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stm32: move dma trait impls from macrotables to build.rs

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This commit is contained in:
Dario Nieuwenhuis 2022-02-23 18:55:16 +01:00
parent bc053404ca
commit b4abb1f5c2
6 changed files with 60 additions and 47 deletions
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57
embassy-stm32/build.rs
View File

@ -1,6 +1,6 @@
use proc_macro2::TokenStream;
use quote::{format_ident, quote};
use std::collections::HashSet;
use std::collections::{HashMap, HashSet};
use std::env;
use std::fs;
use std::path::PathBuf;
@ -230,6 +230,61 @@ fn main() {
})
}
// ========
// Generate dma_trait_impl!
let signals: HashMap<_, _> = [
// (kind, signal) => trait
(("usart", "RX"), quote!(crate::usart::RxDma)),
(("usart", "TX"), quote!(crate::usart::TxDma)),
(("spi", "RX"), quote!(crate::spi::RxDma)),
(("spi", "TX"), quote!(crate::spi::TxDma)),
(("i2c", "RX"), quote!(crate::i2c::RxDma)),
(("i2c", "TX"), quote!(crate::i2c::TxDma)),
(("dcmi", "DCMI"), quote!(crate::dcmi::FrameDma)),
(("dcmi", "PSSI"), quote!(crate::dcmi::FrameDma)),
]
.into();
for p in METADATA.peripherals {
if let Some(regs) = &p.registers {
let mut dupe = HashSet::new();
for ch in p.dma_channels {
// Some chips have multiple request numbers for the same (peri, signal, channel) combos.
// Ignore the dupes, picking the first one. Otherwise this causes conflicting trait impls
let key = (ch.signal, ch.channel);
if !dupe.insert(key) {
continue;
}
if let Some(tr) = signals.get(&(regs.kind, ch.signal)) {
let peri = format_ident!("{}", p.name);
let channel = if let Some(channel) = &ch.channel {
let channel = format_ident!("{}", channel);
quote!({channel: #channel})
} else if let Some(dmamux) = &ch.dmamux {
let dmamux = format_ident!("{}", dmamux);
quote!({dmamux: #dmamux})
} else {
unreachable!();
};
let request = if let Some(request) = ch.request {
let request = request as u8;
quote!(#request)
} else {
quote!(())
};
g.extend(quote! {
dma_trait_impl!(#tr, #peri, #channel, #request);
});
}
}
}
}
// ========
// Write generated.rs

9
embassy-stm32/src/dcmi.rs
View File

@ -482,15 +482,6 @@ crate::pac::interrupts! {
dma_trait!(FrameDma, Instance);
crate::pac::peripheral_dma_channels! {
($peri:ident, dcmi, $kind:ident, PSSI, $channel:tt, $request:expr) => {
dma_trait_impl!(FrameDma, $peri, $channel, $request);
};
($peri:ident, dcmi, $kind:ident, DCMI, $channel:tt, $request:expr) => {
dma_trait_impl!(FrameDma, $peri, $channel, $request);
};
}
crate::pac::peripheral_pins!(
($inst:ident, dcmi, DCMI, $pin:ident, D0, $af:expr) => {
pin_trait_impl!(D0Pin, $inst, $pin, $af);

9
embassy-stm32/src/i2c/mod.rs
View File

@ -91,12 +91,3 @@ crate::pac::peripheral_pins!(
pin_trait_impl!(SdaPin, $inst, $pin, 0);
};
);
crate::pac::peripheral_dma_channels! {
($peri:ident, i2c, $kind:ident, RX, $channel:tt, $request:expr) => {
dma_trait_impl!(RxDma, $peri, $channel, $request);
};
($peri:ident, i2c, $kind:ident, TX, $channel:tt, $request:expr) => {
dma_trait_impl!(TxDma, $peri, $channel, $request);
};
}

9
embassy-stm32/src/spi/mod.rs
View File

@ -911,12 +911,3 @@ crate::pac::peripheral_pins!(
pin_trait_impl!(MisoPin, $inst, $pin, 0);
};
);
crate::pac::peripheral_dma_channels! {
($peri:ident, spi, $kind:ident, RX, $channel:tt, $request:expr) => {
dma_trait_impl!(RxDma, $peri, $channel, $request);
};
($peri:ident, spi, $kind:ident, TX, $channel:tt, $request:expr) => {
dma_trait_impl!(TxDma, $peri, $channel, $request);
};
}

8
embassy-stm32/src/traits.rs
View File

@ -31,8 +31,8 @@ macro_rules! dma_trait {
#[allow(unused)]
macro_rules! dma_trait_impl {
// DMAMUX
($signal:ident, $instance:ident, {dmamux: $dmamux:ident}, $request:expr) => {
impl<T> $signal<crate::peripherals::$instance> for T
(crate::$mod:ident::$trait:ident, $instance:ident, {dmamux: $dmamux:ident}, $request:expr) => {
impl<T> crate::$mod::$trait<crate::peripherals::$instance> for T
where
T: crate::dma::MuxChannel<Mux = crate::dma::$dmamux>,
{
@ -43,8 +43,8 @@ macro_rules! dma_trait_impl {
};
// No DMAMUX
($signal:ident, $instance:ident, {channel: $channel:ident}, $request:expr) => {
impl $signal<crate::peripherals::$instance> for crate::peripherals::$channel {
(crate::$mod:ident::$trait:ident, $instance:ident, {channel: $channel:ident}, $request:expr) => {
impl crate::$mod::$trait<crate::peripherals::$instance> for crate::peripherals::$channel {
fn request(&self) -> crate::dma::Request {
$request
}

15
embassy-stm32/src/usart/mod.rs
View File

@ -712,18 +712,3 @@ crate::pac::peripheral_pins!(
pin_trait_impl!(CkPin, $inst, $pin, 0);
};
);
crate::pac::peripheral_dma_channels! {
($peri:ident, usart, $kind:ident, RX, $channel:tt, $request:expr) => {
dma_trait_impl!(RxDma, $peri, $channel, $request);
};
($peri:ident, usart, $kind:ident, TX, $channel:tt, $request:expr) => {
dma_trait_impl!(TxDma, $peri, $channel, $request);
};
($peri:ident, uart, $kind:ident, RX, $channel:tt, $request:expr) => {
dma_trait_impl!(RxDma, $peri, $channel, $request);
};
($peri:ident, uart, $kind:ident, TX, $channel:tt, $request:expr) => {
dma_trait_impl!(TxDma, $peri, $channel, $request);
};
}