Цитата(Polaris @ Nov 8 2011, 00:14)

Спасибо за возможные ответы!
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A Solution to the dribble bit problem для USB host controller hangs on a dribble bit (LPC1769/68/66/65 only)3.12 USB.1: USB host controller hangs on a dribble bit (LPC1769/68/66/65
only)
Introduction:
Full-/low-speed signaling uses bit stuffing throughout the packet without exception. If the
receiver sees seven consecutive ones anywhere in the packet, then a bit stuffing error has
occurred and the packet should be ignored.
The time interval just before an EOP is a special case. The last data bit before the EOP
can become stretched by hub switching skews. This is known as dribble and can lead to a
situation where dribble introduces a sixth bit that does not require a bit stuff. Therefore,
the receiver must accept a packet for which there are up to six full bit times at the port with
no transitions prior to the EOP.
Problem:
The USB host controller will hang indefinitely if it sees a dribble bit on the USB bus. It will
hang the first time a dribble bit is seen. Once it is in this state there is no recovery other
than a hard chip reset. This problem has no effect on the USB device controller.
Work-around:
None.