#![no_std]
#![no_main]
use panic_halt as _;
use rp2040_hal as hal;
use embedded_hal::PwmPin;
use rp2040_hal::clocks::Clock;
use hal::pac;
#[link_section = ".boot2"]
#[used]
pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER_GENERIC_03H;
const LOW: u16 = 0;
const HIGH: u16 = 25000;
const XTAL_FREQ_HZ: u32 = 12_000_000u32;
#[rp2040_hal::entry]
fn main() -> ! {
let mut pac = pac::Peripherals::take().unwrap();
let core = pac::CorePeripherals::take().unwrap();
let mut watchdog = hal::Watchdog::new(pac.WATCHDOG);
let clocks = hal::clocks::init_clocks_and_plls(
XTAL_FREQ_HZ,
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 = hal::gpio::Pins::new(
pac.IO_BANK0,
pac.PADS_BANK0,
sio.gpio_bank0,
&mut pac.RESETS,
);
let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().to_Hz());
let mut pwm_slices = hal::pwm::Slices::new(pac.PWM, &mut pac.RESETS);
let pwm = &mut pwm_slices.pwm4;
pwm.set_ph_correct();
pwm.enable();
let channel = &mut pwm.channel_b;
channel.output_to(pins.gpio25);
loop {
for i in (LOW..=HIGH).skip(100) {
delay.delay_us(8);
channel.set_duty(i);
}
for i in (LOW..=HIGH).rev().skip(100) {
delay.delay_us(8);
channel.set_duty(i);
}
delay.delay_ms(500);
}
}