#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

#[path = "../example_common.rs"]
mod example_common;
use defmt::panic;
use embassy::executor::Spawner;
use embassy_nrf::ppi::Ppi;
use embassy_nrf::saadc::{ChannelConfig, Config, Mode, Saadc, SamplerState};
use embassy_nrf::timer::{Frequency, Timer};
use embassy_nrf::{interrupt, Peripherals};
use example_common::*;

// Demonstrates both continuous sampling and scanning multiple channels driven by a PPI linked timer

#[embassy::main]
async fn main(_spawner: Spawner, mut p: Peripherals) {
    let config = Config::default();
    let channel_1_config = ChannelConfig::single_ended(&mut p.P0_02);
    let channel_2_config = ChannelConfig::single_ended(&mut p.P0_03);
    let channel_3_config = ChannelConfig::single_ended(&mut p.P0_04);
    let mut saadc = Saadc::new(
        p.SAADC,
        interrupt::take!(SAADC),
        config,
        [channel_1_config, channel_2_config, channel_3_config],
    );

    let mut timer = Timer::new(p.TIMER0);
    timer.set_frequency(Frequency::F1MHz);
    timer.cc(0).write(100); // We want to sample at 10KHz
    timer.cc(0).short_compare_clear();

    let mut ppi = Ppi::new(p.PPI_CH0);
    ppi.set_event(timer.cc(0).event_compare());
    ppi.set_task(saadc.task_sample());
    ppi.enable();

    timer.start();

    let mut bufs = [[0; 3 * 500]; 2]; // Each buffer of the double buffer has to be large enough for all channels.
    saadc
        .run_sampler(&mut bufs, Mode::Task, |buf| {
            info!("sample len={}", buf.len());
            SamplerState::Sampled
        })
        .await;
}