#![no_std]
#![no_main]

use esp32_hal::{clock::ClockControl, pac::Peripherals, prelude::*, timer::TimerGroup, Rtc, IO, Delay};
use esp_backtrace as _;
use xtensa_lx_rt::entry;
use esp_println::println;


#[entry]
fn main() -> ! {
    let peripherals = Peripherals::take().unwrap();
    let system = peripherals.DPORT.split();
    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();

    // Disable the RTC and TIMG watchdog timers
    let mut rtc = Rtc::new(peripherals.RTC_CNTL);
    let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
    let mut wdt0 = timer_group0.wdt;
    let timer_group1 = TimerGroup::new(peripherals.TIMG1, &clocks);
    let mut wdt1 = timer_group1.wdt;
    
    rtc.rwdt.disable();
    wdt0.disable();
    wdt1.disable();

    let cs = io.pins.gpio5.into_push_pull_output();
    let rst = io.pins.gpio16.into_push_pull_output();
    let busy = io.pins.gpio4.into_floating_input();
    let dc = io.pins.gpio17.into_push_pull_output();

    let mut spi = spi::Spi::new_no_cs_no_miso(
    // let spi = spi::Spi::new(
        peripherals.SPI2, // Real HW working with SPI2, but Wokwi seems to work only with SPI3
        io.pins.gpio18,   // SCLK
        io.pins.gpio23,   // MOSI
        4u32.MHz(),
        spi::SpiMode::Mode0,
        &mut system.peripheral_clock_control,
        &clocks,
    );

    loop {
        println!("Hello World!");
        delay.delay_ms(1000u32);
    }
}