Tigard 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.
It pairs very well with the BitMagic Basic Logic Analyzer. You can connect the BitMagic to Tigard through the built in Logic Analyzer port on the Tigard.
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 Support
In 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 kid's toy you've taken apart
Use I²C to interact with an OLED display, while concurrently observing the transactions with a BitMagic logic analyzer over the LA port
Mykola
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