연결 관리

PeripheralManagerService manager = new PeripheralManagerService();
List<String> portList = manager.getPwmList();
if (portList.isEmpty()) {
    Log.i(TAG, "No PWM port available on this device.");
} else {
    Log.i(TAG, "List of available ports: " + portList);
}

public class HomeActivity extends Activity {
    // PWM Name
    private static final String PWM_NAME = ...;

    private Pwm mPwm;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Attempt to access the PWM port
        try {
            mPwm = mPeripheralManager.openPwm(PWM_NAME);
        } catch (IOException e) {
            Log.w(TAG, "Unable to access PWM", e);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        if (mPwm != null) {
            try {
                mPwm.close();
                mPwm = null;
            } catch (IOException e) {
                Log.w(TAG, "Unable to close PWM", e);
            }
        }
    }
}

펄스 폭 변조 (PWM) 설정 및 제어

public void initializePwm(Pwm pwm) throws IOException {
    pwm.setPwmFrequencyHz(120);
    pwm.setPwmDutyCycle(25);

    // Enable the PWM signal
    pwm.setEnabled(true);
}