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use crate::sync::NullLock;
use crate::sync::interface::Mutex;
use uart_16550::SerialPort;
pub struct Serial {
buffer: Option<SerialPort>,
}
impl Serial {
pub const fn new() -> Self {
Serial { buffer: None }
}
}
impl NullLock<Serial> {
pub fn init(&self) {
self.lock(|serial| {
let mut serial_port = unsafe { SerialPort::new(0x3F8) };
serial_port.init();
serial.buffer = Some(serial_port);
});
}
}
#[doc(hidden)]
pub fn _print(args: ::core::fmt::Arguments) {
use core::fmt::Write;
SERIAL1.lock(|serial| {
if let Some(buffer) = &mut serial.buffer {
buffer.write_fmt(args).expect("printing to serial failed!");
}
})
}
/// Prints to the host through the serial interface.
#[macro_export]
macro_rules! serial_print {
($($arg:tt)*) => {
$crate::serial::_print(format_args!($($arg)*));
};
}
/// Prints to the host through the serial interface, appending a newline.
#[macro_export]
macro_rules! serial_println {
() => ($crate::serial_print!("\n"));
($fmt:expr) => ($crate::serial_print!(concat!($fmt, "\n")));
($fmt:expr, $($arg:tt)*) => ($crate::serial_print!(
concat!($fmt, "\n"), $($arg)*));
}
pub static SERIAL1: NullLock<Serial> = NullLock::new(Serial::new());
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