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//! Standard library support crate for an Raspberry Pi Pico with an RP2040.
//!
//! The blinky support example comes from the rp-hal-boards example, available
//! <https://github.com/rp-rs/rp-hal-boards/blob/5135e3dafe3e69b112e6d2d72cfb1856a7679b82/boards/rp-pico/examples/pico_blinky.rs#L1>
//! and licensed MIT or APACHE-2.0.
#![no_std]
#![feature(rustc_private)]
extern crate fusible;
use core::pin::Pin;
use rust_threadx_cortex_m as _;
use rust_threadx_stdio_semihosting as _;
use rust_threadx_sync_single_core as _;
use embedded_hal::digital::OutputPin;
use rp_pico::hal;
use rp_pico::hal::pac;
#[doc(hidden)]
#[unsafe(no_mangle)]
pub unsafe extern "C" fn _tx_initialize_low_level() {
use cortex_m::{
Peripherals,
peripheral::{scb::SystemHandler, syst::SystClkSource},
};
cortex_m::interrupt::disable();
unsafe {
let Peripherals {
mut SYST, mut SCB, ..
} = Peripherals::steal();
SCB.set_priority(SystemHandler::SysTick, 0x40);
SCB.set_priority(SystemHandler::PendSV, 0xff);
SCB.set_priority(SystemHandler::SVCall, 0xff);
SYST.set_clock_source(SystClkSource::Core);
SYST.set_reload(125_000_000 / 100 - 1);
SYST.clear_current();
SYST.enable_interrupt();
SYST.enable_counter();
}
}
use fusible::thread::{StaticStack, Thread, ThreadContext};
static STACK: StaticStack<512> = StaticStack::new();
static THREAD: ThreadContext = Thread::context();
#[unsafe(no_mangle)]
#[doc(hidden)]
pub extern "C" fn __rust_threadx_app_define() {
let mut pac = pac::Peripherals::take().unwrap();
let mut watchdog = hal::Watchdog::new(pac.WATCHDOG);
hal::clocks::init_clocks_and_plls(
rp_pico::XOSC_CRYSTAL_FREQ,
pac.XOSC,
pac.CLOCKS,
pac.PLL_SYS,
pac.PLL_USB,
&mut pac.RESETS,
&mut watchdog,
)
.ok()
.unwrap();
let sio = hal::Sio::new(pac.SIO);
let pins = rp_pico::Pins::new(
pac.IO_BANK0,
pac.PADS_BANK0,
sio.gpio_bank0,
&mut pac.RESETS,
);
let mut led_pin = pins.led.into_push_pull_output();
Thread::create(
Pin::static_ref(&THREAD),
STACK.take().unwrap(),
&Default::default(),
move || loop {
led_pin.set_high().unwrap();
fusible::thread::sleep(50);
led_pin.set_low().unwrap();
fusible::thread::sleep(50);
},
)
.unwrap();
}
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