HID device with multiple interfaces

Posted on May 17, 2011 at 13:27

Hi,

I am working with the demo board STM32F10X-128K-EVAL. I am making the HID device with multiple intefaces (based on the Custom HID project for the demo board).

I changed the usb_desc.c by adding one more interface and also, set up the endpoint 2 ENDP2 for the second interface.

When I run the code, only the first interface is enumerated successfully.

I dont know what is the problem?

Could somebody help?

Thanks.

Posted on May 17, 2011 at 13:27

Thank you for your replying.

I added one more interface and report descriptor in usb_desc.c.

Also, I changed the CustomHID_Data_Setup function like this:

RESULT CustomHID_Data_Setup(u8 RequestNo)

{

u8 *(*CopyRoutine)(u16);

CopyRoutine = NULL;

if ((RequestNo == GET_DESCRIPTOR)

&& (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT)) )

{

if (pInformation->USBwValue1 == REPORT_DESCRIPTOR)

{

if( pInformation->USBwIndex0 == 0 )

{

CopyRoutine = CustomHID_GetReportDescriptor;

}else if( pInformation->USBwIndex0 == 1 )

{

CopyRoutine = RFID_GetReportDescriptor;

}

}

}

if (CopyRoutine == NULL)

{

return USB_UNSUPPORT;

}

pInformation->Ctrl_Info.CopyData = CopyRoutine;

pInformation->Ctrl_Info.Usb_wOffset = 0;

(*CopyRoutine)(0);

return USB_SUCCESS;

}

With my code now, the device appears as 2 HID devices with 2 interfaces in PC like this:

-HID device

-HID device

-USB human interface device

-USB human interface device

I attach a figure for this.

Did you experience this problem?

Posted on May 17, 2011 at 13:27

Have you changed the decriptors to indicate a composite device?

Chris.