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A Simple, Open Source Tool for Hardware HackingTigard is an open source FT2232H-based, multi-protocol, multi-voltage
tool for hardware hacking. By incorporating commonly used pin-outs, a
labelled wiring harness, onboard level-shifting, and a logic analyzer
connection, it is designed specifically for attaching to and
communicating with low-speed interfaces on reverse-engineered hardware
targets.
Tigard combines support for all of the most-used interfaces and
most-needed features on to a simple board. As a drop-in replacement
for dozens of other hardware tools based on FTDI chips, it has native
support from a number of commonly used hardware tools like OpenOCD,
FlashROM, and more.
There’s a wide range of more advanced hardware hacking tools
available. Tigard serves as an excellent complement to these by
supporting the 20% of the features that enable 80% of the common
hardware hacking tasks involved with speaking various
protocols. Whether you’re new to hardware hacking, or you just need a
quick and simple solution, Tigard is designed to be the best first
step - sometimes followed by a more capable tool, if needed.
Documentation and hardware files can be found in the
Tigard Tools GitHub repository.
Features & Specifications
USB Type C high-speed (480 Mbps) interface
FTDI FT2232HQ Dual High Speed USB to Multipurpose UART/FIFO IC
Primary port dedicated to UART including access to all flow control signals
Secondary port shared among dedicated headers for SWD, JTAG, SPI, and I²C
High-performance directional level-shifters for 1.8 to 5.5 V operation
Switch to choose between on-board 1.8 V, 3.3 V, 5.0 V, and off-board vTarget supplies
Switch to choose between SPI/JTAG and I²C/SWD modes
Logic analyzer (LA) port to observe device-level signals
Indicator lights to aid debugging
Software SupportIn general, Tigard was designed to work as-is with several tools and
libraries that already support the x232H family of chips. This
includes:
USB-Serial drivers for UART access
OpenOCD and UrJTAG for JTAG
Flashrom, PyFtdi/PySpiFlash, LibMPSSE, and other tools for SPI interfaces
LibMPSSE and PyFtdi/PyI2CFlash for I²C interfaces
Thanks to the drop-in compatibility with so many tools, there is no
need for Tigard-specific tools to interface with any targets. If you
do find the need to customize a tool or script using Tigard, it should
work fine with any other FT2232H interface board.
Example Use Cases
Attach to the serial console you find on a home automation device
Dump the contents of a SPI flash chip inside of a set top box
Use GDB over the JTAG pins to modify code in memory, allowing you to
bypass a login prompt you're connected to over the UART pins on a
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