You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: uno-println.rs
    path of file: ./repos/avr-hal/examples/arduino-uno/src/bin
    
    the code of the file until where you have to start completion: /*!
 * This is an example of how one can define a println!() macro which can be called anywhere to
 * write data to the console.
 *
 * Keep in mind that this will enter a critical section while printing so no interrupts can be
 * served in the meantime.
 
    
fn main() -> ! {
    let dp = arduino_hal::Peripherals::take().unwrap();
    let pins = arduino_hal::pins!(dp);
    let serial = arduino_hal::default_serial!(dp, pins, 57600);
    put_console(serial);

    println!("Hello from main!");
    subfunction();
    demo_print_without_ln();

    loop {}
}