OpenOCD Free and Open On-Chip Debugging, In-System Programming and Boundary-Scan Testing Copyright (c) 2004-2007 Dominic Rath The debugger uses an IEEE 1149-1 compliant JTAG TAP bus master to access on-chip debug functionality available on ARM7 and ARM9 based microcontrollers / system-on-chip solutions. User interaction is realized through a telnet command line interface and a gdb (The GNU Debugger) remote protocol server. 1. JTAG hardware Currently, OpenOCD supports the following JTAG interfaces: - Parallel port wigglers. These devices connect to a PC's parallel port, providing direct access to the JTAG lines. The OpenOCD contains descriptions of a few Wiggler layouts, including the original 'Wiggler' design. Other layouts (i.e. mapping of parallel port pins to JTAG lines) can be added easily. Typical Wiggler speeds are around 12kByte/s code download to an ARM7's RAM. The list of supported parallel port devices includes: * Macraigor Wiggler JTAG cable * Gateworks GW16012 JTAG programmer * Xilinx DLC5 JTAG parallel cable III * Ka-Ro TRITON starterkit II JTAG cable * Lattice parallel port JTAG cable * ST FlashLINK programming cable - The Amontec JTAG Accelerator. This is a configuration for Amontec's Chameleon dongle, a parallel port interface based on a Xilinx CoolRunner CPLD. It uses the IEEE1284 EPP parallel port specification, providing many times the performance achievable with wiggler-style devices. Additional information is available on www.amontec.com. Typical JTAG Accelerator speeds are around 120-160kByte/s to an ARM7's RAM. - FTDI FT2232 based USB devices. The FT2232 (but not FT232 or FT245) features a multi-protocol synchronous serial engine (MPSSE) that can be used to run the serial JTAG protocol. There are several implemenations of FT2232 based devices: * USBJTAG: http://www.fh-augsburg.de/~hhoegl/proj/usbjtag/usbjtag.html The USBJTAG was designed by Prof. Hubert Hoegl to provide a high-speed USB interface for use with the OpenOCD. Schematics are available at the USBJTAG website, and a homebrew device can easily be built using the FTDI evaluation module DLP2232M. * OOCD-Link: http://www.joernonline.de/dw/doku.php?id=en:projects:oocdlink Similar to the USBJTAG, this design comes with free schematics, too. * Amontec JTAGkey: www.amontec.com The Amontec JTAGkey offers support for a wide variety of target voltages from 1.4V to 5V. It also allows the JTAG lines and reset signals to be tri-stated, allowing easy interfacing with a wide variety of targets. * Amontec JTAGkey-Tiny: www.amontec.com The Amontec JTAGkey offers support for a wide variety of target voltages from 2.8V to 5V. It also allows the reset signals to be tri-stated, allowing easy interfacing with a wide variety of targets. * Olimex ARM-USB-OCD: www.olimex.com The Olimex ARM-USB-OCD offers support for a wide vriety of target voltages from 2.0V to 5V. It also allows targets to be powered from the ARM-USB-OCD and features and additional RS232 UART. * eVerve Signalyzer: www.signalyzer.com The Signalyzer offers support for a wide variety of target voltages from 1.2V to 5.5V. A second connector provides access to a TTL level UART. * TinCanTools 'Flyswatter' USB JTAG programmer. * Turtelizer 2: http://www.ethernut.de/en/hardware/turtelizer/index.html Another USB JTAG programmer, with freely available schematics. It supports target voltages from 1.65V to 5.5V. * Hitex STR9-comSTICK: http://www.ehitex.de/p_info.php?products_id=292 A STR912FW44x microcontroller "board" with USB and JTAG functionality. * Luminary Micro development board evb_lm3s811 JTAG interface. * ASIX PRESTO: http://www.asix-tools.com/prg_presto.htm The ASIX PRESTO is a USB JTAG programmer for a wide range of components, e.g. microcontrollers, serial EEPROM and Flash memory chips, CPLDs and others. * usbprog: http://www.embedded-projects.net/index.php?page_id=165 The usbprog is a freely programmable USB adapter, which can (among other things) use a firmware which turns it into a JTAG programmer/debugger. All FT2232 based devices may be accessed using either FTDI's proprietary FTD2XX library (www.ftdichip.com) or using an open-source replacement from http://www.intra2net.com/de/produkte/opensource/ftdi/index.php, also included with many Linux distributions. 2. Supported cores This version of openocd supports the following ARM7/9 cores: - ARM7TDMI(-s) - ARM9TDMI - ARM920t - ARM922t - ARM926ej-s - ARM966e - Cortex-M3 Support for Intel XScale CPUs is also included: - PXA25x - PXA27x - IXP42x And support for the Marvell Feroceon CPU core as found in the Orion SoC family is included as well. 3. Host platforms OpenOCD was originally developed on x86-Linux, but has since then been ported to run on Windows/Cygwin, native Windows with MinGW, FreeBSD, IA64-Linux, AMD64-Linux, Alpha-Linux, ARM-Linux, and PowerPC OS-X. 4. Documentation Documentation for the OpenOCD is hosted in the Berlios OpenFacts Wiki at http://openfacts.berlios.de/index-en.phtml?title=Open_On-Chip_Debugger. There is also and openocd(1) manpage, the 'openocd --help' output and an OpenOCD info page (type 'info openocd'). 5. Licensing OpenOCD is licensed under the terms of the GNU General Public License, see the file COPYING for details.