52 lines
1.8 KiB
Rust
52 lines
1.8 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.
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//!
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//! Depending on the chip, you will need to ensure that you are connected to
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//! the UART USB port, and not the USB-SERIAL-JTAG port. If you want to test
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//! printing over USB-SERIAL-JTAG, try the usb_serial_jtag example instead.
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//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
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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 esp_backtrace as _;
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use esp_hal::{delay::Delay, gpio::Io, prelude::*, uart::Uart};
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#[entry]
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fn main() -> ! {
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let peripherals = esp_hal::init(esp_hal::Config::default());
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let delay = Delay::new();
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let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
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// Default pins for Uart/Serial communication
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cfg_if::cfg_if! {
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if #[cfg(feature = "esp32")] {
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let (mut tx_pin, mut rx_pin) = (io.pins.gpio1, io.pins.gpio3);
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} else if #[cfg(feature = "esp32c2")] {
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let (mut tx_pin, mut rx_pin) = (io.pins.gpio20, io.pins.gpio19);
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} else if #[cfg(feature = "esp32c3")] {
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let (mut tx_pin, mut rx_pin) = (io.pins.gpio21, io.pins.gpio20);
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} else if #[cfg(feature = "esp32c6")] {
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let (mut tx_pin, mut rx_pin) = (io.pins.gpio16, io.pins.gpio17);
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} else if #[cfg(feature = "esp32h2")] {
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let (mut tx_pin, mut rx_pin) = (io.pins.gpio24, io.pins.gpio23);
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} else if #[cfg(any(feature = "esp32s2", feature = "esp32s3"))] {
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let (mut tx_pin, mut rx_pin) = (io.pins.gpio43, io.pins.gpio44);
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}
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}
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let mut uart0 = Uart::new(peripherals.UART0, &mut rx_pin, &mut tx_pin).unwrap();
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loop {
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writeln!(uart0, "Hello world!").unwrap();
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delay.delay(1.secs());
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}
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}
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