[英]how to read & write my usb device data using usb4java
I want to read and write sandisk usb data using usb4java lib in java. 我想使用Java中的usb4java lib读写Sandisk USB数据。
i can get usb device list. 我可以获得USB设备列表。
but i don't know how to read my usb data. 但我不知道如何读取我的USB数据。
This is my dump usblist code. 这是我的转储usblist代码。
{
// Create the libusb context
Context context = new Context();
// Initialize the libusb context
int result = LibUsb.init(context);
if (result < 0)
{
throw new LibUsbException("Unable to initialize libusb", result);
}
// Read the USB device list
DeviceList list = new DeviceList();
result = LibUsb.getDeviceList(context, list);
if (result < 0)
{
throw new LibUsbException("Unable to get device list", result);
}
try
{
// Iterate over all devices and list them
for (Device device: list)
{
int address = LibUsb.getDeviceAddress(device);
int busNumber = LibUsb.getBusNumber(device);
DeviceDescriptor descriptor = new DeviceDescriptor();
result = LibUsb.getDeviceDescriptor(device, descriptor);
if (result < 0)
{
throw new LibUsbException(
"Unable to read device descriptor", result);
}
System.out.format(
"Bus %03d, Device %03d: Vendor %04x, Product %04x%n",
busNumber, address, descriptor.idVendor(),
descriptor.idProduct());
}
}
finally
{
// Ensure the allocated device list is freed
LibUsb.freeDeviceList(list, true);
}
// Deinitialize the libusb context
LibUsb.exit(context);
}
And this code print out all usb device. 并且此代码打印出所有USB设备。
But i want to check my sandisk device once. 但是我想检查一下我的sandisk设备。
How to change my code? 如何更改我的代码?
think u have to sniff OS requests during writing and reading data using kernel usb driver. 认为您在使用内核USB驱动程序写入和读取数据时必须嗅探OS请求。 and after that u should to send the same requests to your device.
之后,您应该将相同的请求发送到您的设备。
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