device-envoy-rp 0.1.0

Build Pico applications with LED panels, easy Wi-Fi, and composable device abstractions
Documentation 
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#![allow(missing_docs)]
//! Resample a compiled-in clip from 22.05 kHz to narrowband 8 kHz.
//!
//! Wiring:
//! - Data pin (`DIN`) -> GP8
//! - Bit clock pin (`BCLK`) -> GP9
//! - Word select pin (`LRC` / `LRCLK`) -> GP10
//! - Button -> GP13 to GND (starts playback)

#![no_std]
#![no_main]

use core::convert::Infallible;

use defmt::info;
use device_envoy_rp::Result;
use device_envoy_rp::audio_player::{
    AtEnd, AudioPlayer as _, Gain, NARROWBAND_8000_HZ, VOICE_22050_HZ, Volume, audio_player,
    pcm_clip,
};
use device_envoy_rp::button::Button as _;
use device_envoy_rp::button::{ButtonRp, PressedTo};
use embassy_executor::Spawner;
use {defmt_rtt as _, panic_probe as _};

audio_player! {
    AudioPlayer8K {
        data_pin: PIN_8,
        bit_clock_pin: PIN_9,
        word_select_pin: PIN_10,
        sample_rate_hz: NARROWBAND_8000_HZ,
        max_volume: Volume::percent(50),
    }
}

pcm_clip! {
    Nasa {
        file: "data/audio/nasa_22k.s16",
        source_sample_rate_hz: VOICE_22050_HZ,
        target_sample_rate_hz: AudioPlayer8K::SAMPLE_RATE_HZ,
    }
}

pcm_clip! {
    Digit0 {
        file: "data/audio/0_22050.s16",
        source_sample_rate_hz: VOICE_22050_HZ,
        target_sample_rate_hz: AudioPlayer8K::SAMPLE_RATE_HZ,
    }
}

pcm_clip! {
    Digit1 {
        file: "data/audio/1_22050.s16",
        source_sample_rate_hz: VOICE_22050_HZ,
        target_sample_rate_hz: AudioPlayer8K::SAMPLE_RATE_HZ,
    }
}

pcm_clip! {
    Digit2 {
        file: "data/audio/2_22050.s16",
        source_sample_rate_hz: VOICE_22050_HZ,
        target_sample_rate_hz: AudioPlayer8K::SAMPLE_RATE_HZ,
    }
}

pcm_clip! {
    Digit3 {
        file: "data/audio/3_22050.s16",
        source_sample_rate_hz: VOICE_22050_HZ,
        target_sample_rate_hz: AudioPlayer8K::SAMPLE_RATE_HZ,
    }
}

#[embassy_executor::main]
async fn main(spawner: Spawner) -> ! {
    let err = inner_main(spawner).await.unwrap_err();
    core::panic!("{err}");
}

async fn inner_main(spawner: Spawner) -> Result<Infallible> {
    const DIGITS: [&AudioPlayer8KPlayable; 4] = [
        &Digit0::pcm_clip(),
        &Digit1::pcm_clip(),
        &Digit2::pcm_clip(),
        &Digit3::pcm_clip(),
    ];

    const NASA_8K: &AudioPlayer8KPlayable = &Nasa::pcm_clip().with_gain(Gain::percent(25));

    let p = embassy_rp::init(Default::default());
    let mut button = ButtonRp::new(p.PIN_13, PressedTo::Ground);
    let audio_player8k =
        AudioPlayer8K::new(p.PIN_8, p.PIN_9, p.PIN_10, p.PIO0, p.DMA_CH0, spawner)?;

    info!(
        "NASA source clip: {} Hz, {} samples",
        Nasa::SAMPLE_RATE_HZ,
        Nasa::PCM_SAMPLE_COUNT
    );
    info!(
        "NASA resampled clip: {} Hz, {} samples",
        AudioPlayer8K::SAMPLE_RATE_HZ,
        Nasa::PCM_SAMPLE_COUNT
    );
    info!("Press GP13 button to play countdown 3,2,1,0 then NASA (8 kHz)");

    loop {
        button.wait_for_press().await;
        audio_player8k.play(
            [DIGITS[3], DIGITS[2], DIGITS[1], DIGITS[0], NASA_8K],
            AtEnd::Stop,
        );
    }
}