#![no_std]
#![no_main]
use esp32c3_hal::{
clock::ClockControl,
peripherals::Peripherals,
prelude::*,
timer::TimerGroup,
uart::{
config::{Config, DataBits, Parity, StopBits},
TxRxPins,
},
Rtc,
Uart,
IO,
};
use esp_backtrace as _;
use esp_println::println;
use nb::block;
#[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 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;
rtc.swd.disable();
rtc.rwdt.disable();
wdt0.disable();
wdt1.disable();
let config = Config {
baudrate: 115200,
data_bits: DataBits::DataBits8,
parity: Parity::ParityNone,
stop_bits: StopBits::STOP1,
};
let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
let pins = TxRxPins::new_tx_rx(
io.pins.gpio1.into_push_pull_output(),
io.pins.gpio2.into_floating_input(),
);
let mut serial1 = Uart::new_with_config(peripherals.UART1, Some(config), Some(pins), &clocks);
timer0.start(250u64.millis());
println!("Start");
loop {
serial1.write(0x42).ok();
let read = block!(serial1.read());
match read {
Ok(read) => println!("Read {:02x}", read),
Err(err) => println!("Error {:?}", err),
}
block!(timer0.wait()).unwrap();
}
}