Posted on January 17, 2014 at 13:08Hello,
Maybe anyone have met with situation or have any hints where to look for problem if I receive data in ''EPx_OUT_Callback()'' function only by one byte, even if it was sent significantly larger amount of it.
USB irq handler is taken from V4.0.0 USB-FS-Device library - ''VirtualComport_Loopback'' project.
Everything else seems to be working fine - performance not yet tested, device is recognized, using ''CDC_Send_DATA()'' function data to PC is transmitted in packets up to 63 bytes per packet. Bet when it comes to receiving info sent by PC - in ''EP3_OUT_Callback()'' I receive only packets of len == 1, if string sent from PC is longer than 1B it is received only as multiple transmissions of len == 1.
Any offers where to start looking for problems?
Laurynas.
