rp/uart: report errors from dma receive
This commit is contained in:
pennae
parent
1d5adb8974
commit
b58b9ff390
4 changed files with 375 additions and 25 deletions
tests/rp/src/bin
|
|
@ -4,28 +4,246 @@
|
|||
|
||||
use defmt::{assert_eq, *};
|
||||
use embassy_executor::Spawner;
|
||||
use embassy_rp::uart::{Config, Uart};
|
||||
use embassy_rp::gpio::{Level, Output};
|
||||
use embassy_rp::interrupt;
|
||||
use embassy_rp::uart::{Async, Config, Error, Instance, Parity, Uart, UartRx};
|
||||
use embassy_time::{Duration, Timer};
|
||||
use {defmt_rtt as _, panic_probe as _};
|
||||
|
||||
async fn read<const N: usize>(uart: &mut Uart<'_, impl Instance, Async>) -> Result<[u8; N], Error> {
|
||||
let mut buf = [255; N];
|
||||
uart.read(&mut buf).await?;
|
||||
Ok(buf)
|
||||
}
|
||||
|
||||
async fn read1<const N: usize>(uart: &mut UartRx<'_, impl Instance, Async>) -> Result<[u8; N], Error> {
|
||||
let mut buf = [255; N];
|
||||
uart.read(&mut buf).await?;
|
||||
Ok(buf)
|
||||
}
|
||||
|
||||
async fn send(pin: &mut Output<'_, impl embassy_rp::gpio::Pin>, v: u8, parity: Option<bool>) {
|
||||
pin.set_low();
|
||||
Timer::after(Duration::from_millis(1)).await;
|
||||
for i in 0..8 {
|
||||
if v & (1 << i) == 0 {
|
||||
pin.set_low();
|
||||
} else {
|
||||
pin.set_high();
|
||||
}
|
||||
Timer::after(Duration::from_millis(1)).await;
|
||||
}
|
||||
if let Some(b) = parity {
|
||||
if b {
|
||||
pin.set_high();
|
||||
} else {
|
||||
pin.set_low();
|
||||
}
|
||||
Timer::after(Duration::from_millis(1)).await;
|
||||
}
|
||||
pin.set_high();
|
||||
Timer::after(Duration::from_millis(1)).await;
|
||||
}
|
||||
|
||||
#[embassy_executor::main]
|
||||
async fn main(_spawner: Spawner) {
|
||||
let p = embassy_rp::init(Default::default());
|
||||
let mut p = embassy_rp::init(Default::default());
|
||||
info!("Hello World!");
|
||||
|
||||
let (tx, rx, uart) = (p.PIN_0, p.PIN_1, p.UART0);
|
||||
let (mut tx, mut rx, mut uart) = (p.PIN_0, p.PIN_1, p.UART0);
|
||||
let mut irq = interrupt::take!(UART0_IRQ);
|
||||
|
||||
let config = Config::default();
|
||||
let mut uart = Uart::new(uart, tx, rx, p.DMA_CH0, p.DMA_CH1, config);
|
||||
// TODO
|
||||
// nuclear error reporting. just abort the entire transfer and invalidate the
|
||||
// dma buffer, buffered buffer, fifo etc.
|
||||
|
||||
// We can't send too many bytes, they have to fit in the FIFO.
|
||||
// This is because we aren't sending+receiving at the same time.
|
||||
{
|
||||
let config = Config::default();
|
||||
let mut uart = Uart::new(
|
||||
&mut uart,
|
||||
&mut tx,
|
||||
&mut rx,
|
||||
&mut irq,
|
||||
&mut p.DMA_CH0,
|
||||
&mut p.DMA_CH1,
|
||||
config,
|
||||
);
|
||||
|
||||
let data = [0xC0, 0xDE];
|
||||
uart.write(&data).await.unwrap();
|
||||
let data = [0xC0, 0xDE];
|
||||
uart.write(&data).await.unwrap();
|
||||
|
||||
let mut buf = [0; 2];
|
||||
uart.read(&mut buf).await.unwrap();
|
||||
assert_eq!(buf, data);
|
||||
let mut buf = [0; 2];
|
||||
uart.read(&mut buf).await.unwrap();
|
||||
assert_eq!(buf, data);
|
||||
}
|
||||
|
||||
info!("test overflow detection");
|
||||
{
|
||||
let config = Config::default();
|
||||
let mut uart = Uart::new(
|
||||
&mut uart,
|
||||
&mut tx,
|
||||
&mut rx,
|
||||
&mut irq,
|
||||
&mut p.DMA_CH0,
|
||||
&mut p.DMA_CH1,
|
||||
config,
|
||||
);
|
||||
|
||||
uart.blocking_write(&[42; 32]).unwrap();
|
||||
uart.blocking_write(&[1, 2, 3]).unwrap();
|
||||
uart.blocking_flush().unwrap();
|
||||
|
||||
// can receive regular fifo contents
|
||||
assert_eq!(read(&mut uart).await, Ok([42; 16]));
|
||||
assert_eq!(read(&mut uart).await, Ok([42; 16]));
|
||||
// receiving the rest fails with overrun
|
||||
assert_eq!(read::<16>(&mut uart).await, Err(Error::Overrun));
|
||||
// new data is accepted, latest overrunning byte first
|
||||
assert_eq!(read(&mut uart).await, Ok([3]));
|
||||
uart.blocking_write(&[8, 9]).unwrap();
|
||||
Timer::after(Duration::from_millis(1)).await;
|
||||
assert_eq!(read(&mut uart).await, Ok([8, 9]));
|
||||
}
|
||||
|
||||
info!("test break detection");
|
||||
{
|
||||
let config = Config::default();
|
||||
let (mut tx, mut rx) = Uart::new(
|
||||
&mut uart,
|
||||
&mut tx,
|
||||
&mut rx,
|
||||
&mut irq,
|
||||
&mut p.DMA_CH0,
|
||||
&mut p.DMA_CH1,
|
||||
config,
|
||||
)
|
||||
.split();
|
||||
|
||||
// break before read
|
||||
tx.send_break(20).await;
|
||||
tx.write(&[64]).await.unwrap();
|
||||
assert_eq!(read1::<1>(&mut rx).await.unwrap_err(), Error::Break);
|
||||
assert_eq!(read1(&mut rx).await.unwrap(), [64]);
|
||||
|
||||
// break during read
|
||||
{
|
||||
let r = read1::<2>(&mut rx);
|
||||
tx.write(&[2]).await.unwrap();
|
||||
tx.send_break(20).await;
|
||||
tx.write(&[3]).await.unwrap();
|
||||
assert_eq!(r.await.unwrap_err(), Error::Break);
|
||||
assert_eq!(read1(&mut rx).await.unwrap(), [3]);
|
||||
}
|
||||
|
||||
// break after read
|
||||
{
|
||||
let r = read1(&mut rx);
|
||||
tx.write(&[2]).await.unwrap();
|
||||
tx.send_break(20).await;
|
||||
tx.write(&[3]).await.unwrap();
|
||||
assert_eq!(r.await.unwrap(), [2]);
|
||||
assert_eq!(read1::<1>(&mut rx).await.unwrap_err(), Error::Break);
|
||||
assert_eq!(read1(&mut rx).await.unwrap(), [3]);
|
||||
}
|
||||
}
|
||||
|
||||
// parity detection. here we bitbang to not require two uarts.
|
||||
info!("test parity error detection");
|
||||
{
|
||||
let mut pin = Output::new(&mut tx, Level::High);
|
||||
// choose a very slow baud rate to make tests reliable even with O0
|
||||
let mut config = Config::default();
|
||||
config.baudrate = 1000;
|
||||
config.parity = Parity::ParityEven;
|
||||
let mut uart = UartRx::new(&mut uart, &mut rx, &mut irq, &mut p.DMA_CH0, config);
|
||||
|
||||
async fn chr(pin: &mut Output<'_, impl embassy_rp::gpio::Pin>, v: u8, parity: u32) {
|
||||
send(pin, v, Some(parity != 0)).await;
|
||||
}
|
||||
|
||||
// first check that we can send correctly
|
||||
chr(&mut pin, 32, 1).await;
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [32]);
|
||||
|
||||
// parity error before read
|
||||
chr(&mut pin, 32, 0).await;
|
||||
chr(&mut pin, 31, 1).await;
|
||||
assert_eq!(read1::<1>(&mut uart).await.unwrap_err(), Error::Parity);
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [31]);
|
||||
|
||||
// parity error during read
|
||||
{
|
||||
let r = read1::<2>(&mut uart);
|
||||
chr(&mut pin, 2, 1).await;
|
||||
chr(&mut pin, 32, 0).await;
|
||||
chr(&mut pin, 3, 0).await;
|
||||
assert_eq!(r.await.unwrap_err(), Error::Parity);
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [3]);
|
||||
}
|
||||
|
||||
// parity error after read
|
||||
{
|
||||
let r = read1(&mut uart);
|
||||
chr(&mut pin, 2, 1).await;
|
||||
chr(&mut pin, 32, 0).await;
|
||||
chr(&mut pin, 3, 0).await;
|
||||
assert_eq!(r.await.unwrap(), [2]);
|
||||
assert_eq!(read1::<1>(&mut uart).await.unwrap_err(), Error::Parity);
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [3]);
|
||||
}
|
||||
}
|
||||
|
||||
// framing error detection. here we bitbang because there's no other way.
|
||||
info!("test framing error detection");
|
||||
{
|
||||
let mut pin = Output::new(&mut tx, Level::High);
|
||||
// choose a very slow baud rate to make tests reliable even with O0
|
||||
let mut config = Config::default();
|
||||
config.baudrate = 1000;
|
||||
let mut uart = UartRx::new(&mut uart, &mut rx, &mut irq, &mut p.DMA_CH0, config);
|
||||
|
||||
async fn chr(pin: &mut Output<'_, impl embassy_rp::gpio::Pin>, v: u8, good: bool) {
|
||||
if good {
|
||||
send(pin, v, None).await;
|
||||
} else {
|
||||
send(pin, v, Some(false)).await;
|
||||
}
|
||||
}
|
||||
|
||||
// first check that we can send correctly
|
||||
chr(&mut pin, 32, true).await;
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [32]);
|
||||
|
||||
// parity error before read
|
||||
chr(&mut pin, 32, false).await;
|
||||
chr(&mut pin, 31, true).await;
|
||||
assert_eq!(read1::<1>(&mut uart).await.unwrap_err(), Error::Framing);
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [31]);
|
||||
|
||||
// parity error during read
|
||||
{
|
||||
let r = read1::<2>(&mut uart);
|
||||
chr(&mut pin, 2, true).await;
|
||||
chr(&mut pin, 32, false).await;
|
||||
chr(&mut pin, 3, true).await;
|
||||
assert_eq!(r.await.unwrap_err(), Error::Framing);
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [3]);
|
||||
}
|
||||
|
||||
// parity error after read
|
||||
{
|
||||
let r = read1(&mut uart);
|
||||
chr(&mut pin, 2, true).await;
|
||||
chr(&mut pin, 32, false).await;
|
||||
chr(&mut pin, 3, true).await;
|
||||
assert_eq!(r.await.unwrap(), [2]);
|
||||
assert_eq!(read1::<1>(&mut uart).await.unwrap_err(), Error::Framing);
|
||||
assert_eq!(read1(&mut uart).await.unwrap(), [3]);
|
||||
}
|
||||
}
|
||||
|
||||
info!("Test OK");
|
||||
cortex_m::asm::bkpt();
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue