CreateFile failure

[briancg]

Hello,
I am trying to use hidtest in VC++ 2010 express to communicate with an Atmel dev kit - set up as a USB HID device.

The first call to CreateFile fails (from hid_open from hid_enumerate).

Any suggestions as to what I am missing ?

Thanks
Brian

[signal11]

Did you modify the hidtest to try to open your device VID and PID? Did you try with the testgui?

[briancg]

Thanks for the quick response.
Yes - handle = hid_open(0x3eb, 0x2304, NULL);
Testgui does not recognise any devices ! - not even 3 mice I tried ! - or this dev kit
Just before the open_device call, device_interface_detail_data shows this content :
device_interface_detail_data->DevicePath 0x0017363c "?\hid#vid_03eb&pid_2304#7&34b7ee55&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}"
Then open device returns with write_handle = 0xffffffff
It appears that the correct device has been found ?

Thanks
Brian

DevicePath = 0x00ef363c "?\hid#vid_15d9&pid_0a4d#7&231f775c&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}"
The vid & pid refer to a mouse.

[briancg]

please ignore last 2 lines above !

[signal11]

Windows won't show keyboards and mice. You'd need something like a custom HID device or a joystick.

Download USBView and see if your device is showing up at all.
I can't find a download link on Microsoft's website, so get it from FTDI:
http://www.ftdichip.com/Support/Utilities.htm

[briancg]

Thanks - it does show - details as below. I did try to change it away from a mouse to avoid the windows issue...

Device Descriptor:
bcdUSB: 0x0200
bDeviceClass: 0x00
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x40 (64)
idVendor: 0x03EB (Atmel Corporation)
idProduct: 0x2304
bcdDevice: 0x1000
iManufacturer: 0x01
0x0409: "ATMEL"
iProduct: 0x02
0x0409: "AVR32 UC3 HID"
iSerialNumber: 0x03
0x0409: "1.0.0.0.0.0.A"
bNumConfigurations: 0x01

ConnectionStatus: DeviceConnected
Current Config Value: 0x01
Device Bus Speed: Full
Device Address: 0x02
Open Pipes: 1

Endpoint Descriptor:
bEndpointAddress: 0x81 IN
Transfer Type: Interrupt
wMaxPacketSize: 0x0008 (8)
bInterval: 0x05

Configuration Descriptor:
wTotalLength: 0x0022
bNumInterfaces: 0x01
bConfigurationValue: 0x01
iConfiguration: 0x00
bmAttributes: 0xC0 (Bus Powered Self Powered )
MaxPower: 0x32 (100 Ma)

Interface Descriptor:
bInterfaceNumber: 0x00
bAlternateSetting: 0x00
bNumEndpoints: 0x01
bInterfaceClass: 0x03 (HID)
bInterfaceSubClass: 0x00
bInterfaceProtocol: 0x02
iInterface: 0x00

HID Descriptor:
bcdHID: 0x0111
bCountryCode: 0x00
bNumDescriptors: 0x01
bDescriptorType: 0x22
wDescriptorLength: 0x0034

Endpoint Descriptor:
bEndpointAddress: 0x81 IN
Transfer Type: Interrupt
wMaxPacketSize: 0x0008 (8)
bInterval: 0x05

[signal11]

It still says mouse: bInterfaceProtocol: 0x02

See the HID specification for more details:
http://www.usb.org/developers/hidpage/

[signal11]

Does Atmel provide a custom HID device demo? Picking at descriptors is error-prone when you're new to USB.

[briancg]

Thanks ! I was wondering if I'd missed something. Atmel's windows demo is Java based, and out of date - so does not work.
Thanks for the guidance - will advise on progress.