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

[Mark B. <mc...@ec...>]

That's libusb's error.h. I meant errno.h from the compiler's standard 
headers - maybe I wasn't as clear as I could have been. MinGW has a 
comment by each value here, can't comment on how helpful other compilers 
might be:
#define    EIO        5    /* Input/output error */

Mark.


Andrew Xiang wrote:

>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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