Bus Blaster v4 is an experimental, high-speed JTAG debugger from Dangerous Prototypes. Thanks to a reprogrammable buffer, a simple update over USB makes Bus Blaster compatible with many different JTAG debugger types in the most popular open source software.

Features

• Based on FT2232H with high-speed USB 2.0
• Buffered interface works with 3.3volt to 1.8volt targets
• Reprogrammable buffer is compatible with multiple debugger types
• Compatible with 'jtagkey', 'KT-link' programmer settings in OpenOCD,
• urJTAG, and more
• ships with JTAGkey compatible buffer image pre-programmed
• Should support Serial Wire Debug when available
• Mini-CPLD development board: self programmable, extra CPLD pins to header
• Open source (CC-BY-SA)

Updates in v4

• V4 uses a larger CPLD than previous versions. It can now support the SWV feature of Cortex microcontroller for advance debugging when software support is available
• SWV is little used and not currently supported in software, most users will be better off with Bus Blaster v3 available here
• Fitted in a DP9056 (90x56 mm) standard PCB
• Added series resistors to input and output pins to protect against damage and noise#

This open source hardware and software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.