I wonder that I could post a question I faced.
Hi, all.
I implemented USB CDC spec on the pxa270 reference board. I correctly send descriptors as Host requested and It works fine in AMD CPU hosted. but other Host which is Intel based can not recognize Descriptors.
I traced routine by inserting printf() and find out that Host can not take a Device descriptor that is requested by host second. (first descriptor before reset by host is correctly recognized.)
I know that OS will manage Enumeration steps but either Computer has same OS WinXP SP3.
Has anyone experienced this problem?
Thanks in advance. ------------------ Shin Jaeyong