hi Jan,
I am developing a tool with c# in the company.
We need to implement usb communication and are trying using the LibUsbDotNet library.
But we succeeded in recognizing usb, but we can't read/write.
I attach my source and log. What the hell is ClaimInterface?
Thanks in advance for your comments,
Regards,
Lee,
selectedDevice.ClaimInterface(selectedDevice.Configs[0].Interfaces[0].Number);
This error occurs in that statement.
LibUsbDotNet.LibUsb.UsbException: 'Access denied (insufficient permissions)'
internal class ReadWrite
{
//Put your Product Id Here
private const int ProductId = 0x572A;
//Put your Vendor Id Here
private const int VendorId = 0x0483;
public static void Main(string[] args)
{
using (var context = new UsbContext())
{
//context.SetDebugLevel(LogLevel.Info);
context.SetDebugLevel(LogLevel.Debug);
//Get a list of all connected devices
var usbDeviceCollection = context.List();
//Narrow down the device by vendor and pid
var selectedDevice = usbDeviceCollection.FirstOrDefault(d => d.ProductId == ProductId && d.VendorId == VendorId);
//Open the device
selectedDevice.Open();
//Get the first config number of the interface
selectedDevice.ClaimInterface(selectedDevice.Configs[0].Interfaces[0].Number);
//Open up the endpoints
var writeEndpoint = selectedDevice.OpenEndpointWriter(WriteEndpointID.Ep01);
var readEnpoint = selectedDevice.OpenEndpointReader(ReadEndpointID.Ep01);
//Create a buffer with some data in it
var buffer = new byte[512];
buffer[0] = 0x20;
buffer[1] = 0x01;
buffer[2] = 0xAA;
buffer[3] = 0x00;
buffer[4] = 0x03;
buffer[5] = 0x00;
buffer[6] = 0x04;
buffer[7] = 0x64;
//Write three bytes
writeEndpoint.Write(buffer, 3000, out var bytesWritten);
var readBuffer = new byte[512];
//Read some data
var ret = readEnpoint.Read(readBuffer, 3000, out var readBytes);
Console.WriteLine("{0}", ret.ToString());
}
}
}
debugging log
[27.666000] [0000325c] libusb: error [auto_claim] could not auto-claim any interface
[27.666999] [0000325c] libusb: debug [usbi_remove_pollfd] remove fd 2
[27.666999] [0000325c] libusb: debug [libusb_free_transfer] transfer 0000028EFDA23508
[27.666999] [0000325c] libusb: debug [libusb_alloc_transfer] transfer 0000028EFDA23508
[27.668996] [0000325c] libusb: debug [libusb_submit_transfer] transfer 0000028EFDA23508
[27.669990] [0000325c] libusb: debug [usbi_add_pollfd] add fd 2 events 1
[27.669990] [0000325c] libusb: debug [libusb_claim_interface] interface 0
[27.670988] [0000325c] libusb: error [winusbx_claim_interface] could not access interface 0: [50] 지원되지 않는 요청입니다.
[27.671985] [0000325c] libusb: debug [libusb_claim_interface] interface 1
[27.671985] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 1 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.671985] [0000325c] libusb: debug [libusb_claim_interface] interface 2
[27.672983] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 2 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.672983] [0000325c] libusb: debug [libusb_claim_interface] interface 3
[27.672983] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 3 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.673980] [0000325c] libusb: debug [libusb_claim_interface] interface 4
[27.673980] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 4 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.673980] [0000325c] libusb: debug [libusb_claim_interface] interface 5
[27.674978] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 5 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.674978] [0000325c] libusb: debug [libusb_claim_interface] interface 6
[27.674978] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 6 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.675975] [0000325c] libusb: debug [libusb_claim_interface] interface 7
[27.675975] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 7 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.675975] [0000325c] libusb: debug [libusb_claim_interface] interface 8
[27.676972] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 8 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.678967] [0000325c] libusb: debug [libusb_claim_interface] interface 9
[27.679964] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 9 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.679964] [0000325c] libusb: debug [libusb_claim_interface] interface 10
[27.680961] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 10 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.680961] [0000325c] libusb: debug [libusb_claim_interface] interface 11
[27.681958] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 11 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.681958] [0000325c] libusb: debug [libusb_claim_interface] interface 12
[27.682956] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 12 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.682956] [0000325c] libusb: debug [libusb_claim_interface] interface 13
[27.683953] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 13 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.683953] [0000325c] libusb: debug [libusb_claim_interface] interface 14
[27.684951] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 14 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.684951] [0000325c] libusb: debug [libusb_claim_interface] interface 15
[27.685947] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 15 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.685947] [0000325c] libusb: debug [libusb_claim_interface] interface 16
[27.686945] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 16 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.686945] [0000325c] libusb: debug [libusb_claim_interface] interface 17
[27.689937] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 17 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.689937] [0000325c] libusb: debug [libusb_claim_interface] interface 18
[27.690944] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 18 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.690944] [0000325c] libusb: debug [libusb_claim_interface] interface 19
[27.691932] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 19 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.691932] [0000325c] libusb: debug [libusb_claim_interface] interface 20
[27.692929] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 20 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.692929] [0000325c] libusb: debug [libusb_claim_interface] interface 21
[27.693926] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 21 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.693926] [0000325c] libusb: debug [libusb_claim_interface] interface 22
[27.694923] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 22 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.694923] [0000325c] libusb: debug [libusb_claim_interface] interface 23
[27.694923] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 23 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.695920] [0000325c] libusb: debug [libusb_claim_interface] interface 24
[27.695920] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 24 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.696918] [0000325c] libusb: debug [libusb_claim_interface] interface 25
[27.696918] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 25 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.697915] [0000325c] libusb: debug [libusb_claim_interface] interface 26
[27.697915] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 26 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.699910] [0000325c] libusb: debug [libusb_claim_interface] interface 27
[27.699910] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 27 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.700913] [0000325c] libusb: debug [libusb_claim_interface] interface 28
[27.700913] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 28 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.701905] [0000325c] libusb: debug [libusb_claim_interface] interface 29
[27.701905] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 29 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.701905] [0000325c] libusb: debug [libusb_claim_interface] interface 30
[27.702902] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 30 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.703900] [0000325c] libusb: debug [libusb_claim_interface] interface 31
[27.703900] [0000325c] libusb: warning [winusbx_claim_interface] failed to auto-claim interface 0 (required to claim 31 with WinUSB): [50] 지원되지 않는 요청입니다.
[27.704897] [0000325c] libusb: error [auto_claim] could not auto-claim any interface
[27.704897] [0000325c] libusb: debug [usbi_remove_pollfd] remove fd 2
[27.705894] [0000325c] libusb: debug [libusb_free_transfer] transfer 0000028EFDA23508
[27.707889] [0000325c] libusb: debug [libusb_claim_interface] interface 0
[27.707889] [0000325c] libusb: error [winusbx_claim_interface] could not access interface 0: [50] 지원되지 않는 요청입니다.
