DFRobot DFR0004 Manual - Page 9

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DFRobot DFR0004 Manual
      case 'a'://Turn Left
        turn_L (100,100);
        break;       
      case 'd'://Turn Right
        turn_R (100,100);
        break;
      case 'z':
        Serial.println("Hello");
        break;
      case 'x':
        stop();
        break;
      }
    }
    else stop();  
  }
}
PLL Control Mode
The Romeo also supports PLLPhase locked loop (/wiki/index.php/Phase_locked_loop) control
mode.
Sample Code：
(/wiki/index.php/File:Romeov11xxx.png)
Fig5: PLL Motor
Control Pin
Allocation
Configuration