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Remove Pin from SPI

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This commit is contained in:
Dario Nieuwenhuis
2021-04-14 16:37:10 +02:00
parent 8b1ffb2cb7
commit c15411d1bd
4 changed files with 76 additions and 59 deletions
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56
embassy-stm32/src/f4/spi.rs
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@@ -214,14 +214,13 @@ where
type ReadFuture<'a> = impl Future<Output = Result<(), Error>> + 'a;
type WriteReadFuture<'a> = impl Future<Output = Result<(), Error>> + 'a;
fn read<'a>(self: Pin<&'a mut Self>, buf: &'a mut [u8]) -> Self::ReadFuture<'a> {
let this = unsafe { self.get_unchecked_mut() };
fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> Self::ReadFuture<'a> {
#[allow(mutable_transmutes)]
let static_buf: &'static mut [u8] = unsafe { mem::transmute(buf) };
async move {
let rx_stream = this.rx_stream.take().unwrap();
let spi = this.spi.take().unwrap();
let rx_stream = self.rx_stream.take().unwrap();
let spi = self.spi.take().unwrap();
spi.cr2.modify(|_, w| w.errie().set_bit());
@@ -236,8 +235,8 @@ where
.double_buffer(false),
);
let fut = InterruptFuture::new(&mut this.rx_int);
let fut_err = InterruptFuture::new(&mut this.spi_int);
let fut = InterruptFuture::new(&mut self.rx_int);
let fut_err = InterruptFuture::new(&mut self.spi_int);
rx_transfer.start(|_spi| {});
future::select(fut, fut_err).await;
@@ -245,21 +244,20 @@ where
let (rx_stream, spi, _buf, _) = rx_transfer.free();
spi.cr2.modify(|_, w| w.errie().clear_bit());
this.rx_stream.replace(rx_stream);
this.spi.replace(spi);
self.rx_stream.replace(rx_stream);
self.spi.replace(spi);
Ok(())
}
}
fn write<'a>(self: Pin<&'a mut Self>, buf: &'a [u8]) -> Self::WriteFuture<'a> {
let this = unsafe { self.get_unchecked_mut() };
fn write<'a>(&'a mut self, buf: &'a [u8]) -> Self::WriteFuture<'a> {
#[allow(mutable_transmutes)]
let static_buf: &'static mut [u8] = unsafe { mem::transmute(buf) };
async move {
let tx_stream = this.tx_stream.take().unwrap();
let spi = this.spi.take().unwrap();
let tx_stream = self.tx_stream.take().unwrap();
let spi = self.spi.take().unwrap();
// let mut tx_transfer = Transfer::init(
// tx_stream,
@@ -272,7 +270,7 @@ where
// .double_buffer(false),
// );
//
// let fut = InterruptFuture::new(&mut this.tx_int);
// let fut = InterruptFuture::new(&mut self.tx_int);
//
// tx_transfer.start(|_spi| {});
// fut.await;
@@ -284,28 +282,26 @@ where
nb::block!(write_sr(&spi, byte));
}
this.tx_stream.replace(tx_stream);
this.spi.replace(spi);
self.tx_stream.replace(tx_stream);
self.spi.replace(spi);
Ok(())
}
}
fn read_write<'a>(
self: Pin<&'a mut Self>,
&'a mut self,
read_buf: &'a mut [u8],
write_buf: &'a [u8],
) -> Self::WriteReadFuture<'a> {
let this = unsafe { self.get_unchecked_mut() };
#[allow(mutable_transmutes)]
let write_static_buf: &'static mut [u8] = unsafe { mem::transmute(write_buf) };
let read_static_buf: &'static mut [u8] = unsafe { mem::transmute(read_buf) };
async move {
let tx_stream = this.tx_stream.take().unwrap();
let rx_stream = this.rx_stream.take().unwrap();
let spi_tx = this.spi.take().unwrap();
let tx_stream = self.tx_stream.take().unwrap();
let rx_stream = self.rx_stream.take().unwrap();
let spi_tx = self.spi.take().unwrap();
let spi_rx: SPI = unsafe { mem::transmute_copy(&spi_tx) };
spi_rx
@@ -334,9 +330,9 @@ where
// .double_buffer(false),
// );
//
// let tx_fut = InterruptFuture::new(&mut this.tx_int);
// let rx_fut = InterruptFuture::new(&mut this.rx_int);
// let rx_fut_err = InterruptFuture::new(&mut this.spi_int);
// let tx_fut = InterruptFuture::new(&mut self.tx_int);
// let rx_fut = InterruptFuture::new(&mut self.rx_int);
// let rx_fut_err = InterruptFuture::new(&mut self.spi_int);
//
// rx_transfer.start(|_spi| {});
// tx_transfer.start(|_spi| {});
@@ -352,7 +348,7 @@ where
for i in 0..(read_static_buf.len() - 1) {
let byte = write_static_buf[i];
loop {
let fut = InterruptFuture::new(&mut this.spi_int);
let fut = InterruptFuture::new(&mut self.spi_int);
match write_sr(&spi_tx, byte) {
Ok(()) => break,
_ => {}
@@ -361,7 +357,7 @@ where
}
loop {
let fut = InterruptFuture::new(&mut this.spi_int);
let fut = InterruptFuture::new(&mut self.spi_int);
match read_sr(&spi_tx) {
Ok(byte) => {
read_static_buf[i] = byte;
@@ -381,9 +377,9 @@ where
.rxneie()
.clear_bit()
});
this.rx_stream.replace(rx_stream);
this.tx_stream.replace(tx_stream);
this.spi.replace(spi_rx);
self.rx_stream.replace(rx_stream);
self.tx_stream.replace(tx_stream);
self.spi.replace(spi_rx);
Ok(())
}
@@ -421,7 +417,7 @@ macro_rules! spi {
impl Instance for pac::$SPI {
unsafe fn enable_clock() {
const EN_BIT: u8 = $en;
// NOTE(unsafe) this reference will only be used for atomic writes with no side effects.
// NOTE(unsafe) self reference will only be used for atomic writes with no side effects.
let rcc = &(*pac::RCC::ptr());
// Enable clock.
bb::set(&rcc.$apbXenr, EN_BIT);