hifive_inventor/
io.rs

1// Licensed under the Apache License, Version 2.0 or the MIT License.
2// SPDX-License-Identifier: Apache-2.0 OR MIT
3// Copyright Tock Contributors 2022.
4
5use core::fmt::Write;
6use core::panic::PanicInfo;
7use core::str;
8use kernel::debug;
9use kernel::debug::IoWrite;
10use kernel::hil::led;
11
12struct Writer {}
13
14static mut WRITER: Writer = Writer {};
15
16impl Write for Writer {
17    fn write_str(&mut self, s: &str) -> ::core::fmt::Result {
18        self.write(s.as_bytes());
19        Ok(())
20    }
21}
22
23impl IoWrite for Writer {
24    fn write(&mut self, buf: &[u8]) -> usize {
25        let uart = sifive::uart::Uart::new(e310_g003::uart::UART0_BASE, 16_000_000);
26        uart.transmit_sync(buf);
27        buf.len()
28    }
29}
30
31/// Panic handler.
32#[cfg(not(test))]
33#[panic_handler]
34pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! {
35    use core::ptr::addr_of_mut;
36
37    let led = sifive::gpio::GpioPin::new(
38        e310_g003::gpio::GPIO0_BASE,
39        sifive::gpio::pins::pin22,
40        sifive::gpio::pins::pin22::SET,
41        sifive::gpio::pins::pin22::CLEAR,
42    );
43    let led = &mut led::LedLow::new(&led);
44    let writer = &mut *addr_of_mut!(WRITER);
45
46    debug::panic(
47        &mut [led],
48        writer,
49        pi,
50        &rv32i::support::nop,
51        crate::PANIC_RESOURCES.get(),
52    )
53}
hifive_inventor/io.rs

hifive_inventor/
io.rs
