arty_e21/
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::panic::PanicInfo;
6use kernel::debug;
7use kernel::hil::gpio;
8use kernel::hil::led;
9
10/// Panic handler.
11#[cfg(not(test))]
12#[panic_handler]
13pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! {
14    // turn off the non panic leds, just in case
15    let led_green = &sifive::gpio::GpioPin::new(
16        arty_e21_chip::gpio::GPIO0_BASE,
17        sifive::gpio::pins::pin1,
18        sifive::gpio::pins::pin1::SET,
19        sifive::gpio::pins::pin1::CLEAR,
20    );
21    gpio::Configure::make_output(led_green);
22    gpio::Output::clear(led_green);
23
24    let led_blue = &sifive::gpio::GpioPin::new(
25        arty_e21_chip::gpio::GPIO0_BASE,
26        sifive::gpio::pins::pin0,
27        sifive::gpio::pins::pin0::SET,
28        sifive::gpio::pins::pin0::CLEAR,
29    );
30    gpio::Configure::make_output(led_blue);
31    gpio::Output::clear(led_blue);
32
33    let led_red_pin = &mut sifive::gpio::GpioPin::new(
34        arty_e21_chip::gpio::GPIO0_BASE,
35        sifive::gpio::pins::pin2,
36        sifive::gpio::pins::pin2::SET,
37        sifive::gpio::pins::pin2::CLEAR,
38    );
39
40    let led_red = &mut led::LedHigh::new(led_red_pin);
41
42    debug::panic::<_, sifive::uart::Uart, _, _>(
43        &mut [led_red],
44        sifive::uart::UartPanicWriterConfig {
45            registers: arty_e21_chip::uart::UART0_BASE,
46            clock_frequency: 32_000_000,
47            params: kernel::hil::uart::Parameters {
48                baud_rate: 115200,
49                stop_bits: kernel::hil::uart::StopBits::One,
50                parity: kernel::hil::uart::Parity::None,
51                hw_flow_control: false,
52                width: kernel::hil::uart::Width::Eight,
53            },
54        },
55        pi,
56        &rv32i::support::nop,
57        crate::PANIC_RESOURCES.get(),
58    )
59}
arty_e21/io.rs

arty_e21/
io.rs
