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https://github.com/esp-rs/esp-hal.git
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248fb356f8
* 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>
76 lines
2.0 KiB
Rust
76 lines
2.0 KiB
Rust
//! This shows how to configure UART
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//! You can short the TX and RX pin and see it reads what was written.
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//! Additionally you can connect a logic analzyer to TX and see how the changes
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//! of the configuration change the output signal.
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#![no_std]
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#![no_main]
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use esp32c3_hal::{
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clock::ClockControl,
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peripherals::Peripherals,
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prelude::*,
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timer::TimerGroup,
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uart::{
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config::{Config, DataBits, Parity, StopBits},
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TxRxPins,
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},
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Rtc,
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Uart,
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IO,
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};
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use esp_backtrace as _;
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use esp_println::println;
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use nb::block;
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use riscv_rt::entry;
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take();
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let system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let mut rtc = Rtc::new(peripherals.RTC_CNTL);
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let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut timer0 = timer_group0.timer0;
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let mut wdt0 = timer_group0.wdt;
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let timer_group1 = TimerGroup::new(peripherals.TIMG1, &clocks);
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let mut wdt1 = timer_group1.wdt;
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// Disable watchdog timers
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rtc.swd.disable();
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rtc.rwdt.disable();
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wdt0.disable();
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wdt1.disable();
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let config = Config {
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baudrate: 115200,
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data_bits: DataBits::DataBits8,
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parity: Parity::ParityNone,
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stop_bits: StopBits::STOP1,
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};
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let pins = TxRxPins::new_tx_rx(
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io.pins.gpio1.into_push_pull_output(),
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io.pins.gpio2.into_floating_input(),
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);
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let mut serial1 = Uart::new_with_config(peripherals.UART1, Some(config), Some(pins), &clocks);
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timer0.start(250u64.millis());
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println!("Start");
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loop {
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serial1.write(0x42).ok();
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let read = block!(serial1.read());
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match read {
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Ok(read) => println!("Read {:02x}", read),
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Err(err) => println!("Error {:?}", err),
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}
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block!(timer0.wait()).unwrap();
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}
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}
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