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Ensure SPI DMA write is completed

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Fix a bug where DMA writes were not fully completed and only a single
byte out of two were written.
This commit is contained in:
Ulf Lilleengen 2021-11-24 14:59:18 +01:00
parent 8fea6c94f6
commit cd9a1d547c
1 changed files with 11 additions and 2 deletions
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13
embassy-stm32/src/spi/v2.rs
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@ -17,7 +17,7 @@ use embassy::util::Unborrow;
use embassy_hal_common::unborrow; use embassy_hal_common::unborrow;
use embassy_traits::spi as traits; use embassy_traits::spi as traits;
pub use embedded_hal::spi::{Mode, Phase, Polarity, MODE_0, MODE_1, MODE_2, MODE_3}; pub use embedded_hal::spi::{Mode, Phase, Polarity, MODE_0, MODE_1, MODE_2, MODE_3};
use futures::future::join3; use futures::future::{join, join3};
impl WordSize { impl WordSize {
fn ds(&self) -> spi::vals::Ds { fn ds(&self) -> spi::vals::Ds {
@ -186,7 +186,16 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}); });
} }
f.await; join(f, Self::wait_for_idle()).await;
unsafe {
T::regs().cr2().modify(|reg| {
reg.set_txdmaen(false);
});
T::regs().cr1().modify(|w| {
w.set_spe(false);
});
}
Ok(()) Ok(())
} }