Re: [Libusb-win32-devel] win-libusb async read

[Stephan M. <ste...@we...>]

>From mingw's errno.h:

#define	EIO		5	/* Input/output error */


> Here is the errno.h,  I don't see -5.
> 
> -Andrew
> 
> #ifndef __ERROR_H__
> #define __ERROR_H__
> 
> /* Connection timed out */
> #define ETIMEDOUT 116
> 
> typedef enum {
>   USB_ERROR_TYPE_NONE = 0,
>   USB_ERROR_TYPE_STRING,
>   USB_ERROR_TYPE_ERRNO,
> } usb_error_type_t;
> 
> 
> void usb_error(char *format, ...);
> void usb_message(char *format, ...);
> const char *usb_win_error_to_string(void);
> int usb_win_error_to_errno(void);
> 
> 
> 
> #endif /* _ERROR_H_ */
> 
> 
> ----- Original Message ----- 
> From: "Mark Bourne" <mb...@ze...>
> To: "Andrew Xiang" <xi...@gr...>;
> <lib...@li...>
> Sent: Wednesday, June 21, 2006 4:22 PM
> Subject: Re: [Libusb-win32-devel] win-libusb async read
> 
> 
> > You can set an environment variable USB_DEBUG to 1 or 2 for debug
> > messages. Also the C header file errno.h may give some clue as to what
> > the error numbers mean.
> >
> > Mark.
> >
> >
> > Andrew Xiang wrote:
> >
> > >Where do  I find out the file that keep a list of error like -5? And how
> can
> > >I enable the usberror output? I guess I have to have the DDK to recompile
> > >it? I don't have  the DDK installed.
> > >
> > >I cannot use multiple of 64, because there is the only way to detect end
> of
> > >the packet. Each block is 64bytes, if the block is not 64 blocks, that
> means
> > >it is the last block. This is the only way in the device I am using.
> Maybe I
> > >am missing something.
> > >
> > >I think I might have some hardware noise problem. Because I did not see
> the
> > >problem on another hardware.
> > >
> > >
> > >-Andrew
> > >
> > >
> > >----- Original Message ----- 
> > >From: "Stephan Meyer" <ste...@we...>
> > >To: <lib...@li...>; "Andrew Xiang"
> > ><xi...@gr...>
> > >Sent: Wednesday, June 21, 2006 3:49 PM
> > >Subject: Re: [Libusb-win32-devel] win-libusb async read
> > >
> > >
> > >
> > >
> > >>>#define BUF_SIZE (64*20+11)
> > >>>
> > >>>
> > >>Can you always guarantee that the last packet your device
> > >>sends is 11 bytes or less? If not, then set  BUF_SIZE to a multiple
> > >>of the endpoint's buffer size. Otherwise your device might produce
> > >>'data overrun' errors (this may cause the -5 error you got).
> > >>
> > >>
> > >>
> > >>> while(end_thread==0)
> > >>> {
> > >>> usb_bulk_setup_async(dev, &context0, EP_IN);
> > >>>   usb_submit_async(context0, tmp1, sizeof(tmp1));
> > >>> bytesread=usb_reap_async(context0, INFINITE);
> > >>> printf("%d bytes read back\n", bytesread);
> > >>> }
> > >>>
> > >>>
> > >>You forgot to free 'context', call usb_free_async().
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> > >>
> > >>
> > >>
> > >
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> > >
> > >
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> > _______________________________________________
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> >
> 
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