redboard_redv/
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::gpio;
11use kernel::hil::led;
12
13use crate::CHIP;
14use crate::PROCESSES;
15use crate::PROCESS_PRINTER;
16
17struct Writer {}
18
19static mut WRITER: Writer = Writer {};
20
21impl Write for Writer {
22    fn write_str(&mut self, s: &str) -> ::core::fmt::Result {
23        self.write(s.as_bytes());
24        Ok(())
25    }
26}
27
28impl IoWrite for Writer {
29    fn write(&mut self, buf: &[u8]) -> usize {
30        let uart = sifive::uart::Uart::new(e310_g002::uart::UART0_BASE, 16_000_000);
31        uart.transmit_sync(buf);
32        buf.len()
33    }
34}
35
36/// Panic handler.
37#[cfg(not(test))]
38#[panic_handler]
39pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! {
40    // turn off the non panic leds, just in case
41
42    use core::ptr::{addr_of, addr_of_mut};
43    let led_green = sifive::gpio::GpioPin::new(
44        e310_g002::gpio::GPIO0_BASE,
45        sifive::gpio::pins::pin19,
46        sifive::gpio::pins::pin19::SET,
47        sifive::gpio::pins::pin19::CLEAR,
48    );
49    gpio::Configure::make_output(&led_green);
50    gpio::Output::set(&led_green);
51
52    let led_blue = sifive::gpio::GpioPin::new(
53        e310_g002::gpio::GPIO0_BASE,
54        sifive::gpio::pins::pin21,
55        sifive::gpio::pins::pin21::SET,
56        sifive::gpio::pins::pin21::CLEAR,
57    );
58    gpio::Configure::make_output(&led_blue);
59    gpio::Output::set(&led_blue);
60
61    let led_red_pin = sifive::gpio::GpioPin::new(
62        e310_g002::gpio::GPIO0_BASE,
63        sifive::gpio::pins::pin22,
64        sifive::gpio::pins::pin22::SET,
65        sifive::gpio::pins::pin22::CLEAR,
66    );
67    let led_red = &mut led::LedLow::new(&led_red_pin);
68    let writer = &mut *addr_of_mut!(WRITER);
69
70    debug::panic(
71        &mut [led_red],
72        writer,
73        pi,
74        &rv32i::support::nop,
75        &*addr_of!(PROCESSES),
76        &*addr_of!(CHIP),
77        &*addr_of!(PROCESS_PRINTER),
78    )
79}
redboard_redv/io.rs

redboard_redv/
io.rs
