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dma

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This commit is contained in:
Henrik Alsér 2022-08-29 00:30:50 +02:00 committed by Henrik Alsér
parent 838f3065ea
commit e7d4bf258a
1 changed files with 75 additions and 16 deletions
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91
embassy-rp/src/spi.rs
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@ -1,7 +1,10 @@
use core::marker::PhantomData;
use embassy_embedded_hal::SetConfig;
use embassy_hal_common::{into_ref, PeripheralRef};
pub use embedded_hal_02::spi::{Phase, Polarity};
use crate::dma::{AnyChannel, Channel};
use crate::gpio::sealed::Pin as _;
use crate::gpio::{AnyPin, Pin as GpioPin};
use crate::{pac, peripherals, Peripheral};
@ -30,8 +33,11 @@ impl Default for Config {
}
}
pub struct Spi<'d, T: Instance> {
pub struct Spi<'d, T: Instance, M: Mode> {
inner: PeripheralRef<'d, T>,
tx_dma: Option<PeripheralRef<'d, AnyChannel>>,
rx_dma: Option<PeripheralRef<'d, AnyChannel>>,
phantom: PhantomData<(&'d mut T, M)>,
}
fn div_roundup(a: u32, b: u32) -> u32 {
@ -57,9 +63,11 @@ fn calc_prescs(freq: u32) -> (u8, u8) {
((presc * 2) as u8, (postdiv - 1) as u8)
}
impl<'d, T: Instance> Spi<'d, T> {
impl<'d, T: Instance, M: Mode> Spi<'d, T, M> {
pub fn new(
inner: impl Peripheral<P = T> + 'd,
tx_dma: Option<PeripheralRef<'d, AnyChannel>>,
rx_dma: Option<PeripheralRef<'d, AnyChannel>>,
clk: impl Peripheral<P = impl ClkPin<T> + 'd> + 'd,
mosi: impl Peripheral<P = impl MosiPin<T> + 'd> + 'd,
miso: impl Peripheral<P = impl MisoPin<T> + 'd> + 'd,
@ -68,6 +76,8 @@ impl<'d, T: Instance> Spi<'d, T> {
into_ref!(clk, mosi, miso);
Self::new_inner(
inner,
tx_dma,
rx_dma,
Some(clk.map_into()),
Some(mosi.map_into()),
Some(miso.map_into()),
@ -78,26 +88,48 @@ impl<'d, T: Instance> Spi<'d, T> {
pub fn new_txonly(
inner: impl Peripheral<P = T> + 'd,
tx_dma: Option<PeripheralRef<'d, AnyChannel>>,
clk: impl Peripheral<P = impl ClkPin<T> + 'd> + 'd,
mosi: impl Peripheral<P = impl MosiPin<T> + 'd> + 'd,
config: Config,
) -> Self {
into_ref!(clk, mosi);
Self::new_inner(inner, Some(clk.map_into()), Some(mosi.map_into()), None, None, config)
Self::new_inner(
inner,
tx_dma,
None,
Some(clk.map_into()),
Some(mosi.map_into()),
None,
None,
config,
)
}
pub fn new_rxonly(
inner: impl Peripheral<P = T> + 'd,
rx_dma: Option<PeripheralRef<'d, AnyChannel>>,
clk: impl Peripheral<P = impl ClkPin<T> + 'd> + 'd,
miso: impl Peripheral<P = impl MisoPin<T> + 'd> + 'd,
config: Config,
) -> Self {
into_ref!(clk, miso);
Self::new_inner(inner, Some(clk.map_into()), None, Some(miso.map_into()), None, config)
Self::new_inner(
inner,
None,
rx_dma,
Some(clk.map_into()),
None,
Some(miso.map_into()),
None,
config,
)
}
fn new_inner(
inner: impl Peripheral<P = T> + 'd,
tx_dma: Option<PeripheralRef<'d, AnyChannel>>,
rx_dma: Option<PeripheralRef<'d, AnyChannel>>,
clk: Option<PeripheralRef<'d, AnyPin>>,
mosi: Option<PeripheralRef<'d, AnyPin>>,
miso: Option<PeripheralRef<'d, AnyPin>>,
@ -134,7 +166,12 @@ impl<'d, T: Instance> Spi<'d, T> {
pin.io().ctrl().write(|w| w.set_funcsel(1));
}
}
Self { inner }
Self {
inner,
tx_dma,
rx_dma,
phantom: PhantomData,
}
}
pub fn blocking_write(&mut self, data: &[u8]) -> Result<(), Error> {
@ -228,16 +265,25 @@ impl<'d, T: Instance> Spi<'d, T> {
mod sealed {
use super::*;
pub trait Mode {}
pub trait Instance {
const TX_DREQ: u8;
const RX_DREQ: u8;
fn regs(&self) -> pac::spi::Spi;
}
}
pub trait Mode: sealed::Mode {}
pub trait Instance: sealed::Instance {}
macro_rules! impl_instance {
($type:ident, $irq:ident) => {
($type:ident, $irq:ident, $tx_dreq:expr, $rx_dreq:expr) => {
impl sealed::Instance for peripherals::$type {
const TX_DREQ: u8 = $tx_dreq;
const RX_DREQ: u8 = $rx_dreq;
fn regs(&self) -> pac::spi::Spi {
pac::$type
}
@ -246,8 +292,8 @@ macro_rules! impl_instance {
};
}
impl_instance!(SPI0, Spi0);
impl_instance!(SPI1, Spi1);
impl_instance!(SPI0, Spi0, 16, 17);
impl_instance!(SPI1, Spi1, 18, 19);
pub trait ClkPin<T: Instance>: GpioPin {}
pub trait CsPin<T: Instance>: GpioPin {}
@ -281,12 +327,25 @@ impl_pin!(PIN_17, SPI0, CsPin);
impl_pin!(PIN_18, SPI0, ClkPin);
impl_pin!(PIN_19, SPI0, MosiPin);
macro_rules! impl_mode {
($name:ident) => {
impl sealed::Mode for $name {}
impl Mode for $name {}
};
}
pub struct Blocking;
pub struct Async;
impl_mode!(Blocking);
impl_mode!(Async);
// ====================
mod eh02 {
use super::*;
impl<'d, T: Instance> embedded_hal_02::blocking::spi::Transfer<u8> for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::spi::Transfer<u8> for Spi<'d, T, M> {
type Error = Error;
fn transfer<'w>(&mut self, words: &'w mut [u8]) -> Result<&'w [u8], Self::Error> {
self.blocking_transfer_in_place(words)?;
@ -294,7 +353,7 @@ mod eh02 {
}
}
impl<'d, T: Instance> embedded_hal_02::blocking::spi::Write<u8> for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_02::blocking::spi::Write<u8> for Spi<'d, T, M> {
type Error = Error;
fn write(&mut self, words: &[u8]) -> Result<(), Self::Error> {
@ -313,29 +372,29 @@ mod eh1 {
}
}
impl<'d, T: Instance> embedded_hal_1::spi::ErrorType for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_1::spi::ErrorType for Spi<'d, T, M> {
type Error = Error;
}
impl<'d, T: Instance> embedded_hal_1::spi::blocking::SpiBusFlush for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_1::spi::blocking::SpiBusFlush for Spi<'d, T, M> {
fn flush(&mut self) -> Result<(), Self::Error> {
Ok(())
}
}
impl<'d, T: Instance> embedded_hal_1::spi::blocking::SpiBusRead<u8> for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_1::spi::blocking::SpiBusRead<u8> for Spi<'d, T, M> {
fn read(&mut self, words: &mut [u8]) -> Result<(), Self::Error> {
self.blocking_transfer(words, &[])
}
}
impl<'d, T: Instance> embedded_hal_1::spi::blocking::SpiBusWrite<u8> for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_1::spi::blocking::SpiBusWrite<u8> for Spi<'d, T, M> {
fn write(&mut self, words: &[u8]) -> Result<(), Self::Error> {
self.blocking_write(words)
}
}
impl<'d, T: Instance> embedded_hal_1::spi::blocking::SpiBus<u8> for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> embedded_hal_1::spi::blocking::SpiBus<u8> for Spi<'d, T, M> {
fn transfer(&mut self, read: &mut [u8], write: &[u8]) -> Result<(), Self::Error> {
self.blocking_transfer(read, write)
}
@ -346,7 +405,7 @@ mod eh1 {
}
}
impl<'d, T: Instance> SetConfig for Spi<'d, T> {
impl<'d, T: Instance, M: Mode> SetConfig for Spi<'d, T, M> {
type Config = Config;
fn set_config(&mut self, config: &Self::Config) {
let p = self.inner.regs();