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//! BLE interface.
#![no_std]
#![no_main]
mod logger;
mod macros;
mod rtc;
use clint::HandlerArray;
use core::mem;
use cortex_m::asm::wfi;
use cortex_m_rt::{entry, exception, ExceptionFrame};
use log::{info, trace, LevelFilter};
#[allow(unused_imports)]
extern crate panic_semihosting;
use nrf52840_mdk_bsp::{
hal::{
target::{interrupt, Interrupt, UARTE0},
Clocks, Rtc,
},
Board,
};
// TODO:
// * set up serial reader for trinket
// * set up i²c interface for keyboard reports
// * and, finally, bluetooth
// Interrupt handler table.
static HANDLERS: HandlerArray = HandlerArray::new();
#[entry]
fn main() -> ! {
let nrf52 = Board::take().unwrap();
let uart_wrapped = logger::WriteWrapper::new(nrf52.cdc);
let logger = logger::SerialLogger::new(uart_wrapped);
let logger_ref: &'static logger::SerialLogger<UARTE0> = unsafe { mem::transmute(&logger) };
log::set_logger(logger_ref).expect("setting logger");
log::set_max_level(LevelFilter::Trace);
nrf52.RTC0.intenset.write(|w| w.tick().set());
let mut nvic = nrf52.NVIC;
let mut rtc_handler = rtc::setup(Rtc::new(nrf52.RTC0), Clocks::new(nrf52.CLOCK));
HANDLERS.with_overrides(|hs| {
hs.register(0, &mut rtc_handler);
nvic.enable(Interrupt::RTC0);
info!("Bootstrap complete.");
let mut last_tick = rtc::millis();
last_tick -= last_tick % 1024;
loop {
let tick = rtc::millis();
if tick >= last_tick + 1024 {
last_tick = tick;
last_tick -= last_tick % 1024;
trace!(".");
}
wfi();
}
});
unreachable!();
}
#[exception]
fn HardFault(ef: &ExceptionFrame) -> ! {
log::logger().flush();
logln_now!("!!! Hard Fault - ef: {:?} !!!", ef);
logln_now!("flushing log");
loop {
log::logger().flush();
wfi()
}
}
#[interrupt]
fn RTC0() {
HANDLERS.call(0);
}
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