Hi, Chris,
> Also reading the readme file of the gnrc_networking_mac example I noted
> that it states that currently it should work only on samr21-xpro board.
Yes, since LwMAC has only been evaluated on samr21-xpro before, so to be
secure, the developers (me and Daniel-krebs) stated that it currently only
works with samr21-xpro.
> I'm wondering... which features should I search for in MCU/Boards in
> order to work with this module?
Basically, the current version of LwMAC requires RTT (real-time timer) for
supporting its low-duty cycling scheme.
So, if you want to run (the current version in RIOT) LwMAC, you need RTT on
your board (also with a frequency no less than 1k Hz of the RTT). ;-)
And, that is it! Since LwMAC was developed with the general netdev (radio)
APIs, you shouldn't need other (very specific) features for running LwMAC.
(But, notice that, you radio driver should also have RX-start, RX-complete and
TX-end interrupt events.)
PS: I have recently tested LwMAC on iotlab-m3 nodes (with some modifications on
RTT and some timer APIs, cheat/bypass the compiler), and it works (with unicast
and bcast). (But, principally, LwMAC currently don't support iotlab-m3, since
iotlab-m3 has a RTT of only 1Hz, don't try it yourself).
On the other hand, we are on the way to make LwMAC more generic (support more
boards), there are already some PRs about it.
We will try to replace the timer source module (i.e., RTT) with the more
general evtimer module (CPU timer). In short, after this work has been done
(maybe in recent months), you will not even need RTT for running LwMAC.
(actually, it will be like in an optional way, if the board has RTT, then use
it; otherwise use evtimer).
Cheers!
Shuguo
- 原始邮件 -
> 发件人: "Hawkboy" <chrishaw...@gmail.com>
> 收件人: devel@riot-os.org
> 发送时间: 星期一, 2017年 10 月 23日 下午 2:22:00
> 主题: [riot-devel] How to know whether a MCU/Board supports LwMAC ?
>
> Hi,
>
> I was reading about LwMAC here
> ttps://riot-os.org/api/group__net__gnrc__lwmac.html.
>
> Also reading the readme file of the gnrc_networking_mac example I noted
> that it states that currently it should work only on samr21-xpro board.
>
> I'm wondering... which features should I search for in MCU/Boards in
> order to work with this module?
>
> thanks,
>
> Chris
>
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