20 Jul
2012
20 Jul
'12
3:44 p.m.
Dear Benoît Thébaudeau,
On Friday 20 July 2012 13:37:37 Stefan Herbrechtsmeier wrote:
Am 20.07.2012 13:26, schrieb Benoît Thébaudeau:
int xfr_bytes = min(left_length,(QT_BUFFER_CNT * 4096 -((uint32_t)buf_ptr & 4095)) &~4095);Why you align the length to 4096?
It's to guarantee that each transfer length is a multiple of the max packet length. Otherwise, early short packets are issued, which breaks the transfer and results in time-out error messages.
Early short packets ? What do you mean?
Regards, Benoît
Best regards, Marek Vasut