建立Android和ATmega16的微控制器之间的串行通信经由PL2303 USB-UART我们的当前设置的

Z时代
2024-01-10
分类：问答

成分包括：建立Android和ATmega16的微控制器之间的串行通信经由PL2303 USB-UART我们的当前设置的

1）一种硬件设备读取卡和每一个卡被处理时发送的唯一码。包括RFID读卡器，ATMega16微控制器和PL2303 USB-UART，用于与Android设备进行串行通信。

2）每当卡被硬件设备处理时接收唯一代码（由微控制器发送）的Android应用程序。

，我们使用接收来自硬件的唯一代码的代码：

代码使用Android USB Host API

package com.example.admin.hardware; 
    import android.content.Context; 
    import android.content.Intent; 
    import android.hardware.usb.UsbDevice; 
    import android.hardware.usb.UsbDeviceConnection; 
    import android.hardware.usb.UsbEndpoint; 
    import android.hardware.usb.UsbInterface; 
    import android.hardware.usb.UsbManager; 
    import android.support.v7.app.ActionBarActivity; 
    import android.os.Bundle; 
    import android.view.Menu; 
    import android.view.MenuItem; 
    import android.widget.TextView; 
    import android.widget.Toast; 
    public class MainActivity extends ActionBarActivity { 
    UsbManager manager; 
    byte[] bytes; 
    UsbEndpoint end; 
    UsbInterface inter; 
    UsbDevice device; 
    UsbDeviceConnection conn; 
    TextView data; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Intent intent = getIntent(); 
    device = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); 
    if(device == null) 
    { 
     Toast.makeText(this, "NO DEVICE CONNECTED!", Toast.LENGTH_LONG).show(); 
    } 
    else 
    { 
     data = (TextView) findViewById(R.id.data); 
     String name = device.getDeviceName(); 
     //int vendorID = device.getVendorId(); 
     inter = device.getInterface(0); 
     int i = inter.getEndpointCount(); 
     end = inter.getEndpoint(0); 
     Toast.makeText(this, "Name Of The "+name, Toast.LENGTH_LONG).show(); 
     //RETURNS 128 if USB_DIR_IN and 0 if USB_DIR_OUT 
     int direction = end.getDirection(); 
     Toast.makeText(this, "Direction of The EndPoint "+String.valueOf(direction), Toast.LENGTH_LONG).show(); 
      manager = (UsbManager) getSystemService(Context.USB_SERVICE); 
      conn = manager.openDevice(device); 
      conn.claimInterface(inter, true); 
      new Thread(new Runnable(){ 
       @Override 
       public void run() { 
        try { 
         conn.bulkTransfer(end, bytes, 32, 0); 
        } 
        catch(Exception e){ 
         data.setText(e.getMessage()); 
        } 
       } 
      }).start(); 
    } 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 
@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 
    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 
    return super.onOptionsItemSelected(item); 
} 
    }