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Welcome to OpenOCD! =================== OpenOCD provides on-chip programming and debugging support with a layered architecture of JTAG interface and TAP support, debug target support (e.g. ARM, MIPS), and flash chip drivers (e.g. CFI, NAND, etc.). Several network interfaces are available for interactiving with OpenOCD: HTTP, telnet, TCL, and GDB. The GDB server enables OpenOCD to function as a "remote target" for source-level debugging of embedded systems using the GNU GDB program. This README file contains an overview of the following topics: - how to find and build more OpenOCD documentation, - the build process - packaging tips. - configuration options ===================== OpenOCD Documentation ===================== In addition to in-tree documentation, the latest documentation may be viewed on-line at the following URLs: OpenOCD User's Guide: http://openocd.sourceforge.net/doc/html/index.html OpenOCD Developer's Manual: http://openocd.sourceforge.net/doc/doxygen/html/index.html These reflect the latest development versions, so the following section introduces how to build the complete documentation from the package. For more information, refer to these documents or contact the developers by subscribing to the OpenOCD developer mailing list: openocd-devel@lists.sourceforge.net Building the OpenOCD Documentation ---------------------------------- The OpenOCD User's Guide can be produced in two different format: # If PDFVIEWER is set, this creates and views the PDF User Guide. make pdf && ${PDFVIEWER} doc/openocd.pdf # If HTMLVIEWER is set, this creates and views the HTML User Guide. make html && ${HTMLVIEWER} doc/openocd.html/index.html The OpenOCD Developer Manual contains information about the internal architecture and other details about the code: # NB! make sure doxygen is installed, type doxygen --version make doxygen # If HTMLVIEWER is set, this views the HTML Doxygen output. ${HTMLVIEWER} doxygen/index.html The remaining sections describe how to configure the system such that you can build the in-tree documentation. ================== Installing OpenOCD ================== On Linux, you may have permissions problems to address. The best way to do this is to use the contrib/openocd.udev rules file. It probably belongs somewhere in /etc/udev/rules.d, but consult your operating system documentation to be sure. In particular, make sure that it matches the syntax used by your operating system's version of udev. A Note to OpenOCD Users ----------------------- If you would rather be working "with" OpenOCD rather than "on" it, your operating system or JTAG interface supplier may provide binaries for you in a convenient-enough package. Such packages may be more stable than git mainline, where bleeding-edge development takes place. These "Packagers" produce binary releases of OpenOCD after the developers produces new "release" versions of the source code. Previous versions of OpenOCD cannot be used to diagnose problems with the current release, so users are encouraged to keep in contact with their distribution package maintainers or interface vendors to ensure suitable upgrades appear regularly. Users of these binary versions of OpenOCD must contact their Packager to ask for support or newer versions of the binaries; the OpenOCD developers do not support packages directly. A Note to OpenOCD Packagers --------------------------- You are a PACKAGER of OpenOCD if you: - Sell dongles: and include pre-built binaries - Supply tools: A complete development solution - Supply IDEs: like Eclipse, or RHIDE, etc. - Build packages: RPM files, or DEB files for a Linux Distro As a PACKAGER, you will experience first reports of most issues. When you fix those problems for your users, your solution may help prevent hundreds (if not thousands) of other questions from other users. If something does not work for you, please work to inform the OpenOCD developers know how to improve the system or documentation to avoid future problems, and follow-up to help us ensure the issue will be fully resolved in our future releases. That said, the OpenOCD developers would also like you to follow a few suggestions: - Send patches, including config files, upstream. - Always build with printer ports enabled. - Use libftdi + libusb for FT2232 support. Remember, the FTD2XX library cannot be used in binary distributions, due to restrictions of the GPL v2. ================ Building OpenOCD ================ The INSTALL file contains generic instructions for running 'configure' and compiling the OpenOCD source code. That file is provided by default for all GNU automake packages. If you are not familiar with the GNU autotools, then you should read those instructions first. The remainder of this document tries to provide some instructions for those looking for a quick-install. OpenOCD Dependencies -------------------- Presently, GCC is required to build OpenOCD. The developers have begun to enforce strict code warnings (-Wall, -Werror, -Wextra, and more) and use C99-specific features: inline functions, named initializers, mixing declarations with code, and other tricks. While it may be possible to use other compilers, they must be somewhat modern and could require extending support to conditionally remove GCC-specific extensions. Also, you need to install the appropriate driver files, if you want to build support for a USB or FTDI-based interface: - ft2232, jlink, rlink, vsllink, usbprog, arm-jtag-ew: - libusb: required for portable communication with USB dongles - ft2232 also requires: - libftdi: http://www.intra2net.com/opensource/ftdi/ *OR* - ftd2xx: http://www.ftdichip.com/Drivers/D2XX.htm, or the Amontec version (from http://www.amontec.com), for easier support of JTAGkey's vendor and product IDs. Many Linux distributions provide these packages through their automated installation and update mechanisms; however, some Linux versions include older versions of libftdi. In particular, using Ubuntu 8.04 has been problematic, but newer versions of Ubuntu do not have this problem. Compiling OpenOCD ----------------- To build OpenOCD (on both Linux and Cygwin), use the following sequence of commands: ./configure [with some options listed in the next section] make make install The 'configure' step generates the Makefiles required to build OpenOCD, usually with one or more options provided to it. The first 'make' step will build OpenOCD and place the final executable in ./src/. The final (optional) step, ``make install'', places all of the files in the required location. Cross-Compiling Options ----------------------- To cross-compile, you must specify both --build and --host options to the 'configure' script. For example, you can configure OpenOCD to cross-compile on a x86 Linux host to run on Windows (MinGW32), you could use the following configuration options: ./configure --build=i686-pc-linux-gnu --host=i586-mingw32msvc ... Likewise, the following options allow OpenOCD to be cross-compiled for an ARM target on the same x86 host: ./configure --build=i686-pc-linux-gnu --host=arm-elf ... Both must be specified to work around bugs in autoconf. Scripts for producing ARM cross-compilers can be found on the web with a little searching. A script to produce an x86 Linux-hosted MinGW32 cross-compiler can be downloaded from the following URL: http://www.mingw.org/wiki/LinuxCrossMinGW Configuration Options --------------------- The configure script takes numerous options, specifying which JTAG interfaces should be included (among other things). The following list of options was extracted from the output of './configure --help'. Other options may be available there: --enable-maintainer-mode enable make rules and dependencies not useful (and sometimes confusing) to the casual installer NOTE: This option is *required* for GIT builds! It should *not* be used to build a release. --enable-dummy Enable building the dummy JTAG port driver --enable-parport Enable building the pc parallel port driver --disable-parport-ppdev Disable use of ppdev (/dev/parportN) for parport (for x86 only) --enable-parport-giveio Enable use of giveio for parport (for CygWin only) --enable-ft2232_libftdi Enable building support for FT2232 based devices using the libftdi driver, opensource alternate of FTD2XX --enable-ft2232_ftd2xx Enable building support for FT2232 based devices using the FTD2XX driver from ftdichip.com --enable-usb_blaster_libftdi Enable building support for the Altera USB-Blaster using the libftdi driver, opensource alternate of FTD2XX --enable-usb_blaster_ftd2xx Enable building support for the Altera USB-Blaster using the FTD2XX driver from ftdichip.com --enable-amtjtagaccel Enable building the Amontec JTAG-Accelerator driver --enable-zy1000-master Use ZY1000 JTAG master registers --enable-zy1000 Enable ZY1000 interface --enable-ioutil Enable ioutil functions - useful for standalone OpenOCD implementations --enable-ep93xx Enable building support for EP93xx based SBCs --enable-at91rm9200 Enable building support for AT91RM9200 based SBCs --enable-gw16012 Enable building support for the Gateworks GW16012 JTAG Programmer --enable-presto_libftdi Enable building support for ASIX Presto Programmer using the libftdi driver --enable-presto_ftd2xx Enable building support for ASIX Presto Programmer using the FTD2XX driver --enable-usbprog Enable building support for the usbprog JTAG Programmer --enable-oocd_trace Enable building support for some prototype OpenOCD+trace ETM capture hardware --enable-jlink Enable building support for the Segger J-Link JTAG Programmer --enable-vsllink Enable building support for the Versaloon-Link JTAG Programmer --enable-rlink Enable building support for the Raisonance RLink JTAG Programmer --enable-ulink Enable building support for the Keil ULINK JTAG Programmer --enable-arm-jtag-ew Enable building support for the Olimex ARM-JTAG-EW Programmer --enable-buspirate Enable building support for the Buspirate --enable-stlink Enable building support for the ST-Link JTAG Programmer --enable-osbdm Enable building support for the OSBDM (JTAG only) Programmer --enable-opendous Enable building support for the estick/opendous JTAG Programmer --enable-minidriver-dummy Enable the dummy minidriver. --disable-internal-jimtcl Disable building internal jimtcl --enable-libusb0 Use libusb-0.1 library for USB JTAG devices --enable-remote-bitbang Enable building support for the Remote Bitbang jtag driver --disable-doxygen-html Disable building Doxygen manual as HTML. --enable-doxygen-pdf Enable building Doxygen manual as PDF. Miscellaneous Configure Options ------------------------------- The following additional options may also be useful: --disable-assert turn off assertions --enable-verbose Enable verbose JTAG I/O messages (for debugging). --enable-verbose-jtag-io Enable verbose JTAG I/O messages (for debugging). --enable-verbose-usb-io Enable verbose USB I/O messages (for debugging) --enable-verbose-usb-comms Enable verbose USB communication messages (for debugging) --enable-malloc-logging Include free space in logging messages (requires malloc.h). --disable-gccwarnings Disable extra gcc warnings during build. --disable-wextra Disable extra compiler warnings --disable-werror Do not treat warnings as errors --disable-option-checking Ignore unrecognized --enable and --with options. --disable-dependency-tracking speeds up one-time build --enable-shared[=PKGS] build shared libraries [default=no] --enable-static[=PKGS] build static libraries [default=yes] Parallel Port Dongles --------------------- If you want to access the parallel port using the PPDEV interface you have to specify both --enable-parport AND --enable-parport-ppdev, since the the later option is an option to the parport driver (see http://forum.sparkfun.com/viewtopic.php?t=3795 for more info). The same is true for the --enable-parport-giveio option, you have to use both the --enable-parport AND the --enable-parport-giveio option if you want to use giveio instead of ioperm parallel port access method. FT2232C Based USB Dongles ------------------------- There are 2 methods of using the FTD2232, either (1) using the FTDICHIP.COM closed source driver, or (2) the open (and free) driver libftdi. Using LIBFTDI ------------- The libftdi source code can be download from the following website: http://www.intra2net.com/en/developer/libftdi/download.php For both Linux and Windows, both libusb and libftdi must be built and installed. To use the newer FT2232H chips, supporting RTCK and USB high speed (480 Mbps), use libftdi version 0.17 or newer. Many Linux distributions provide suitable packages for these libraries. For Windows, libftdi is supported with versions 0.14 and later. With these prerequisites met, configure the libftdi solution like this: ./configure --prefix=/path/for/your/install --enable-ft2232_libftdi Then type ``make'', and perhaps ``make install''. Using FTDI's FTD2XX ------------------- The (closed source) FTDICHIP.COM solution is faster on MS-Windows. That is the motivation for supporting it even though its licensing restricts it to non-redistributable OpenOCD binaries, and it is not available for all operating systems used with OpenOCD. You may, however, build such copies for personal use. The FTDICHIP drivers come as either a (win32) ZIP file, or a (Linux) TAR.GZ file. You must unpack them ``some where'' convenient. As of this writing FTDICHIP does not supply means to install these files "in an appropriate place." If your distribution does not package these, there are several './configure' options to solve this problem: --with-ftd2xx-win32-zipdir Where (CYGWIN/MINGW) the zip file from ftdichip.com was unpacked <default=search> --with-ftd2xx-linux-tardir Where (Linux/Unix) the tar file from ftdichip.com was unpacked <default=search> --with-ftd2xx-lib Use static or shared ftd2xx libs on default static If you are using the FTDICHIP.COM driver, download and unpack the Windows or Linux FTD2xx drivers from the following location: http://www.ftdichip.com/Drivers/D2XX.htm Remember, this library is binary-only, while OpenOCD is licenced according to GNU GPLv2 without any exceptions. That means that _distributing_ copies of OpenOCD built with the FTDI code would violate the OpenOCD licensing terms. Linux Notes *********** The Linux tar.gz archive contains a directory named libftd2xx0.4.16 (or similar). Assuming that you have extracted this archive in the same directory as the OpenOCD package, you could configure with options like the following: ./configure \ --enable-ft2232_ftd2xx \ --with-ft2xx-linux-tardir=../libftd2xx0.4.16 \ ... other options ... Note that on Linux there is no good reason to use these FTDI binaries; they are no faster (on Linux) than libftdi, and cause licensing issues. ========================== Obtaining OpenOCD From GIT ========================== You can download the current GIT version with a GIT client of your choice from the main repository: git://openocd.git.sourceforge.net/gitroot/openocd/openocd You may prefer to use a mirror: http://repo.or.cz/r/openocd.git git://repo.or.cz/openocd.git Using the GIT command line client, you might use the following command to set up a local copy of the current repository (make sure there is no directory called "openocd" in the current directory): git clone git://openocd.git.sourceforge.net/gitroot/openocd/openocd Then you can update that at your convenience using git pull There is also a gitweb interface, which you can use either to browse the repository or to download arbitrary snapshots using HTTP: http://openocd.git.sourceforge.net/git/gitweb.cgi?p=openocd/openocd http://repo.or.cz/w/openocd.git Snapshots are compressed tarballs of the source tree, about 1.3 MBytes each at this writing. Tips For Building From a GIT Repository --------------------------------------- Building OpenOCD from a repository requires a recent version of the GNU autotools (autoconf >= 2.59 and automake >= 1.9). 1) Run './bootstrap' to create the 'configure' script and prepare the build process for your host system. 2) Run './configure --enable-maintainer-mode' with other options.
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