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
|
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use core::fmt::Write;
use core::str::from_utf8;
use cortex_m_rt::entry;
use defmt::*;
use embassy_executor::executor::Executor;
use embassy_stm32::dma::NoDma;
use embassy_stm32::peripherals::SPI3;
use embassy_stm32::time::mhz;
use embassy_stm32::{spi, Config};
use embassy_util::Forever;
use heapless::String;
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::task]
async fn main_task(mut spi: spi::Spi<'static, SPI3, NoDma, NoDma>) {
for n in 0u32.. {
let mut write: String<128> = String::new();
core::write!(&mut write, "Hello DMA World {}!\r\n", n).unwrap();
unsafe {
let result = spi.blocking_transfer_in_place(write.as_bytes_mut());
if let Err(_) = result {
defmt::panic!("crap");
}
}
info!("read via spi: {}", from_utf8(write.as_bytes()).unwrap());
}
}
static EXECUTOR: Forever<Executor> = Forever::new();
#[entry]
fn main() -> ! {
info!("Hello World!");
let mut config = Config::default();
config.rcc.sys_ck = Some(mhz(400));
config.rcc.hclk = Some(mhz(200));
config.rcc.pll1.q_ck = Some(mhz(100));
let p = embassy_stm32::init(config);
let spi = spi::Spi::new(
p.SPI3,
p.PB3,
p.PB5,
p.PB4,
NoDma,
NoDma,
mhz(1),
spi::Config::default(),
);
let executor = EXECUTOR.put(Executor::new());
executor.run(|spawner| {
unwrap!(spawner.spawn(main_task(spi)));
})
}
|
