File main.cpp

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Source Code

#include "daisy_seed.h"

using namespace daisy;

static constexpr const size_t kTransferSize = 16384;

static DaisySeed                hw;
static SdmmcHandler             sdmmc;
static FatFSInterface           fsi;
static WavPlayer<kTransferSize> player;

void AudioCallback(AudioHandle::InputBuffer  in,
                   AudioHandle::OutputBuffer out,
                   size_t                    size)
{
    for(size_t i = 0; i < size; i++)
    {
        // Fill two channels of data per sample
        float samps[2];
        player.Stream(samps, 2);
        out[0][i] = samps[0];
        out[1][i] = samps[1];
    }
}

int main(void)
{
    hw.Init(true);

    SdmmcHandler::Config sdcfg;
    sdcfg.Defaults();
    sdcfg.speed = SdmmcHandler::Speed::STANDARD;
    sdcfg.width = SdmmcHandler::BusWidth::BITS_1;
    sdmmc.Init(sdcfg);
    fsi.Init(FatFSInterface::Config::Media::MEDIA_SD);
    f_mount(&fsi.GetSDFileSystem(), "/", 1);

    if (player.Init("loop.wav") != WavPlayer<kTransferSize>::Result::Ok) {
      // Error..
      while(true) {
        // Blink really fast if there was a problem
        hw.SetLed((System::GetNow() & 127) < 63);
      }
    }

    player.SetLooping(true);
    player.SetPlaying(true);
    player.Restart();

    hw.StartAudio(AudioCallback);

    while(1)
    {
        hw.SetLed((System::GetNow() & 511) < 255);

        player.Prepare();
    }
}