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// required-features: two-uarts
#![no_std]
#![no_main]
#[path = "../common.rs"]
mod common;
use core::mem;
use core::ptr::NonNull;
use defmt::{assert_eq, *};
use embassy_executor::Spawner;
use embassy_nrf::buffered_uarte::{self, BufferedUarteRx};
use embassy_nrf::gpio::{Level, Output, OutputDrive};
use embassy_nrf::ppi::{Event, Ppi, Task};
use embassy_nrf::uarte::UarteTx;
use embassy_nrf::{pac, peripherals, uarte};
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let mut p = embassy_nrf::init(Default::default());
let mut config = uarte::Config::default();
config.parity = uarte::Parity::EXCLUDED;
config.baudrate = uarte::Baudrate::BAUD1M;
let mut rx_buffer = [0u8; 1024];
mem::forget(Output::new(
peri!(p, PIN_A).reborrow(),
Level::High,
OutputDrive::Standard,
));
let mut u = BufferedUarteRx::new(
peri!(p, UART0),
p.TIMER0,
p.PPI_CH0,
p.PPI_CH1,
p.PPI_GROUP0,
irqs!(UART0_BUFFERED),
peri!(p, PIN_B),
config.clone(),
&mut rx_buffer,
);
info!("uarte initialized!");
// uarte needs some quiet time to start rxing properly.
Timer::after_millis(10).await;
// Tx spam in a loop.
const NSPAM: usize = 17;
static mut TX_BUF: [u8; NSPAM] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
let _spam = UarteTx::new(peri!(p, UART1), irqs!(UART1), peri!(p, PIN_A), config.clone());
let spam_peri = pac::UARTE1;
let event = unsafe { Event::new_unchecked(NonNull::new_unchecked(spam_peri.events_endtx().as_ptr())) };
let task = unsafe { Task::new_unchecked(NonNull::new_unchecked(spam_peri.tasks_starttx().as_ptr())) };
let mut spam_ppi = Ppi::new_one_to_one(p.PPI_CH2, event, task);
spam_ppi.enable();
let p = (&raw mut TX_BUF) as *mut u8;
spam_peri.txd().ptr().write_value(p as u32);
spam_peri.txd().maxcnt().write(|w| w.set_maxcnt(NSPAM as _));
spam_peri.tasks_starttx().write_value(1);
let mut i = 0;
let mut total = 0;
while total < 256 * 1024 {
let buf = unwrap!(u.fill_buf().await);
//info!("rx {}", buf);
for &b in buf {
assert_eq!(b, unsafe { TX_BUF[i] });
i = i + 1;
if i == NSPAM {
i = 0;
}
}
// Read bytes have to be explicitly consumed, otherwise fill_buf() will return them again
let n = buf.len();
u.consume(n);
total += n;
}
info!("Test OK");
cortex_m::asm::bkpt();
}
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