158 lines
4.1 KiB
Rust
158 lines
4.1 KiB
Rust
#![macro_use]
|
|
|
|
use futures::future::join;
|
|
|
|
use super::*;
|
|
use crate::dma::{slice_ptr_parts, slice_ptr_parts_mut, Transfer};
|
|
|
|
impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
|
|
pub(super) async fn write_dma_u8(&mut self, write: *const [u8]) -> Result<(), Error>
|
|
where
|
|
Tx: TxDma<T>,
|
|
{
|
|
self.set_word_size(WordSize::EightBit);
|
|
unsafe {
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_spe(false);
|
|
});
|
|
|
|
// Flush the read buffer to avoid errornous data from being read
|
|
while T::regs().sr().read().rxp() {
|
|
let _ = T::regs().rxdr().read();
|
|
}
|
|
}
|
|
|
|
let tx_request = self.txdma.request();
|
|
let tx_dst = T::regs().tx_ptr();
|
|
unsafe { self.txdma.start_write(tx_request, write, tx_dst) }
|
|
let tx_f = Transfer::new(&mut self.txdma);
|
|
|
|
unsafe {
|
|
T::regs().cfg1().modify(|reg| {
|
|
reg.set_txdmaen(true);
|
|
});
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_spe(true);
|
|
});
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_cstart(true);
|
|
});
|
|
}
|
|
|
|
tx_f.await;
|
|
|
|
finish_dma(T::regs());
|
|
|
|
Ok(())
|
|
}
|
|
|
|
pub(super) async fn read_dma_u8(&mut self, read: *mut [u8]) -> Result<(), Error>
|
|
where
|
|
Tx: TxDma<T>,
|
|
Rx: RxDma<T>,
|
|
{
|
|
self.set_word_size(WordSize::EightBit);
|
|
unsafe {
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_spe(false);
|
|
});
|
|
T::regs().cfg1().modify(|reg| {
|
|
reg.set_rxdmaen(true);
|
|
});
|
|
}
|
|
|
|
let (_, clock_byte_count) = slice_ptr_parts_mut(read);
|
|
|
|
let rx_request = self.rxdma.request();
|
|
let rx_src = T::regs().rx_ptr();
|
|
unsafe { self.rxdma.start_read(rx_request, rx_src, read) };
|
|
let rx_f = Transfer::new(&mut self.rxdma);
|
|
|
|
let tx_request = self.txdma.request();
|
|
let tx_dst = T::regs().tx_ptr();
|
|
let clock_byte = 0x00u8;
|
|
let tx_f = crate::dma::write_repeated(
|
|
&mut self.txdma,
|
|
tx_request,
|
|
clock_byte,
|
|
clock_byte_count,
|
|
tx_dst,
|
|
);
|
|
|
|
unsafe {
|
|
T::regs().cfg1().modify(|reg| {
|
|
reg.set_txdmaen(true);
|
|
});
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_spe(true);
|
|
});
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_cstart(true);
|
|
});
|
|
}
|
|
|
|
join(tx_f, rx_f).await;
|
|
|
|
finish_dma(T::regs());
|
|
|
|
Ok(())
|
|
}
|
|
|
|
pub(super) async fn transfer_dma_u8(
|
|
&mut self,
|
|
read: *mut [u8],
|
|
write: *const [u8],
|
|
) -> Result<(), Error>
|
|
where
|
|
Tx: TxDma<T>,
|
|
Rx: RxDma<T>,
|
|
{
|
|
let (_, rx_len) = slice_ptr_parts(read);
|
|
let (_, tx_len) = slice_ptr_parts(write);
|
|
assert_eq!(rx_len, tx_len);
|
|
|
|
self.set_word_size(WordSize::EightBit);
|
|
unsafe {
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_spe(false);
|
|
});
|
|
T::regs().cfg1().modify(|reg| {
|
|
reg.set_rxdmaen(true);
|
|
});
|
|
|
|
// Flush the read buffer to avoid errornous data from being read
|
|
while T::regs().sr().read().rxp() {
|
|
let _ = T::regs().rxdr().read();
|
|
}
|
|
}
|
|
|
|
let rx_request = self.rxdma.request();
|
|
let rx_src = T::regs().rx_ptr();
|
|
unsafe { self.rxdma.start_read(rx_request, rx_src, read) };
|
|
let rx_f = Transfer::new(&mut self.rxdma);
|
|
|
|
let tx_request = self.txdma.request();
|
|
let tx_dst = T::regs().tx_ptr();
|
|
unsafe { self.txdma.start_write(tx_request, write, tx_dst) }
|
|
let tx_f = Transfer::new(&mut self.txdma);
|
|
|
|
unsafe {
|
|
T::regs().cfg1().modify(|reg| {
|
|
reg.set_txdmaen(true);
|
|
});
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_spe(true);
|
|
});
|
|
T::regs().cr1().modify(|w| {
|
|
w.set_cstart(true);
|
|
});
|
|
}
|
|
|
|
join(tx_f, rx_f).await;
|
|
|
|
finish_dma(T::regs());
|
|
|
|
Ok(())
|
|
}
|
|
}
|