Recent Posts

1

USB / Re: Usb communication

« Last post by Jan Axelson on October 17, 2019, 11:47:51 am »

Kind of a shot in the dark, but you could try this and see if it makes a difference:

https://www.itechtics.com/run-programs-administrator/

2

USB / Re: USB VCOM host

« Last post by ADB on October 17, 2019, 02:46:05 am »

Thanks Jan.

Regards,

Alan

3

USB / Re: Usb communication

« Last post by djsepddl on October 17, 2019, 12:52:02 am »

i'm using Windows10 and vs2019

4

USB / Re: USB VCOM host

« Last post by Jan Axelson on October 16, 2019, 10:32:07 pm »

The host is the source of bus power.

5

USB / Re: Usb communication

« Last post by Jan Axelson on October 16, 2019, 10:29:01 pm »

I don't have experience with libusbdotnet so not sure if I can help much.

http://libusb.sourceforge.net/api-1.0/group__dev.html#ga32fabedf5f13fdecf1cb33acdb19b57a

What OS?

6

USB / Usb communication

« Last post by djsepddl on October 16, 2019, 09:25:40 pm »

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)'

Code: [Select]

    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.

7

USB / Re: USB VCOM host

« Last post by ADB on October 16, 2019, 11:39:14 am »

Hi Jan,

My microcontroller datasheet/manual doesn't provide much information...

In your "Mass storage" book, it says "The host provides power to all devices on power-up or attachment and works with the devices to conserve power when possible."

Does this mean that the host can't be "bus powered" and rely on the power from a "self powered" slave device?

Thanks again,

Alan

8

USB / Re: USB VCOM host

« Last post by Jan Axelson on October 14, 2019, 11:52:32 am »

Consult the host device's data sheet to make sure the host device is configured as OTG.

9

USB / Re: USB VCOM host

« Last post by ADB on October 14, 2019, 11:16:42 am »

Hi Jan,

Thank you for getting back to me.

The following website summarises the host ennumeration process: https://microchipdeveloper.com/usb:enumeration
I am still at step 1. As far as I'm aware the Vbus voltage is 5V on both the host and device. There is nothing appearing on my protocol analyser yet...

Regards,

Alan

10

USB / Re: USB VCOM host

« Last post by Jan Axelson on October 12, 2019, 08:54:55 pm »

OTG requires at least one device that can function as a host. If the other device is device-function-only, the host device will be the "A" device and must take the host function.

USB ports on PCs, with series-A connectors, are always host functions.

For debugging, a hardware-based protocol analyzer can offer clues. Also refer to the data sheet for your device for device-specific information, plus any example code from the chip provider.