[riot-devel] Setting options in an IEEE 802.15.4 driver

Martine Lenders authmillenon at gmail.com
Fri Apr 1 13:59:13 CEST 2016


Hi,
just tested the behavior with `examples/default` and setting the short
address is working, so it might be a bit messy implemented (mostly because
`netdev2_ieee802154_set()` was introduced later in the process), but it IS
working.

Cheers,
Martine

2016-04-01 6:55 GMT+02:00 Aaron Sowry <aeneby at gmail.com>:

> Actually, I don't think netdev2_ieee802154_set() will ever be called
> from _set(), since the check to call this is 'if (res == -ENOTSUP)'.
> 'res' is set to '0' before the case statement and never changed in the
> case of NETOPT_ADDRESS, so I guess the only reason it works at all is
> because the device struct's 'short_addr' is being set (incorrectly?)
> by at86rf2xx_set_addr_short()?
>
> /Aaron
>
> 2016-04-01 16:27 GMT+13:00 Aaron Sowry <aeneby at gmail.com>:
> > Hi,
> >
> > I'm currently working on an 802.15.4 driver, and trying to use all the
> > fancy new boilerplate functionality which was merged recently. I'm
> > using the at86rf2xx driver as inspiration, but the way it sets some
> > options (e.g. the long and short addresses) confuses me a bit.
> >
> > The at86rf2xx's netdev set() function, when called with
> > NETOPT_ADDRESS, will call at86rf2xx_set_addr_short() which sets the
> > short_addr of the device struct along with some other
> > at86rf2xx-specific stuff. At the end of the case statement, however,
> > it then calls netdev2_ieee802154_set() *as well*, which appears to do
> > the same thing again (minus the chip-specific stuff).
> >
> > Perhaps I'm getting lost in a forest of extended structs, but is this
> > intentional? It seems like at86rf2xx_set_addr_short() should *only* be
> > doing the chip-specific stuff, and leaving the rest up to
> > netdev2_ieee802154_set()? I hope my description's not too hard to
> > follow.
> >
> > Cheers,
> > Aaron
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