There are two pieces of software we need to install in order to get debugging. First is a GDB server. When using the Arduino Zero, you'll need OpenOCD. OpenOCD is a tool to communicate with debug hardware tools such as the EDBG chip on the Arduino Zero. When using a JLink debugger, you'll use the JLink GDB server. GDB is the GNU Debugger which talks with OpenOCD to control and inspect the raw state of the microcontroller and, using the binary symbols, translate that info back into the source code realm.

GDB Server

Below we'll cover OpenOCD to work with the Arduino Zero. See here for more information on installing the JLink GDB Server.

OpenOCD

You can get OpenOCD from here. Below are quick start instructions.

Windows

Download and install the latest binary from here.

Mac OSX

Installation on Mac OSX is easiest using Homebrew. (If you don't have brew installed see here.)

brew install open-ocd 

Linux

For Ubuntu, install the ARM toolchain using the instructions in the Building CircuitPython Learn Guide. Other Linux distributions may have packages available. Here are some examples.

# Ubuntu, Debian, Raspbian, Mint sudo apt-get install openocd # http://packages.ubuntu.com/search?keywords=openocd&searchon=names # Fedora su -c 'yum install openocd' # https://apps.fedoraproject.org/packages/openocd # Arch pacman -S openocd # https://www.archlinux.org/packages/community/x86_64/openocd/ 

GDB

GDB is part of the larger ARM toolchain. So don't be surprised to see a number of arm-none-eabi-* binaries installed.

Windows

Download install the win32 executable from here.

Also make sure that you have 32-bit (x86 not x86-64) Python 2.7x installed from here. We'll be using Python to interpret the Micro Trace Buffer later.

Mac OSX

Installation on Mac OSX is easiest using Homebrew. (If you don't have brew installed see here.)

brew install --cask gcc-arm-embedded 

Linux

To install the arm gcc toolchain on Ubuntu following the instructions in the Building CircuitPython Learng Guide. Other distributions may have the toolchain available as a package, but check the Building Python Learn Guide for the correct version.

# Fedora su -c 'yum install arm-none-eabi-gdb' # https://apps.fedoraproject.org/packages/arm-none-eabi-gdb # Arch pacman -S arm-none-eabi-gdb # https://www.archlinux.org/packages/community/i686/arm-none-eabi-gdb/