rpi-hal 0.8.0

Hardware abstraction layer for bare-metal Raspberry Pi: BCM2836/BCM2837 (Pi 2, Pi 3), with preliminary BCM2711 (Pi 4) and BCM2835 (Pi 1, Pi Zero) support
Documentation 
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#![no_std]
#![no_main]

use core::fmt::Write;
use rpi_hal::halt;
use rpi_hal::{pac, timer::Timer, uart::Uart};

#[panic_handler]
fn panic(info: &core::panic::PanicInfo) -> ! {
    let peripherals = unsafe { pac::Peripherals::steal() };
    let mut uart = Uart::init(&peripherals.GPIO, peripherals.UART0);
    let _ = writeln!(uart, "PANIC: {info}");
    halt();
}

#[no_mangle]
pub extern "C" fn kmain() -> ! {
    let peripherals = unsafe { pac::Peripherals::steal() };
    let mut uart = Uart::init(&peripherals.GPIO, peripherals.UART0);
    let timer = Timer::new(peripherals.SYSTMR);

    loop {
        let now = timer.now_micros();
        let _ = writeln!(uart, "t = {now} us");
        timer.delay_ms(1000);
    }
}