stm32: move macrotables to embassy-stm32 build.rs

embassy-stm32/build.rs

@@ -2,6 +2,7 @@ use proc_macro2::TokenStream;
 use quote::{format_ident, quote};
 use std::collections::{HashMap, HashSet};
 use std::env;
+use std::fmt::Write as _;
 use std::fs;
 use std::path::PathBuf;
 use stm32_metapac::metadata::METADATA;
@@ -530,9 +531,127 @@ fn main() {
     }
 
     // ========
-    // Write generated.rs
+    // Write foreach_foo! macrotables
+
+    let mut interrupts_table: Vec<Vec<String>> = Vec::new();
+    let mut peripherals_table: Vec<Vec<String>> = Vec::new();
+    let mut pins_table: Vec<Vec<String>> = Vec::new();
+    let mut dma_channels_table: Vec<Vec<String>> = Vec::new();
+
+    let gpio_base = METADATA
+        .peripherals
+        .iter()
+        .find(|p| p.name == "GPIOA")
+        .unwrap()
+        .address as u32;
+    let gpio_stride = 0x400;
+
+    for p in METADATA.peripherals {
+        if let Some(regs) = &p.registers {
+            if regs.kind == "gpio" {
+                let port_letter = p.name.chars().skip(4).next().unwrap();
+                assert_eq!(0, (p.address as u32 - gpio_base) % gpio_stride);
+                let port_num = (p.address as u32 - gpio_base) / gpio_stride;
+
+                for pin_num in 0u32..16 {
+                    let pin_name = format!("P{}{}", port_letter, pin_num);
+                    pins_table.push(vec![
+                        pin_name,
+                        p.name.to_string(),
+                        port_num.to_string(),
+                        pin_num.to_string(),
+                        format!("EXTI{}", pin_num),
+                    ]);
+                }
+            }
+
+            for irq in p.interrupts {
+                let mut row = Vec::new();
+                row.push(p.name.to_string());
+                row.push(regs.kind.to_string());
+                row.push(regs.block.to_string());
+                row.push(irq.signal.to_string());
+                row.push(irq.interrupt.to_ascii_uppercase());
+                interrupts_table.push(row)
+            }
+
+            let mut row = Vec::new();
+            row.push(regs.kind.to_string());
+            row.push(p.name.to_string());
+            peripherals_table.push(row);
+        }
+    }
+
+    let mut dma_channel_count: usize = 0;
+    let mut bdma_channel_count: usize = 0;
+
+    for ch in METADATA.dma_channels {
+        let mut row = Vec::new();
+        let dma_peri = METADATA
+            .peripherals
+            .iter()
+            .find(|p| p.name == ch.dma)
+            .unwrap();
+        let bi = dma_peri.registers.as_ref().unwrap();
+
+        let num;
+        match bi.kind {
+            "dma" => {
+                num = dma_channel_count;
+                dma_channel_count += 1;
+            }
+            "bdma" => {
+                num = bdma_channel_count;
+                bdma_channel_count += 1;
+            }
+            _ => panic!("bad dma channel kind {}", bi.kind),
+        }
+
+        row.push(ch.name.to_string());
+        row.push(ch.dma.to_string());
+        row.push(bi.kind.to_string());
+        row.push(ch.channel.to_string());
+        row.push(num.to_string());
+        if let Some(dmamux) = &ch.dmamux {
+            let dmamux_channel = ch.dmamux_channel.unwrap();
+            row.push(format!(
+                "{{dmamux: {}, dmamux_channel: {}}}",
+                dmamux, dmamux_channel
+            ));
+        } else {
+            row.push("{}".to_string());
+        }
+
+        dma_channels_table.push(row);
+    }
+
+    g.extend(quote! {
+        pub(crate) const DMA_CHANNEL_COUNT: usize = #dma_channel_count;
+        pub(crate) const BDMA_CHANNEL_COUNT: usize = #bdma_channel_count;
+    });
+
+    for irq in METADATA.interrupts {
+        let name = irq.name.to_ascii_uppercase();
+        interrupts_table.push(vec![name.clone()]);
+        if name.contains("EXTI") {
+            interrupts_table.push(vec!["EXTI".to_string(), name.clone()]);
+        }
+    }
+
+    let mut m = String::new();
+
+    make_table(&mut m, "foreach_interrupt", &interrupts_table);
+    make_table(&mut m, "foreach_peripheral", &peripherals_table);
+    make_table(&mut m, "foreach_pin", &pins_table);
+    make_table(&mut m, "foreach_dma_channel", &dma_channels_table);
 
     let out_dir = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    let out_file = out_dir.join("macros.rs").to_string_lossy().to_string();
+    fs::write(out_file, m).unwrap();
+
+    // ========
+    // Write generated.rs
+
     let out_file = out_dir.join("generated.rs").to_string_lossy().to_string();
     fs::write(out_file, g.to_string()).unwrap();
 
@@ -644,3 +763,30 @@ impl<T: Iterator> IteratorExt for T {
         }
     }
 }
+
+fn make_table(out: &mut String, name: &str, data: &Vec<Vec<String>>) {
+    write!(
+        out,
+        "#[macro_export]
+macro_rules! {} {{
+    ($($pat:tt => $code:tt;)*) => {{
+        macro_rules! __{}_inner {{
+            $(($pat) => $code;)*
+            ($_:tt) => {{}}
+        }}
+",
+        name, name
+    )
+    .unwrap();
+
+    for row in data {
+        write!(out, "        __{}_inner!(({}));\n", name, row.join(",")).unwrap();
+    }
+
+    write!(
+        out,
+        "    }};
+}}"
+    )
+    .unwrap();
+}

embassy-stm32/src/adc/mod.rs

@@ -36,7 +36,7 @@ pub trait Instance: sealed::Instance + crate::rcc::RccPeripheral + 'static {}
 pub trait Common: sealed::Common + 'static {}
 pub trait AdcPin<T: Instance>: sealed::AdcPin<T> {}
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (adc, $inst:ident) => {
         impl crate::adc::sealed::Instance for peripherals::$inst {
             fn regs() -> &'static crate::pac::adc::Adc {
@@ -44,7 +44,7 @@ crate::pac::peripherals!(
             }
             #[cfg(not(adc_f1))]
             fn common_regs() -> &'static crate::pac::adccommon::AdcCommon {
-                crate::pac::peripherals!{
+                foreach_peripheral!{
                     (adccommon, $common_inst:ident) => {
                         return &crate::pac::$common_inst
                     };
@@ -57,7 +57,7 @@ crate::pac::peripherals!(
 );
 
 #[cfg(not(adc_f1))]
-crate::pac::peripherals!(
+foreach_peripheral!(
     (adccommon, $inst:ident) => {
         impl sealed::Common for peripherals::$inst {
             fn regs() -> &'static crate::pac::adccommon::AdcCommon {

embassy-stm32/src/can/bxcan.rs

@@ -70,7 +70,7 @@ pub(crate) mod sealed {
 
 pub trait Instance: sealed::Instance + RccPeripheral {}
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (can, $inst:ident) => {
         impl sealed::Instance for peripherals::$inst {
             fn regs() -> &'static crate::pac::can::Can {
@@ -86,7 +86,7 @@ crate::pac::peripherals!(
     };
 );
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (can, CAN) => {
         unsafe impl bxcan::FilterOwner for peripherals::CAN {
             const NUM_FILTER_BANKS: u8 = 14;

embassy-stm32/src/dac/mod.rs

@@ -16,7 +16,7 @@ pub trait Instance: sealed::Instance + 'static {}
 
 pub trait DacPin<T: Instance, const C: u8>: crate::gpio::Pin + 'static {}
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (dac, $inst:ident) => {
         impl crate::dac::sealed::Instance for peripherals::$inst {
             fn regs() -> &'static crate::pac::dac::Dac {

embassy-stm32/src/dcmi.rs

@@ -474,7 +474,7 @@ macro_rules! impl_peripheral {
     };
 }
 
-crate::pac::interrupts! {
+foreach_interrupt! {
     ($inst:ident, dcmi, $block:ident, GLOBAL, $irq:ident) => {
         impl_peripheral!($inst, $irq);
     };

embassy-stm32/src/dma/bdma.rs

@@ -7,6 +7,7 @@ use embassy::interrupt::{Interrupt, InterruptExt};
 use embassy::waitqueue::AtomicWaker;
 
 use crate::dma::Request;
+use crate::generated::BDMA_CHANNEL_COUNT;
 use crate::pac;
 use crate::pac::bdma::vals;
 
@@ -22,62 +23,44 @@ impl From<WordSize> for vals::Size {
     }
 }
 
-const CH_COUNT: usize = pac::peripheral_count!(bdma) * 8;
-
 struct State {
-    ch_wakers: [AtomicWaker; CH_COUNT],
+    ch_wakers: [AtomicWaker; BDMA_CHANNEL_COUNT],
 }
 
 impl State {
     const fn new() -> Self {
         const AW: AtomicWaker = AtomicWaker::new();
         Self {
-            ch_wakers: [AW; CH_COUNT],
+            ch_wakers: [AW; BDMA_CHANNEL_COUNT],
         }
     }
 }
 
 static STATE: State = State::new();
 
-macro_rules! dma_num {
-    (DMA1) => {
-        0
-    };
-    (DMA2) => {
-        1
-    };
-    (BDMA) => {
-        0
-    };
-    (BDMA1) => {
-        0
-    };
-    (BDMA2) => {
-        1
-    };
-}
-
 pub(crate) unsafe fn on_irq() {
-    pac::peripherals! {
+    foreach_peripheral! {
+        (bdma, BDMA1) => {
+            // BDMA1 in H7 doesn't use DMAMUX, which breaks
+        };
         (bdma, $dma:ident) => {
-                let isr = pac::$dma.isr().read();
+            let isr = pac::$dma.isr().read();
-                let dman = dma_num!($dma);
+            foreach_dma_channel! {
-
+                ($channel_peri:ident, $dma, bdma, $channel_num:expr, $index:expr, $dmamux:tt) => {
-                for chn in 0..pac::dma_channels_count!($dma) {
+                    let cr = pac::$dma.ch($channel_num).cr();
-                    let cr = pac::$dma.ch(chn).cr();
+                    if isr.tcif($channel_num) && cr.read().tcie() {
-                    if isr.tcif(chn) && cr.read().tcie() {
                         cr.write(|_| ()); // Disable channel interrupts with the default value.
-                        let n = dma_num!($dma) * 8 + chn;
+                        STATE.ch_wakers[$index].wake();
-                        STATE.ch_wakers[n].wake();
                     }
-                }
+                };
+            }
         };
     }
 }
 
 /// safety: must be called only once
 pub(crate) unsafe fn init() {
-    pac::interrupts! {
+    foreach_interrupt! {
         ($peri:ident, bdma, $block:ident, $signal_name:ident, $irq:ident) => {
             crate::interrupt::$irq::steal().enable();
         };
@@ -85,20 +68,20 @@ pub(crate) unsafe fn init() {
     crate::generated::init_bdma();
 }
 
-pac::dma_channels! {
+foreach_dma_channel! {
-    ($channel_peri:ident, BDMA1, bdma, $channel_num:expr, $dmamux:tt) => {
+    ($channel_peri:ident, BDMA1, bdma, $channel_num:expr, $index:expr, $dmamux:tt) => {
         // BDMA1 in H7 doesn't use DMAMUX, which breaks
     };
-    ($channel_peri:ident, $dma_peri:ident, bdma, $channel_num:expr, $dmamux:tt) => {
+    ($channel_peri:ident, $dma_peri:ident, bdma, $channel_num:expr, $index:expr, $dmamux:tt) => {
         impl crate::dma::sealed::Channel for crate::peripherals::$channel_peri {
 
-            unsafe fn start_write<W: Word>(&mut self, request: Request, buf: *const[W], reg_addr: *mut W) {
+            unsafe fn start_write<W: Word>(&mut self, _request: Request, buf: *const[W], reg_addr: *mut W) {
                 let (ptr, len) = super::slice_ptr_parts(buf);
                 low_level_api::start_transfer(
                     pac::$dma_peri,
                     $channel_num,
                     #[cfg(any(bdma_v2, dmamux))]
-                    request,
+                    _request,
                     vals::Dir::FROMMEMORY,
                     reg_addr as *const u32,
                     ptr as *mut u32,
@@ -113,13 +96,13 @@ pac::dma_channels! {
             }
 
 
-            unsafe fn start_write_repeated<W: Word>(&mut self, request: Request, repeated: W, count: usize, reg_addr: *mut W) {
+            unsafe fn start_write_repeated<W: Word>(&mut self, _request: Request, repeated: W, count: usize, reg_addr: *mut W) {
                 let buf = [repeated];
                 low_level_api::start_transfer(
                     pac::$dma_peri,
                     $channel_num,
                     #[cfg(any(bdma_v2, dmamux))]
-                    request,
+                    _request,
                     vals::Dir::FROMMEMORY,
                     reg_addr as *const u32,
                     buf.as_ptr() as *mut u32,
@@ -133,13 +116,13 @@ pac::dma_channels! {
                 )
             }
 
-            unsafe fn start_read<W: Word>(&mut self, request: Request, reg_addr: *const W, buf: *mut [W]) {
+            unsafe fn start_read<W: Word>(&mut self, _request: Request, reg_addr: *const W, buf: *mut [W]) {
                 let (ptr, len) = super::slice_ptr_parts_mut(buf);
                 low_level_api::start_transfer(
                     pac::$dma_peri,
                     $channel_num,
                     #[cfg(any(bdma_v2, dmamux))]
-                    request,
+                    _request,
                     vals::Dir::FROMPERIPHERAL,
                     reg_addr as *const u32,
                     ptr as *mut u32,
@@ -165,7 +148,7 @@ pac::dma_channels! {
             }
 
             fn set_waker(&mut self, waker: &Waker) {
-                unsafe {low_level_api::set_waker(dma_num!($dma_peri) * 8 + $channel_num, waker )}
+                unsafe { low_level_api::set_waker($index, waker) }
             }
         }
 

embassy-stm32/src/dma/dma.rs

@@ -4,14 +4,13 @@ use core::task::Waker;
 use embassy::interrupt::{Interrupt, InterruptExt};
 use embassy::waitqueue::AtomicWaker;
 
+use crate::generated::DMA_CHANNEL_COUNT;
 use crate::interrupt;
 use crate::pac;
 use crate::pac::dma::{regs, vals};
 
 use super::{Request, Word, WordSize};
 
-const CH_COUNT: usize = pac::peripheral_count!(DMA) * 8;
-
 impl From<WordSize> for vals::Size {
     fn from(raw: WordSize) -> Self {
         match raw {
@@ -23,44 +22,31 @@ impl From<WordSize> for vals::Size {
 }
 
 struct State {
-    ch_wakers: [AtomicWaker; CH_COUNT],
+    ch_wakers: [AtomicWaker; DMA_CHANNEL_COUNT],
 }
 
 impl State {
     const fn new() -> Self {
         const AW: AtomicWaker = AtomicWaker::new();
         Self {
-            ch_wakers: [AW; CH_COUNT],
+            ch_wakers: [AW; DMA_CHANNEL_COUNT],
         }
     }
 }
 
 static STATE: State = State::new();
 
-macro_rules! dma_num {
-    (DMA1) => {
-        0
-    };
-    (DMA2) => {
-        1
-    };
-}
-
 pub(crate) unsafe fn on_irq() {
-    pac::peripherals! {
+    foreach_peripheral! {
         (dma, $dma:ident) => {
-            for isrn in 0..2 {
+            foreach_dma_channel! {
-                let isr = pac::$dma.isr(isrn).read();
+                ($channel_peri:ident, $dma, dma, $channel_num:expr, $index:expr, $dmamux:tt) => {
-
+                    let cr = pac::$dma.st($channel_num).cr();
-                for chn in 0..4 {
+                    if pac::$dma.isr($channel_num/4).read().tcif($channel_num%4) && cr.read().tcie() {
-                    let cr = pac::$dma.st(isrn * 4 + chn).cr();
-
-                    if isr.tcif(chn) && cr.read().tcie() {
                         cr.write(|_| ()); // Disable channel interrupts with the default value.
-                        let n = dma_num!($dma) * 8 + isrn * 4 + chn;
+                        STATE.ch_wakers[$index].wake();
-                        STATE.ch_wakers[n].wake();
                     }
-                }
+                };
             }
         };
     }
@@ -68,7 +54,7 @@ pub(crate) unsafe fn on_irq() {
 
 /// safety: must be called only once
 pub(crate) unsafe fn init() {
-    pac::interrupts! {
+    foreach_interrupt! {
         ($peri:ident, dma, $block:ident, $signal_name:ident, $irq:ident) => {
             interrupt::$irq::steal().enable();
         };
@@ -76,8 +62,8 @@ pub(crate) unsafe fn init() {
     crate::generated::init_dma();
 }
 
-pac::dma_channels! {
+foreach_dma_channel! {
-    ($channel_peri:ident, $dma_peri:ident, dma, $channel_num:expr, $dmamux:tt) => {
+    ($channel_peri:ident, $dma_peri:ident, dma, $channel_num:expr, $index:expr, $dmamux:tt) => {
         impl crate::dma::sealed::Channel for crate::peripherals::$channel_peri {
             unsafe fn start_write<W: Word>(&mut self, request: Request, buf: *const [W], reg_addr: *mut W) {
                 let (ptr, len) = super::slice_ptr_parts(buf);
@@ -149,7 +135,7 @@ pac::dma_channels! {
             }
 
             fn set_waker(&mut self, waker: &Waker) {
-                unsafe {low_level_api::set_waker(dma_num!($dma_peri) * 8 + $channel_num, waker )}
+                unsafe {low_level_api::set_waker($index, waker )}
             }
         }
 

embassy-stm32/src/dma/dmamux.rs

@@ -35,8 +35,8 @@ pub trait MuxChannel: sealed::MuxChannel + super::Channel {
     type Mux;
 }
 
-pac::dma_channels! {
+foreach_dma_channel! {
-    ($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, {dmamux: $dmamux:ident, dmamux_channel: $dmamux_channel:expr}) => {
+    ($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, $index:expr, {dmamux: $dmamux:ident, dmamux_channel: $dmamux_channel:expr}) => {
         impl sealed::MuxChannel for peripherals::$channel_peri {
             const DMAMUX_CH_NUM: u8 = $dmamux_channel;
             const DMAMUX_REGS: pac::dmamux::Dmamux = pac::$dmamux;

embassy-stm32/src/exti.rs

@@ -278,7 +278,7 @@ impl<'a> Future for ExtiInputFuture<'a> {
 
 macro_rules! foreach_exti_irq {
     ($action:ident) => {
-        crate::pac::interrupts!(
+        foreach_interrupt!(
             (EXTI0)  => { $action!(EXTI0); };
             (EXTI1)  => { $action!(EXTI1); };
             (EXTI2)  => { $action!(EXTI2); };

embassy-stm32/src/fmc/mod.rs

@@ -127,7 +127,7 @@ impl<'d, T: Instance> Fmc<'d, T> {
     ));
 }
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (fmc, $inst:ident) => {
         impl crate::fmc::sealed::Instance for crate::peripherals::$inst {
             fn regs() -> stm32_metapac::fmc::Fmc {

embassy-stm32/src/gpio.rs

@@ -558,7 +558,7 @@ impl sealed::Pin for AnyPin {
 
 // ====================
 
-crate::pac::pins!(
+foreach_pin!(
     ($pin_name:ident, $port_name:ident, $port_num:expr, $pin_num:expr, $exti_ch:ident) => {
         impl Pin for peripherals::$pin_name {
             #[cfg(feature = "exti")]

embassy-stm32/src/i2c/mod.rs

@@ -37,7 +37,7 @@ pin_trait!(SdaPin, Instance);
 dma_trait!(RxDma, Instance);
 dma_trait!(TxDma, Instance);
 
-crate::pac::interrupts!(
+foreach_interrupt!(
     ($inst:ident, i2c, $block:ident, EV, $irq:ident) => {
         impl sealed::Instance for peripherals::$inst {
             fn regs() -> crate::pac::i2c::I2c {

embassy-stm32/src/lib.rs

@@ -11,6 +11,7 @@ pub(crate) use stm32_metapac as pac;
 
 // This must go FIRST so that all the other modules see its macros.
 pub mod fmt;
+include!(concat!(env!("OUT_DIR"), "/macros.rs"));
 
 // Utilities
 pub mod interrupt;
@@ -62,7 +63,7 @@ pub mod usb_otg;
 pub mod subghz;
 
 // This must go last, so that it sees all the impl_foo! macros defined earlier.
-mod generated {
+pub(crate) mod generated {
 
     #![allow(dead_code)]
     #![allow(unused_imports)]

embassy-stm32/src/pwm/mod.rs

@@ -127,7 +127,7 @@ macro_rules! impl_compare_capable_16bit {
     };
 }
 
-crate::pac::interrupts! {
+foreach_interrupt! {
     ($inst:ident, timer, TIM_GP16, UP, $irq:ident) => {
         impl crate::pwm::sealed::CaptureCompare16bitInstance for crate::peripherals::$inst {
             unsafe fn set_output_compare_mode(

embassy-stm32/src/rng.rs

@@ -136,7 +136,7 @@ pub(crate) mod sealed {
 
 pub trait Instance: sealed::Instance + crate::rcc::RccPeripheral {}
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (rng, $inst:ident) => {
         impl Instance for peripherals::$inst {}
 
@@ -165,7 +165,7 @@ macro_rules! irq {
     };
 }
 
-crate::pac::interrupts!(
+foreach_interrupt!(
     (RNG) => {
         irq!(RNG);
     };

embassy-stm32/src/sdmmc/v2.rs

@@ -1271,7 +1271,7 @@ where
     }
 }
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (sdmmc, $inst:ident) => {
         impl sealed::Instance for peripherals::$inst {
             type Interrupt = crate::interrupt::$inst;

embassy-stm32/src/spi/mod.rs

@@ -874,7 +874,7 @@ pin_trait!(MisoPin, Instance);
 dma_trait!(RxDma, Instance);
 dma_trait!(TxDma, Instance);
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (spi, $inst:ident) => {
         impl sealed::Instance for peripherals::$inst {
             fn regs() -> &'static crate::pac::spi::Spi {

embassy-stm32/src/time_driver.rs

@@ -29,7 +29,7 @@ type T = peripherals::TIM4;
 #[cfg(time_driver_tim5)]
 type T = peripherals::TIM5;
 
-crate::pac::interrupts! {
+foreach_interrupt! {
     (TIM2, timer, $block:ident, UP, $irq:ident) => {
         #[cfg(time_driver_tim2)]
         #[interrupt]

embassy-stm32/src/timer/mod.rs

@@ -155,7 +155,7 @@ macro_rules! impl_32bit_timer {
     };
 }
 
-crate::pac::interrupts! {
+foreach_interrupt! {
     ($inst:ident, timer, TIM_BASIC, UP, $irq:ident) => {
         impl_basic_16bit_timer!($inst, $irq);
 

embassy-stm32/src/usart/mod.rs

@@ -601,7 +601,7 @@ pin_trait!(CkPin, Instance);
 dma_trait!(TxDma, Instance);
 dma_trait!(RxDma, Instance);
 
-crate::pac::interrupts!(
+foreach_interrupt!(
     ($inst:ident, usart, $block:ident, $signal_name:ident, $irq:ident) => {
         impl sealed::Instance for peripherals::$inst {
             fn regs(&self) -> crate::pac::usart::Usart {

embassy-stm32/src/usb_otg.rs

@@ -135,7 +135,7 @@ pin_trait!(UlpiD5Pin, Instance);
 pin_trait!(UlpiD6Pin, Instance);
 pin_trait!(UlpiD7Pin, Instance);
 
-crate::pac::peripherals!(
+foreach_peripheral!(
     (otgfs, $inst:ident) => {
         impl sealed::Instance for peripherals::$inst {
             const REGISTERS: *const () = crate::pac::$inst.0 as *const ();
@@ -223,7 +223,7 @@ crate::pac::peripherals!(
     };
 );
 
-crate::pac::interrupts!(
+foreach_interrupt!(
     ($inst:ident, otgfs, $block:ident, GLOBAL, $irq:ident) => {
         unsafe impl USBInterrupt for crate::interrupt::$irq {}
     };