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From: Dan M. <dan...@gm...> - 2007-04-02 22:12:52
|
Hi there,
When trying to compile the example program [testlibusb_win.c], I get an
error when I try to access the variables of the struct usb_config_descriptor,
which is been pointed by the variable struct usb_device *dev. The function,
for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
print_configuration(&dev->config[i]);
passes a valid memory address, but all of its values are NULL. So when I try
to run this function,
static void print_configuration(struct usb_config_descriptor *config)
{
int i;
edit_printf(" wTotalLength: %d\r\n", config->wTotalLength);
edit_printf(" bNumInterfaces: %d\r\n", config->bNumInterfaces);
edit_printf(" bConfigurationValue: %d\r\n",
config->bConfigurationValue);
edit_printf(" iConfiguration: %d\r\n", config->iConfiguration);
edit_printf(" bmAttributes: %02xh\r\n", config->bmAttributes);
edit_printf(" MaxPower: %d\r\n", config->MaxPower);
for (i = 0; i < config->bNumInterfaces; i++)
print_interface(&config->interface[i]);
}
it stops on this line,
edit_printf(" wTotalLength: %d\r\n", config->wTotalLength);
giving the following error message:
Project raised exception EAccessViolation with message 'Access violation at
address 00401A82. Read of address 00000035'. Process stopped.
the address 00000035 is owned by the variable the program tried to access,
config->wTotalLength.
If I don't use this struct, the program runs fine, but I don't get all the
info the pre-compiled program gets, only Bus, Device, Vendor ID, Product ID,
Manufacturer and Product.
Do you have an idea of why this is happening? Could be the compiler's fault?
I'm using Borland C++ Builder 6's compiler. Any comments will be very
welcomed. Thanks in advance,
Dan Leite Martins
|
|
From: Dan M. <dan...@gm...> - 2007-04-05 18:46:12
|
I have this:
windows xp service pack 2
borland c++ builder version 6.0 (build 10.157)
libusb-win32 0.1.12.1
the thing is the precompiled program works fine with the hardware, giving me
all the info I can't get when I try to compile the program myself. that's
why I think it's a problem with the compiler. any ideas? thanks in advance.
Dan Leite Martins
On 4/3/07, Stephan Meyer <ste...@we...> wrote:
>
>
> This sound like an alignment problem.
> Some BC6 versions had serious bugs in the pshpack*.h files.
> Do you have the latest service pack installed?
>
> Stephan
>
>
> >
> > Hi there,
> >
> >
> > When trying to compile the example program [testlibusb_win.c], I get an
> error when I try to access the variables of the struct usb_config_descriptor
> > , which is been pointed by the variable struct usb_device *dev. The
> function,
> >
> >
> > for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
> > print_configuration(&dev->config[i]);
> >
> >
> > passes a valid memory address, but all of its values are NULL. So when I
> try to run this function,
> >
> >
> >
> > static void print_configuration(struct usb_config_descriptor *config)
> > {
> > int i;
> >
> > edit_printf(" wTotalLength: %d\r\n", config->wTotalLength);
> >
> > edit_printf(" bNumInterfaces: %d\r\n",
> config->bNumInterfaces);
> > edit_printf(" bConfigurationValue: %d\r\n",
> config->bConfigurationValue);
> > edit_printf(" iConfiguration: %d\r\n",
> config->iConfiguration);
> >
> > edit_printf(" bmAttributes: %02xh\r\n",
> config->bmAttributes);
> > edit_printf(" MaxPower: %d\r\n", config->MaxPower);
> >
> >
> > for (i = 0; i < config->bNumInterfaces; i++)
> > print_interface(&config->interface[i]);
> > }
> >
> >
> > it stops on this line,
> >
> >
> > edit_printf(" wTotalLength: %d\r\n", config->wTotalLength);
> >
> >
> >
> > giving the following error message:
> >
> >
> > Project raised exception EAccessViolation with message 'Access
> violation at address 00401A82. Read of address 00000035'. Process stopped.
> >
> >
> >
> > the address 00000035 is owned by the variable the program tried to
> access, config->wTotalLength.
> >
> >
> > If I don't use this struct, the program runs fine, but I don't get all
> the info the pre-compiled program gets, only Bus, Device, Vendor ID, Product
> ID, Manufacturer and Product.
> >
> >
> > Do you have an idea of why this is happening? Could be the compiler's
> fault? I'm using Borland C++ Builder 6's compiler. Any comments will be very
> welcomed. Thanks in advance,
> >
> >
> > Dan Leite Martins
> >
> > -----------------------------------------------------------------
> >
> -------------------------------------------------------------------------
> > Take Surveys. Earn Cash. Influence the Future of IT
> > Join SourceForge.net's Techsay panel and you'll get the chance to share
> your
> > opinions on IT & business topics through brief surveys-and earn cash
> >
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> >
> > -----------------------------------------------------------------
> > _______________________________________________
> > Libusb-win32-devel mailing list
> > Lib...@li...
> > https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
> >
>
>
> _______________________________________________________________
> SMS schreiben mit WEB.DE FreeMail - einfach, schnell und
> kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share
> your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Libusb-win32-devel mailing list
> Lib...@li...
> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>
|
|
From: 25an <man...@gm...> - 2007-05-28 11:19:48
|
I changed in the usb.h file
/* ensure byte-packed structures */
#pragma pack(1)
#pragma pack(push)
#pragma pack(pop)
//#include <pshpack1.h>
This made it work but I got some warnings that I have not yet managed to
solve I guess it have something to do how I am using the pragma I have not
figured out how the pragma pack works.
Dan Martins-2 wrote:
>
> I have this:
>
> windows xp service pack 2
> borland c++ builder version 6.0 (build 10.157)
> libusb-win32 0.1.12.1
>
> the thing is the precompiled program works fine with the hardware, giving
> me
> all the info I can't get when I try to compile the program myself. that's
> why I think it's a problem with the compiler. any ideas? thanks in
> advance.
>
> Dan Leite Martins
>
>
> On 4/3/07, Stephan Meyer <ste...@we...> wrote:
>>
>>
>> This sound like an alignment problem.
>> Some BC6 versions had serious bugs in the pshpack*.h files.
>> Do you have the latest service pack installed?
>>
>> Stephan
>>
>>
>> >
>> > Hi there,
>> >
>> >
>> > When trying to compile the example program [testlibusb_win.c], I get an
>> error when I try to access the variables of the struct
>> usb_config_descriptor
>> > , which is been pointed by the variable struct usb_device *dev. The
>> function,
>> >
>> >
>> > for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
>> > print_configuration(&dev->config[i]);
>> >
>> >
>> > passes a valid memory address, but all of its values are NULL. So when
>> I
>> try to run this function,
>> >
>> >
>> >
>> > static void print_configuration(struct usb_config_descriptor *config)
>> > {
>> > int i;
>> >
>> > edit_printf(" wTotalLength: %d\r\n",
>> config->wTotalLength);
>> >
>> > edit_printf(" bNumInterfaces: %d\r\n",
>> config->bNumInterfaces);
>> > edit_printf(" bConfigurationValue: %d\r\n",
>> config->bConfigurationValue);
>> > edit_printf(" iConfiguration: %d\r\n",
>> config->iConfiguration);
>> >
>> > edit_printf(" bmAttributes: %02xh\r\n",
>> config->bmAttributes);
>> > edit_printf(" MaxPower: %d\r\n", config->MaxPower);
>> >
>> >
>> > for (i = 0; i < config->bNumInterfaces; i++)
>> > print_interface(&config->interface[i]);
>> > }
>> >
>> >
>> > it stops on this line,
>> >
>> >
>> > edit_printf(" wTotalLength: %d\r\n", config->wTotalLength);
>> >
>> >
>> >
>> > giving the following error message:
>> >
>> >
>> > Project raised exception EAccessViolation with message 'Access
>> violation at address 00401A82. Read of address 00000035'. Process
>> stopped.
>> >
>> >
>> >
>> > the address 00000035 is owned by the variable the program tried to
>> access, config->wTotalLength.
>> >
>> >
>> > If I don't use this struct, the program runs fine, but I don't get all
>> the info the pre-compiled program gets, only Bus, Device, Vendor ID,
>> Product
>> ID, Manufacturer and Product.
>> >
>> >
>> > Do you have an idea of why this is happening? Could be the compiler's
>> fault? I'm using Borland C++ Builder 6's compiler. Any comments will be
>> very
>> welcomed. Thanks in advance,
>> >
>> >
>> > Dan Leite Martins
>> >
>> > -----------------------------------------------------------------
>> >
>> -------------------------------------------------------------------------
>> > Take Surveys. Earn Cash. Influence the Future of IT
>> > Join SourceForge.net's Techsay panel and you'll get the chance to share
>> your
>> > opinions on IT & business topics through brief surveys-and earn cash
>> >
>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>> >
>> > -----------------------------------------------------------------
>> > _______________________________________________
>> > Libusb-win32-devel mailing list
>> > Lib...@li...
>> > https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>> >
>>
>>
>> _______________________________________________________________
>> SMS schreiben mit WEB.DE FreeMail - einfach, schnell und
>> kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192
>>
>>
>> -------------------------------------------------------------------------
>> Take Surveys. Earn Cash. Influence the Future of IT
>> Join SourceForge.net's Techsay panel and you'll get the chance to share
>> your
>> opinions on IT & business topics through brief surveys-and earn cash
>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>> _______________________________________________
>> Libusb-win32-devel mailing list
>> Lib...@li...
>> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share
> your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Libusb-win32-devel mailing list
> Lib...@li...
> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>
>
--
View this message in context: http://www.nabble.com/Error-compiling-test-program-tf3508594.html#a10834691
Sent from the LibUSB Dev - Win32 mailing list archive at Nabble.com.
|
|
From: 25an <man...@gm...> - 2007-05-28 11:32:28
|
I have look at it some more and this is what I did
In the file usb.h I changed the line where
#include <pshpack1.h>
with
#pragma pack(push, 1)
and at the line where
#include <poppack.h>
with
#pragma pack(pop, 1)
25an wrote:
>
> I changed in the usb.h file
>
> /* ensure byte-packed structures */
> #pragma pack(1)
> #pragma pack(push)
> #pragma pack(pop)
> //#include <pshpack1.h>
>
> This made it work but I got some warnings that I have not yet managed to
> solve I guess it have something to do how I am using the pragma I have not
> figured out how the pragma pack works.
>
>
> Dan Martins-2 wrote:
>>
>> I have this:
>>
>> windows xp service pack 2
>> borland c++ builder version 6.0 (build 10.157)
>> libusb-win32 0.1.12.1
>>
>> the thing is the precompiled program works fine with the hardware, giving
>> me
>> all the info I can't get when I try to compile the program myself. that's
>> why I think it's a problem with the compiler. any ideas? thanks in
>> advance.
>>
>> Dan Leite Martins
>>
>>
>> On 4/3/07, Stephan Meyer <ste...@we...> wrote:
>>>
>>>
>>> This sound like an alignment problem.
>>> Some BC6 versions had serious bugs in the pshpack*.h files.
>>> Do you have the latest service pack installed?
>>>
>>> Stephan
>>>
>>>
>>> >
>>> > Hi there,
>>> >
>>> >
>>> > When trying to compile the example program [testlibusb_win.c], I get
>>> an
>>> error when I try to access the variables of the struct
>>> usb_config_descriptor
>>> > , which is been pointed by the variable struct usb_device *dev. The
>>> function,
>>> >
>>> >
>>> > for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
>>> > print_configuration(&dev->config[i]);
>>> >
>>> >
>>> > passes a valid memory address, but all of its values are NULL. So when
>>> I
>>> try to run this function,
>>> >
>>> >
>>> >
>>> > static void print_configuration(struct usb_config_descriptor
>>> *config)
>>> > {
>>> > int i;
>>> >
>>> > edit_printf(" wTotalLength: %d\r\n",
>>> config->wTotalLength);
>>> >
>>> > edit_printf(" bNumInterfaces: %d\r\n",
>>> config->bNumInterfaces);
>>> > edit_printf(" bConfigurationValue: %d\r\n",
>>> config->bConfigurationValue);
>>> > edit_printf(" iConfiguration: %d\r\n",
>>> config->iConfiguration);
>>> >
>>> > edit_printf(" bmAttributes: %02xh\r\n",
>>> config->bmAttributes);
>>> > edit_printf(" MaxPower: %d\r\n", config->MaxPower);
>>> >
>>> >
>>> > for (i = 0; i < config->bNumInterfaces; i++)
>>> > print_interface(&config->interface[i]);
>>> > }
>>> >
>>> >
>>> > it stops on this line,
>>> >
>>> >
>>> > edit_printf(" wTotalLength: %d\r\n", config->wTotalLength);
>>> >
>>> >
>>> >
>>> > giving the following error message:
>>> >
>>> >
>>> > Project raised exception EAccessViolation with message 'Access
>>> violation at address 00401A82. Read of address 00000035'. Process
>>> stopped.
>>> >
>>> >
>>> >
>>> > the address 00000035 is owned by the variable the program tried to
>>> access, config->wTotalLength.
>>> >
>>> >
>>> > If I don't use this struct, the program runs fine, but I don't get all
>>> the info the pre-compiled program gets, only Bus, Device, Vendor ID,
>>> Product
>>> ID, Manufacturer and Product.
>>> >
>>> >
>>> > Do you have an idea of why this is happening? Could be the compiler's
>>> fault? I'm using Borland C++ Builder 6's compiler. Any comments will be
>>> very
>>> welcomed. Thanks in advance,
>>> >
>>> >
>>> > Dan Leite Martins
>>> >
>>> > -----------------------------------------------------------------
>>> >
>>> -------------------------------------------------------------------------
>>> > Take Surveys. Earn Cash. Influence the Future of IT
>>> > Join SourceForge.net's Techsay panel and you'll get the chance to
>>> share
>>> your
>>> > opinions on IT & business topics through brief surveys-and earn cash
>>> >
>>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>>> >
>>> > -----------------------------------------------------------------
>>> > _______________________________________________
>>> > Libusb-win32-devel mailing list
>>> > Lib...@li...
>>> > https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>>> >
>>>
>>>
>>> _______________________________________________________________
>>> SMS schreiben mit WEB.DE FreeMail - einfach, schnell und
>>> kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192
>>>
>>>
>>> -------------------------------------------------------------------------
>>> Take Surveys. Earn Cash. Influence the Future of IT
>>> Join SourceForge.net's Techsay panel and you'll get the chance to share
>>> your
>>> opinions on IT & business topics through brief surveys-and earn cash
>>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>>> _______________________________________________
>>> Libusb-win32-devel mailing list
>>> Lib...@li...
>>> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>>>
>>
>> -------------------------------------------------------------------------
>> Take Surveys. Earn Cash. Influence the Future of IT
>> Join SourceForge.net's Techsay panel and you'll get the chance to share
>> your
>> opinions on IT & business topics through brief surveys-and earn cash
>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>> _______________________________________________
>> Libusb-win32-devel mailing list
>> Lib...@li...
>> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>>
>>
>
>
--
View this message in context: http://www.nabble.com/Error-compiling-test-program-tf3508594.html#a10834801
Sent from the LibUSB Dev - Win32 mailing list archive at Nabble.com.
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