87 lines
2.7 KiB
Rust
87 lines
2.7 KiB
Rust
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use core::mem;
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use core::ptr::NonNull;
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use defmt::{assert_eq, *};
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use embassy_executor::Spawner;
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use embassy_nrf::buffered_uarte::BufferedUarte;
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use embassy_nrf::gpio::{Level, Output, OutputDrive};
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use embassy_nrf::ppi::{Event, Ppi, Task};
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use embassy_nrf::uarte::Uarte;
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use embassy_nrf::{interrupt, pac, uarte};
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use embassy_time::{Duration, Timer};
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let mut p = embassy_nrf::init(Default::default());
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let mut config = uarte::Config::default();
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config.parity = uarte::Parity::EXCLUDED;
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config.baudrate = uarte::Baudrate::BAUD1M;
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let mut tx_buffer = [0u8; 1024];
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let mut rx_buffer = [0u8; 1024];
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mem::forget(Output::new(&mut p.P1_02, Level::High, OutputDrive::Standard));
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let mut u = BufferedUarte::new(
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p.UARTE0,
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p.TIMER0,
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p.PPI_CH0,
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p.PPI_CH1,
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p.PPI_GROUP0,
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interrupt::take!(UARTE0_UART0),
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p.P1_03,
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p.P1_04,
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config.clone(),
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&mut rx_buffer,
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&mut tx_buffer,
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);
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info!("uarte initialized!");
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// uarte needs some quiet time to start rxing properly.
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Timer::after(Duration::from_millis(10)).await;
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// Tx spam in a loop.
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const NSPAM: usize = 17;
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static mut TX_BUF: [u8; NSPAM] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
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let _spam = Uarte::new(p.UARTE1, interrupt::take!(UARTE1), p.P1_01, p.P1_02, config.clone());
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let spam_peri: pac::UARTE1 = unsafe { mem::transmute(()) };
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let event = unsafe { Event::new_unchecked(NonNull::new_unchecked(&spam_peri.events_endtx as *const _ as _)) };
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let task = unsafe { Task::new_unchecked(NonNull::new_unchecked(&spam_peri.tasks_starttx as *const _ as _)) };
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let mut spam_ppi = Ppi::new_one_to_one(p.PPI_CH2, event, task);
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spam_ppi.enable();
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let p = unsafe { TX_BUF.as_mut_ptr() };
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spam_peri.txd.ptr.write(|w| unsafe { w.ptr().bits(p as u32) });
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spam_peri.txd.maxcnt.write(|w| unsafe { w.maxcnt().bits(NSPAM as _) });
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spam_peri.tasks_starttx.write(|w| unsafe { w.bits(1) });
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let mut i = 0;
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let mut total = 0;
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while total < 256 * 1024 {
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let buf = unwrap!(u.fill_buf().await);
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//info!("rx {}", buf);
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for &b in buf {
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assert_eq!(b, unsafe { TX_BUF[i] });
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i = i + 1;
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if i == NSPAM {
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i = 0;
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}
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}
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// Read bytes have to be explicitly consumed, otherwise fill_buf() will return them again
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let n = buf.len();
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u.consume(n);
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total += n;
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}
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info!("Test OK");
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cortex_m::asm::bkpt();
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}
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