On Thu, Apr 15, 2010 at 10:40:21AM +0800, Qing Pei Wang wrote:
i had tested the OHCI keyboard, the works
Great! Please send the full SeaBIOS log.
but not pretty good as enough.
the reaction time is too long.
Is the time it takes a key to be shown too long? Or are keys being
lost when typing fast?
So i am trying to learn more about this things.
BTW, seabios/OHCI use count=DIV_ROUND_UP(PIT_TICK_INTERVAL * 1000 * 2,
PIT_TICK_RATE * ms)+1
as the td count. i can not find any document about that. Where can i find
or some place i missing with OHCI spec?
That's internal to SeaBIOS. SeaBIOS doesn't register a hardware irq
for usb, instead it polls for USB activity on every timer interrupt
(~55ms). The above calculation determines how many key events to
queue so that no keyboard drops occur. Usually a keyboard requests
service every 10ms, causing the above calculation will return 11 queue