1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
|
README
^^^^^^
o Installation
- Installing Cygwin
- Download and Unpack
- Semi-Optional apps/ Package
- Installation Directories with Spaces in the Path
- Notes about Header Files
o Configuring NuttX
- Instantiating "Canned" Configurations
- NuttX Configuration Tool
o Toolchains
- Cross-Development Toolchains
- NuttX Buildroot Toolchain
o Shells
o Building NuttX
- Building
- Re-building
- Build Targets and Options
o Cygwin Build Problems
- Strange Path Problems
- Window Native Toolchain Issues
o Documentation
INSTALLATION
^^^^^^^^^^^^
Installing Cygwin
-----------------
NuttX may be installed and built on a Linux system or on a Windows
system if Cygwin is installed. Installing Cygwin on your Windows PC
is simple, but time consuming. See http://www.cygwin.com/ for
installation instructions. Basically you just need to download a
tiny setup.exe program and it does the real, internet installation
for you.
Some Cygwin installation tips:
1. Install at C:\cygwin
2. Install EVERYTHING: "Only the minimal base packages from the
Cygwin distribution are installed by default. Clicking on categories
and packages in the setup.exe package installation screen will
provide you with the ability to control what is installed or updated.
Clicking on the "Default" field next to the "All" category will
provide you with the opportunity to install every Cygwin package.
Be advised that this will download and install hundreds of megabytes
to your computer."
If you use the "default" installation, you will be missing many
of the Cygwin utilities that you will need to build NuttX. The
build will fail in numerous places because of missing packages.
After installing Cygwin, you will get lots of links for installed
tools and shells. I use the RXVT native shell. It is fast and reliable
and does not require you to run the Cygwin X server (which is neither
fast nor reliable). The rest of these instructions assume that you
are at a bash command line prompt in either Linux or in Cygwin shell.
Download and Unpack
-------------------
Download and unpack the NuttX tarball. If you are reading this, then
you have probably already done that. After unpacking, you will end
up with a directory called nuttx-version (where version is the NuttX
version number). You might want to rename that directory nuttx to
match the various instructions in the documentation and some scripts
in the source tree.
Semi-Optional apps/ Package
---------------------------
All NuttX libraries and example code used to be in included within
the NuttX source tree. As of NuttX-6.0, this application code was
moved into a separate tarball, the apps tarball. If you are just
beginning with NuttX, then you will want to download the versioned
apps tarball along with the NuttX tarball. If you already have your
own product application directory, then you may not need the apps
tarball.
It is call "Semi-optional" because if you don't have some apps/
directory, NuttX will *fail* to build!
Download the unpack the apps tarball in the same directly where you
unpacked the NuttX tarball. After you unpack the apps tarball, you
will have a new directory called apps-version (where the version
should exactly match the version of the NuttX tarball). Again, you
might want to rename the directory to simply apps/ to match what
you read in the documentation
After unpacking the apps tarball, you will have two directories side
by side like this:
|
+----+----+
| |
nuttx/ apps/
This is important because the NuttX build will expect to find the
apps directory in that (default) location. )That default location
can be changed by editing your NuttX configuration file, but that
is another story).
Installation Directories with Spaces in the Path
------------------------------------------------
The nuttx build directory should reside in a path that contains no
spaces in any higher level directory name. For example, under
Cygwin, your home directory might be formed from your first and last
names like: "/home/First Last". That will cause strange errors when
the make system tries to build.
[Actually, that problem is probably not to difficult to fix. Some
Makefiles probably just need some paths within double quotes]
I work around spaces in the home directory name, by creating a
new directory that does not contain any spaces, such as /home/nuttx.
Then I install NuttX in /home/nuttx and always build from
/home/nuttx/nuttx-code.
Notes about Header Files
------------------------
Other C-Library Header Files.
Some toolchains are built with header files extracted from a C-library
distribution (such as newlib). These header files must *not* be used
with NuttX because NuttX provides its own, built-in C-Library. For
toolchains that do include built-in header files from a foreign C-
Library, NuttX must be compiled without using the standard header files
that are distributed with your toolchain. This prevents including
conflicting, incompatible header files (such as stdio.h).
Header Files Provided by Your Toolchain.
Certain header files, such as setjmp.h, stdarg.h, and math.h, may still
be needed from your toolchain and your compiler may not, however, be able
to find these if you compile NuttX without using standard header file.
If that is the case, one solution is to copy those header file from
your toolchain into the NuttX include directory.
Duplicated Header Files.
There are also a few header files that can be found in the nuttx/include
directory which are duplicated by the header files from your toolchain.
stdint.h and stdbool.h are examples. If you prefer to use the stdint.h
and stdbool.h header files from your toolchain, those could be copied
into the nuttx/include/ directory. Using most other header files from
your toolchain would probably cause errors.
math.h
Even though you should not use a foreign C-Library, you may still need
to use other, external libraries with NuttX. In particular, you may
need to use the math library, libm.a. NuttX supports a generic, built-in
math library that can be enabled using CONFIG_LIBM=y. However, you may
still want to use a higher performance external math library that has
been tuned for your CPU. Sometimes such such tuned math libraries are
bundled with your toolchain.
The math libary header file, math.h, is a then special case. If you do
nothing, the standard math.h header file that is provided with your
toolchain will be used.
If you have a custom, architecture specific math.h header file, then
that header file should be placed at arch/<cpu>/include/math.h. There
is a stub math.h header file located at include/nuttx/math.h. This stub
header file can be used to "redirect" the inclusion to an architecture-
specific math.h header file. If you add an architecture specific math.h
header file then you should also define CONFIG_ARCH_MATH_H=y in your
NuttX Configuration file. If CONFIG_ARCH_MATH_H is selected, then the
top-level Makefile will copy the stub math.h header file from
include/nuttx/matn.h to include/math.h where it will become the system
math.h header file. The stub math.h header file does nothing other
than to include that archicture-specific math.h header file as the
system math.h header file.
float.h
If you enable the generic, built-in math library, then that math library
will expect your toolchain to provide the standard float.h header file.
The float.h header file defines the properties of your floating point
implementation. It would always be best to use your toolchain's float.h
header file but if none is avaiable, a default float.h header file will
provided if this option is selected. However, there is no assurance that
the settings in this float.h are actually correct for your platform!
stdarg.h
In most cases, the correct version of stdarg.h is the version provided with your toolchain. However, sometimes there are issues with with using your toolchains stdarg.h. For example, it may attempt to draw in header files that do not exist in NuttX or perhaps the header files that is uses are not compatible with the NuttX header files. In those cases, you can use an architecture-specific stdarg.h header file by defining CONFIG_ARCH_STDARG_H=y.
See the discussion above for the math.h header. This setting works exactly
the same for the stdarg.h header file.
CONFIGURING NUTTX
^^^^^^^^^^^^^^^^^
Instantiating "Canned" Configurations
-------------------------------------
"Canned" NuttX configuration files are retained in:
configs/<board-name>/<config-dir>
Where <board-name> is the name of your development board and <config-dir>.
Configuring NuttX requires only copying three files from the <config-dir>
to the directory where you installed NuttX (TOPDIR) (and sometimes one
additional file to the directory the NuttX application package (APPSDIR)):
Copy configs/<board-name>/<config-dir>/Make.def to ${TOPDIR}/Make.defs
Make.defs describes the rules needed by you tool chain to compile
and link code. You may need to modify this file to match the
specific needs of your toolchain.
Copy configs/<board-name>/<config-dir>/setenv.sh to ${TOPDIR}/setenv.sh
setenv.sh is an optional convenience file that I use to set
the PATH variable to the toolchain binaries. You may chose to
use setenv.sh or not. If you use it, then it may need to be
modified to include the path to your toolchain binaries.
Copy configs/<board-name>/<config-dir>/defconfig to ${TOPDIR}/.config
The defconfig file holds the actual build configuration. This
file is included by all other make files to determine what is
included in the build and what is not. This file is also used
to generate a C configuration header at include/nuttx/config.h.
Copy configs/<board-name>/<config-dir>/appconfig to ${APPSDIR}/.config
The appconfig file describes the applications that need to be
built in the appliction directory (APPSDIR). Not all configurations
have an appconfig file. This file is deprecated and will not be
used with new defconfig files produced with the mconf configuration
tool.
General information about configuring NuttX can be found in:
${TOPDIR}/configs/README.txt
${TOPDIR}/configs/<board-name>/README.txt
There is a configuration script in the tools/ directory that makes this
easier. It is used as follows:
cd ${TOPDIR}/tools
./configure.sh <board-name>/<config-dir>
NuttX Configuration Tool
------------------------
An automated tool is under development to support re-configuration
of NuttX. This tool, however, is not yet quite ready for general
usage.
This automated tool is based on the kconfig-frontends application
available at http://ymorin.is-a-geek.org/projects/kconfig-frontends
(A snapshot of this tool is also available at ../misc/tools). This
application provides a tool called 'mconf' that is used by the NuttX
top-level Makefile. The following make target is provided:
make menuconfig
This make target will bring up NuttX configuration menus. The
'menuconfig' target depends on two things:
1. The Kconfig configuration data files that appear in almost all
NuttX directories. These data files are the part that is still
under development (patches are welcome!). The Kconfig files
contain configuration information for the configuration settings
relevant to the directory in which the Kconfig file resides.
NOTE: For a description of the syntax of this configuration file,
see ../misc/tools/kconfig-language.txt.
2. The 'mconf' tool. 'mconf' is part of the kconfig-frontends
package. You can download that package from the website
http://ymorin.is-a-geek.org/projects/kconfig-frontends or you
can use the snapshot in ../misc/tools.
Building may be as simple as 'configure; make; make install'
but there may be some build complexities, especially if you
are building under Cygwin. See the more detailed build
instructions at ../misc/tools/README.txt
The 'make install' step will, by default, install the 'mconf'
tool at /usr/local/bin/mconf. Where ever you choose to
install 'mconf', make certain that your PATH variable includes
a path to that installation directory.
TOOLCHAINS
^^^^^^^^^^
Cross-Development Toolchains
----------------------------
In order to build NuttX for your board, you will have to obtain a cross-
compiler to generate code for your target CPU. For each board,
configuration, there is a README.txt file (at configs/<board-name>/README.txt).
That README file contains suggestions and information about appropriate
tools and development environments for use with your board.
In any case, the script, setenv.sh that was deposited in the top-
level directory when NuttX was configured should be edited to set
the path to where you installed the toolchain. The use of setenv.sh
is optional but can save a lot of confusion in the future.
NuttX Buildroot Toolchain
-------------------------
For many configurations, a DIY set of tools is available for NuttX. These
tools can be downloaded from the NuttX SourceForge file repository. After
unpacking the buildroot tarball, you can find instructions for building
the tools in the buildroot/configs/README.txt file.
Check the README.txt file in the configuration director for your board
to see if you can use the buildroot toolchain with your board (this
README.txt file is located in configs/<board-name>/README.txt).
This toolchain is available for both the Linux and Cygwin development
environments.
Advantages: (1) NuttX header files are built into the tool chain,
and (2) related support tools like NXFLAT tools and the ROMFS
genromfs tools can be built into your toolchain.
Disadvantages: This tool chain is not was well supported as some other
toolchains. GNU tools are not my priority and so the buildroot tools
often get behind. For example, the is still no EABI support in the
NuttX buildroot toolchain for ARM.
SHELLS
^^^^^^
The NuttX build relies on some shell scripts. Some are inline in the
Makefiles and many are exectuble scripts in the tools/. directory. The
scripts were all developed using bash and many contain bash shell
dependencies.
Most of the scripts begin with #!/bin/bash to specifically select the
bash shell. Some still have #!/bin/sh but I haven't heard any complaints
so these must not have bash dependencies.
There are two shell issues that I have heard of:
1. Linux where /bin/sh refers to an incompatible shell (like ksh or csh).
In this case, bash is probably avaiable and the #!/bin/bash at the
beginning of the file should do the job. If any scripts with #!/bin/sh
fail, try changing that ti #!/bin/bash and let me know about the change.
2. FreeBSD with the Bourne Shell and no bash shell.
The other, reverse case has also been reported on FreeBSD setups that
have the Bourne shell, but not bash. In this base, #!/bin/bash fails
but #!/bin/sh works okay. My recommendation in this case is to create
a symbolic link at /bin/bash that refers to the Bourne shell.
There may still be issues, however, with certain the bash-centric scripts
that will require modifications.
BUILDING NUTTX
^^^^^^^^^^^^^^
Building
--------
NuttX builds in-place in the source tree. You do not need to create
any special build directories. Assuming that your Make.defs is setup
properly for your tool chain and that setenv.sh contains the path to where
your cross-development tools are installed, the following steps are all that
are required to build NuttX:
cd ${TOPDIR}
. ./setenv.sh
make
At least one configuration (eagle100) requires additional command line
arguments on the make command. Read ${TOPDIR}/configs/<board-name>/README.txt
to see if that applies to your target.
Re-building
-----------
Re-building is normally simple -- just type make again.
But there are some things that can "get you" when you use the Cygwin
development environment with Windows native tools. The native Windows
tools do not understand Cygwin's symbolic links, so the NuttX make system
does something weird: It copies the configuration directories instead of
linking to them (it could, perhaps, use the NTFS 'mklink' command, but it
doesn't).
A consequence of this is that you can easily get confused when you edit
a file in one of the linked (i.e., copied) directories, re-build NuttX,
and then not see your changes when you run the program. That is because
build is still using the version of the file in the copied directory, not
your modified file! To work around this annoying behavior, do the
following when you re-build:
make clean_context all
This 'make' command will remove of the copied directories, re-copy them,
then make NuttX.
Build Targets and Options
-------------------------
Build Targets:
Below is a summary of the build targets available in the top-level
NuttX Makefile:
all
The default target builds the NuttX executable in the selected output
formats.
clean
Removes derived object files, archives, executables, and temporary
files, but retains the configuration and context files and directories.
distclean
Does 'clean' then also removes all configuration and context files.
This essentially restores the directory structure to its original,
unconfigured stated.
Application housekeeping targets. The APPDIR variable refers to the user
application directory. A sample apps/ directory is included with NuttX,
however, this is not treated as part of NuttX and may be replaced with a
different application directory. For the most part, the application
directory is treated like any other build directory in the Makefile script.
However, as a convenience, the following targets are included to support
housekeeping functions in the user application directory from the NuttX
build directory.
apps_clean
Perform the clean operation only in the user application directory
apps_distclean
Perform the distclean operation only in the user application directory.
The apps/.config file is preserved so that this is not a "full" distclean
but more of a configuration "reset."
export
The export target will package the NuttX libraries and header files into
an exportable package. Caveats: (1) These needs some extension for the KERNEL
build. (2) The logic in tools/mkexport.sh only supports GCC and, for example,
explicitly assumes that the archiver is 'ar'
download
This is a helper target that will rebuild NuttX and download it to the target
system in one step. The operation of this target depends completely upon
implementation of the DOWNLOAD command in the user Make.defs file. It will
generate an error an error if the DOWNLOAD command is not defined.
The following targets are used internally by the make logic but can be invoked
from the command under certain conditions if necessary.
depend
Create build dependencies. (NOTE: There is currently no support for build
dependencies under Cygwin using Windows-native toolchains.)
context
The context target is invoked on each target build to assure that NuttX is
properly configured. The basic configuration steps include creation of the
the config.h and version.h header files in the include/nuttx directory and
the establishment of symbolic links to configured directories.
clean_context
This is part of the distclean target. It removes all of the header files
and symbolic links created by the context target.
Build Options:
Of course, the value any make variable an be overriden from the make command
line. However, there is one particular variable assignment option that may
be useful to you:
V=1
This is the build "verbosity flag." If you specify V=1 on the make command
line, you will see the exact commands used in the build. This can be very
useful when adding new boards or tracking down compile time errors and
warnings (Contributed by Richard Cochran).
CYGWIN BUILD PROBLEMS
^^^^^^^^^^^^^^^^^^^^^
Strange Path Problems
---------------------
If you see strange behavior when building under Cygwin then you may have
a problem with your PATH variable. For example, if you see failures to
locate files that are clearly present, that may mean that you are using
the wrong version of a tool. For example, you may not be using Cygwin's
'make' program at /usr/bin/make. Try:
$ which make
/usr/bin/make
When you install some toolchains (such as Yargarto or CodeSourcery tools),
they may modify your PATH variable to include a path to their binaries.
At that location, they make have GNUWin32 versions of the tools. So you
might actually be using a version of make that does not understand Cygwin
paths.
The solution is either:
1. Edit your PATH to remove the path to the GNUWin32 tools, or
2. Put /usr/local/bin, /usr/bin, and /bin at the front of your path:
$ export PATH=/usr/local/bin:/usr/bin:/bin:$PATH
Window Native Toolchain Issues
------------------------------
There are many popular Windows native toolchains that may be used with NuttX.
Examples include CodeSourcery (for Windows), devkitARM, and several vendor-
provied toolchains. There are several limitations with using a and Windows
based toolchain in a Cygwin environment. The three biggest are:
1. The Windows toolchain cannot follow Cygwin paths. Path conversions are
performed automatically in the Cygwin makefiles using the 'cygpath' utility
but you might easily find some new path problems. If so, check out 'cygpath -w'
2. Windows toolchains cannot follow Cygwin symbolic links. Many symbolic links
are used in Nuttx (e.g., include/arch). The make system works around these
problems for the Windows tools by copying directories instead of linking them.
But this can also cause some confusion for you: For example, you may edit
a file in a "linked" directory and find that your changes had no effect.
That is because you are building the copy of the file in the "fake" symbolic
directory. If you use a Windows toolchain, you should get in the habit of
making like this:
make clean_context all
An alias in your .bashrc file might make that less painful. The rebuild
is not a long as you might think because there is no dependency checking
if you are using a native Windows toolchain. That bring us to #3:
3. Dependencies are not made when using Windows versions of the GCC. This is
because the dependencies are generated using Windows pathes which do not
work with the Cygwin make.
Support has been added for making dependencies with the windows-native toolchains.
That support can be enabled by modifying your Make.defs file as follows:
- MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+ MKDEP = $(TOPDIR)/tools/mkdeps.sh --winpaths "$(TOPDIR)"
If you have problems with the dependency build (for example, if you are not
building on C:), then you may need to modify tools/mkdeps.sh
General Pre-built Toolchain Issues
To continue with the list of "Window Native Toolchain Issues" we can add
the following. These, however, are really just issues that you will have
if you use any pre-built toolchain (vs. building the NuttX toolchain from
the NuttX buildroot package):
There may be incompatibilities with header files, libraries, and compiler
built-in functions at detailed below. For the most part, these issues
are handled in the existing make logic. But if you are breaking new ground,
then you may incounter these:
4. Header Files. Most pre-built toolchains will build with a foreign C
library (usually newlib, but maybe uClibc or glibc if you are using a
Linux toolchain). This means that the header files from the foreign
C library will be built into the toolchain. So if you "include <stdio.h>",
you will get the stdio.h from the incompatible, foreign C library and
not the nuttx stdio.h (at nuttx/include/stdio.h) that you wanted.
This can cause really confusion in the buildds and you must always be
sure the -nostdinc is included in the CFLAGS. That will assure that
you take the include files only from
5. Libraries. What was said above header files applies to libraries.
You do not want to include code from the libraries of any foreign
C libraries built into your toolchain. If this happens you will get
perplexing errors about undefined sysmbols. To avoid these errors,
you will need to add -nostdlib to your CFLAGS flags to assure that
you only take code from the NuttX libraries.
This, however, may causes other issues for libraries in the toolchain
that you do want (like libgcc.a or libm.a). These are special-cased
in most Makefiles, but you could still run into issues of missing
libraries.
6. Built-Ins. Some compilers target a particular operating system.
Many people would, for example, like to use the same toolchain to
develop Linux and NuttX software. Compilers built for other
operating systems may generate incompatible built-in logic and,
for this reason, -fno-builtin should also be included in your
C flags
And finally you may not be able to use NXFLAT.
7. NXFLAT. If you use a pre-built toolchain, you will lose all support
for NXFLAT. NXFLAT is a binary format described in
Documentation/NuttXNxFlat.html. It may be possible to build
standalone versions of the NXFLAT tools; there are a few examples
of this in the misc/buildroot/configs directory. However, it
is possible that there could be interoperability issues with
your toolchain since they will be using different versions of
binutials and possibly different ABIs.
DOCUMENTATION
^^^^^^^^^^^^^
Additional information can be found in the Documentation/ directory and
also in README files that are scattered throughout the source tree. The
documentation is in HTML and can be access by loading the following file
into your Web browser:
Documentation/index.html
NuttX documentation is also available online at http://www.nuttx.org.
Below is a guide to the available README files in the NuttX source tree:
nuttx
|
|- arch/
| |
| |- arm/
| | `- src
| | `- lpc214x/README.txt
| |- avr/
| | `- README.txt
| |- sh/
| | |- include/
| | | |-m16c/README.txt
| | | |-sh1/README.txt
| | | `-README.txt
| | |- src/
| | | |-common/README.txt
| | | |-m16c/README.txt
| | | |-sh1/README.txt
| | | `-README.txt
| |- x86/
| | |- include/
| | | `-README.txt
| | `- src/
| | `-README.txt
| `- z80/
| | `- src/
| | `- z80/README.txt
| `- README.txt
|- configs/
| |- amber/
| | `- README.txt
| |- avr32dev1/
| | `- README.txt
| |- c5471evm/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- compal_e88
| | `- README.txt
| |- compal_e99
| | `- README.txt
| |- demo0s12ne64/
| | `- README.txt
| |- ea3131/
| | `- README.txt
| |- ea3152/
| | `- README.txt
| |- eagle100/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- ekk-lm3s9b96/
| | `- README.txt
| |- ez80f910200kitg/
| | |- ostest/README.txt
| | `- README.txt
| |- ez80f910200zco/
| | |- dhcpd/README.txt
| | |- httpd/README.txt
| | |- nettest/README.txt
| | |- nsh/README.txt
| | |- ostest/README.txt
| | |- poll/README.txt
| | `- README.txt
| |- fire-stm32v2/
| | `- README.txt
| |- hymini-stm32v/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- lincoln60/
| | `- README.txt
| |- kwikstik-k40/
| | `- README.txt
| |- lm3s6432-s2e/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- lm3s6965-ek/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- lm3s8962-ek/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- lpcxpresso-lpc1768/
| | `- README.txt
| |- lpc4330-xplorer/
| | `- README.txt
| |- m68332evb/
| | |- include/README.txt
| | `- src/README.txt
| |- mbed/
| | `- README.txt
| |- mcu123-lpc214x/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- micropendous3/
| | `- README.txt
| |- mirtoo/
| | `- README.txt
| |- mx1ads/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- ne63badge/
| | `- README.txt
| |- ntosd-dm320/
| | |- doc/README.txt
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- nucleus2g/
| | `- README.txt
| |- olimex-lpc1766stk/
| | `- README.txt
| |- olimex-lpc2378/
| | |- include/README.txt
| | `- README.txt
| |- olimex-strp711/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- pcblogic-pic32mx/
| | `- README.txt
| |- pic32-starterkit/
| | `- README.txt
| |- pjrc-8051/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- qemu-i486/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- rgmp/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- sam3u-ek/
| | `- README.txt
| |- sim/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- shenzhou/
| | `- README.txt
| |- skp16c26/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- stm3210e-eval/
| | |- include/README.txt
| | |- RIDE/README.txt
| | |- src/README.txt
| | `- README.txt
| |- stm3220g-eval/
| | `- README.txt
| |- stm3240g-eval/
| | `- README.txt
| |- stm32f100rc_generic/
| | `- README.txt
| |- stm32f4discovery/
| | `- README.txt
| |- sure-pic32mx/
| | `- README.txt
| |- teensy/
| | `- README.txt
| |- twr-k60n512/
| | `- README.txt
| |- us7032evb1/
| | |- bin/README.txt
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- vsn/
| | |- src/README.txt
| | `- README.txt
| |- xtrs/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- z16f2800100zcog/
| | |- ostest/README.txt
| | |- pashello/README.txt
| | `- README.txt
| |- z80sim/
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
| |- z8encore000zco/
| | |- ostest/README.txt
| | `- README.txt
| |- z8f64200100kit/
| | |- ostest/README.txt
| | `- README.txt
| `- README.txt
|- drivers/
| |- lcd/
| | `- README.txt
| |- sercomm/
| | `- README.txt
| |- syslog/
| | `- README.txt
| `- README.txt
|- fs/
| |- mmap/
| | `- README.txt
| `- nxffs/
| `- README.txt
|- graphics/
| `- README.txt
|- lib/
| `- README.txt
|- libc/
| `- README.txt
|- libxx/
| `- README.txt
|- mm/
| `- README.txt
|- syscall/
| `- README.txt
`- tools/
`- README.txt
apps
|- examples/
| |- json/README.txt
| |- pashello/README.txt
| `- README.txt
|- graphics/
| `- tiff/README.txt
|- interpreters/
| |- ficl
| | `- README.txt
| `- README.txt
|- modbus/
| `- README.txt
|- netutils/
| |- discover
| | `- README.txt
| |- ftpc
| | `- README.txt
| |- json
| | `- README.txt
| |- telnetd
| | `- README.txt
| `- README.txt
|- nshlib/
| `- README.txt
|- NxWidgets/
| `- README.txt
|- system/
| |- i2c/README.txt
| |- free/README.txt
| |- install
| | `- README.txt
| |- poweroff
| | `- README.txt
| |- ramtron
| | `- README.txt
| |- sdcard
| | `- README.txt
| `- sysinfo
| `- README.txt
`- README.txt
NxWidgets
|- Doxygen
| `- README.txt
|- tools
| `- README.txt
|- UnitTests
| `- README.txt
`- README.txt
|