Hydev

This is an old revision of the document!

---

# JTAG access

## Overview

As detailed on the Schematic (released in the FCC documents), the Nabaztag:tag board breaks out the JTAG port. Let's see how to use it to access the CPU to be able to flash and debug some code !

## Hardware

### Nabaztag:tag

Well, of course you need a Nabaztag:tag ( a version 2 ). You also must be ready to open it.

Grab a small flat screwdriver and remove the four screws on the base. You can also use a triangle screwdriver if you happen to have one, I don't.

And this is about it. the JTAG header is on the top left corner of the board.

Pinout is the following (top to bottom):

## Software: OpenOCD

### Pacth and compile

### Usage

## Pictures

## Links