reSpeaker XVF3800 USB 麦克风阵列与 XIAO ESP32S3 DoA 和 VAD

简介

ReSpeaker XVF3800 是基于 XMOS XVF3800 的多麦克风语音处理解决方案，专为需要实时音频智能的嵌入式应用而设计。XVF3800 内部计算语音活动检测（VAD）和到达方向（DoA），以指示何时存在语音以及语音来源的方向。这些推理结果可以通过主机 MCU 使用基于资源的命令通过 I2C 直接访问，从而实现语音唤醒、声源定位和方向感知反馈等功能，而无需在主机上处理原始音频。

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note

支持此代码的固件是 respeaker_xvf3800_i2s_master_dfu_firmware_v1.0.x_48k_test5.bin。因此请确保首先刷写固件

Arduino 代码

#include <Wire.h>

#define XMOS_ADDR 0x2C  // I2C 7-bit address

#define GPO_SERVICER_RESID            20
#define GPO_SERVICER_RESID_LED_EFFECT 12
#define GPO_SERVICER_RESID_DOA        19
#define GPO_DOA_READ_NUM_BYTES        4

void setup() {
  Serial.begin(115200);
  while (!Serial);
  Wire.begin();
  delay(2000);
  Serial.println("XVF3800 DoA Read Test Starting...");
  write_led_effect(4);
}

void loop() {
  uint16_t doa_values[2] = {0};
  uint8_t status = 0xFF;

  bool success = read_doa_values((uint8_t *)doa_values, &status);

  if (success) {
    Serial.print("I2C Communication SUCCESS. Status byte: 0x");
    Serial.print(status, HEX);
    Serial.print(" | DOA_VALUE: ");
    Serial.print(doa_values[0]);
    Serial.print(" | SPEECH_DETECTED: ");
    Serial.println(doa_values[1]);
  } else {
    Serial.println("Failed to read DoA values.");
  }

  delay(1000);
}

bool read_versions(uint8_t *buffer, uint8_t *status) {
  const uint8_t resid = 48;
  const uint8_t cmd = 0 | 0x80;
  const uint8_t read_len = 3;

  // Step 1: Write command
  Wire.beginTransmission(XMOS_ADDR);
  Wire.write(resid);
  Wire.write(cmd);
  Wire.write(read_len + 1);
  uint8_t result = Wire.endTransmission();

  if (result != 0) {
    Serial.print("I2C Write Error: ");
    Serial.println(result);
    return false;
  }

  // Step 2: Read response (status + payload)
  Wire.requestFrom(XMOS_ADDR, (uint8_t)(read_len + 1));
  if (Wire.available() < read_len + 1) {
    Serial.println("I2C Read Error: Not enough data received.");
    return false;
  }

  *status = Wire.read();
  for (uint8_t i = 0; i < read_len; i++) {
    buffer[i] = Wire.read();
  }

  return true;
}

bool read_doa_values(uint8_t *buffer, uint8_t *status) {
  const uint8_t resid = GPO_SERVICER_RESID;
  const uint8_t cmd = GPO_SERVICER_RESID_DOA | 0x80;
  const uint8_t read_len = GPO_DOA_READ_NUM_BYTES;

  // Step 1: Write command
  Wire.beginTransmission(XMOS_ADDR);
  Wire.write(resid);
  Wire.write(cmd);
  Wire.write(read_len + 1);
  uint8_t result = Wire.endTransmission();

  if (result != 0) {
    Serial.print("I2C Write Error: ");
    Serial.println(result);
    return false;
  }

  // Step 2: Read response (status + payload)
  Wire.requestFrom(XMOS_ADDR, (uint8_t)(read_len + 1));
  if (Wire.available() < read_len + 1) {
    Serial.println("I2C Read Error: Not enough data received.");
    return false;
  }

  *status = Wire.read();
  for (uint8_t i = 0; i < read_len; i++) {
    buffer[i] = Wire.read();
  }

  return true;
}

void write_led_effect(uint8_t effect) {
  Wire.beginTransmission(XMOS_ADDR); // Begin I2C transmission to XVF3800
  Wire.write(GPO_SERVICER_RESID);                 // Write the resource ID
  Wire.write(GPO_SERVICER_RESID_LED_EFFECT);                   // Write the command ID
  Wire.write(1);       // Write number of payload bytes
  Wire.write(effect);           // Write each payload byte
  Wire.endTransmission();           // End the I2C transmission
}

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