esp-hal/esp32c3-hal/examples/hello_world.rs
Scott Mabin 248fb356f8
PeripheralRef init: uart (#272)
* Add the peripheral module plus some helper macros in preparation

* peripheral macro

* Add peripheral generation macro

* Fixes after rebase

* Update the signature of Peripherals::take

* syncronise hello world example

* fmt the entire repo

Co-authored-by: Jesse Braham <jesse@beta7.io>
2022-12-12 14:45:33 +00:00

48 lines
1.1 KiB
Rust

//! This shows how to write text to uart0.
//! You can see the output with `espflash` if you provide the `--monitor` option
#![no_std]
#![no_main]
use core::fmt::Write;
use esp32c3_hal::{
clock::ClockControl,
peripherals::Peripherals,
prelude::*,
timer::TimerGroup,
Rtc,
Uart,
};
use esp_backtrace as _;
use nb::block;
use riscv_rt::entry;
#[entry]
fn main() -> ! {
let peripherals = Peripherals::take();
let system = peripherals.SYSTEM.split();
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
let mut rtc = Rtc::new(peripherals.RTC_CNTL);
let mut uart0 = Uart::new(peripherals.UART0);
let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
let mut timer0 = timer_group0.timer0;
let mut wdt0 = timer_group0.wdt;
let timer_group1 = TimerGroup::new(peripherals.TIMG1, &clocks);
let mut wdt1 = timer_group1.wdt;
// Disable watchdog timers
rtc.swd.disable();
rtc.rwdt.disable();
wdt0.disable();
wdt1.disable();
timer0.start(1u64.secs());
loop {
writeln!(uart0, "Hello world!").unwrap();
block!(timer0.wait()).unwrap();
}
}