what is USB Device name?
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From: Uwe Sieber on 14 Dec 2006 12:31 shiva wrote: > hi Sten, > I am sure about the data i am asking for :)... > > I am using DeviceIoControl() function after createfile().\ > i am querying for USB_DEVICE_DESCRPTOR but always deviceIoControl > giving me "Invalid function" as error. And the IOCTL code you are using is still a big secret? I suspect you have used IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION as shown in the USBview sample I had pointed you on before. And which you havn't said thanks for btw, which would be good idea to keep the helpers happy. What you are obviously doing is trial and error programming. The USBview sample uses a handle to an USB HUB device. A different type of handle will not work. Uwe
From: shiva on 15 Dec 2006 00:09 This is my code snippet, here my DeviceIoControl throwing me "Invalid Function" error. g_szDevicePath value is \\?\USB#Vid_413c&Pid_4011#0e01312e-0507-1116-2800-0050bfe45ce5#{a5dcbf10-6530-11d2-901f-00c04fb951ed} i already posted, how i am getting this value. I am getting handle properly, but DeviceIoControl is failing.. Am i wrong with IOCTL_ Control word, or any mistake in UsbscanGetDescriptor values? Is there mistake in my approach it self..... pls lemme know! ShowErrorMessage() is own function which display the corresponding error message for value returned by GetLastError(); I feel, i given sufficient info, can we solve this. USBSCAN_GET_DESCRIPTOR UsbscanGetDescriptor = { 0 }; USB_DEVICE_DESCRIPTOR UsbDeviceDescriptor = { 0 }; HANDLE hUsbDevice = CreateFile ( g_szDevPath,\ GENERIC_READ | GENERIC_WRITE,\ 0,\ NULL,\ OPEN_EXISTING,\ 0,\ NULL ); if ( INVALID_HANDLE_VALUE == hUsbDevice ) { dwError = GetLastError (); ShowErrorMessage ( NULL, &dwError ); MessageBox ( NULL, "Not able to create handle to USB device", "Sorry", MB_OK ); break; } dwSize = sizeof ( UsbDeviceDescriptor ); UsbscanGetDescriptor.DescriptorType = USB_DEVICE_DESCRIPTOR_TYPE; UsbscanGetDescriptor.Index = 1; UsbscanGetDescriptor.LanguageId = 0; dwError = ( DWORD ) DeviceIoControl ( hUsbDevice, \ IOCTL_GET_USB_DESCRIPTOR , \ &UsbscanGetDescriptor, \ sizeof ( UsbscanGetDescriptor ), \ &UsbDeviceDescriptor, \ dwSize, \ &dwInDataSize, \ NULL ); if ( 0 == dwError ) { dwError = GetLastError ( ); ShowErrorMessage ( NULL, &dwError ); break; } Uwe Sieber wrote: > shiva wrote: > > hi Sten, > > I am sure about the data i am asking for :)... > > > > I am using DeviceIoControl() function after createfile().\ > > i am querying for USB_DEVICE_DESCRPTOR but always deviceIoControl > > giving me "Invalid function" as error. > > And the IOCTL code you are using is still a big secret? > > I suspect you have used IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION > as shown in the USBview sample I had pointed you on before. And which > you havn't said thanks for btw, which would be good idea to keep the > helpers happy. > > What you are obviously doing is trial and error programming. > > The USBview sample uses a handle to an USB HUB device. A different > type of handle will not work. > > > Uwe
From: Uwe Sieber on 15 Dec 2006 03:13 IOCTL_GET_USB_DESCRIPTOR is documented to work with still image devices. Is your device of this type? Uwe shiva wrote: > This is my code snippet, here my DeviceIoControl throwing me "Invalid > Function" error. > > g_szDevicePath value is > \\?\USB#Vid_413c&Pid_4011#0e01312e-0507-1116-2800-0050bfe45ce5#{a5dcbf10-6530-11d2-901f-00c04fb951ed} > i already posted, how i am getting this value. > > I am getting handle properly, but DeviceIoControl is failing.. > Am i wrong with IOCTL_ Control word, or any mistake in > UsbscanGetDescriptor values? > > Is there mistake in my approach it self..... pls lemme know! > > ShowErrorMessage() is own function which display the corresponding > error message for value returned by GetLastError(); > > I feel, i given sufficient info, can we solve this. > > USBSCAN_GET_DESCRIPTOR UsbscanGetDescriptor = { 0 }; > USB_DEVICE_DESCRIPTOR UsbDeviceDescriptor = { 0 }; > > HANDLE hUsbDevice = CreateFile ( g_szDevPath,\ > GENERIC_READ | GENERIC_WRITE,\ > 0,\ > NULL,\ > OPEN_EXISTING,\ > 0,\ > NULL ); > > if ( INVALID_HANDLE_VALUE == hUsbDevice ) > { > dwError = GetLastError (); > ShowErrorMessage ( NULL, &dwError ); > MessageBox ( NULL, "Not able to create handle to USB device", "Sorry", > MB_OK ); > break; > } > > > dwSize = sizeof ( UsbDeviceDescriptor ); > UsbscanGetDescriptor.DescriptorType = USB_DEVICE_DESCRIPTOR_TYPE; > UsbscanGetDescriptor.Index = 1; > UsbscanGetDescriptor.LanguageId = 0; > > dwError = ( DWORD ) DeviceIoControl ( hUsbDevice, \ > IOCTL_GET_USB_DESCRIPTOR , \ > &UsbscanGetDescriptor, \ > sizeof ( UsbscanGetDescriptor ), \ > &UsbDeviceDescriptor, \ > dwSize, \ > &dwInDataSize, \ > NULL ); > if ( 0 == dwError ) > { > dwError = GetLastError ( ); > ShowErrorMessage ( NULL, &dwError ); > break; > } > > > Uwe Sieber wrote: >> shiva wrote: >>> hi Sten, >>> I am sure about the data i am asking for :)... >>> >>> I am using DeviceIoControl() function after createfile().\ >>> i am querying for USB_DEVICE_DESCRPTOR but always deviceIoControl >>> giving me "Invalid function" as error. >> And the IOCTL code you are using is still a big secret? >> >> I suspect you have used IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION >> as shown in the USBview sample I had pointed you on before. And which >> you havn't said thanks for btw, which would be good idea to keep the >> helpers happy. >> >> What you are obviously doing is trial and error programming. >> >> The USBview sample uses a handle to an USB HUB device. A different >> type of handle will not work. >> >> >> Uwe >
From: shiva on 15 Dec 2006 05:48 Thanks Uwe, My device is not still image device. So, may i know which IOCTL code word i can use with same HANDLE to retrieve device descriptor. Is it possible like this. Shiva Uwe Sieber wrote: > IOCTL_GET_USB_DESCRIPTOR is documented to work with still > image devices. Is your device of this type? > > Uwe > > > > shiva wrote: > > This is my code snippet, here my DeviceIoControl throwing me "Invalid > > Function" error. > > > > g_szDevicePath value is > > \\?\USB#Vid_413c&Pid_4011#0e01312e-0507-1116-2800-0050bfe45ce5#{a5dcbf10-6530-11d2-901f-00c04fb951ed} > > i already posted, how i am getting this value. > > > > I am getting handle properly, but DeviceIoControl is failing.. > > Am i wrong with IOCTL_ Control word, or any mistake in > > UsbscanGetDescriptor values? > > > > Is there mistake in my approach it self..... pls lemme know! > > > > ShowErrorMessage() is own function which display the corresponding > > error message for value returned by GetLastError(); > > > > I feel, i given sufficient info, can we solve this. > > > > USBSCAN_GET_DESCRIPTOR UsbscanGetDescriptor = { 0 }; > > USB_DEVICE_DESCRIPTOR UsbDeviceDescriptor = { 0 }; > > > > HANDLE hUsbDevice = CreateFile ( g_szDevPath,\ > > GENERIC_READ | GENERIC_WRITE,\ > > 0,\ > > NULL,\ > > OPEN_EXISTING,\ > > 0,\ > > NULL ); > > > > if ( INVALID_HANDLE_VALUE == hUsbDevice ) > > { > > dwError = GetLastError (); > > ShowErrorMessage ( NULL, &dwError ); > > MessageBox ( NULL, "Not able to create handle to USB device", "Sorry", > > MB_OK ); > > break; > > } > > > > > > dwSize = sizeof ( UsbDeviceDescriptor ); > > UsbscanGetDescriptor.DescriptorType = USB_DEVICE_DESCRIPTOR_TYPE; > > UsbscanGetDescriptor.Index = 1; > > UsbscanGetDescriptor.LanguageId = 0; > > > > dwError = ( DWORD ) DeviceIoControl ( hUsbDevice, \ > > IOCTL_GET_USB_DESCRIPTOR , \ > > &UsbscanGetDescriptor, \ > > sizeof ( UsbscanGetDescriptor ), \ > > &UsbDeviceDescriptor, \ > > dwSize, \ > > &dwInDataSize, \ > > NULL ); > > if ( 0 == dwError ) > > { > > dwError = GetLastError ( ); > > ShowErrorMessage ( NULL, &dwError ); > > break; > > } > > > > > > Uwe Sieber wrote: > >> shiva wrote: > >>> hi Sten, > >>> I am sure about the data i am asking for :)... > >>> > >>> I am using DeviceIoControl() function after createfile().\ > >>> i am querying for USB_DEVICE_DESCRPTOR but always deviceIoControl > >>> giving me "Invalid function" as error. > >> And the IOCTL code you are using is still a big secret? > >> > >> I suspect you have used IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION > >> as shown in the USBview sample I had pointed you on before. And which > >> you havn't said thanks for btw, which would be good idea to keep the > >> helpers happy. > >> > >> What you are obviously doing is trial and error programming. > >> > >> The USBview sample uses a handle to an USB HUB device. A different > >> type of handle will not work. > >> > >> > >> Uwe > >
From: Uwe Sieber on 15 Dec 2006 10:07 The only way I know is as shown in the USBview and DisplayUSB samples: Enumerate the whole USB tree until you find your device. Uwe shiva wrote: > Thanks Uwe, > > My device is not still image device. > So, may i know which IOCTL code word i can use with same HANDLE to > retrieve device descriptor. Is it possible like this. > > Shiva > > > > Uwe Sieber wrote: >> IOCTL_GET_USB_DESCRIPTOR is documented to work with still >> image devices. Is your device of this type? >> >> Uwe >> >> >> >> shiva wrote: >>> This is my code snippet, here my DeviceIoControl throwing me "Invalid >>> Function" error. >>> >>> g_szDevicePath value is >>> \\?\USB#Vid_413c&Pid_4011#0e01312e-0507-1116-2800-0050bfe45ce5#{a5dcbf10-6530-11d2-901f-00c04fb951ed} >>> i already posted, how i am getting this value. >>> >>> I am getting handle properly, but DeviceIoControl is failing.. >>> Am i wrong with IOCTL_ Control word, or any mistake in >>> UsbscanGetDescriptor values? >>> >>> Is there mistake in my approach it self..... pls lemme know! >>> >>> ShowErrorMessage() is own function which display the corresponding >>> error message for value returned by GetLastError(); >>> >>> I feel, i given sufficient info, can we solve this. >>> >>> USBSCAN_GET_DESCRIPTOR UsbscanGetDescriptor = { 0 }; >>> USB_DEVICE_DESCRIPTOR UsbDeviceDescriptor = { 0 }; >>> >>> HANDLE hUsbDevice = CreateFile ( g_szDevPath,\ >>> GENERIC_READ | GENERIC_WRITE,\ >>> 0,\ >>> NULL,\ >>> OPEN_EXISTING,\ >>> 0,\ >>> NULL ); >>> >>> if ( INVALID_HANDLE_VALUE == hUsbDevice ) >>> { >>> dwError = GetLastError (); >>> ShowErrorMessage ( NULL, &dwError ); >>> MessageBox ( NULL, "Not able to create handle to USB device", "Sorry", >>> MB_OK ); >>> break; >>> } >>> >>> >>> dwSize = sizeof ( UsbDeviceDescriptor ); >>> UsbscanGetDescriptor.DescriptorType = USB_DEVICE_DESCRIPTOR_TYPE; >>> UsbscanGetDescriptor.Index = 1; >>> UsbscanGetDescriptor.LanguageId = 0; >>> >>> dwError = ( DWORD ) DeviceIoControl ( hUsbDevice, \ >>> IOCTL_GET_USB_DESCRIPTOR , \ >>> &UsbscanGetDescriptor, \ >>> sizeof ( UsbscanGetDescriptor ), \ >>> &UsbDeviceDescriptor, \ >>> dwSize, \ >>> &dwInDataSize, \ >>> NULL ); >>> if ( 0 == dwError ) >>> { >>> dwError = GetLastError ( ); >>> ShowErrorMessage ( NULL, &dwError ); >>> break; >>> } >>> >>> >>> Uwe Sieber wrote: >>>> shiva wrote: >>>>> hi Sten, >>>>> I am sure about the data i am asking for :)... >>>>> >>>>> I am using DeviceIoControl() function after createfile().\ >>>>> i am querying for USB_DEVICE_DESCRPTOR but always deviceIoControl >>>>> giving me "Invalid function" as error. >>>> And the IOCTL code you are using is still a big secret? >>>> >>>> I suspect you have used IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION >>>> as shown in the USBview sample I had pointed you on before. And which >>>> you havn't said thanks for btw, which would be good idea to keep the >>>> helpers happy. >>>> >>>> What you are obviously doing is trial and error programming. >>>> >>>> The USBview sample uses a handle to an USB HUB device. A different >>>> type of handle will not work. >>>> >>>> >>>> Uwe >
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