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

[Andrew X. <xi...@gr...>]

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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