esp32_c3_board/
io.rs

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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::ptr::addr_of;
8use core::str;
9use kernel::debug;
10use kernel::debug::IoWrite;
11
12use crate::CHIP;
13use crate::PROCESSES;
14use crate::PROCESS_PRINTER;
15
16struct Writer {}
17
18static mut WRITER: Writer = Writer {};
19
20impl Write for Writer {
21    fn write_str(&mut self, s: &str) -> ::core::fmt::Result {
22        self.write(s.as_bytes());
23        Ok(())
24    }
25}
26
27impl IoWrite for Writer {
28    fn write(&mut self, buf: &[u8]) -> usize {
29        let uart = esp32::uart::Uart::new(esp32::uart::UART0_BASE);
30        uart.disable_tx_interrupt();
31        uart.disable_rx_interrupt();
32        uart.transmit_sync(buf);
33        buf.len()
34    }
35}
36
37/// Panic handler.
38#[cfg(not(test))]
39#[panic_handler]
40pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! {
41    use core::ptr::addr_of_mut;
42
43    let writer = &mut *addr_of_mut!(WRITER);
44
45    debug::panic_banner(writer, pi);
46    debug::panic_cpu_state(&*addr_of!(CHIP), writer);
47    debug::panic_process_info(&*addr_of!(PROCESSES), &*addr_of!(PROCESS_PRINTER), writer);
48
49    loop {
50        rv32i::support::nop();
51    }
52}
53
54#[cfg(test)]
55#[panic_handler]
56pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! {
57    use core::ptr::addr_of_mut;
58
59    let writer = &mut *addr_of_mut!(WRITER);
60
61    debug::panic_print(
62        writer,
63        pi,
64        &rv32i::support::nop,
65        &*addr_of!(PROCESSES),
66        &*addr_of!(CHIP),
67        &*addr_of!(PROCESS_PRINTER),
68    );
69
70    let _ = writeln!(writer, "{}", pi);
71    loop {}
72}
esp32_c3_board/io.rs

esp32_c3_board/
io.rs
