nuttx

History

Mateusz Szafoni 8416d9a966 Merged in raiden00/nuttx (pull request #668 ) Master * libdsp: initial commit * libdsp: cosmetics * stm32f334-disco/buckboost: use a PID controller from libdsp * stm32_adc.h: fix typo * stm32_dac.c: set OUTEN bit for DAC1CH2 and DAC2CH1 * stm32_hrtim: cosmetic changes * power/motor: direction parameter is now int8 + add overload fault * libdsp: all floats with f-sufix libdsp: add precision option for library libdsp: add debug option for library and assertions in functions libdsp: add current samples correction for SVM3 libds: add some motor control specific functions libdsp: add basic speed observer libdsp: fix phase shift in SMO observer libdsp: add more logic to FOC config/sim/dsptest: add dsptest configuration * libdsp/lib_motor.c: remove unused comparation * libdsp/lib_observer.c: update some comments Approved-by: GregoryN <gnutt@nuttx.org>		2018-07-07 17:04:57 +00:00
..
libc	Trivial updates from review of vecto I/O logic.	2018-06-23 09:01:42 -06:00
libdsp	Merged in raiden00/nuttx (pull request #668 )	2018-07-07 17:04:57 +00:00
libnx	This commit moves all of the libraries under a common directory called libs/. This most certainly break libcxx and uClibc++ for now.	2018-05-29 13:21:26 -06:00
libxx	This commit moves all of the libraries under a common directory called libs/. This most certainly break libcxx and uClibc++ for now.	2018-05-29 13:21:26 -06:00
README.txt	tools: Missed a couple of changes of libcxx to libxx.	2018-05-29 18:16:43 -06:00

README.txt

README
======

This directory holds NuttX libraries.  Libraries in NuttX are very special
creatures.  The have these properties:

1. They can be shared by both application logic and logic within the OS when
   using the FLAT build.

2. But in PROTECTED and KERNEL modes, they must be built differently:  The
   copies used by applications and the OS cannot be the same.  Rather,
   separate versions of libraries must be built for the kernel and for
   applications.

3. When used by the OS, some special care must be taken to assure that the
   OS logic does not disrupt the user's errno value and that the OS does
   not create inappropriate cancellation points.
 
   For example, sem_wait() is both a cancellation point and modifies the
   errno value.  So within the FLAT build and without kernel version for
   the PROTECTED and KERNEL builds, the special internal OS interface
   nxsem_wait() must be used.  Within libraries, the macro  _SEM_WAIT()
   (as defined in include/nuttx/semaphore.h) is used instead.  The
   definition of this macro accounts for the different usage environments.

NOTE:  The libraries under libs/ build differently from other NuttX
components:  There are no build-related files in the libs/ directory; it
is simply a container for other well-known, individual library directories.
The upper level Makefile logic is aware of the libraries within the libs/
container.

The only real function of the libs/ directory is to prevent the top-level
directory from becoming cluttered with individual libraries.