Tuyaopen/onchip Vad

TuyaOpen On-Chip VAD (voice activity detection)

Works on the mic stream

VAD analyses microphone audio. Set up audio input first (see the audio peripheral skill), then feed captured PCM frames to VAD and poll its status.

On-chip — no Kconfig, no TDD

• Platform-provided. Do NOT write CONFIG_ENABLE_VAD. No app_default.config change.
• No board_register_hardware(). Call tkl_vad_* directly. Single engine (no pins) — record as onchip:vad in used-peripherals.json if wanted.

Init, start, feed, poll

Config fields come from your audio format. Below are the real fields used by the SDK.

#include "tal_api.h"
#include "tkl_vad.h"

void app_vad_init(uint32_t sample_rate, uint8_t channels)
{
    TKL_VAD_CONFIG_T cfg = {0};
    cfg.sample_rate       = sample_rate;     /* match the mic, e.g. 16000 */
    cfg.channel_num       = channels;        /* e.g. 1 */
    cfg.speech_min_ms     = 300;             /* min speech to assert SPEECH */
    cfg.noise_min_ms      = 800;             /* min silence to drop back */
    cfg.frame_duration_ms = 10;              /* feed in 10 ms frames */
    cfg.scale             = 1.0f;
    tkl_vad_init(&cfg);
    tkl_vad_start();
}

/* For each captured PCM frame: feed it, then check status. */
void app_vad_on_pcm(uint8_t *pcm, uint32_t len)
{
    tkl_vad_feed(pcm, len);
    if (tkl_vad_get_status() == TKL_VAD_STATUS_SPEECH) {
        /* speaking */
    } else {
        /* silence (TKL_VAD_STATUS_NONE) */
    }
}

Stop/restart around a session with tkl_vad_stop() / tkl_vad_start().

API Reference

Troubleshooting

Reference

SDK: src/ai_components/ai_audio/src/ai_audio_input.c (tkl_vad_init with the fields above, tkl_vad_start/feed/get_status/stop).