JTAG (IEEE 1149.1, aka 'Boundary Scan' ) is a standard IC testing, debugging and programming port. No.Lib(X)SVF - A library for implementing SVF and XSVF JTAG players Lib(X)SVF - A library for implementing SVF and XSVF JTAG players There is absolutely no warranty for UrJTAG. Welcome to change it and/or distribute copies of it under certain conditions. UrJTAG is free software, covered by the GNU General Public License, and you are I am using Arch Linux, so let's install the software first and read the ID jtagĬopyright (C) 2007, 2008, 2009 Kolja Waschk and the respective authors Let's read the ID codes of both chips using original proprietary software, called Digilent Adept Runtime and Digilent Adept Utilities. The second chip ( xcf02s) is a flash memory (PROM). The first IC ( xc3s100e) is the actual FPGA chip from the Spartan 3E family. Here is the JTAG chain of the Digilent Basys2 FPGA board: Same goes for UM232H, so two boards are connected only using GND, TMS, TCK, TDI and TDO pins. Then I connected Basys2's JTAG pins to the breadboard:īasys2 has to be connected to the computer, since the power is taken from the USB port. By putting it on a breadboard I connected the following pins to enable self-powering mode and ensuring proper voltage levels: This chip has a single USB-to-UART converter and an MPSSE engine which implements JTAG protocol. I used a UM232H break-out board which has FT232H chip on it. Now we have all the pins necessary to connect an external JTAG adapter. My soldering skills are not really good, but I could solder a tiny red cable to the TMS pin: By tracing the routes on the PCB, I found where TMS's route changes the layer to the outermost one: Luckily, three of the JTAG pins are the same as the ISP pins: Flashing firmware on this microcontroller during assembly stage requires accessing in-system programmer (ISP) connector. The board has an internal JTAG programmer based on AT90USB162. I decided to solder the FTDI-based adapter to a Basys2 development board. There wasn't any chip available in my hands, so I had to experiment with existing hardware. I had a task to check whether OpenOCD can program a Spartan 3 series FPGA by means of FTDI-MPSSE-based JTAG adapter.

Ft232h jtag