45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
//! This shows how to write text to UART0.
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//!
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//! You can see the output with `espflash` if you provide the `--monitor`
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//! option. Depending on the chip, you will need to ensure that you are
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//! connected to the UART USB port, and not the USB-SERIAL-JTAG port.
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//! If you want to test printing over USB-SERIAL-JTAG, try the usb_serial_jtag
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//! example instead.
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//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
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//% FEATURES: embedded-hal-02
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#![no_std]
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#![no_main]
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use core::fmt::Write;
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use embedded_hal_02::timer::CountDown;
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use esp_backtrace as _;
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use esp_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::Uart,
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};
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use nb::block;
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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 timg0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut timer0 = timg0.timer0;
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timer0.start(1u64.secs());
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let mut uart0 = Uart::new(peripherals.UART0, &clocks);
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loop {
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writeln!(uart0, "Hello world!").unwrap();
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block!(timer0.wait()).unwrap();
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}
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}
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