Minor descriptor issue Topic is solved

[MaximLiadov]

Hello everyone,

Thesycon tdd doesn't like the descriptor.

0x02 0x0409 Request failed with 0x0000001F

No big deal, but would be nice to fix.
The string "" or null is apparently not allowed.

This affects sw_usb_audio_sw_v8_1_0 and all previous sources.

[danielp]

This has been fixed in lib_xua. Thesycon tdd no longer reports this error with our latest codebase. This will soon be released as sw_usb_audio v9.0.0.

[MaximLiadov]

Great to hear! Big respect.

[Ross]

To add some detail to this:

This is the serial number string. The default behaviour was to report "none" i.e. iSerialNumber = 0.

However, due to restrictions relating to Windows this is not supported by the latest DFU behaviour, the default behaviour is now to respond with an empty string.

(It's currently expected that the user adds their own implementation as/if required)

[MaximLiadov]

Thanks, Ross!

Modifications that worked for me (tested with XTC14 old code):

Code: Select all

// descriptor.h

.serialStr                   = "12345",

// null_descs.h

#ifndef SERIAL_STR_INDEX
#define SERIAL_STR_INDEX 0x0003
#warning SERIAL_STR_INDEX not defined, using 0x0003
#endif

SERIAL_STR_INDEX,               /* 16 iSerialNumber : Index of serial number decriptor */