Re: [Libusb-win32-devel] application works with older libusb-win32 but not with version 0.1.12.1

[Stephan M. <Ste...@ia...>]

> err = usb_set_configuration(m_dev, 1);

* is '1' a valid configuration value?
  This value must by the config-descriptors 'bConfigurationValue'
* try usb_set_configuration(m_dev, dev->config[0].bConfigurationValue) 

Stephan


> 
> Hi,
> 
> the error message is
> "usb_set_configuration: could not set config 1: win error: The parameter 
is
> incorrect.".
> 
> Michael
> 
> 
> Stephan Meyer-2 wrote:
> > 
> > What's the error message returned
> > by usb_strerror()?
> > 
> > Stephan
> > 
> > 
> >> 
> >> Hi,
> >> 
> >> I have a VisualC++ 6.0-application (MFC) for Windows XP.
> >> This application is supposed to communicate with a microcontroller 
using
> >> Bulk writes over USB.
> >> With an older version of libusb (can't tell you the version, but it's 

> > from
> >> 05 August 2006) the application works fine. Now I downloaded the 
newest
> >> version of libusb (not the filter-driver!) and created a new 
inf-file.
> >> After installing the new driver the application does not work any 
more!
> >> The relevant code is:
> >> ---------------------------------------------------
> >> usb_init();
> >> usb_find_busses();
> >> usb_find_devices();
> >> for (m_bus = usb_get_busses(); m_bus; m_bus = m_bus->next)
> >> {
> >>    struct usb_device *dev;
> >>    for (dev = m_bus->devices; dev; dev = dev->next)
> >>    {
> >>       if (dev->descriptor.bDeviceClass == 0xff)   //find for vendor 
> >> specific class
> >>       {
> >>          m_dev = usb_open(dev);
> >>          if (m_dev)
> >>          {
> >>             if ((dev->descriptor.idVendor == USB_VENDOR) && 
> >>             (dev->descriptor.idProduct == USB_PRODUCT))
> >>             {
> >>                int err;
> >>                err = usb_set_configuration(m_dev, 1);
> >>                if (err)
> >>                {
> >>                   char* s= usb_strerror();
> >>                   m_strInitStatus = s;
> >>                   UpdateData(FALSE);
> >>                   return;
> >>                }
> >>                err = usb_claim_interface(m_dev, 0);
> >>                if (err)
> >>                {
> >>                   char* s= usb_strerror();
> >>                   m_strInitStatus = s;
> >>                   UpdateData(FALSE);
> >>                   return;
> >>                }
> >>             }
> >>          }
> >>       }
> >>    }
> >> }
> >> 
> > 
> 
------------------------------------------------------------------------------------
> >> 
> >> With the new version of libusb the usb_set_configuration(...) call 
> > returns
> >> with an error and tells me, that configuration 1 could not be set 
> > because
> >> the parameter is invalid...
> >> If I use the new libusb0.dll, the new libusb.lib and the OLD 
libusb0.sys 
> > the
> >> application works fine again.
> >> 
> >> Can someone please tell me where I am going wrong?
> >> Thank you in advantage for your help
> >> -- 
> >> View this message in context: http://www.nabble.com/application-
> >> works-with-older-libusb-win32-but-not-with-version-0.1.12.1-
> >> tf4770195.html#a13644735
> >> Sent from the LibUSB Dev - Win32 mailing list archive at Nabble.com.
> >> 
> >> 
> >> 
> > 
-------------------------------------------------------------------------
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> >> Still grepping through log files to find problems?  Stop.
> >> Now Search log events and configuration files using AJAX and a 
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> >> _______________________________________________
> >> Libusb-win32-devel mailing list
> >> Lib...@li...
> >> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
> > 
> > 
> > 
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> > Still grepping through log files to find problems?  Stop.
> > Now Search log events and configuration files using AJAX and a 
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> > _______________________________________________
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> > https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
> > 
> > 
> 
> -- 
> View this message in context: http://www.nabble.com/application-
> works-with-older-libusb-win32-but-not-with-version-0.1.12.1-
> tf4770195.html#a13664629
> Sent from the LibUSB Dev - Win32 mailing list archive at Nabble.com.
> 
> 
> 
-------------------------------------------------------------------------
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> Still grepping through log files to find problems?  Stop.
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