Change documentation on return codes in periph/timer API to
return 0 on success and (-1) on error by default.
For timer_init this was already the case, but for timer_set,
timer_set_absolute, and timer_clear this is now changed
from 1 to 0 for success, while error remains (-1).
The INTFLAGS register is cleared by writing a 1 to the corresponding interrupt
flag bit. From the samr21's manual:
> Writing a zero to this bit has no effect.
> Writing a one to this bit clears the Compare 0 interrupt flag.
This is a common pattern in flag registers.
This RTT driver is using or-equal to clear the flags, which means it can
possibly clear other interrupts. There's a small chance that one event is
missed if it happens very close to another event.
Credits to @benpicco, @dylad for pointing out missing fixes.
When flashing some applications the flasher sometimes gets stuck which
prevents flashing after.
It may be from a specific firmware or operation but do not have one yet.
Connect with reset asserted fix flashing from this state.
It was found after the `stm32f3discovery` get stuck in a non-flashable mode
after some firmwares.
- Moved compiler & linker flags from boards/common/msba2 to cpu/arm7_common
- Moved dependency to newlib nano to cpu/arm7_common
- Moved config to link in cpu/startup.o to cpu/arm7_common
llvm-ar behaves weidly when creating thin archive. This only manifests
itself when using arduino sketches as these are built from the "bin"
directory.
Specifically, given a directory "m" and an object in "m/obj.o " an
invocation with CWD==m:
```
llvm-ar rcTs ../m.a obj.o
```
Will create a maformed archive. Binutils does not have any issue with this.
The following command, executed with CWD==m/.. works:
```
llvm-ar rcTs m.a m/obj.o
```
The trick used in this commit is to put the source files in a different
directory than the object files and compile from there.
- add init_schedstatistics function to be called after
auto_init, that way xtimer_is init is called before
the first call to xtimer_now
- register schedstatics code as a callback to be executed
on each sched_run()
Enable the handling of flashing `softdevice.hex` when flashing the firmware
for openocd.
However, for flashing, only the `hexfile` and `binfile` can currently be used.
The `elffile` is generated with local pages aligned to `0x10000` which makes
the program starting at `0x1f000` be flashed from `0x10000` with padding bytes
even if the `.text` section is indeed at `0x1f000`:
readelf --sections bin/nrf52dk/gnrc_networking.elf
...
[ 1] .text PROGBITS 0001f000 00f000 00f698 00 AX 0 0 16
...
readelf --segments bin/nrf52dk/gnrc_networking.elf
...
LOAD 0x000000 0x00010000 0x00010000 0x1e6a0 0x1e6a0 R E 0x10000
...
The padding bytes would go through `verify_image` in `openocd` so be expected
to not be overwritten but are by `softdevice.hex`
Using --nmagic at link time removes the local page alignement but would
need dedicated testing.
`examples/gnrc_networking_mac/udp.c` is a duplicate of the file in
`gnrc_networking`. However, while the latter moved along in code style
and static analysis, the first was left a bit at the wayside. This
change resyncs the two files.
This adds a new target "archive-check".
Thin archives should be created with relative paths so that archives created
in a build container are useful in the host. This check ensures there are no
absolute paths inside thin archives.
Normal, or thick archives contain a copy of the object code. Thin
archives, on the contrary, are just an index to the .o files.
This patch does two things:
1. Change ARFLAGS to enable the "T" options.
2. Call AR with all relative paths.
The second step is necessary because the build system handles all
absolute paths. If the index in the thin archive contains absolute
paths, archives created in docker are no usable outside, and moving
the objects breaks the archive.
If all arguments to AR are relative, the resulting archive contains
filenames *relative to the .a file* and nothing should break as long
as the relative location of the .a and .o remains unchanged.
Compilation time is unchanged, but disc usage is reduced by approximately
50%. These are the result of a full RIOT build:
| Thin Archive | no | yes | Savings (%) |
| -------------- | ------: | ----: | ----------- |
| pkg (10e6 KiB) | 1 790 | 905 | 49% |
| Non pkg | 71 | 71 | 1% |
| Total | 1 812 | 976 | 46 % |
