Rusty_CryptoAuthLib 1.0.0

A platform agnostic I2C driver for Microchip's Crypto Authentication HW (i.e. secure element `ATECC608A`), written in pure Rust.
Documentation 
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#![no_main]
#![no_std]
// #![allow(warnings)]

extern crate nrf52840_hal as hal;
extern crate nrf52840_mdk;
extern crate panic_halt;
use cortex_m_rt::{entry, exception};

use hal::gpio::{p0, p1};
use hal::target::Peripherals;
use hal::timer::Timer;
use hal::twim::{self, Twim};
// use cortex_m_semihosting::hprintln;
use nrf52840_mdk::Pins;
use Rusty_CryptoAuthLib::ATECC608A;

#[entry]
fn main() -> ! {
    let p = Peripherals::take().unwrap();
    let pins = Pins::new(p0::Parts::new(p.P0), p1::Parts::new(p.P1));
    let scl = pins.p27.into_floating_input().degrade();
    let sda = pins.p26.into_floating_input().degrade();

    let i2c_pins = twim::Pins { scl, sda };

    let i2c = Twim::new(p.TWIM1, i2c_pins, twim::Frequency::K100);
    let delay = Timer::new(p.TIMER0);
    let timer = Timer::new(p.TIMER1);
    let mut atecc608a = ATECC608A::new(i2c, delay, timer).unwrap();

    // INFO COMMAND EXAMPLE
    let revision_id = &[0x00, 0x00, 0x60, 0x02];
    let info = match atecc608a.atcab_info() {
        Ok(v) => v,
        Err(e) => panic!("ERROR: {:?}", e),
    };

    assert_eq!(&info[..], revision_id);
    loop {}
}

#[exception]
fn HardFault(ef: &cortex_m_rt::ExceptionFrame) -> ! {
    panic!("HardFault at {:#?}", ef);
}

#[exception]
fn DefaultHandler(irqn: i16) {
    panic!("Unhandled exception (IRQn = {})", irqn);
}