DSPG_VoiceRecognition.ino

/**
   @file DSPG_VoiceRecognition.ino
   @author rakwireless.com
   @brief This example shows how to run a voice recognition model file on the RAK18080 DSPG board.
    You can choose the voice recognition model file you need to load by modifying the macros DSPG_USE_MODEL
    and COMMAND_GROUP_CHOOSE. DSPG_USE_MODEL can be MODEL_GROUP1, MODEL_GROUP2, MODEL_GROUP3 or MODEL_GROUP4,
    the value of COMMAND_GROUP_CHOOSE must correspond to the value of DSPG_USE_MODEL,
    for example: if select MODEL_GROUP1, "#define DSPG_USE_MODEL MODEL_GROUP1" then "#define COMMAND_GROUP_CHOOSE 1",
                 if select MODEL_GROUP2, "#define DSPG_USE_MODEL MODEL_GROUP2" then "#define COMMAND_GROUP_CHOOSE 2".
    All voice command words are printed on the serial port after booting.
    Trigger word can be "Hey RAK Star", "Hey Helium" or "Hey RAK Cloud".
    When the DSPG recognizes a voice command word, the state of the two LED indicators on the WisBase flips once.
   @note This example need use the RAK18080、RAK18003 and RAK18060 modules.
   @version 0.1
   @date 2022-09-06
   @copyright Copyright (c) 2022
*/
#include "audio.h" // Click here to install the library: http://librarymanager/All#RAKwireless-Audio

#define DSPG_USE_MODEL  MODEL_GROUP1  //select voice model can be MODEL_GROUP1、MODEL_GROUP2、MODEL_GROUP3、MODEL_GROUP4
#define COMMAND_GROUP_CHOOSE  1  //the number must be the same as the number of group selected,eg: 1 MODEL_GROUP1; 2 MODEL_GROUP2; 3 MODEL_GROUP3; 4 MODEL_GROUP4

char cmd_string[60] = "";
int cmd_id = 0;
uint32_t trigger_count = 0;
volatile uint8_t int_flag = 0;
uint8_t led_state = 0;

void EventProcess(void);

void setup() {

  pinMode(WB_IO2, OUTPUT);
  digitalWrite(WB_IO2, LOW);
  delay(1000);
  digitalWrite(WB_IO2, HIGH);
  delay(500);
  pinMode(LED_GREEN, OUTPUT);
  digitalWrite(LED_GREEN, LOW);
  pinMode(LED_BLUE, OUTPUT);
  digitalWrite(LED_BLUE, LOW);

  time_t timeout = millis();
  Serial.begin(115200);
  while (!Serial)
  {
    if ((millis() - timeout) < 2000)
    {
      delay(100);
    }
    else
    {
      break;
    }
  }

  Serial.println("=====================================");
  DSPG_USER.SetActiveCommandGroup(COMMAND_GROUP_CHOOSE);  //it is necessary choose one voice model group before init DSPG.
  while (DSPG_USER.begin(DSPG_USE_MODEL, sizeof(DSPG_USE_MODEL)))
  {
    Serial.println("Please check !!!");
    delay(1000);
  }
  while (DSPG_USER.micCheck() == 0) //Check if the microphone board is connected on the RAK18003
  {
    Serial.println("There is no microphone board, please check !");
    delay(1000);
  }
  delay(100);
  //config interrupt
  DSPG_USER.detectedCallback(EventProcess);
  DSPG_USER.readIoState();  //read the RAK18003 chip IO state
  Serial.printf("init ok\r\n");
  DSPG_USER.echoCommands(COMMAND_GROUP_CHOOSE);
  int_flag = 0;

  digitalWrite(LED_BLUE, HIGH);
  digitalWrite(LED_GREEN, HIGH);
}

void loop()
{
  if (int_flag == 1)
  {
    trigger_count++;
    Serial.printf("***************** %d\r\n", trigger_count);
    DSPG_USER.eventCallBack(cmd_string, &cmd_id);
    uint16_t pin_state = DSPG_USER.readIoState();   //this is necessary to read IO expander register
    //    Serial.printf("pinstate:%04X\r\n", pin_state);
    Serial.printf("CMD ID: %d\r\n", cmd_id);
    Serial.println(cmd_string);
    led_state = !led_state;
    digitalWrite(LED_BLUE, led_state);
    digitalWrite(LED_GREEN, led_state);
    //    int id_case = cmd_id;
    if ((cmd_id >= 1001) && (cmd_id <= 1003))
    {

    }
    int_flag = 0; //clear the interrupt flag
  }
}
void EventProcess(void)
{
  int_flag = 1;
}