J-Botに英語を喋らせる

import stamp.core.*;
/*
 * Hello world を喋らせる
 */

public class EmicTest1 {
// Emic Commands (Hex Mode)
  final static int Say     = 0x00;  //   say Engish text
  final static int Volume  = 0x01;  //   set volume, 0 - 7
  final static int Speed   = 0x02;  //   set speed, 0 - 4
  final static int Pitch   = 0x03;  //   set pitch, 0 - 6
  final static int AddAbbr = 0x04;  //   add abbreviation
  final static int DelAbbr = 0x05;  //   delete abbreviation
  final static int ListAbbr= 0x06;  //   list abbreviations
  final static int Version = 0x07;  //   get version
  final static int Reset   = 0x08;  //   soft reset
  final static int Audio   = 0x09;  //   enable audio in
  final static int PhT     = 0x10;  //   start of phonetic text
  final static int Help    = 0xFE;  //   display help
  final static int EOM     = 0xAA;  //   end of message
  final static int OK      = 0x55;  //   "okay" for hex mode

  final static int Space   = 0x20;  //  ASCII space character

  final static int SERIAL_TX_PIN  = CPU.pin0;
  final static int SERIAL_RTS_PIN = CPU.pin3;
  final static int SERIAL_CTS_PIN = CPU.pin2;
  final static int SERIAL_RX_PIN  = CPU.pin1;

  static Uart rxUart = new Uart( Uart.dirReceive, SERIAL_RX_PIN, Uart.dontInvert,
                           SERIAL_CTS_PIN,Uart.speed2400,
                           Uart.stop1 );
  static Uart txUart = new Uart( Uart.dirTransmit, SERIAL_TX_PIN,Uart.dontInvert,
                           SERIAL_RTS_PIN,  Uart.speed2400,
                           Uart.stop1 );

  public static void main() {
    System.out.println("reset");
    Soft_Reset();
    System.out.println("volume");
    setCommand(Volume, 5);
    do {
      talk("Hello world!");
    } while(true);
   }

   public static void talk(String val) {
     Check_Busy();
     txUart.sendByte(Say);
     txUart.sendString(val);
     txUart.sendByte(EOM);
     Wait_OK();
   }
   
   public static void setCommand(int cmd) {
     Check_Busy();
     txUart.sendByte(cmd);
     txUart.sendByte(EOM);
     Wait_OK();
   }

   public static void setCommand(int cmd, int val) {
     Check_Busy();
     txUart.sendByte(cmd);
     txUart.sendByte(val);
     txUart.sendByte(EOM);
     Wait_OK();
   }

   public static void Wait_OK(){
     int ret=0;
     for(int j=0; j<3; j++) {
       if(rxUart.byteAvailable())
        while((ret = rxUart.receiveByte()) != OK);;
       if(ret == OK ) break;
     }
   }

   public static void Check_Busy(){
     CPU.delay(800);
     while(CPU.readPin(SERIAL_CTS_PIN) == true) ;
   }

   public static void Soft_Reset(){
     txUart.sendByte(EOM);
     setCommand(Reset);
   }
}