Free and Open On-Chip Debugging, In-System Programming
and Boundary-Scan Testing
- Copyright (c) 2004, 2005, 2006 Dominic Rath
+ 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 /
1. JTAG hardware
-Currently, OpenOCD supports three types of JTAG interfaces:
+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
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
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,
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
2. Supported cores
-This version of openocd supports the following 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 (PXA25x, PXA27x and IXP4xx) is currently being
-developed.
+Support for Intel XScale CPUs is also included:
-The OpenOCD is only tested with little-endian targets, but support for
-big-endian is planned. If you're interested in helping with this (and you
-happen to have a big-endian ARM7/ARM9 system, feel free to contact
-Dominic.Rath <at> gmx.de.
+- PXA25x
+- PXA27x
+- IXP42x
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, x86-64-Linux and
-(though it's not fully working yet) PowerPC OS-X.
+to run on Windows/Cygwin, native Windows with MinGW, FreeBSD, IA64-Linux,
+AMD64-Linux, Alpha-Linux, ARM-Linux, and PowerPC OS-X.
4. Documentation
projects / fw / openocd / blobdiff