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use core::{
cell::RefCell,
fmt::{write, Arguments},
};
use cortex_m::interrupt::{self, Mutex};
#[macro_export]
macro_rules! log {
($($args:tt)+) => {
$crate::log::log_args(core::format_args!($($args)+))
}
}
#[macro_export]
macro_rules! logln {
() => ({ kprint!("\r\n") });
($fmt: literal $(, $($arg: tt)+)?) => {
log!(concat!($fmt, "\n") $(, $($arg)+)?)
}
}
static TX: Mutex<RefCell<Option<arch::Writer>>> = Mutex::new(RefCell::new(None));
pub fn init(tx: arch::Writer) {
interrupt::free(|cs| {
TX.borrow(cs).replace(Some(tx));
});
}
pub fn log_args(args: Arguments) {
interrupt::free(|cs| {
TX.borrow(cs)
.borrow_mut()
.as_mut()
.map(|tx| write(tx, args));
});
}
/*
* Because the logger needs to have a size in order to be allocated
* statically, we need to pull in architecture-specific details about
* the implementation.
*
* By putting everything in an `arch` module, we can more easily swap
* things out at compile time with feature flags, or a similar
* mechanism.
*/
mod arch {
use stm32f1xx_hal::{pac::USART1, serial::Tx};
pub type Writer = Tx<USART1>;
}
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