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Add IRQ-driven buffered USART implementation for STM32 v2 usart (#356)

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* Add IRQ-driven buffered USART implementation for STM32 v2 usart

* Implementation based on nRF UARTE, but simplified to not use DMA to
  avoid complex interaction between DMA and USART.
* Implementation of AsyncBufRead and AsyncWrite traits
* Some unit tests to ring buffer
* Update polyfill version
* Update sub module to get usart IRQ fix
This commit is contained in:
Ulf Lilleengen
2021-08-16 17:16:49 +02:00
committed by GitHub
parent c310f18aaf
commit cbff0398bb
7 changed files with 325 additions and 16 deletions
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14
embassy-stm32/src/usart/mod.rs
View File

@ -8,6 +8,7 @@ pub use _version::*;
use crate::gpio::Pin;
use crate::rcc::RccPeripheral;
use embassy::interrupt::Interrupt;
#[derive(Clone, Copy, PartialEq, Eq, Debug)]
pub enum DataBits {
@ -100,7 +101,9 @@ pub(crate) mod sealed {
}
}
pub trait Instance: sealed::Instance + RccPeripheral {}
pub trait Instance: sealed::Instance + RccPeripheral {
type Interrupt: Interrupt;
}
pub trait RxPin<T: Instance>: sealed::RxPin<T> {}
pub trait TxPin<T: Instance>: sealed::TxPin<T> {}
pub trait CtsPin<T: Instance>: sealed::CtsPin<T> {}
@ -109,15 +112,18 @@ pub trait CkPin<T: Instance>: sealed::CkPin<T> {}
pub trait RxDma<T: Instance>: sealed::RxDma<T> + dma::Channel {}
pub trait TxDma<T: Instance>: sealed::TxDma<T> + dma::Channel {}
crate::pac::peripherals!(
(usart, $inst:ident) => {
crate::pac::interrupts!(
($inst:ident, usart, $block:ident, $signal_name:ident, $irq:ident) => {
impl sealed::Instance for peripherals::$inst {
fn regs(&self) -> crate::pac::usart::Usart {
crate::pac::$inst
}
}
impl Instance for peripherals::$inst {}
impl Instance for peripherals::$inst {
type Interrupt = crate::interrupt::$irq;
}
};
);