db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
89 lines
2.5 KiB
Rust
89 lines
2.5 KiB
Rust
//! embassy serial
|
|
//!
|
|
//! This is an example of running the embassy executor and asynchronously
|
|
//! writing to and reading from uart
|
|
|
|
#![no_std]
|
|
#![no_main]
|
|
#![feature(type_alias_impl_trait)]
|
|
|
|
use esp32_hal::{
|
|
clock::ClockControl,
|
|
embassy::{self, executor::Executor},
|
|
interrupt,
|
|
peripherals::{Interrupt, Peripherals, UART0},
|
|
prelude::*,
|
|
timer::TimerGroup,
|
|
Uart,
|
|
};
|
|
use esp_backtrace as _;
|
|
use esp_hal_common::uart::{config::AtCmdConfig, UartRx, UartTx};
|
|
use heapless::Vec;
|
|
use static_cell::make_static;
|
|
|
|
// rx_fifo_full_threshold
|
|
const READ_BUF_SIZE: usize = 64;
|
|
// EOT (CTRL-D)
|
|
const AT_CMD: u8 = 0x04;
|
|
|
|
#[embassy_executor::task]
|
|
async fn writer(mut tx: UartTx<'static, UART0>) {
|
|
esp_println::println!("writing...");
|
|
embedded_io_async::Write::write(
|
|
&mut tx,
|
|
b"Hello async serial. Enter something ended with EOT (CTRL-D).\r\n",
|
|
)
|
|
.await
|
|
.unwrap();
|
|
embedded_io_async::Write::flush(&mut tx).await.unwrap();
|
|
}
|
|
|
|
#[embassy_executor::task]
|
|
async fn reader(mut rx: UartRx<'static, UART0>) {
|
|
esp_println::println!("reading...");
|
|
// max message size to receive
|
|
// leave some extra space for AT-CMD characters
|
|
const MAX_BUFFER_SIZE: usize = 10 * READ_BUF_SIZE + 16;
|
|
|
|
let mut rbuf: Vec<u8, MAX_BUFFER_SIZE> = Vec::new();
|
|
let mut offset = 0;
|
|
while let Ok(len) = embedded_io_async::Read::read(&mut rx, &mut rbuf[offset..]).await {
|
|
offset += len;
|
|
if offset == 0 {
|
|
rbuf.truncate(0);
|
|
break;
|
|
}
|
|
// if set_at_cmd is used than stop reading
|
|
if len < READ_BUF_SIZE {
|
|
rbuf.truncate(offset);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#[entry]
|
|
fn main() -> ! {
|
|
esp_println::println!("Init!");
|
|
let peripherals = Peripherals::take();
|
|
let system = peripherals.SYSTEM.split();
|
|
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
|
|
|
|
let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
|
|
embassy::init(&clocks, timer_group0.timer0);
|
|
|
|
let mut uart0 = Uart::new(peripherals.UART0, &clocks);
|
|
uart0.set_at_cmd(AtCmdConfig::new(None, None, None, AT_CMD, None));
|
|
uart0
|
|
.set_rx_fifo_full_threshold(READ_BUF_SIZE as u16)
|
|
.unwrap();
|
|
let (tx, rx) = uart0.split();
|
|
|
|
interrupt::enable(Interrupt::UART0, interrupt::Priority::Priority1).unwrap();
|
|
|
|
let executor = make_static!(Executor::new());
|
|
executor.run(|spawner| {
|
|
spawner.spawn(reader(rx)).ok();
|
|
spawner.spawn(writer(tx)).ok();
|
|
});
|
|
}
|