File ExternalCodec.cpp

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Source Code

#include "daisy_seed.h"

using namespace daisy;

DaisySeed hw;

void AudioCallback(AudioHandle::InputBuffer  in,
                   AudioHandle::OutputBuffer out,
                   size_t                    size)
{
    for(size_t i = 0; i < size; i++)
    {
        out[0][i] = in[0][i];
        out[1][i] = in[1][i];
        out[2][i] = in[2][i];
        out[3][i] = in[3][i];
    }
}

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

    SaiHandle         external_sai_handle;
    SaiHandle::Config external_sai_cfg;
    external_sai_cfg.periph          = SaiHandle::Config::Peripheral::SAI_2;
    external_sai_cfg.sr              = SaiHandle::Config::SampleRate::SAI_48KHZ;
    external_sai_cfg.bit_depth       = SaiHandle::Config::BitDepth::SAI_24BIT;
    external_sai_cfg.a_sync          = SaiHandle::Config::Sync::SLAVE;
    external_sai_cfg.b_sync          = SaiHandle::Config::Sync::MASTER;
    external_sai_cfg.a_dir           = SaiHandle::Config::Direction::TRANSMIT;
    external_sai_cfg.b_dir           = SaiHandle::Config::Direction::RECEIVE;
    external_sai_cfg.pin_config.fs   = seed::D27;
    external_sai_cfg.pin_config.mclk = seed::D24;
    external_sai_cfg.pin_config.sck  = seed::D28;
    external_sai_cfg.pin_config.sb   = seed::D25;
    external_sai_cfg.pin_config.sa   = seed::D26;

    external_sai_handle.Init(external_sai_cfg);

    AudioHandle::Config audio_cfg;
    audio_cfg.blocksize  = 48;
    audio_cfg.samplerate = SaiHandle::Config::SampleRate::SAI_48KHZ;
    audio_cfg.postgain   = 0.5f;

    hw.audio_handle.Init(audio_cfg, hw.AudioSaiHandle(), external_sai_handle);

    hw.StartAudio(AudioCallback);

    while(1) {}
}