A debug pin can be used to probe timer interrupts with an oscilloscope or
other time measurement equipment. Thus, determine when an interrupt occurs
and how long the timer ISR takes.
The pin should be defined in the makefile as follows:
CFLAGS += -DDEBUG_TIMER_PORT=PORTF -DDEBUG_TIMER_DDR=DDRF \
-DDEBUG_TIMER_PIN=PORTF4
Since the `iotlab-term` target uses `tmux` error messages are not really
printed, so it took me a while to find out why at some sites this target
wasn't working for me anymore.
If the IoT-LAB password was changed, just checking if `.iotlabrc`
exists isn't enough, so I use `iotlab-experiment` to check if I'm logged
in properly to prompt the password input in case I'm not.
The flags from the ieee802154 struct are only used in the radio code.
there is no advantage of having them in the netdev_ieee802154_t struct
if the flags are defined differently per radio driver.
When selecting a directory to build using `-C` with make
`BUILD_IN_DOCKER` will fail, because the `BUILDRELPATH` chooses the path
`make` is executed in, not the path selected by `-C`. This fixes this
bug by replacing `PWD` in the macro's definition with `CURDIR`.
This change is a gnrc_ipv6_nib/gnrc_netif(2)-based rework of #7210.
Packet duplication
==================
Its main optimization is that it restructures `gnrc_ipv6` handling of
sent packets so that duplication for write-protection happens at the
latest possible step:
* potential `gnrc_netif` headers added by upper layers are
write-protected before their removal
* This unifies the duplication of the IPv6 header directly after
that
* Extension headers in-between the IPv6 header and the payload header
are duplicated just before the check sum is duplicated
Especially the last point allows for only handing a single packet snip
to all lower functions instead of an already searched IPv6 header
(which now is always the first until it is handed to the interface) +
payload header.
Further clean-ups
=================
* Next-hop link-layer address determination was moved to the
`_send_unicast` function, greatly simplifying the unicast case in the
`_send` function
* Code for loopback case was added to a new function `_send_to_self`
* Removed some code duplication
