TDMA slot(bh)

[Adrian Chadd]

Yup.

DBA gates the actual beacon transmit - if there's no beacon in the
slot, then it's fine.

SWBA is the software timer that fires just before DBA, so the software
stack has a chance to program the hardware with a beacon and let the
hardware get the packet DMA -> TX FIFO setup all correctly so that
when it's DBA time (ie, time to /transmit/ the beacon), it's already
ready to go.


-adrian


On 18 February 2015 at 09:09, bh <u8j9 at 163.com> wrote:
> Dear Adrian
>       In ath_intr , there are a variable which decrease every swba, so when the variable swbaintalval is zero, ap will send beacon .So I  think the period of swba is slot time,  ap will send beacon every five slot, the beacon interval is five slottime?
>
> Adrian Chadd <adrian at freebsd.org>编写：
>
>>On 18 February 2015 at 07:55, bh <u8j9 at 163.com> wrote:
>>> Dear
>>>     The default slotcnt=2 , becntival=5.For ap  it will generate SWBA every  slot,it will send beacon every five slots, beacause ap fire  the DBA timer in every slot, so it will send data package  in every slot. Is my above understanding correct?
>>
>>It generates SWBA every beacon interval, which is calculated in
>>ath_tdma_bintvalsetup().
>>
>>Master stations beacon 20 times a second with the default config
>>specified by the wiki.
>>
>>
>>-adrian