diff --git a/esp-hal/src/interrupt/riscv.rs b/esp-hal/src/interrupt/riscv.rs
index 391d617fa..983cb6b17 100644
--- a/esp-hal/src/interrupt/riscv.rs
+++ b/esp-hal/src/interrupt/riscv.rs
@@ -310,7 +310,9 @@ unsafe fn get_assigned_cpu_interrupt(interrupt: Interrupt) -> Option<CpuInterrup
 
     let cpu_intr = intr_map_base.offset(interrupt_number).read_volatile();
     if cpu_intr > 0 {
-        Some(core::mem::transmute(cpu_intr - EXTERNAL_INTERRUPT_OFFSET))
+        Some(core::mem::transmute::<u32, CpuInterrupt>(
+            cpu_intr - EXTERNAL_INTERRUPT_OFFSET,
+        ))
     } else {
         None
     }
@@ -327,15 +329,15 @@ mod vectored {
         for (prio, num) in PRIORITY_TO_INTERRUPT.iter().enumerate() {
             set_kind(
                 crate::get_core(),
-                core::mem::transmute(*num as u32),
+                core::mem::transmute::<u32, CpuInterrupt>(*num as u32),
                 InterruptKind::Level,
             );
             set_priority(
                 crate::get_core(),
-                core::mem::transmute(*num as u32),
-                core::mem::transmute((prio as u8) + 1),
+                core::mem::transmute::<u32, CpuInterrupt>(*num as u32),
+                core::mem::transmute::<u8, Priority>((prio as u8) + 1),
             );
-            enable_cpu_interrupt(core::mem::transmute(*num as u32));
+            enable_cpu_interrupt(core::mem::transmute::<u32, CpuInterrupt>(*num as u32));
         }
     }
 
@@ -349,7 +351,7 @@ mod vectored {
                 let interrupt_nr = status.trailing_zeros() as u16;
                 // safety: cast is safe because of repr(u16)
                 if let Some(cpu_interrupt) =
-                    get_assigned_cpu_interrupt(core::mem::transmute(interrupt_nr))
+                    get_assigned_cpu_interrupt(core::mem::transmute::<u16, Interrupt>(interrupt_nr))
                 {
                     let prio = get_priority_by_core(core, cpu_interrupt);
                     prios[prio as usize] |= 1 << (interrupt_nr as usize);
@@ -371,8 +373,9 @@ mod vectored {
             return Err(Error::InvalidInterruptPriority);
         }
         unsafe {
-            let cpu_interrupt =
-                core::mem::transmute(PRIORITY_TO_INTERRUPT[(level as usize) - 1] as u32);
+            let cpu_interrupt = core::mem::transmute::<u32, CpuInterrupt>(
+                PRIORITY_TO_INTERRUPT[(level as usize) - 1] as u32,
+            );
             map(crate::get_core(), interrupt, cpu_interrupt);
             enable_cpu_interrupt(cpu_interrupt);
         }
@@ -423,7 +426,8 @@ mod vectored {
         ) {
             EspDefaultHandler(interrupt);
         } else {
-            let handler: fn(&mut TrapFrame) = core::mem::transmute(handler);
+            let handler: fn(&mut TrapFrame) =
+                core::mem::transmute::<unsafe extern "C" fn(), fn(&mut TrapFrame)>(handler);
             handler(save_frame);
         }
     }
@@ -632,7 +636,7 @@ mod classic {
         let prio = intr_prio_base
             .offset(cpu_interrupt as isize)
             .read_volatile();
-        core::mem::transmute(prio as u8)
+        core::mem::transmute::<u8, Priority>(prio as u8)
     }
     #[no_mangle]
     #[link_section = ".trap"]
@@ -761,7 +765,7 @@ mod plic {
         let prio = plic_mxint_pri_ptr
             .offset(cpu_interrupt_number)
             .read_volatile();
-        core::mem::transmute(prio as u8)
+        core::mem::transmute::<u8, Priority>(prio as u8)
     }
     #[no_mangle]
     #[link_section = ".trap"]
@@ -904,7 +908,7 @@ mod clic {
         unsafe {
             let intr_cntrl = intr_cntrl(core, cpu_interrupt_number);
             let val = InterruptControl(intr_cntrl.read_volatile());
-            core::mem::transmute(val.priority())
+            core::mem::transmute::<u8, Priority>(val.priority())
         }
     }
 }
diff --git a/esp-hal/src/interrupt/xtensa.rs b/esp-hal/src/interrupt/xtensa.rs
index 5fa480f7c..a84b4aa4a 100644
--- a/esp-hal/src/interrupt/xtensa.rs
+++ b/esp-hal/src/interrupt/xtensa.rs
@@ -321,7 +321,8 @@ mod vectored {
                 let i = interrupt_nr as isize;
                 let cpu_interrupt = intr_map_base.offset(i).read_volatile();
                 // safety: cast is safe because of repr(u32)
-                let cpu_interrupt: CpuInterrupt = core::mem::transmute(cpu_interrupt);
+                let cpu_interrupt: CpuInterrupt =
+                    core::mem::transmute::<u32, CpuInterrupt>(cpu_interrupt);
                 let level = cpu_interrupt.level() as u8 as usize;
 
                 levels[level] |= 1 << i;
@@ -491,7 +492,8 @@ mod vectored {
         ) {
             EspDefaultHandler(level, interrupt);
         } else {
-            let handler: fn(&mut Context) = core::mem::transmute(handler);
+            let handler: fn(&mut Context) =
+                core::mem::transmute::<unsafe extern "C" fn(), fn(&mut Context)>(handler);
             handler(save_frame);
         }
     }
diff --git a/esp-hal/src/soc/esp32/gpio.rs b/esp-hal/src/soc/esp32/gpio.rs
index 3d3aef0cb..5f6314e78 100644
--- a/esp-hal/src/soc/esp32/gpio.rs
+++ b/esp-hal/src/soc/esp32/gpio.rs
@@ -76,42 +76,150 @@ pub(crate) fn get_io_mux_reg(gpio_num: u8) -> &'static crate::peripherals::io_mu
         let iomux = &*crate::peripherals::IO_MUX::PTR;
 
         match gpio_num {
-            0 => core::mem::transmute(iomux.gpio0()),
-            1 => core::mem::transmute(iomux.gpio1()),
-            2 => core::mem::transmute(iomux.gpio2()),
-            3 => core::mem::transmute(iomux.gpio3()),
-            4 => core::mem::transmute(iomux.gpio4()),
-            5 => core::mem::transmute(iomux.gpio5()),
-            6 => core::mem::transmute(iomux.gpio6()),
-            7 => core::mem::transmute(iomux.gpio7()),
-            8 => core::mem::transmute(iomux.gpio8()),
-            9 => core::mem::transmute(iomux.gpio9()),
-            10 => core::mem::transmute(iomux.gpio10()),
-            11 => core::mem::transmute(iomux.gpio11()),
-            12 => core::mem::transmute(iomux.gpio12()),
-            13 => core::mem::transmute(iomux.gpio13()),
-            14 => core::mem::transmute(iomux.gpio14()),
-            15 => core::mem::transmute(iomux.gpio15()),
-            16 => core::mem::transmute(iomux.gpio16()),
-            17 => core::mem::transmute(iomux.gpio17()),
-            18 => core::mem::transmute(iomux.gpio18()),
-            19 => core::mem::transmute(iomux.gpio19()),
-            20 => core::mem::transmute(iomux.gpio20()),
-            21 => core::mem::transmute(iomux.gpio21()),
-            22 => core::mem::transmute(iomux.gpio22()),
-            23 => core::mem::transmute(iomux.gpio23()),
-            24 => core::mem::transmute(iomux.gpio24()),
-            25 => core::mem::transmute(iomux.gpio25()),
-            26 => core::mem::transmute(iomux.gpio26()),
-            27 => core::mem::transmute(iomux.gpio27()),
-            32 => core::mem::transmute(iomux.gpio32()),
-            33 => core::mem::transmute(iomux.gpio33()),
-            34 => core::mem::transmute(iomux.gpio34()),
-            35 => core::mem::transmute(iomux.gpio35()),
-            36 => core::mem::transmute(iomux.gpio36()),
-            37 => core::mem::transmute(iomux.gpio37()),
-            38 => core::mem::transmute(iomux.gpio38()),
-            39 => core::mem::transmute(iomux.gpio39()),
+            0 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO0,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio0()),
+            1 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO1,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio1()),
+            2 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO2,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio2()),
+            3 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO3,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio3()),
+            4 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO4,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio4()),
+            5 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO5,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio5()),
+            6 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO6,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio6()),
+            7 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO7,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio7()),
+            8 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO8,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio8()),
+            9 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO9,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio9()),
+            10 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO10,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio10()),
+            11 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO11,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio11()),
+            12 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO12,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio12()),
+            13 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO13,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio13()),
+            14 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO14,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio14()),
+            15 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO15,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio15()),
+            16 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO16,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio16()),
+            17 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO17,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio17()),
+            18 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO18,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio18()),
+            19 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO19,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio19()),
+            20 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO20,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio20()),
+            21 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO21,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio21()),
+            22 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO22,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio22()),
+            23 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO23,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio23()),
+            24 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO24,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio24()),
+            25 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO25,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio25()),
+            26 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO26,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio26()),
+            27 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO27,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio27()),
+            32 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO32,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio32()),
+            33 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO33,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio33()),
+            34 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO34,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio34()),
+            35 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO35,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio35()),
+            36 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO36,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio36()),
+            37 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO37,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio37()),
+            38 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO38,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio38()),
+            39 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO39,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio39()),
             _ => panic!(),
         }
     }
diff --git a/esp-hal/src/soc/esp32s2/gpio.rs b/esp-hal/src/soc/esp32s2/gpio.rs
index 5edc7e369..f4e6ff345 100644
--- a/esp-hal/src/soc/esp32s2/gpio.rs
+++ b/esp-hal/src/soc/esp32s2/gpio.rs
@@ -82,45 +82,162 @@ pub(crate) const fn get_io_mux_reg(gpio_num: u8) -> &'static crate::peripherals:
         let iomux = &*crate::peripherals::IO_MUX::PTR;
 
         match gpio_num {
-            0 => core::mem::transmute(iomux.gpio0()),
-            1 => core::mem::transmute(iomux.gpio1()),
-            2 => core::mem::transmute(iomux.gpio2()),
-            3 => core::mem::transmute(iomux.gpio3()),
-            4 => core::mem::transmute(iomux.gpio4()),
-            5 => core::mem::transmute(iomux.gpio5()),
-            6 => core::mem::transmute(iomux.gpio6()),
-            7 => core::mem::transmute(iomux.gpio7()),
-            8 => core::mem::transmute(iomux.gpio8()),
-            9 => core::mem::transmute(iomux.gpio9()),
-            10 => core::mem::transmute(iomux.gpio10()),
-            11 => core::mem::transmute(iomux.gpio11()),
-            12 => core::mem::transmute(iomux.gpio12()),
-            13 => core::mem::transmute(iomux.gpio13()),
-            14 => core::mem::transmute(iomux.gpio14()),
-            15 => core::mem::transmute(iomux.gpio15()),
-            16 => core::mem::transmute(iomux.gpio16()),
-            17 => core::mem::transmute(iomux.gpio17()),
-            18 => core::mem::transmute(iomux.gpio18()),
-            19 => core::mem::transmute(iomux.gpio19()),
-            20 => core::mem::transmute(iomux.gpio20()),
-            21 => core::mem::transmute(iomux.gpio21()),
-            26 => core::mem::transmute(iomux.gpio26()),
-            27 => core::mem::transmute(iomux.gpio27()),
-            32 => core::mem::transmute(iomux.gpio32()),
-            33 => core::mem::transmute(iomux.gpio33()),
-            34 => core::mem::transmute(iomux.gpio34()),
-            35 => core::mem::transmute(iomux.gpio35()),
-            36 => core::mem::transmute(iomux.gpio36()),
-            37 => core::mem::transmute(iomux.gpio37()),
-            38 => core::mem::transmute(iomux.gpio38()),
-            39 => core::mem::transmute(iomux.gpio39()),
-            40 => core::mem::transmute(iomux.gpio40()),
-            41 => core::mem::transmute(iomux.gpio41()),
-            42 => core::mem::transmute(iomux.gpio42()),
-            43 => core::mem::transmute(iomux.gpio43()),
-            44 => core::mem::transmute(iomux.gpio44()),
-            45 => core::mem::transmute(iomux.gpio45()),
-            46 => core::mem::transmute(iomux.gpio46()),
+            0 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO0,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio0()),
+            1 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO1,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio1()),
+            2 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO2,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio2()),
+            3 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO3,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio3()),
+            4 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO4,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio4()),
+            5 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO5,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio5()),
+            6 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO6,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio6()),
+            7 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO7,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio7()),
+            8 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO8,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio8()),
+            9 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO9,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio9()),
+            10 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO10,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio10()),
+            11 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO11,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio11()),
+            12 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO12,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio12()),
+            13 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO13,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio13()),
+            14 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO14,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio14()),
+            15 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO15,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio15()),
+            16 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO16,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio16()),
+            17 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO17,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio17()),
+            18 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO18,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio18()),
+            19 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO19,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio19()),
+            20 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO20,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio20()),
+            21 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO21,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio21()),
+            26 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO26,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio26()),
+            27 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO27,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio27()),
+            32 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO32,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio32()),
+            33 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO33,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio33()),
+            34 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO34,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio34()),
+            35 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO35,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio35()),
+            36 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO36,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio36()),
+            37 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO37,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio37()),
+            38 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO38,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio38()),
+            39 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO39,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio39()),
+            40 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO40,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio40()),
+            41 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO41,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio41()),
+            42 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO42,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio42()),
+            43 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO43,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio43()),
+            44 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO44,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio44()),
+            45 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO45,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio45()),
+            46 => core::mem::transmute::<
+                &'static crate::peripherals::io_mux::GPIO46,
+                &'static crate::peripherals::io_mux::GPIO0,
+            >(iomux.gpio46()),
             _ => ::core::unreachable!(),
         }
     }
diff --git a/esp-hal/src/systimer.rs b/esp-hal/src/systimer.rs
index 4ff1a1e9a..b270cfd65 100644
--- a/esp-hal/src/systimer.rs
+++ b/esp-hal/src/systimer.rs
@@ -39,6 +39,12 @@ use crate::{
             target0_conf::TARGET0_CONF_SPEC,
             target0_hi::TARGET0_HI_SPEC,
             target0_lo::TARGET0_LO_SPEC,
+            target1_conf::TARGET1_CONF_SPEC,
+            target1_hi::TARGET1_HI_SPEC,
+            target1_lo::TARGET1_LO_SPEC,
+            target2_conf::TARGET2_CONF_SPEC,
+            target2_hi::TARGET2_HI_SPEC,
+            target2_lo::TARGET2_LO_SPEC,
         },
         SYSTIMER,
     },
@@ -157,14 +163,26 @@ impl<T, DM: crate::Mode, const CHANNEL: u8> Alarm<T, DM, CHANNEL> {
                     systimer.target0_lo(),
                 ),
                 1 => (
-                    transmute(systimer.target1_conf()),
-                    transmute(systimer.target1_hi()),
-                    transmute(systimer.target1_lo()),
+                    transmute::<&Reg<TARGET1_CONF_SPEC>, &Reg<TARGET0_CONF_SPEC>>(
+                        systimer.target1_conf(),
+                    ),
+                    transmute::<&Reg<TARGET1_HI_SPEC>, &Reg<TARGET0_HI_SPEC>>(
+                        systimer.target1_hi(),
+                    ),
+                    transmute::<&Reg<TARGET1_LO_SPEC>, &Reg<TARGET0_LO_SPEC>>(
+                        systimer.target1_lo(),
+                    ),
                 ),
                 2 => (
-                    transmute(systimer.target2_conf()),
-                    transmute(systimer.target2_hi()),
-                    transmute(systimer.target2_lo()),
+                    transmute::<&Reg<TARGET2_CONF_SPEC>, &Reg<TARGET0_CONF_SPEC>>(
+                        systimer.target2_conf(),
+                    ),
+                    transmute::<&Reg<TARGET2_HI_SPEC>, &Reg<TARGET0_HI_SPEC>>(
+                        systimer.target2_hi(),
+                    ),
+                    transmute::<&Reg<TARGET2_LO_SPEC>, &Reg<TARGET0_LO_SPEC>>(
+                        systimer.target2_lo(),
+                    ),
                 ),
                 _ => unreachable!(),
             };