Question

我正在尝试编写Android Activity来执行Arduino Duemilanove的读取数据。该Arduino型号具有FTDI 232RL芯片。我研究了以下网站和答案：

setting parity with controlTransfer method
http://developer.android.com/reference/android/hardware/usb/UsbDeviceConnection.html
http://read.pudn.com/downloads181/sourcecode/embed/842049/usb/serial/ftdi_sio.h__.htm 等等...

我的代码可以在Android USB设备上执行controlTransfer操作。但是，在bulkTransfer上，返回的数据只有1 96 0 ...... 我已经修改了波特率：Arduino串口运行在57600上，而controlTransfer运行到。请关注我的代码：

        if(device != null){            
        UsbDeviceConnection conn = usbManager.openDevice(device);
        if (!conn.claimInterface(device.getInterface(0), true)) {
            return;
        }
        //configuring the usb device: https://stackoverflow.com/questions/8546099/setting-parity-with-controltransfer-method
        if(conn.controlTransfer(0x40, 0, 0, 0, null, 0, 0) < 0){//reset
            Toast.makeText(getApplicationContext(), "Reset Fail", Toast.LENGTH_LONG).show();
        }
        if(conn.controlTransfer(0x40, 0, 0x01, 0, null, 0, 0) < 0){//clear Rx
            Toast.makeText(getApplicationContext(), "Clean RX Fail", Toast.LENGTH_LONG).show();
        }
        if(conn.controlTransfer(0x40, 0, 0x02, 0, null, 0, 0) < 0){//clear Tx
            Toast.makeText(getApplicationContext(), "Clean TX Fail", Toast.LENGTH_LONG).show();
        }
        if(conn.controlTransfer(0x40, 0x02, 0x0000, 0, null, 0, 0) < 0 ){ //flow control none            
            Toast.makeText(getApplicationContext(), "Flow Control fail", Toast.LENGTH_LONG).show();
        }
        if(conn.controlTransfer(0x40, 0x03, 0x0034, 0, null, 0, 0) < 0){//baudrate 57600
            Toast.makeText(getApplicationContext(), "Baudrate fail", Toast.LENGTH_LONG).show();
        }
        if(conn.controlTransfer(0x40, 0x04, 0x0008, 0, null, 0, 0) < 0){ //data bit 8 parity none stop bit 1
            Toast.makeText(getApplicationContext(), "settings fail", Toast.LENGTH_LONG).show();
        }            

        Toast.makeText(getApplicationContext(), "Reading data...", Toast.LENGTH_LONG).show();            
        byte[] data = new byte[4096];
        if(conn.bulkTransfer(epIN, data, 4096, 5000) >= 0){
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < 8; i++) {
                builder.append(data[i]);
            }                        
            Toast.makeText(getApplicationContext(), "Data: "+builder, Toast.LENGTH_LONG).show();            
            dispositivos.setText(builder);
        }            

        /*
        try{
            Thread.sleep(5000);                     
        }
        catch(InterruptedException e){
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "Error: "+e.getMessage(), Toast.LENGTH_LONG).show();
        }*/
    }

有人有什么想法或建议吗？

坦克寻求帮助。

Answer 1

我找到了一个帮助我与Arduino Duemilanove进行Android通信的库。这个arduino模型有一个FTDI芯片（232R）。该芯片是USB UART接口。然后，我正在使用这个lib：

https://github.com/mik3y/usb-serial-for-android

它帮助我以简单的方式在Android和Arduino之间进行通信，只需几行代码。

感谢。

Android USB读取Arduino返回19600

1 个答案: