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Re: [Libusb-win32-devel] Help, please
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From: Stephan M. <Ste...@ia...> - 2007-06-06 14:54:08
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ETIMEOUT - your request timed out.
Use a timeout parameter > 0 (on Windows '0' means 0ms not infinite)
Stephan
> OK, now it returns -116. What next? (What does -116 mean?)
>
> Thanks,
>
> Dave
>
> > -----Original Message-----
> > From: lib...@li...
> > [mailto:lib...@li...] On
> > Behalf Of Stephan Meyer
> > Sent: 2007 June 06 15:44
> > To: lib...@li...
> > Subject: Re: [Libusb-win32-devel] Help, please
> >
> > Check the 'ep' parameter. This parameter must be the
> > full endpoint address including the direction bit (bit7).
> >
> > Stephan
> >
> >
> >
> > > I just checked the return value of the usb_interrupt_read
> > () call - it's
> > > always -22.
> > >
> > > Dave
> > >
> > > > -----Original Message-----
> > > > From: lib...@li...
> > > > [mailto:lib...@li...] On
> > > > Behalf Of Dave Higton
> > > > Sent: 2007 June 06 15:20
> > > > To: lib...@li...
> > > > Subject: Re: [Libusb-win32-devel] Help, please
> > > >
> > > > Wow, what a rapid reply! Thanks. I tried your fix, and
> > it has got me
> > > > one step further.
> > > >
> > > > (I note that usb_set_configuration (udev, 0) gives the same
> > > > error -22 as
> > > > not calling it. The only configuration I have is
> > numbered 0; is this
> > > > OK?)
> > > >
> > > > Setting configuration to 1 makes the call return 0, so it
> > looks like
> > > > it's working, but it fails at the next step. In the main
> > loop, I do:
> > > >
> > > > printf ("Starting...\n");
> > > > while (1)
> > > > {
> > > > if (usb_interrupt_read (contact_closure_usb_dev,
> > > > contact_closure_usb_input_endpoint,
> > > > cBuf,
> > > > 4,
> > > > 0) > 0)
> > > > {
> > > > printf ("Got some\n");
> > > > }
> > > > }
> > > >
> > > > but the printf statement is never executed, although I am
> > doing things
> > > > that should cause the interface to send messages - which
> > are 4 bytes
> > > > each.
> > > >
> > > > Any more ideas?
> > > >
> > > > Dave
> > > >
> > > > > -----Original Message-----
> > > > > From: lib...@li...
> > > > > [mailto:lib...@li...] On
> > > > > Behalf Of Stephan Meyer
> > > > > Sent: 2007 June 06 14:05
> > > > > To: lib...@li...
> > > > > Subject: Re: [Libusb-win32-devel] Help, please
> > > > >
> > > > > Try to replace:
> > > > >
> > > > > uci = usb_claim_interface (udev, 0);
> > > > >
> > > > > with
> > > > >
> > > > > usb_set_configuation(udev, 1);
> > > > > uci = usb_claim_interface (udev, 0);
> > > > >
> > > > > It should work then.
> > > > >
> > > > >
> > > > > Stephan
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > > Help, please. I've started writing a programme to use
> > > > > libusb-win32, but
> > > > > > I'm getting an error right at the start.
> > > > > >
> > > > > > First, some background. I've used libusb under Linux
> > > > > (Fedora Core 5)
> > > > > > successfully, to write driver functions for the first USB
> > > > > device that I
> > > > > > wrote firmware for. That device works entirely happily
> > > > > under FC5 and
> > > > > > under RISC O (yes, the Acorn/Pace/Castle one). I
> > have now written
> > > > > > firmware for a second device. Perhaps unsurprisingly,
> > > > this device's
> > > > > > firmware is very heavily based on the previous one. This
> > > > > device also
> > > > > > works entirely happily under RISC OS. I thought I'd try
> > > > > this Windows
> > > > > > thing, but I'm having no success.
> > > > > >
> > > > > > The entire programme is here:
> > > > > >
> > > > > > // Can I get this system to do what I want?
> > > > > > #include <usb.h>
> > > > > > #include <stdio.h>
> > > > > >
> > > > > > #define VENDOR_ID_NICE 0x16A8
> > > > > > #define PRODUCT_ID_CONTACT_CLOSURE 0x0004
> > > > > >
> > > > > > int init (void)
> > > > > > {
> > > > > > //int usb_busses;
> > > > > > struct usb_bus* bus;
> > > > > > struct usb_device* dev;
> > > > > > usb_dev_handle *udev;
> > > > > > int retval = -1;
> > > > > > int uci;
> > > > > > int done = 0;
> > > > > >
> > > > > > printf ("Hello\n");
> > > > > >
> > > > > > usb_init ();
> > > > > > usb_find_busses ();
> > > > > > usb_find_devices ();
> > > > > > for (bus = usb_get_busses (); bus; bus = bus->next)
> > > > > > {
> > > > > > for (dev = bus->devices; dev && (done == 0); dev =
> > > > > > dev->next)
> > > > > > {
> > > > > > udev = usb_open (dev);
> > > > > > printf ("udev = %p\n", udev);
> > > > > > if ((dev->descriptor.idVendor == VENDOR_ID_NICE)
> > > > > > && (dev->descriptor.idProduct ==
> > > > > > PRODUCT_ID_CONTACT_CLOSURE))
> > > > > > {
> > > > > > printf ("Found it!\n");
> > > > > > uci = usb_claim_interface (udev, 0);
> > > > > > printf ("Return value from
> > > > > > usb_claim_interface: %d\n", uci);
> > > > > > retval = uci;
> > > > > > done = 1;
> > > > > > }
> > > > > > else
> > > > > > {
> > > > > > printf ("Not ours, VID = %04X, PID =
> > > > > > %04X\n", dev->descriptor.idVendor, dev->descriptor.idProduct);
> > > > > > usb_close (udev);
> > > > > > printf ("Closed: %p\n", udev);
> > > > > > }
> > > > > > }
> > > > > > }
> > > > > > return retval;
> > > > > > }
> > > > > >
> > > > > > int main (void)
> > > > > > {
> > > > > > int init_result;
> > > > > >
> > > > > > init_result = init ();
> > > > > > if (init_result == 0)
> > > > > > {
> > > > > > printf ("Starting...\n");
> > > > > > }
> > > > > > else
> > > > > > {
> > > > > > printf ("Failed\n");
> > > > > > }
> > > > > > }
> > > > > >
> > > > > > When I run it, I get a couple of "Not ours, VID = " etc.
> > > > > messages for
> > > > > > other USB items I have, followed by "Found it!" But then
> > > > > "Return value
> > > > > > from usb_claim_interface: -22" which I don't understand.
> > > > I think it
> > > > > > indicates an illegal parameter. udev must be OK, I assume.
> > > > > My device
> > > > > > only has interface 0. It's a very simple device, with a
> > > > > vendor-specific
> > > > > > protocol, specified at interface level.
> > > > > >
> > > > > > Can anyone see what I'm doing wrong, please?
> > > > > >
> > > > > > libusb-win32 downloaded from the main libusb-win32 site
> > > > > this week. No
> > > > > > previous copy on this computer. Windows XP.
> > > > > >
> > > > > > Dave
>
>
>
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