Arduino Android USB 连接 [英] Arduino Android USB connection

问题描述

我正在使用 Arduino Duemilanove 和 Nexus 7.我已成功检测到 Arduino 板并显示了供应商 ID 和产品 ID.我正在尝试将数据从平板电脑传输到 Arduino 板并尝试使 LED 闪烁在板上.Android的代码如下.

I am using an Arduino Duemilanove and Nexus 7. I have successfully detected the Arduino board and displayed the vendor id and product id. I am trying to transfer data from my tablet to the Arduino board and trying to blink the LED on the board. The code for Android is as follows.

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
        UsbDeviceConnection connection;
        HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
        Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
        UsbDevice device = null;
        while(deviceIterator.hasNext()){
            device = deviceIterator.next();
            String s = device.getDeviceName();
            int pid = device.getProductId();
            int did = device.getDeviceId();
            int vid = device.getVendorId();
            TextView tv = (TextView) findViewById(R.id.textview);
            tv.setText(s+"\n"+Integer.toString(pid)+"\n"+Integer.toString(did));
        }
        connection = manager.openDevice(device);
        DataTransfer dt = new DataTransfer(device,connection);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

DataTrasfer.java

public class DataTransfer extends Thread {
    UsbDevice device;
    UsbDeviceConnection connection;
    byte data = 1;
    public DataTransfer(UsbDevice device, UsbDeviceConnection connection) {
        // TODO: Auto-generated constructor stub
        device = this.device;
        connection = this.connection;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        super.run();
        UsbInterface usbIf = device.getInterface(0);
        UsbEndpoint end1 = usbIf.getEndpoint(0);

        //UsbRequest ureq = connection.requestWait();
        final Object[] sSendLock = new Object[]{};
        boolean mStop = false;
        byte mData = 0x00;

        if(!connection.claimInterface(usbIf, true))
        {
            return;
        }

        connection.controlTransfer(0x21, 34, 0, 0, null, 0, 0);
        connection.controlTransfer(0x21, 32, 0, 0, new byte[] { (byte) 0x80,
                0x25, 0x00, 0x00, 0x00, 0x00, 0x08 }, 7, 0);
        connection.controlTransfer(0x40, 0x03, 0x4138, 0, null, 0, 0); //Baudrate 9600

        UsbEndpoint epIN = null;
        UsbEndpoint epOUT = null;

        for (int i = 0; i < usbIf.getEndpointCount(); i++) {
            if (usbIf.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
                if (usbIf.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN)
                    epIN = usbIf.getEndpoint(i);
                else
                    epOUT = usbIf.getEndpoint(i);
            }
        }

        for (;;) { // This is the main loop for transferring
            synchronized (sSendLock) { //OK, there should be a OUT queue, no guarantee that the byte is sent actually.
                try {
                    sSendLock.wait();
                }
                catch (InterruptedException e) {
                    if (mStop) {
                        return;
                    }
                    e.printStackTrace();
                }
                connection.bulkTransfer(epOUT,new byte[] {data}, 1, 0);
            }
        }
    }
}

我的 Arduino 代码是:

And my Arduino code is:

int incomingByte = 0; // For incoming serial data
void setup() {
    pinMode(13, OUTPUT);
    Serial.begin(9600); // Opens serial port, sets data rate to 9600 bps.
}

void loop() {
    // Send data only when you receive data:
    if (Serial.available() > 0) {
        // Read the incoming byte:
        incomingByte = Serial.read();
        digitalWrite(13, HIGH);   // Set the LED on
        delay(1000);              // Wait for a second
        digitalWrite(13, LOW);    // Set the LED off

        // Say what you got:
        Serial.print("I received: ");
        Serial.println(incomingByte, DEC);
    }
}

问题是 Arduino 板上没有 LED 发光.我不知道问题出在哪里，因为我刚刚开始在这个领域工作.

The problem is that there is no LED glowing on the Arduino board. I am not sure where the problem lies as I have just started working in this area.

推荐答案

您从 http 引用的项目://android.serverbox.ch/?p=549 评论中只适用于更新的 Arduino 板，例如 Uno(或其他使用 CDC-ACM 串行 USB 方案的东西，他们实施).

The project you reference from http://android.serverbox.ch/?p=549 in comments will only work with the more recent Arduino boards such as the Uno (or with something else which uses the CDC-ACM serial-over-USB scheme which they implement).

较旧的 Arduino 板(例如您的 Duemilanove)使用 FTDI USB 串行芯片，这需要不同的 USB 操作.

The older Arduino boards such as your duemilanove use an FTDI USB-serial chip, which would require different USB operations.

您可以在某处找到有关将 FT232 系列 USB 串行转换器与 Android 的 USB 主机 api 连接的内容(FTDI 部件广泛用于嵌入式系统，因此您肯定会找到一些东西)，或者您可以使用 Uno 板来尝试您已有的代码.

You may be able to find something somewhere about interfacing the FT232 family of USB-serial converters with Android's USB host api (the FTDI parts are widely used in embedded systems, so it's not out of the question you'll find something), or you can get an Uno board to try the code you already have.

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