cc2538-hal 0.1.0

Hardware abstraction layer for the CC2538 System-On-Chip
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#![no_main]
#![no_std]
#![feature(default_alloc_error_handler)]

use core::time::Duration;

use cortex_m_rt as rt;
use rt::entry;

use panic_rtt_target as _;

use mutiny_async::task;

extern crate alloc;
use alloc_cortex_m::CortexMHeap;

#[global_allocator]
static ALLOCATOR: CortexMHeap = CortexMHeap::empty();

use rtt_target::{rprintln, rtt_init_print};

use cc2538_hal::{sys_ctrl::*, timers::*};
use cc2538_pac as pac;

#[entry]
fn main() -> ! {
    rtt_init_print!();

    // Setup the allocator
    let start = cortex_m_rt::heap_start() as usize;
    let size = 4048;
    unsafe { ALLOCATOR.init(start, size) };

    match inner_main() {
        Ok(()) => cortex_m::peripheral::SCB::sys_reset(),
        Err(e) => panic!("{}", e),
    }
}

fn inner_main() -> Result<(), &'static str> {
    let mut _core_periph = cortex_m::Peripherals::take().ok_or("unable to get core peripherals")?;
    let periph = pac::Peripherals::take().ok_or("unable to get peripherals")?;

    // Setup the clock
    let mut sys_ctrl = periph.SYS_CTRL.constrain();
    sys_ctrl.set_sys_div(ClockDiv::Clock16Mhz);
    sys_ctrl.set_io_div(ClockDiv::Clock16Mhz);
    sys_ctrl.enable_gpt0_in_active_mode();
    sys_ctrl.enable_gpt0_in_sleep_mode();
    sys_ctrl.enable_gpt0_in_deep_sleep_mode();
    let clocks = sys_ctrl.freeze();
    let clock_config = clocks.config();

    unsafe {
        cortex_m::interrupt::enable();
    }

    let timer0 = periph.GPTIMER0.split();
    let (mut timer0, timer0a, timer0b) = timer0.split();

    let mut timer0a = timer0a.into_one_shot_timer(&mut timer0);
    let mut timer0b = timer0b.into_one_shot_timer(&mut timer0);

    task::spawn(async move {
        loop {
            timer0a = timer0a
                .wait(Duration::from_millis(250), &clock_config)
                .await;
            rprintln!("timera");
        }
    });

    task::block_on(async move {
        loop {
            timer0b = timer0b.wait(Duration::from_secs(1), &clock_config).await;
            rprintln!("timerb");
        }
    })
}