All,

 

I'm wondering, are there any Windows specific technical or timing considerations that may be needed in a UDC driver to support a linux usb file storage gadget which accesses file backed storage residing on a YAFFS2 volume?

 

My configuration is an embedded linux device with a YAFFS2 file system running on an ARM9 processor. I created two tests - one with FAT12 formatted file and another with FAT32 a formatted file. Both behave the same...

 

LOCALLY :) - Mounting the FAT file works correctly. I can read and write content to it.

 

USB TO LINUX PC :) - When connected to a Linux computer, the storage mounts properly (plugging and unplugging works) and Linux allows me to read and write files to the mounted storage.

 

USB TO WINDOWS PC :( - However, when connected to a Windows system (XP or Windows 7), Windows only identifies the USB storage device (putting an icon for it as storage under Computer); but I can't write to the storage nor even determine the size of the storage space (which returns zero). Whether by the desktop or via a cmd window, the error I is "cannot find the file specified" - just even selecting the drive letter.

 

Oner