Question

我有以下组件。

设备：

Arduino Uno R3（原创）
USB Host Shield（来自sparkfun.com）
ASUS Zenfone 2（Android 5.0版）

软件：

Arduino IDE（1.6.5）
USB Host Shield（图书馆2.0）
Android Studio（1.3.2）

我要做的是：

我正在尝试使用我的Arduino连接Android手机进行简单的数据通信。

我的问题：

我不明白什么是错的！我的ADK（来自图书馆）无法通过Arduino USB屏蔽识别我的Android手机。我一直在浪费几个星期:(。请帮帮我。

这是我的代码：

Arduino Sketch：

#include <adk.h>
// Satisfy IDE, which only needs to see the include statement in the Uno.
#ifdef dobogusinclude
#include <spi4teensy3.h>
#include <SPI.h>
#endif

USB Usb;
ADK adk(&Usb, "DemoTestKit", // Manufacturer Name
  "DemoKit", // Model Name
  "Example sketch for the USB Host Shield",
  "1.0", // Version
  "http://www.example.com", // URL (web page to visit if no installed apps support the accessory)
  "123456789"); // Serial Number (optional)
uint32_t timer;
bool connected;

void setup() {
  Serial.begin(115200);
  #if !defined(__MIPSEL__)
    while (!Serial);
    // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
  #endif
  if (Usb.Init() == -1) {
    Serial.print("\r\nOSCOKIRQ failed to assert");
    while (1); // halt
  }
  Serial.print("\r\nArduino Started");
}

void loop() {
  Usb.Task();
  if (adk.isReady()) {
    Serial.print("\r\nADK Ready");
    if (!connected) {
      connected = true;
      Serial.print(F("\r\nConnected to accessory"));
    }
  } else {
    if (connected) {
      connected = false;
      Serial.print(F("\r\nDisconnected from accessory"));
    }
  }
}

此处adk.isReady()无效。

Android代码：-----------

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.softpider.usb.usbtest" >
  <uses-feature android:name="android.hardware.usb.accessory" />
  <application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
      android:name=".MainActivity"
      android:label="@string/app_name" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      <intent-filter>
        <action android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED" />
      </intent-filter>
      <meta-data android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"
        android:resource="@xml/accessory_filter" />
    </activity>
  </application>
</manifest>

accessory_filter.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <usb-accessory model="DemoKit" manufacturer="DemoTestKit" version="1.0"/>
</resources>

MainActivity.java

public class MainActivity extends AppCompatActivity {
  public static final boolean D = BuildConfig.DEBUG;
  // This is automatically set when building
  private static final String TAG = "ArduinoBlinkLEDActivity";
  // TAG is used to debug in Android logcat console
  private static final String ACTION_USB_PERMISSION = "com.softpider.usb.usbtest";
  UsbAccessory mAccessory;
  ParcelFileDescriptor mFileDescriptor;
  FileInputStream mInputStream;
  FileOutputStream mOutputStream;
  private UsbManager mUsbManager;
  private PendingIntent mPermissionIntent;
  private boolean mPermissionRequestPending;
  TextView connectionStatus;
  private TextView textView;
  UsbAccessory accessory;
  private UsbDevice device;

  private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
      String action = intent.getAction();
      if (ACTION_USB_PERMISSION.equals(action)) {
        synchronized (this) {
          accessory = (UsbAccessory) intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
          if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
            if(accessory != null) {
              openAccessory(accessory);
            }
          } else {
            Log.d(TAG, "permission denied for accessory " + accessory);
          }
          mPermissionRequestPending = false;
        }
      }
      if (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
        accessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
        if (accessory != null) {
          closeAccessory();
        }
      }
    }
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    connectionStatus = (TextView) findViewById(R.id.connectionStatus);
    textView = (TextView) findViewById(R.id.textView);
    textView.setText("OnCreate");
    mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
    IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
    registerReceiver(mUsbReceiver, filter);
  }
  @Override
  public void onResume() {
    super.onResume();
    // textView.setText("OnResume");
    if (mAccessory != null) {
      setConnectionStatus(true);
      return;
    }
    // Log.i(TAG, "Device List: " + deviceList);
    mUsbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
    UsbAccessory[] accessories = mUsbManager.getAccessoryList();
    // textView.setText(Arrays.toString(accessories));
    HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList();
    device = deviceList.get("<deviceName>");
    Log.i(TAG, "Accessories List: " + accessories);
    if (accessories != null) {
      if (mUsbManager.hasPermission(accessory)) {
        openAccessory(accessory);
        textView.setText("OnResume IF False");
      } else {
        setConnectionStatus(false);
        textView.setText("OnResume IF Else False");
        synchronized (mUsbReceiver) {
          if (!mPermissionRequestPending) {
            mUsbManager.requestPermission(device, mPermissionIntent);
            mPermissionRequestPending = true;
          }
        }
      }
    } else {
      setConnectionStatus(false);
      // textView.setText("OnResume Else False");
      if (D)
        Log.d(TAG, "mAccessory is null");
    }
  }
  private void openAccessory(UsbAccessory accessory) {
    textView.setText("Accessory Open");
  }
  private void setConnectionStatus(boolean connected) {
    connectionStatus.setText(connected ? "Connected" : "Disconnected");
  }
  private void closeAccessory() {
    setConnectionStatus(false);
    textView.setText("Accessory Close");
  }
}

我无法理解ACTION_USB_PERMISSION字符串是什么？

private static final String ACTION_USB_PERMISSION = "com.softpider.usb.usbtest";

或

private static final String ACTION_USB_PERMISSION = "com.softpider.usb.usbtest.USB_PERMISSION";

或

private static final String ACTION_USB_PERMISSION = "com.softpider.usb.USB_PERMISSION";

Answer 1

一个古老的问题，但是我现在正在做类似的事情。因此，我相信您的问题是您没有调用init()方法来初始化ADK。

#include <adk.h>

...

int main(void) {
    init();
    setup();
    for (;;) {
        loop();
    }
}

与Arduino和USB主机屏蔽的Android USB附件连接

1 个答案: