forked from Archive/PX4-Autopilot
304 lines
12 KiB
Plaintext
304 lines
12 KiB
Plaintext
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tools/README.txt
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^^^^^^^^^^^^^^^^
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This README file addresses the contents of the NuttX tools/ directory.
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The tools/ directory contains miscellaneous scripts and host C programs
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that are necessary parts of the the NuttX build system. These files
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include:
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README.txt
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This file
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configure.sh
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This is a bash script that is used to configure NuttX for a given
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target board. See configs/README.txt or Documentation/NuttxPortingGuide.html
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for a description of how to configure NuttX with this script.
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mkconfig.c, cfgparser.c, and cfgparser.h
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This is C file that is used to build mkconfig program. The mkconfig
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program is used during the initial NuttX build.
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When you configure NuttX, you will copy a configuration file called .config
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in the top level NuttX directory (See configs/README.txt or
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Documentation/NuttxPortingGuide.html). The first time you make NuttX,
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the top-level makefile will build the mkconfig executable from mkconfig.c
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(using Makefile.host). The top-level Makefile will then execute the
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mkconfig program to convert the .config file in the top level directory
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into include/nuttx/config.h. config.h is a another version of the
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NuttX configuration that can be included by C files.
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mkexport.sh and Makefile.export
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These implement part of the top-level Makefile's 'export' target. That
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target will bundle up all of the NuttX libraries, header files, and the
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startup object into an export-able, binary NuttX distribution. The
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Makefile.export is used only by the mkexport.sh script to parse out
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options from the top-level Make.defs file.
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mkversion.c, cfgparser.c, and cfgparser.h
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This is C file that is used to build mkversion program. The mkversion
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program is used during the initial NuttX build.
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When you build NuttX there should be a version file called .version in
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the top level NuttX directory (See Documentation/NuttxPortingGuide.html).
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The first time you make NuttX, the top-level makefile will build th
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mkversion executable from mkversion.c (using Makefile.host). The top-
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level Makefile will then execute the mkversion program to convert the
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.version file in the top level directory into include/nuttx/version.h.
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version.h provides version information that can be included by C files.
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mksyscall.c
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This is a C file that is used to build mksyscall program. The mksyscall
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program is used during the initial NuttX build by the logic in the top-
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level syscall/ directory.
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If you build NuttX as a separately compiled, monolithic kernel and separate
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applications, then there is a syscall layer that is used to get from the
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user application space to the NuttX kernel space. In the user application
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"proxies" for each of the kernel functions are provided. The proxies have
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the same function signature as the kernel function, but only execute a
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system call.
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Within the kernel, there are "stubs" for each of the system calls. The
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stubs receive the marshalled system call data, and perform the actually
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kernel function call (in kernel-mode) on behalf of the proxy function.
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Information about the stubs and proxies is maintained in a comma separated
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value (CSV) file in the syscall/ directory. The mksyscall program will
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accept this CVS file as input and generate all of the required proxy or
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stub files as output. See syscall/README.txt for additonal information.
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bdf-convert.c
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This C file is used to build the bdf-converter program. The bdf-converter
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program be used to convert fonts in Bitmap Distribution Format (BDF)
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into fonts that can be used in the NX graphics system.
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Below are general instructions for creating and installing a new font
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in the NX graphic system:
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1. Locate a font in BDF format,
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2. Use the bdf-converter program to convert the BDF font to the NuttX
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font format. This will result in a C header file containing
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defintions. That header file should be installed at, for example,
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graphics/nxfonts/nxfonts_myfont.h.
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Create a new NuttX configuration variable. For example, suppose
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you define the following variable: CONFIG_NXFONT_MYFONT. Then
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you would need to:
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3. Define CONFIG_NXFONT_MYFONT=y in your NuttX configuration file.
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A font ID number has to be assigned for each new font. The font ID
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is defined in the file include/nuttx/nx/nxfonts.h. Those definitions
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have to be extended to support your new font. Look at how the font ID
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enabled by CONFIG_NXFONT_SANS23X27 is defined and add an ID for your
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new font in a similar fashion:
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4. include/nuttx/nx/nxfonts.h. Add you new font as a possible system
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default font:
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#if defined(CONFIG_NXFONT_SANS23X27)
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# define NXFONT_DEFAULT FONTID_SANS23X27
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#elif defined(CONFIG_NXFONT_MYFONT)
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# define NXFONT_DEFAULT FONTID_MYFONT
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#endif
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Then define the actual font ID. Make sure that the font ID value
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is unique:
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enum nx_fontid_e
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{
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FONTID_DEFAULT = 0 /* The default font */
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#ifdef CONFIG_NXFONT_SANS23X27
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, FONTID_SANS23X27 = 1 /* The 23x27 sans serif font */
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#endif
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#ifdef CONFIG_NXFONT_MYFONT
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, FONTID_MYFONT = 2 /* My shiny, new font */
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#endif
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...
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New Add the font to the NX build system. There are several files that
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you have to modify to to this. Look how the build system uses the
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font CONFIG_NXFONT_SANS23X27 for examaples:
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5. nuttx/graphics/Makefile. This file needs logic to auto-generate
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a C source file from the header file that you generated with the
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the bdf-converter program. Notice NXFONTS_FONTID=2; this must be
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set to the same font ID value that you defined in the
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include/nuttx/nx/nxfonts.h file.
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genfontsources:
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ifeq ($(CONFIG_NXFONT_SANS23X27),y)
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@$(MAKE) -C nxfonts -f Makefile.sources TOPDIR=$(TOPDIR) NXFONTS_FONTID=1 EXTRADEFINES=$(EXTRADEFINES)
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endif
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ifeq ($(CONFIG_NXFONT_MYFONT),y)
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@$(MAKE) -C nxfonts -f Makefile.sources TOPDIR=$(TOPDIR) NXFONTS_FONTID=2 EXTRADEFINES=$(EXTRADEFINES)
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endif
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6. nuttx/graphics/nxfonts/Make.defs. Set the make variable NXFSET_CSRCS.
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NXFSET_CSRCS determines the name of the font C file to build when
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NXFONTS_FONTID=2:
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ifeq ($(CONFIG_NXFONT_SANS23X27),y)
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NXFSET_CSRCS += nxfonts_bitmaps_sans23x27.c
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endif
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ifeq ($(CONFIG_NXFONT_MYFONT),y)
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NXFSET_CSRCS += nxfonts_bitmaps_myfont.c
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endif
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7. nuttx/graphics/nxfonts/Makefile.sources. This is the Makefile used
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in step 5 that will actually generate the font C file. So, given
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your NXFONTS_FONTID=2, it needs to determine a prefix to use for
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auto-generated variable and function names and (again) the name of
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the autogenerated file to create (this must be the same name that
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was used in nuttx/graphics/nxfonts/Make.defs):
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ifeq ($(NXFONTS_FONTID),1)
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NXFONTS_PREFIX := g_sans23x27_
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GEN_CSRC = nxfonts_bitmaps_sans23x27.c
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endif
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ifeq ($(NXFONTS_FONTID),2)
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NXFONTS_PREFIX := g_myfont_
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GEN_CSRC = nxfonts_bitmaps_myfont.c
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endif
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8. graphics/nxfonts/nxfonts_bitmaps.c. This is the file that contains
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the generic font structures. It is used as a "template" file by
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nuttx/graphics/nxfonts/Makefile.sources to create your customized
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font data set.
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#if NXFONTS_FONTID == 1
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# include "nxfonts_sans23x27.h"
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#elif NXFONTS_FONTID == 2
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# include "nxfonts_myfont.h"
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#else
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# error "No font ID specified"
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#endif
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Where nxfonts_myfont.h is the NuttX font file that we generated in
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step 2 using the bdf-converter tool.
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9. graphics/nxfonts/nxfonts_getfont.c. Finally, we need to extend the
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logic that does the run-time font lookups so that can find our new
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font. The lookup function is NXHANDLE nxf_getfonthandle(enum nx_fontid_e fontid).
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The new font information needs to be added to data structures used by
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that function:
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#ifdef CONFIG_NXFONT_SANS23X27
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extern const struct nx_fontpackage_s g_sans23x27_package;
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#endif
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#ifdef CONFIG_NXFONT_MYFONT
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extern const struct nx_fontpackage_s g_myfont_package;
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#endif
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static FAR const struct nx_fontpackage_s *g_fontpackages[] =
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{
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#ifdef CONFIG_NXFONT_SANS23X27
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&g_sans23x27_package,
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#endif
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#ifdef CONFIG_NXFONT_MYFONT
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&g_myfont_package,
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#endif
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NULL
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};
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Makefile.host
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This is the makefile that is used to make the mkconfig program from
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the mkconfig.c C file, the mkversion program from the mkconfig.c C file,
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or the mksyscall program from the mksyscall.c file.
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mkromfsimg.sh
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This script may be used to automate the generate of a ROMFS file system
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image. It accepts an rcS script "template" and generates and image that
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may be mounted under /etc in the NuttX pseudo file system.
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mkdeps.sh
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mknulldeps.sh
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NuttX uses the GCC compilers capabilities to create Makefile dependencies.
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The bash script mkdeps.sh is used to run GCC in order to create the
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dependencies. If a NuttX configuration uses the GCC toolchain, its Make.defs
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file (see configs/README.txt) will include a line like:
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MKDEP = $(TOPDIR)/tools/mkdeps.sh
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If the NuttX configuration does not use a GCC compatible toolchain, then
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it cannot use the dependencies and instead it uses mknulldeps.sh:
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MKDEP = $(TOPDIR)/tools/mknulldeps.sh
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The mknulldeps.sh is a stub script that does essentially nothing.
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define.sh
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Different compilers have different conventions for specifying pre-
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processor definitions on the compiler command line. This bash
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script allows the build system to create create command line definitions
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without concern for the particular compiler in use.
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incdir.sh
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Different compilers have different conventions for specifying lists
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of include file paths on the the compiler command line. This bash
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script allows the build system to create include file paths without
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concern for the particular compiler in use.
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link.sh
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winlink.sh
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unlink.sh
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Different file system have different capabilities for symbolic links.
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Some windows file systems have no native support for symbolic links.
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Cygwin running under windows has special links built in that work with
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all cygwin tools. However, they do not work when Windows native tools
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are used with cygwin. In that case something different must be done.
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If you are building under Linux or under cygwin with a cygwin tool
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chain, then your Make.defs file may have definitions like the
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following:
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DIRLINK = $(TOPDIR)/tools/link.sh
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DIRUNLINK = (TOPDIR)/tools/unlink.sh
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The first definition is not always present because link.sh is the
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default. link.sh is a bash script that performs a normal, Linux-style
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symbolic link; unlink.sh is a do-it-all unlinking script.
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But if you are building under cygwin using a Windows native toolchain,
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then you will need something like the following in you Make.defs file:
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DIRLINK = $(TOPDIR)/tools/winlink.sh
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DIRUNLINK = (TOPDIR)/tools/unlink.sh
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winlink.sh will copy the whole directory instead of linking it.
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NOTE: I have been told that some NuttX users have been able to build
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successfully using the GnuWin32 tools and modifying the link.sh
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script so that it uses the NTFS mklink command. But I have never
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tried that
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mkimage.sh
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The creates a downloadable image as needed with the rrload bootloader.
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indent.sh
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This script can be used to indent .c and .h files in a manner similar
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to my coding NuttX coding style. It doesn't do a really good job,
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however (see the comments at the top of the indent.sh file).
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zipme.sh
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I use this script to create the nuttx-xx.yy.tar.gz tarballs for
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release on SourceForge. It is handy because it also does the
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kind of clean that you need to do to make a clean code release.
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