I wanted to use OpenOCD with my Nexys 3 FPGA devboard. The Reference Manual1 states that it has an on-board USB controller that is connected to the JTAG lines. In this post, we will (hopefully) make it work under Linux with OpenOCD, so that I can debug softcores in …

So I was experimenting with FPGA softcores and was wanting to debug the MicroBlaze core. I used a Xilinx Spartan 6 board from Digilent (Nexys 3) and found the built in Xilinx ISE debugger very basic. I then researched that the XMD server (Xilinx Microprocessor Debugger) actually serves as a …