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#![no_std]
#![no_main]
mod dotstar;
mod logger;
mod macros;
mod rtc;
use clint::HandlerArray;
use core::mem;
use core::panic::PanicInfo;
use cortex_m::asm::wfi;
use cortex_m_rt::{entry, exception, ExceptionFrame};
use embedded_hal::digital::v2::OutputPin;
use log::{info, LevelFilter};
use smart_leds::colors;
use smart_leds_trait::SmartLedsWrite;
use trinket_m0::{
self as hal,
clock::GenericClockController,
gpio::{OpenDrain, Output, Pa10, Pa6, Pa7, PfD},
sercom,
target_device::{interrupt, Interrupt},
time::*,
CorePeripherals, Peripherals,
};
// I²C on trinket is on SERCOM2
static mut LED: usize = 0;
static HANDLERS: HandlerArray = HandlerArray::new();
#[entry]
fn main() -> ! {
let mut cp = CorePeripherals::take().expect("taking core peripherals");
let mut dp = Peripherals::take().expect("taking device peripherals");
let mut clocks = GenericClockController::with_internal_32kosc(
dp.GCLK,
&mut dp.PM,
&mut dp.SYSCTRL,
&mut dp.NVMCTRL,
);
let mut pins = hal::Pins::new(dp.PORT);
let uart = hal::uart(
&mut clocks,
115_200.hz(),
dp.SERCOM0,
&mut cp.NVIC,
&mut dp.PM,
pins.d3,
pins.d4,
&mut pins.port,
);
let mut red_led = pins.d13.into_open_drain_output(&mut pins.port);
red_led.set_low().expect("turning off red LED");
unsafe { LED = mem::transmute(&red_led) }
let mut dotstar = dotstar::new(
dp.SERCOM1,
pins.swdio,
pins.dotstar_di,
pins.dotstar_ci,
&mut pins.port,
&mut dp.PM,
&mut clocks,
);
let black = [colors::BLACK];
dotstar
.write(black.iter().cloned())
.expect("turning off dotstar");
// We do the transmute because, while all the underlying data is
// static, we're unable to get a referecence to the UART or LED
// until run-time. Another option would be to use Option in the
// SerialLogger definition, but that requires a check every time
// they might be used.
let uart_wrapped = logger::WriteWrapper::new(uart);
let logger = logger::SerialLogger::new(uart_wrapped, red_led);
// Wow, would I love to not be annotating this type.
let logger_ref: &'static logger::SerialLogger<
sercom::UART0<sercom::Sercom0Pad3<Pa7<PfD>>, sercom::Sercom0Pad2<Pa6<PfD>>, (), ()>,
Pa10<Output<OpenDrain>>,
> = unsafe { mem::transmute(&logger) };
unsafe { log::set_logger_racy(logger_ref).expect("couldn't set logger") };
log::set_max_level(LevelFilter::Trace);
let mut rtc_handler = rtc::setup(dp.RTC, &mut clocks);
HANDLERS.with_overrides(|hs| {
hs.register(0, &mut rtc_handler);
cp.NVIC.enable(Interrupt::RTC);
info!("Bootstrap complete.");
loop {
wfi()
}
});
unreachable!();
}
#[panic_handler]
fn panic_handler(pi: &PanicInfo) -> ! {
let red_led: &mut Pa10<Output<OpenDrain>> = unsafe { mem::transmute(LED) };
red_led.set_high().ok();
logln_now!("~~~ PANIC ~~~");
logln_now!("{}", pi);
logln_now!("flushing log");
loop {
log::logger().flush();
wfi()
}
}
#[exception]
fn HardFault(ef: &ExceptionFrame) -> ! {
let red_led: &mut Pa10<Output<OpenDrain>> = unsafe { mem::transmute(LED) };
red_led.set_high().ok();
log::logger().flush();
logln_now!("!!! Hard Fault - ef: {:?} !!!", ef);
logln_now!("flushing log");
loop {
log::logger().flush();
wfi()
}
}
#[interrupt]
fn RTC() {
HANDLERS.call(0);
}
#[interrupt]
fn USB() {
HANDLERS.call(1);
}
|
