Answer to the Read-Only thread, http://www.keil.com/forum/20503/
> Could you tell me why the file name must be capital letters?
It comes from Short File Name restriction on FAT file system spec.
MS FAT32 System spec msdn.microsoft.com/.../gg463080.aspx
Name Limits and Character Sets Short Directory Entries Short names passed to the file system are always converted to upper case and their original case value is lost.
This restriction is familiar to old boys of MS-DOS age ;-)
> How can we make it support small letters?
Implement Long File Name support.
Tsuneo