PX4 uses NuttX data structures throughout so those data structures
were preserved and used to implement high and low priority queues.

A unit test for the work queues was added.

The polling rate of the queues are set in px4_config.h in
CONFIG_SCHED_WORKPERIOD. The units are milliseconds.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

if only uorb is called with no other args it crashes.

Handle the case where no args are passed.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Now run:

make PX4_TARGET_OS=nuttx

or

make PX4_TARGET_OS=linux

To test the linux build and make sure that the required directories
exist, run:

make linuxrun

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Based on NuttX work queue code.

Not yet functional.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Import copies of work queue releated filed from NuttX.

These are the original files.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Create and open I2C virtual device and support I2C_RDWR ioctl

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The src/platform/linux/tests modules were commented out in the
config file.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

LDFLAGS was missing -pthread

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Added linker script to resolve __param_start and __param_end.

Added mc_att_control to list of supported builtins.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Thread based implementaton can't call errx or exit

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The builtin commands all have _main suffix by convention so
no need to show _main. Also nsh calls the commmands without the
_main suffix.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

If the topic has not been published, orb_copy returns a
negative number which causes update() to memset the data
contents to zero.

In some instances data is a null pointer. This causes a
segment violation crash.

Added a check for data != 0

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

I2C class derives from CDev class which requires a devname
but in at least some instances, a nullptr is passed for devname.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

When printing a uint64_t type using %llu, this works on a 32bit
system, but on a 64bit machine uint64_t is an unsigned long.

The compiler complains about unmatching types.

The time times in PX4 should likely have been unsigned long long
and not uint64_t as that type changes per architecture.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

For now it uses the bus number as the id. Not sure how this should
actually be mapped.

Seems like the I2C devices come up in random order and have random
id but that a specific device can be found in the /sys/bus/i2c
interface.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Running the blinkm device to test I2C

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

if termios.h is included before mathlib.h then BO is undefined.
Since mathlib.h is not needed it was removed but I still don't
know why this error occurs.

Also added -lrt to link flags for clock_gettime

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Removed hardcoded requirement to use gcc

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

PX4 will not build with gcc-4.6.

If you are running Ubuntu 12.04 still (you poor old sod) follow the directions at

http://ubuntuhandbook.org/index.php/2013/08/install-gcc-4-8-via-ppa-in-ubuntu-12-04-13-04/

to install gcc-4.8.1

Alternatively you can install clang 3.4.1 for Ubuntu 12.04 from

http://llvm.org/releases/3.4.1/clang+llvm-3.4.1-x86_64-unknown-ubuntu12.04.tar.xz



Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Not yet functional. Full implementation will provide an IOCTL interface to
do bi-directional transfer. will model the interface after Linux.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

When running the process without sufficient privilege to use
real time scheduling, warn the user and run with SCHED_OTHER.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

ms5611 uses getopt to parse args but the static variable
optind was not being properly updated.

Replaced use of external getopt call with simple parser;

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Also fixed naming of mavlink files for NuttX build.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

- Missing static declarations for functions not used outside a file.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Fixed bug with missing quote in #error found by gcc 4.9.1

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Added more queue support to linux/px4_layer.

Use virt char devices for ms5611, and mavlink.

Added more HRT functionality. uORB latency test
now fails. Likely due to bad HRT impl for Linux.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The dataman module now works under linux using /tmp/dataman as the
file path. Two files from NuttX were added to the Linux impl for
single linked queue handling.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

uORB module now compiles and runs for Linux using the
virtual CDev implementation.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The previous name implied some kind of daemon. AppState is
aggregated state of an application's running state and interfaces
to request app termination, and check app state.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The High Resilution Timer functions are stubbed out for now.

Certain queue functions are required to compile uORB so adding
the queue.c from NuttX.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Moved posix-like functions to vcdev_posix.cpp and updated the
copyright notice.

Added test case to make sure poll unblocks when a write occurs.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>