31 lines
680 B
Rust
31 lines
680 B
Rust
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use crate::uart::Uart;
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const UART_RATE: u32 = 115_200;
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static mut UART: Option<Uart> = None;
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// TODO: locking for SMP
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#[doc(hidden)]
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pub fn get_uart() -> &'static mut Uart {
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unsafe {
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match &mut UART {
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None => {
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let mut uart = Uart::serial(UART_RATE);
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UART = Some(uart);
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UART.as_mut().unwrap()
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}
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Some(uart) => uart,
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}
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}
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}
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#[macro_export]
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macro_rules! println {
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($($arg:tt)*) => ({
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use core::fmt::Write;
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let uart = crate::stdio::get_uart();
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write!(uart, $($arg)*);
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write!(uart, "\r\n");
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while !uart.tx_fifo_empty() {}
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})
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}
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