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About

OpenOCD was created by Dominic Rath as part of a diploma thesis written at the University of Applied Sciences Augsburg (http://www.fh-augsburg.de). Since that time, the project has grown into an active open-source project, supported by a diverse community of software and hardware developers from around the world.

What is OpenOCD?

The Open On-Chip Debugger (OpenOCD) aims to provide debugging, in-system programming and boundary-scan testing for embedded target devices.

JTAG: OpenOCD uses a “hardware interface dongle” to communicate with the JTAG (IEEE 1149.1) compliant TAPs on your target board. A TAP is a “Test Access Port”, a module which processes special instructions and data. TAPs are daisy-chained within and between chips and boards.

Dongles: OpenOCD currently supports many types of hardware dongles: USB based, parallel port based, and other standalone boxes that run OpenOCD internally. See JTAG Hardware Dongles.

GDB Debug: It allows ARM7 (ARM7TDMI and ARM720t), ARM9 (ARM920T, ARM922T, ARM926EJ–S, ARM966E–S), XScale (PXA25x, IXP42x) and Cortex-M3 (Stellaris LM3 and ST STM32) based cores to be debugged via the GDB protocol.

Flash Programing: Flash writing is supported for external CFI compatible NOR flashes (Intel and AMD/Spansion command set) and several internal flashes (LPC1700, LPC2000, AT91SAM7, AT91SAM3U, STR7x, STR9x, LM3, and STM32x). Preliminary support for various NAND flash controllers (LPC3180, Orion, S3C24xx, more) controller is included.

OpenOCD Web Site

The OpenOCD web site provides the latest public news from the community:

http://openocd.berlios.de/web/

Latest User's Guide:

The user's guide you are now reading may not be the latest one available. A version for more recent code may be available. Its HTML form is published irregularly at:

http://openocd.berlios.de/doc/html/index.html

PDF form is likewise published at:

http://openocd.berlios.de/doc/pdf/openocd.pdf

OpenOCD User's Forum

There is an OpenOCD forum (phpBB) hosted by SparkFun, which might be helpful to you. Note that if you want anything to come to the attention of developers, you should post it to the OpenOCD Developer Mailing List instead of this forum.

http://forum.sparkfun.com/viewforum.php?f=18