10 files changed, 325 insertions, 171 deletions

diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index 4e37c94fe..058d50124 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -28,6 +28,7 @@ stm32-metapac = { version = "0.1.0", path = "../stm32-metapac", features = ["rt"
 vcell = { version = "0.1.3", optional = true }
 
 cfg-if = "1.0.0"
+paste = "1.0.5"
 
 [build-dependencies]
 stm32-metapac = { version = "0.1.0", path = "../stm32-metapac", default-features = false }
diff --git a/embassy-stm32/gen.py b/embassy-stm32/gen.py
index 386c5ce17..01c778716 100644
--- a/embassy-stm32/gen.py
+++ b/embassy-stm32/gen.py
@@ -73,13 +73,16 @@ with open(output_file, 'w') as f:
                 pins.add(pin)
                 singletons.append(pin)
 
-        if block_mod == 'dma':
-            custom_singletons = True
-            for ch_num in range(8):
-                channel = f'{name}_CH{ch_num}'
-                singletons.append(channel)
+        # if block_mod == 'dma':
+        #     custom_singletons = True
+        #     for ch_num in range(8):
+        #         channel = f'{name}_CH{ch_num}'
+        #         singletons.append(channel)
 
         if not custom_singletons:
             singletons.append(name)
 
+    for (channel_id, defn) in core['dma_channels'].items():
+        singletons.append( channel_id )
+
     f.write(f"embassy_extras::peripherals!({','.join(singletons)});")
diff --git a/embassy-stm32/src/bdma/mod.rs b/embassy-stm32/src/bdma/mod.rs
new file mode 100644
index 000000000..e85ade5df
--- /dev/null
+++ b/embassy-stm32/src/bdma/mod.rs
@@ -0,0 +1,69 @@
+#![macro_use]
+
+#[cfg_attr(bdma_v1, path = "v1.rs")]
+#[cfg_attr(bdma_v2, path = "v2.rs")]
+mod _version;
+
+#[allow(unused)]
+pub use _version::*;
+
+use crate::pac;
+use crate::peripherals;
+
+pub(crate) mod sealed {
+    use super::*;
+
+    pub trait Channel {
+        fn num(&self) -> u8;
+
+        fn dma_num(&self) -> u8 {
+            self.num() / 8
+        }
+        fn ch_num(&self) -> u8 {
+            self.num() % 8
+        }
+        fn regs(&self) -> pac::dma::Dma {
+            pac::DMA(self.num() as _)
+        }
+    }
+}
+
+pub trait Channel: sealed::Channel + Sized {}
+
+macro_rules! impl_dma_channel {
+    ($channel_peri:ident, $dma_num:expr, $ch_num:expr) => {
+        impl Channel for peripherals::$channel_peri {}
+        impl sealed::Channel for peripherals::$channel_peri {
+            #[inline]
+            fn num(&self) -> u8 {
+                $dma_num * 8 + $ch_num
+            }
+        }
+    };
+}
+
+/*
+crate::pac::peripherals!(
+    (dma,DMA1) => {
+        impl_dma_channel!(DMA1_CH0, 0, 0);
+        impl_dma_channel!(DMA1_CH1, 0, 1);
+        impl_dma_channel!(DMA1_CH2, 0, 2);
+        impl_dma_channel!(DMA1_CH3, 0, 3);
+        impl_dma_channel!(DMA1_CH4, 0, 4);
+        impl_dma_channel!(DMA1_CH5, 0, 5);
+        impl_dma_channel!(DMA1_CH6, 0, 6);
+        impl_dma_channel!(DMA1_CH7, 0, 7);
+    };
+
+    (dma,DMA2) => {
+        impl_dma_channel!(DMA2_CH0, 1, 0);
+        impl_dma_channel!(DMA2_CH1, 1, 1);
+        impl_dma_channel!(DMA2_CH2, 1, 2);
+        impl_dma_channel!(DMA2_CH3, 1, 3);
+        impl_dma_channel!(DMA2_CH4, 1, 4);
+        impl_dma_channel!(DMA2_CH5, 1, 5);
+        impl_dma_channel!(DMA2_CH6, 1, 6);
+        impl_dma_channel!(DMA2_CH7, 1, 7);
+    };
+);
+ */
diff --git a/embassy-stm32/src/dma/mod.rs b/embassy-stm32/src/dma/mod.rs
index 773cdc8b8..a8a22ce89 100644
--- a/embassy-stm32/src/dma/mod.rs
+++ b/embassy-stm32/src/dma/mod.rs
@@ -1,67 +1,22 @@
 #![macro_use]
 
-#[cfg_attr(dma_v1, path = "v1.rs")]
+//#[cfg_attr(dma_v1, path = "v1.rs")]
 #[cfg_attr(dma_v2, path = "v2.rs")]
 mod _version;
 
 #[allow(unused)]
 pub use _version::*;
 
-use crate::pac;
-use crate::peripherals;
+use core::future::Future;
 
-pub(crate) mod sealed {
-    use super::*;
+pub trait WriteDma<T> {
+    type WriteDmaFuture<'a>: Future<Output = ()> + 'a
+    where
+        Self: 'a;
 
-    pub trait Channel {
-        fn num(&self) -> u8;
-
-        fn dma_num(&self) -> u8 {
-            self.num() / 8
-        }
-        fn ch_num(&self) -> u8 {
-            self.num() % 8
-        }
-        fn regs(&self) -> pac::dma::Dma {
-            pac::DMA(self.num() as _)
-        }
-    }
+    fn transfer<'a>(&'a mut self, buf: &'a [u8], dst: *mut u8) -> Self::WriteDmaFuture<'a>
+    where
+        T: 'a;
 }
 
-pub trait Channel: sealed::Channel + Sized {}
-
-macro_rules! impl_dma_channel {
-    ($type:ident, $dma_num:expr, $ch_num:expr) => {
-        impl Channel for peripherals::$type {}
-        impl sealed::Channel for peripherals::$type {
-            #[inline]
-            fn num(&self) -> u8 {
-                $dma_num * 8 + $ch_num
-            }
-        }
-    };
-}
-
-crate::pac::peripherals!(
-    (dma,DMA1) => {
-        impl_dma_channel!(DMA1_CH0, 0, 0);
-        impl_dma_channel!(DMA1_CH1, 0, 1);
-        impl_dma_channel!(DMA1_CH2, 0, 2);
-        impl_dma_channel!(DMA1_CH3, 0, 3);
-        impl_dma_channel!(DMA1_CH4, 0, 4);
-        impl_dma_channel!(DMA1_CH5, 0, 5);
-        impl_dma_channel!(DMA1_CH6, 0, 6);
-        impl_dma_channel!(DMA1_CH7, 0, 7);
-    };
-
-    (dma,DMA2) => {
-        impl_dma_channel!(DMA2_CH0, 1, 0);
-        impl_dma_channel!(DMA2_CH1, 1, 1);
-        impl_dma_channel!(DMA2_CH2, 1, 2);
-        impl_dma_channel!(DMA2_CH3, 1, 3);
-        impl_dma_channel!(DMA2_CH4, 1, 4);
-        impl_dma_channel!(DMA2_CH5, 1, 5);
-        impl_dma_channel!(DMA2_CH6, 1, 6);
-        impl_dma_channel!(DMA2_CH7, 1, 7);
-    };
-);
+pub trait ReadDma {}
diff --git a/embassy-stm32/src/dma/v2.rs b/embassy-stm32/src/dma/v2.rs
index e7bd69130..6c6bbde23 100644
--- a/embassy-stm32/src/dma/v2.rs
+++ b/embassy-stm32/src/dma/v2.rs
@@ -9,9 +9,14 @@ use crate::interrupt;
 use crate::pac;
 use crate::pac::dma::{regs, vals};
 
-const DMAS: [pac::dma::Dma; 2] = [pac::DMA1, pac::DMA2];
-
-const CH_COUNT: usize = 16;
+use crate::pac::dma_channels;
+use crate::pac::interrupts;
+use crate::pac::peripheral_count;
+use crate::pac::peripheral_dma_channels;
+use crate::pac::peripherals;
+use crate::peripherals;
+
+const CH_COUNT: usize = peripheral_count!(DMA) * 8;
 const CH_STATUS_NONE: u8 = 0;
 const CH_STATUS_COMPLETED: u8 = 1;
 const CH_STATUS_ERROR: u8 = 2;
@@ -41,9 +46,8 @@ pub(crate) async unsafe fn transfer_m2p(
     src: &[u8],
     dst: *mut u8,
 ) {
-    let n = ch.num() as usize;
-    let r = ch.regs();
-    let c = r.st(ch.ch_num() as _);
+    let n = ch.num();
+    let c = ch.regs();
 
     // ndtr is max 16 bits.
     assert!(src.len() <= 0xFFFF);
@@ -82,106 +86,169 @@ pub(crate) async unsafe fn transfer_m2p(
 }
 
 unsafe fn on_irq() {
-    for (dman, &dma) in DMAS.iter().enumerate() {
-        for isrn in 0..2 {
-            let isr = dma.isr(isrn).read();
-            dma.ifcr(isrn).write_value(isr);
-
-            for chn in 0..4 {
-                let n = dman * 8 + isrn * 4 + chn;
-                if isr.teif(chn) {
-                    STATE.ch_status[n].store(CH_STATUS_ERROR, Ordering::Relaxed);
-                    STATE.ch_wakers[n].wake();
-                } else if isr.tcif(chn) {
-                    STATE.ch_status[n].store(CH_STATUS_COMPLETED, Ordering::Relaxed);
-                    STATE.ch_wakers[n].wake();
+    peripherals! {
+        (dma, $dma:ident) => {
+            for isrn in 0..2 {
+                let isr = pac::$dma.isr(isrn).read();
+                pac::$dma.ifcr(isrn).write_value(isr);
+                let dman = <peripherals::$dma as sealed::Dma>::num() as usize;
+
+                for chn in 0..4 {
+                    let n = dman * 8 + isrn * 4 + chn;
+                    if isr.teif(chn) {
+                        STATE.ch_status[n].store(CH_STATUS_ERROR, Ordering::Relaxed);
+                        STATE.ch_wakers[n].wake();
+                    } else if isr.tcif(chn) {
+                        STATE.ch_status[n].store(CH_STATUS_COMPLETED, Ordering::Relaxed);
+                        STATE.ch_wakers[n].wake();
+                    }
                 }
             }
-        }
+        };
     }
 }
 
-#[interrupt]
-unsafe fn DMA1_STREAM0() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM1() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM2() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM3() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM4() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM5() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM6() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA1_STREAM7() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA2_STREAM0() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA2_STREAM1() {
-    on_irq()
-}
-#[interrupt]
-unsafe fn DMA2_STREAM2() {
-    on_irq()
+/// safety: must be called only once
+pub(crate) unsafe fn init() {
+    interrupts! {
+        (DMA, $irq:ident) => {
+            interrupt::$irq::steal().enable();
+        };
+    }
 }
-#[interrupt]
-unsafe fn DMA2_STREAM3() {
-    on_irq()
+
+pub(crate) mod sealed {
+    use super::*;
+
+    pub trait Dma {
+        fn num() -> u8;
+        fn regs() -> &'static pac::dma::Dma;
+    }
+
+    pub trait Channel {
+        fn dma_regs() -> &'static pac::dma::Dma;
+
+        fn num(&self) -> usize;
+
+        fn ch_num(&self) -> u8;
+
+        fn regs(&self) -> pac::dma::St {
+            Self::dma_regs().st(self.ch_num() as _)
+        }
+    }
+
+    pub trait PeripheralChannel<PERI>: Channel {
+        fn request(&self) -> u8;
+    }
 }
-#[interrupt]
-unsafe fn DMA2_STREAM4() {
-    on_irq()
+
+pub trait Dma: sealed::Dma + Sized {}
+pub trait Channel: sealed::Channel + Sized {}
+pub trait PeripheralChannel<PERI>: sealed::PeripheralChannel<PERI> + Sized {}
+
+macro_rules! impl_dma {
+    ($peri:ident, $num:expr) => {
+        impl Dma for peripherals::$peri {}
+        impl sealed::Dma for peripherals::$peri {
+            fn num() -> u8 {
+                $num
+            }
+            fn regs() -> &'static pac::dma::Dma {
+                &pac::$peri
+            }
+        }
+    };
 }
-#[interrupt]
-unsafe fn DMA2_STREAM5() {
-    on_irq()
+
+macro_rules! impl_dma_channel {
+    ($channel_peri:ident, $dma_peri:ident, $dma_num:expr, $ch_num:expr) => {
+        impl Channel for peripherals::$channel_peri {}
+        impl sealed::Channel for peripherals::$channel_peri {
+            #[inline]
+            fn dma_regs() -> &'static pac::dma::Dma {
+                &crate::pac::$dma_peri
+            }
+
+            fn num(&self) -> usize {
+                ($dma_num * 8) + $ch_num
+            }
+
+            fn ch_num(&self) -> u8 {
+                $ch_num
+            }
+        }
+
+        impl<T> WriteDma<T> for peripherals::$channel_peri
+        where
+            Self: sealed::PeripheralChannel<T>,
+            T: 'static,
+        {
+            type WriteDmaFuture<'a> = impl Future<Output = ()>;
+
+            fn transfer<'a>(&'a mut self, buf: &'a [u8], dst: *mut u8) -> Self::WriteDmaFuture<'a>
+            where
+                T: 'a,
+            {
+                let request = sealed::PeripheralChannel::<T>::request(self);
+                unsafe { transfer_m2p(self, request, buf, dst) }
+            }
+        }
+    };
 }
-#[interrupt]
-unsafe fn DMA2_STREAM6() {
-    on_irq()
+
+peripherals! {
+    (dma, DMA1) => {
+        impl_dma!(DMA1, 0);
+        dma_channels! {
+            ($channel_peri:ident, DMA1, $channel_num:expr) => {
+                impl_dma_channel!($channel_peri, DMA1, 0, $channel_num);
+            };
+        }
+    };
+    (dma, DMA2) => {
+        impl_dma!(DMA2, 1);
+        dma_channels! {
+            ($channel_peri:ident, DMA2, $channel_num:expr) => {
+                impl_dma_channel!($channel_peri, DMA2, 1, $channel_num);
+            };
+        }
+    };
 }
-#[interrupt]
-unsafe fn DMA2_STREAM7() {
-    on_irq()
+
+interrupts! {
+    (DMA, $irq:ident) => {
+        unsafe fn $irq () {
+            on_irq()
+        }
+    };
 }
 
-/// safety: must be called only once
-pub(crate) unsafe fn init() {
-    interrupt::DMA1_STREAM0::steal().enable();
-    interrupt::DMA1_STREAM1::steal().enable();
-    interrupt::DMA1_STREAM2::steal().enable();
-    interrupt::DMA1_STREAM3::steal().enable();
-    interrupt::DMA1_STREAM4::steal().enable();
-    interrupt::DMA1_STREAM5::steal().enable();
-    interrupt::DMA1_STREAM6::steal().enable();
-    interrupt::DMA1_STREAM7::steal().enable();
-    interrupt::DMA2_STREAM0::steal().enable();
-    interrupt::DMA2_STREAM1::steal().enable();
-    interrupt::DMA2_STREAM2::steal().enable();
-    interrupt::DMA2_STREAM3::steal().enable();
-    interrupt::DMA2_STREAM4::steal().enable();
-    interrupt::DMA2_STREAM5::steal().enable();
-    interrupt::DMA2_STREAM6::steal().enable();
-    interrupt::DMA2_STREAM7::steal().enable();
+#[cfg(usart)]
+use crate::usart;
+peripheral_dma_channels! {
+    ($peri:ident, usart, $kind:ident, RX, $channel_peri:ident, $dma_peri:ident, $channel_num:expr, $event_num:expr) => {
+        impl usart::RxDma<peripherals::$peri> for peripherals::$channel_peri { }
+        impl usart::sealed::RxDma<peripherals::$peri> for peripherals::$channel_peri { }
+
+        impl sealed::PeripheralChannel<peripherals::$peri> for peripherals::$channel_peri {
+            fn request(&self) -> u8 {
+                $event_num
+            }
+        }
+
+        impl PeripheralChannel<peripherals::$peri> for peripherals::$channel_peri { }
+    };
+
+    ($peri:ident, usart, $kind:ident, TX, $channel_peri:ident, $dma_peri:ident, $channel_num:expr, $event_num:expr) => {
+        impl usart::TxDma<peripherals::$peri> for peripherals::$channel_peri { }
+        impl usart::sealed::TxDma<peripherals::$peri> for peripherals::$channel_peri { }
+
+        impl sealed::PeripheralChannel<peripherals::$peri> for peripherals::$channel_peri {
+            fn request(&self) -> u8 {
+                $event_num
+            }
+        }
+
+        impl PeripheralChannel<peripherals::$peri> for peripherals::$channel_peri { }
+    };
 }
diff --git a/embassy-stm32/src/lib.rs b/embassy-stm32/src/lib.rs
index 9ba7bbe4c..813c58cd7 100644
--- a/embassy-stm32/src/lib.rs
+++ b/embassy-stm32/src/lib.rs
@@ -22,6 +22,8 @@ pub mod rcc;
 // Sometimes-present hardware
 #[cfg(adc)]
 pub mod adc;
+#[cfg(bdma)]
+pub mod bdma;
 #[cfg(timer)]
 pub mod clock;
 #[cfg(dac)]
diff --git a/embassy-stm32/src/usart/mod.rs b/embassy-stm32/src/usart/mod.rs
index adf48c326..24793b6b1 100644
--- a/embassy-stm32/src/usart/mod.rs
+++ b/embassy-stm32/src/usart/mod.rs
@@ -1,7 +1,7 @@
 #![macro_use]
 
 #[cfg_attr(usart_v1, path = "v1.rs")]
-#[cfg_attr(usart_v2, path = "v2.rs")]
+//#[cfg_attr(usart_v2, path = "v2.rs")]
 mod _version;
 use crate::peripherals;
 pub use _version::*;
@@ -25,6 +25,7 @@ pub enum Error {
 
 pub(crate) mod sealed {
     use super::*;
+    use crate::dma::WriteDma;
 
     pub trait Instance {
         fn regs(&self) -> Usart;
@@ -44,7 +45,12 @@ pub(crate) mod sealed {
     pub trait CkPin<T: Instance>: Pin {
         fn af_num(&self) -> u8;
     }
+
+    pub trait RxDma<T: Instance> {}
+
+    pub trait TxDma<T: Instance>: WriteDma<T> {}
 }
+
 pub trait Instance: sealed::Instance {}
 pub trait RxPin<T: Instance>: sealed::RxPin<T> {}
 pub trait TxPin<T: Instance>: sealed::TxPin<T> {}
@@ -52,6 +58,9 @@ pub trait CtsPin<T: Instance>: sealed::CtsPin<T> {}
 pub trait RtsPin<T: Instance>: sealed::RtsPin<T> {}
 pub trait CkPin<T: Instance>: sealed::CkPin<T> {}
 
+pub trait RxDma<T: Instance>: sealed::RxDma<T> {}
+pub trait TxDma<T: Instance>: sealed::TxDma<T> {}
+
 crate::pac::peripherals!(
     (usart, $inst:ident) => {
         impl sealed::Instance for peripherals::$inst {
diff --git a/embassy-stm32/src/usart/v1.rs b/embassy-stm32/src/usart/v1.rs
index 1ec1f5b30..a721e89a6 100644
--- a/embassy-stm32/src/usart/v1.rs
+++ b/embassy-stm32/src/usart/v1.rs
@@ -104,11 +104,16 @@ impl<'d, T: Instance> Uart<'d, T> {
     #[cfg(dma_v2)]
     pub async fn write_dma(
         &mut self,
-        ch: &mut impl crate::dma::Channel,
+        //ch: &mut impl crate::dma::Channel,
+        ch: &mut impl TxDma<T>,
         buffer: &[u8],
     ) -> Result<(), Error> {
-        let ch_func = 4; // USART3_TX
         let r = self.inner.regs();
+        let dst = r.dr().ptr() as *mut u8;
+        ch.transfer(buffer, dst).await;
+        Ok(())
+        /*
+        let ch_func = 4; // USART3_TX
 
         unsafe {
             r.cr3().write(|w| {
@@ -121,6 +126,7 @@ impl<'d, T: Instance> Uart<'d, T> {
         }
 
         Ok(())
+         */
     }
 
     pub fn read(&mut self, buffer: &mut [u8]) -> Result<(), Error> {
diff --git a/stm32-metapac/Cargo.toml b/stm32-metapac/Cargo.toml
index bed772c81..79f1c3746 100644
--- a/stm32-metapac/Cargo.toml
+++ b/stm32-metapac/Cargo.toml
@@ -12,6 +12,7 @@ cortex-m-rt = { version = "0.6.8", optional = true }
 # These are removed when generating the pre-generated crate using the tool at gen/.
 [build-dependencies]
 stm32-metapac-gen = { path = "./gen" }
+regex = "1.5.4"
 # END BUILD DEPENDENCIES
 
 [features]
diff --git a/stm32-metapac/gen/src/lib.rs b/stm32-metapac/gen/src/lib.rs
index 408865e31..00e122e90 100644
--- a/stm32-metapac/gen/src/lib.rs
+++ b/stm32-metapac/gen/src/lib.rs
@@ -48,7 +48,7 @@ pub struct Peripheral {
     #[serde(default)]
     pub pins: Vec<Pin>,
     #[serde(default)]
-    pub dma_channels: HashMap<String, Vec<String>>,
+    pub dma_channels: HashMap<String, Vec<PeripheralDmaChannel>>,
     #[serde(default)]
     pub dma_requests: HashMap<String, u32>,
 }
@@ -66,6 +66,12 @@ pub struct DmaChannel {
     pub channel: u32,
 }
 
+#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Hash)]
+pub struct PeripheralDmaChannel {
+    pub channel: String,
+    pub request: Option<u32>,
+}
+
 struct BlockInfo {
     /// usart_v1/USART -> usart
     module: String,
@@ -121,6 +127,21 @@ fn find_reg_for_field<'c>(
     })
 }
 
+fn make_peripheral_counts(out: &mut String, data: &HashMap<String, u8>) {
+    write!(out,
+           "#[macro_export]
+macro_rules! peripheral_count {{
+    ").unwrap();
+    for (name, count) in data {
+        write!(out,
+            "({}) => ({});\n",
+            name, count,
+        ).unwrap();
+    }
+    write!(out,
+           " }}\n").unwrap();
+}
+
 fn make_table(out: &mut String, name: &str, data: &Vec<Vec<String>>) {
     write!(
         out,
@@ -234,6 +255,7 @@ pub fn gen(options: Options) {
         let mut dma_channels_table: Vec<Vec<String>> = Vec::new();
         let mut dma_requests_table: Vec<Vec<String>> = Vec::new();
         let mut peripheral_dma_channels_table: Vec<Vec<String>> = Vec::new();
+        let mut peripheral_counts: HashMap<String, u8> = HashMap::new();
 
         let dma_base = core
             .peripherals
@@ -248,12 +270,20 @@ pub fn gen(options: Options) {
         for (id, channel_info) in &core.dma_channels {
             let mut row = Vec::new();
             row.push(id.clone());
-            row.push(channel_info.dma.clone() );
+            row.push(channel_info.dma.clone());
             row.push(channel_info.channel.to_string());
             dma_channels_table.push(row);
         }
 
+        let number_suffix_re = Regex::new("^(.*?)[0-9]*$").unwrap();
+
         for (name, p) in &core.peripherals {
+            let captures = number_suffix_re.captures(&name).unwrap();
+            let root_peri_name = captures.get(1).unwrap().as_str().to_string();
+            peripheral_counts.insert(
+                root_peri_name.clone(),
+                peripheral_counts.get(&root_peri_name).map_or(1, |v| v + 1),
+            );
             let mut ir_peri = ir::Peripheral {
                 name: name.clone(),
                 array: None,
@@ -291,12 +321,15 @@ pub fn gen(options: Options) {
                     for channel in dma_channels.iter() {
                         let mut row = Vec::new();
                         row.push(name.clone());
-                        row.push( bi.module.clone() );
-                        row.push( bi.block.clone() );
+                        row.push(bi.module.clone());
+                        row.push(bi.block.clone());
                         row.push(event.clone());
-                        row.push( channel.clone() );
-                        row.push( core.dma_channels[channel].dma.clone() );
-                        row.push( core.dma_channels[channel].channel.to_string() );
+                        row.push(channel.channel.clone());
+                        row.push(core.dma_channels[&channel.channel].dma.clone());
+                        row.push(core.dma_channels[&channel.channel].channel.to_string());
+                        if let Some(request) = channel.request {
+                            row.push(request.to_string());
+                        }
                         peripheral_dma_channels_table.push(row);
                     }
                 }
@@ -421,7 +454,17 @@ pub fn gen(options: Options) {
                 value: num,
             });
 
-            interrupt_table.push(vec![name.to_ascii_uppercase()]);
+            let name = name.to_ascii_uppercase();
+
+            interrupt_table.push(vec![name.clone()]);
+
+            if name.starts_with("DMA") || name.contains("_DMA") {
+                interrupt_table.push(vec!["DMA".to_string(), name.clone()]);
+            }
+
+            if name.contains("EXTI") {
+                interrupt_table.push(vec!["EXTI".to_string(), name.clone()]);
+            }
         }
 
         ir.devices.insert("".to_string(), dev);
@@ -429,11 +472,8 @@ pub fn gen(options: Options) {
         let mut extra = format!(
             "pub fn GPIO(n: usize) -> gpio::Gpio {{
             gpio::Gpio(({} + {}*n) as _)
-        }}
-        pub fn DMA(n: usize) -> dma::Dma {{
-            dma::Dma(({} + {}*n) as _)
         }}",
-            gpio_base, gpio_stride, dma_base, dma_stride,
+            gpio_base, gpio_stride,
         );
 
         let peripheral_version_table = peripheral_versions
@@ -450,6 +490,7 @@ pub fn gen(options: Options) {
         make_table(&mut extra, "peripheral_rcc", &peripheral_rcc_table);
         make_table(&mut extra, "dma_channels", &dma_channels_table);
         make_table(&mut extra, "dma_requests", &dma_requests_table);
+        make_peripheral_counts(&mut extra, &peripheral_counts);
 
         for (module, version) in peripheral_versions {
             all_peripheral_versions.insert((module.clone(), version.clone()));