc::is_tx_pending(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL) {
+            // TODO: handle this case
+            let _ = sys::Sys::cmd_evt_handler();
+        } else if Ipcc::is_tx_pending(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL) {
+            mm::MemoryManager::evt_handler();
+        } else {
+            todo!()
+        }
+    }
 }
 
 /// # Version
@@ -298,9 +316,9 @@ pub struct TlMbox {
 impl TlMbox {
     /// initializes low-level transport between CPU1 and BLE stack on CPU2
     pub fn init(
-        ipcc: &mut Ipcc,
         _irqs: impl interrupt::Binding<interrupt::IPCC_C1_RX, ReceiveInterruptHandler>
             + interrupt::Binding<interrupt::IPCC_C1_TX, TransmitInterruptHandler>,
+        config: Config,
     ) -> TlMbox {
         unsafe {
             TL_REF_TABLE = MaybeUninit::new(RefTable {
@@ -336,29 +354,18 @@ impl TlMbox {
             HCI_ACL_DATA_BUFFER = MaybeUninit::zeroed();
         }
 
-        ipcc.init();
+        Ipcc::init(config);
 
-        let _sys = Sys::new(ipcc);
-        let _ble = Ble::new(ipcc);
+        let _sys = Sys::new();
+        let _ble = Ble::new();
         let _mm = MemoryManager::new();
 
-        //        rx_irq.disable();
-        //        tx_irq.disable();
-        //
-        //        rx_irq.set_handler_context(ipcc.as_mut_ptr() as *mut ());
-        //        tx_irq.set_handler_context(ipcc.as_mut_ptr() as *mut ());
-        //
-        //        rx_irq.set_handler(|ipcc| {
-        //            let ipcc: &mut Ipcc = unsafe { &mut *ipcc.cast() };
-        //            Self::interrupt_ipcc_rx_handler(ipcc);
-        //        });
-        //        tx_irq.set_handler(|ipcc| {
-        //            let ipcc: &mut Ipcc = unsafe { &mut *ipcc.cast() };
-        //            Self::interrupt_ipcc_tx_handler(ipcc);
-        //        });
-        //
-        //        rx_irq.enable();
-        //        tx_irq.enable();
+        // enable interrupts
+        unsafe { crate::interrupt::IPCC_C1_RX::steal() }.unpend();
+        unsafe { crate::interrupt::IPCC_C1_TX::steal() }.unpend();
+
+        unsafe { crate::interrupt::IPCC_C1_RX::steal() }.enable();
+        unsafe { crate::interrupt::IPCC_C1_TX::steal() }.enable();
 
         TlMbox { _sys, _ble, _mm }
     }
@@ -374,42 +381,19 @@ impl TlMbox {
         }
     }
 
-    pub fn shci_ble_init(&self, ipcc: &mut Ipcc, param: ShciBleInitCmdParam) {
-        shci_ble_init(ipcc, param);
+    pub fn shci_ble_init(&self, param: ShciBleInitCmdParam) {
+        shci_ble_init(param);
     }
 
-    pub fn send_ble_cmd(&self, ipcc: &mut Ipcc, buf: &[u8]) {
-        ble::Ble::send_cmd(ipcc, buf);
+    pub fn send_ble_cmd(&self, buf: &[u8]) {
+        ble::Ble::send_cmd(buf);
     }
 
-    // pub fn send_sys_cmd(&self, ipcc: &mut Ipcc, buf: &[u8]) {
-    //     sys::Sys::send_cmd(ipcc, buf);
+    // pub fn send_sys_cmd(&self, buf: &[u8]) {
+    //     sys::Sys::send_cmd(buf);
     // }
 
     pub async fn read(&self) -> EvtBox {
         TL_CHANNEL.recv().await
     }
-
-    #[allow(dead_code)]
-    fn interrupt_ipcc_rx_handler(ipcc: &mut Ipcc) {
-        if ipcc.is_rx_pending(channels::cpu2::IPCC_SYSTEM_EVENT_CHANNEL) {
-            sys::Sys::evt_handler(ipcc);
-        } else if ipcc.is_rx_pending(channels::cpu2::IPCC_BLE_EVENT_CHANNEL) {
-            ble::Ble::evt_handler(ipcc);
-        } else {
-            todo!()
-        }
-    }
-
-    #[allow(dead_code)]
-    fn interrupt_ipcc_tx_handler(ipcc: &mut Ipcc) {
-        if ipcc.is_tx_pending(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL) {
-            // TODO: handle this case
-            let _ = sys::Sys::cmd_evt_handler(ipcc);
-        } else if ipcc.is_tx_pending(channels::cpu1::IPCC_MM_RELEASE_BUFFER_CHANNEL) {
-            mm::MemoryManager::evt_handler(ipcc);
-        } else {
-            todo!()
-        }
-    }
 }
diff --git a/embassy-stm32/src/tl_mbox/shci.rs b/embassy-stm32/src/tl_mbox/shci.rs
index 61fd9e4a..3d7e994a 100644
--- a/embassy-stm32/src/tl_mbox/shci.rs
+++ b/embassy-stm32/src/tl_mbox/shci.rs
@@ -76,7 +76,7 @@ pub struct ShciBleInitCmdPacket {
     param: ShciBleInitCmdParam,
 }
 
-pub fn shci_ble_init(ipcc: &mut Ipcc, param: ShciBleInitCmdParam) {
+pub fn shci_ble_init(param: ShciBleInitCmdParam) {
     let mut packet = ShciBleInitCmdPacket {
         header: ShciHeader::default(),
         param,
@@ -95,7 +95,7 @@ pub fn shci_ble_init(ipcc: &mut Ipcc, param: ShciBleInitCmdParam) {
 
         cmd_buf.cmd_serial.ty = TlPacketType::SysCmd as u8;
 
-        ipcc.c1_set_flag_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL);
-        ipcc.c1_set_tx_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL, true);
+        Ipcc::c1_set_flag_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL);
+        Ipcc::c1_set_tx_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL, true);
     }
 }
diff --git a/embassy-stm32/src/tl_mbox/sys.rs b/embassy-stm32/src/tl_mbox/sys.rs
index 31ebde72..79e25714 100644
--- a/embassy-stm32/src/tl_mbox/sys.rs
+++ b/embassy-stm32/src/tl_mbox/sys.rs
@@ -12,7 +12,7 @@ use crate::ipcc::Ipcc;
 pub struct Sys;
 
 impl Sys {
-    pub(crate) fn new(ipcc: &mut Ipcc) -> Self {
+    pub(crate) fn new() -> Self {
         unsafe {
             LinkedListNode::init_head(SYSTEM_EVT_QUEUE.as_mut_ptr());
 
@@ -22,12 +22,12 @@ impl Sys {
             });
         }
 
-        ipcc.c1_set_rx_channel(channels::cpu2::IPCC_SYSTEM_EVENT_CHANNEL, true);
+        Ipcc::c1_set_rx_channel(channels::cpu2::IPCC_SYSTEM_EVENT_CHANNEL, true);
 
         Sys
     }
 
-    pub(crate) fn evt_handler(ipcc: &mut Ipcc) {
+    pub(crate) fn evt_handler() {
         unsafe {
             let mut node_ptr = core::ptr::null_mut();
             let node_ptr_ptr: *mut _ = &mut node_ptr;
@@ -43,11 +43,11 @@ impl Sys {
             }
         }
 
-        ipcc.c1_clear_flag_channel(channels::cpu2::IPCC_SYSTEM_EVENT_CHANNEL);
+        Ipcc::c1_clear_flag_channel(channels::cpu2::IPCC_SYSTEM_EVENT_CHANNEL);
     }
 
-    pub(crate) fn cmd_evt_handler(ipcc: &mut Ipcc) -> CcEvt {
-        ipcc.c1_set_tx_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL, false);
+    pub(crate) fn cmd_evt_handler() -> CcEvt {
+        Ipcc::c1_set_tx_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL, false);
 
         // ST's command response data structure is really convoluted.
         //
@@ -68,11 +68,11 @@ impl Sys {
     }
 
     #[allow(dead_code)]
-    pub(crate) fn send_cmd(ipcc: &mut Ipcc, buf: &[u8]) {
+    pub(crate) fn send_cmd(buf: &[u8]) {
         unsafe {
             // TODO: check this
             let cmd_buffer = &mut *(*TL_REF_TABLE.assume_init().sys_table).pcmd_buffer;
-            let cmd_serial: *mut CmdSerial = &mut (*cmd_buffer).cmd_serial;
+            let cmd_serial: *mut CmdSerial = &mut cmd_buffer.cmd_serial;
             let cmd_serial_buf = cmd_serial.cast();
 
             core::ptr::copy(buf.as_ptr(), cmd_serial_buf, buf.len());
@@ -80,8 +80,8 @@ impl Sys {
             let cmd_packet = &mut *(*TL_REF_TABLE.assume_init().sys_table).pcmd_buffer;
             cmd_packet.cmd_serial.ty = TlPacketType::SysCmd as u8;
 
-            ipcc.c1_set_flag_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL);
-            ipcc.c1_set_tx_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL, true);
+            Ipcc::c1_set_flag_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL);
+            Ipcc::c1_set_tx_channel(channels::cpu1::IPCC_SYSTEM_CMD_RSP_CHANNEL, true);
         }
     }
 }
diff --git a/examples/stm32wb/src/bin/tl_mbox.rs b/examples/stm32wb/src/bin/tl_mbox.rs
index 326e4be8..18d93a27 100644
--- a/examples/stm32wb/src/bin/tl_mbox.rs
+++ b/examples/stm32wb/src/bin/tl_mbox.rs
@@ -4,7 +4,7 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_stm32::ipcc::{Config, Ipcc};
+use embassy_stm32::ipcc::Config;
 use embassy_stm32::tl_mbox::TlMbox;
 use embassy_stm32::{bind_interrupts, tl_mbox};
 use embassy_time::{Duration, Timer};
@@ -41,13 +41,11 @@ async fn main(_spawner: Spawner) {
         Note: extended stack versions are not supported at this time. Do not attempt to install a stack with "extended" in the name.
     */
 
-    let p = embassy_stm32::init(Default::default());
+    let _p = embassy_stm32::init(Default::default());
     info!("Hello World!");
 
     let config = Config::default();
-    let mut ipcc = Ipcc::new(p.IPCC, config);
-
-    let mbox = TlMbox::init(&mut ipcc, Irqs);
+    let mbox = TlMbox::init(Irqs, config);
 
     loop {
         let wireless_fw_info = mbox.wireless_fw_info();
diff --git a/examples/stm32wb/src/bin/tl_mbox_tx_rx.rs b/examples/stm32wb/src/bin/tl_mbox_tx_rx.rs
index 7a69f26b..41c450a5 100644
--- a/examples/stm32wb/src/bin/tl_mbox_tx_rx.rs
+++ b/examples/stm32wb/src/bin/tl_mbox_tx_rx.rs
@@ -4,7 +4,7 @@
 
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_stm32::ipcc::{Config, Ipcc};
+use embassy_stm32::ipcc::Config;
 use embassy_stm32::tl_mbox::TlMbox;
 use embassy_stm32::{bind_interrupts, tl_mbox};
 use {defmt_rtt as _, panic_probe as _};
@@ -40,16 +40,11 @@ async fn main(_spawner: Spawner) {
         Note: extended stack versions are not supported at this time. Do not attempt to install a stack with "extended" in the name.
     */
 
-    let p = embassy_stm32::init(Default::default());
+    let _p = embassy_stm32::init(Default::default());
     info!("Hello World!");
 
     let config = Config::default();
-    let mut ipcc = Ipcc::new(p.IPCC, config);
-
-    let mbox = TlMbox::init(&mut ipcc, Irqs);
-
-    // initialize ble stack, does not return a response
-    mbox.shci_ble_init(&mut ipcc, Default::default());
+    let mbox = TlMbox::init(Irqs, config);
 
     info!("waiting for coprocessor to boot");
     let event_box = mbox.read().await;
@@ -74,10 +69,11 @@ async fn main(_spawner: Spawner) {
         );
     }
 
-    mbox.shci_ble_init(&mut ipcc, Default::default());
+    // initialize ble stack, does not return a response
+    mbox.shci_ble_init(Default::default());
 
     info!("resetting BLE");
-    mbox.send_ble_cmd(&mut ipcc, &[0x01, 0x03, 0x0c, 0x00, 0x00]);
+    mbox.send_ble_cmd(&[0x01, 0x03, 0x0c, 0x00, 0x00]);
 
     let event_box = mbox.read().await;
 
@@ -92,7 +88,10 @@ async fn main(_spawner: Spawner) {
 
     info!(
         "==> kind: {:#04x}, code: {:#04x}, payload_length: {}, payload: {:#04x}",
-        kind, code, payload_len, payload
+        kind,
+        code,
+        payload_len,
+        payload[3..]
     );
 
     loop {}