A KT-link buffer clone supporting JTAG Serial Wire Debug is now available for Bus Blaster v2 pre-release testers. This should support the new 2-wire SWD debugging protocol when available in OpenOCD and urJTAG. The KT-link is the first FT2232-based JTAG debugger with support for the new SWD and SWV JTAG interface used on low pin […]
libswd is an open source library for the new 2-wire JTAG protocol called Serial Wire Debug. The developer is currently working to integrate it with OpenOCD and urJTAG. Most open source projects supporting SWD seem to be standardizing on the KT-link style FT2232 programmer. The CPLD on Bus Blaster v2 can imitate the KT-link buffer, […]
It’s easier to program CPLDs and FPGAs from the Bus Pirate with a new firmware and PC application. The Bus Pirate has done JTAG with OpenOCD for a long time. OpenOCD is usually overkill for a simple CPLD or FPGA project though, and many find it difficult to get started. Clear back in Bus Pirate […]
Nathan Fain and Vadik presented at the 27C3 Chaos Communications Congress held recently in Berlin, Germany, on a topic of interest to us all: JTAG/Serial/FLASH/PCB Embedded Reverse Engineering Tools and Techniques. Check out their webpage for full documentation and analysis.
Versaloon is a full-opensource platform for multiple applications, including a programmer, debugger, logic tester, logic analyzer and simple oscilloscope. It’s based on generic USB_TO_XXX protocol, which can support more than 10 kinds of interfaces including JTAG, SWD, SPI, IIC and so on. USB_TO_XXX is not only used to control these interfaces, but also it can […]
The Bus Pirate can be used as an ARM JTAG debugger with OpenOCD. Joby Taffey set up the OpenOCD/Bus Pirate tool chain, and used it to work with a Stellaris LM3S9B90 (ARM Cortex-M3). Get a Bus Pirate for $30, including worldwide shipping at Seeed Studio. Adafruit also has the Bus Pirate and probe cables in […]
Jrt posted some notes about using the Bus Pirate with OpenOCD: It does work – but it’s not slick or fast. If you want a cheap JTAG adapter for remote debugging or big flash writes, get an FTDI-2232 based one. But, it’ll be fine for fiddling with bootloaders or just interrogating hardware. We agree that […]
The Bus Pirate can program flash chips with flashrom and debug JTAG devices with OpenOCD, but it doesn’t do these things very fast. It was designed for human-speed interaction. The Bus Pirate is a good way to learn an EEPROM chip, but you eventually integrate the chip in a real circuit with actual code. In […]
The OpenOCD project accepted Michal Demin’s patch that adds Bus Pirate support to the popular open source JTAG debugging client. Read the tutorial here. Congratulations Michal!