1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
teleprobe_meta::target!(b"nrf52840-dk");
use core::mem;
use core::ptr::NonNull;
use defmt::{assert_eq, *};
use embassy_executor::Spawner;
use embassy_nrf::buffered_uarte::{self, BufferedUarte};
use embassy_nrf::gpio::{Level, Output, OutputDrive};
use embassy_nrf::ppi::{Event, Ppi, Task};
use embassy_nrf::uarte::Uarte;
use embassy_nrf::{bind_interrupts, pac, peripherals, uarte};
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs {
UARTE0_UART0 => buffered_uarte::InterruptHandler<peripherals::UARTE0>;
UARTE1 => uarte::InterruptHandler<peripherals::UARTE1>;
});
#[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 tx_buffer = [0u8; 1024];
let mut rx_buffer = [0u8; 1024];
mem::forget(Output::new(&mut p.P1_02, Level::High, OutputDrive::Standard));
let mut u = BufferedUarte::new(
p.UARTE0,
p.TIMER0,
p.PPI_CH0,
p.PPI_CH1,
p.PPI_GROUP0,
Irqs,
p.P1_03,
p.P1_04,
config.clone(),
&mut rx_buffer,
&mut tx_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 = Uarte::new(p.UARTE1, Irqs, p.P1_01, p.P1_02, config.clone());
let spam_peri: pac::UARTE1 = unsafe { mem::transmute(()) };
let event = unsafe { Event::new_unchecked(NonNull::new_unchecked(&spam_peri.events_endtx as *const _ as _)) };
let task = unsafe { Task::new_unchecked(NonNull::new_unchecked(&spam_peri.tasks_starttx as *const _ as _)) };
let mut spam_ppi = Ppi::new_one_to_one(p.PPI_CH2, event, task);
spam_ppi.enable();
let p = unsafe { TX_BUF.as_mut_ptr() };
spam_peri.txd.ptr.write(|w| unsafe { w.ptr().bits(p as u32) });
spam_peri.txd.maxcnt.write(|w| unsafe { w.maxcnt().bits(NSPAM as _) });
spam_peri.tasks_starttx.write(|w| unsafe { w.bits(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();
}
|
