UM08001 J-Link / J-Trace User Guide

This is the user documentation for owners of SEGGER debug probes, J-Link and J-Trace. This manual documents the software which with the J-Link Software and Documentation Package as well as advanced features of J-Link and J-Trace, like Real Time Transfer ( RTT), J-Link Script Files or Trace.

Note: This wiki page is work in progress. Until this wiki page is finished, please refer to UM08001.pdf.

J-Link User Guide

J-Link software and documentation package

Software overview

The J-Link Software and Documentation Package, which is available for download from segger.com, includes some applications to be used with J-Link.
It also comes with USB-drivers for J-Link and documentations in pdf format.

Software	Description
J-Link Commander	Command-line tool with basic functionality for target analysis.
J-Link GDB Server	The J-Link GDB Server is a server connecting to the GNU Debugger (GDB) via TCP/IP. It is required for toolchains using the GDB protocol to connect to J-Link.
J-Link GDB Server command line version	Command line version of the J-Link GDB Server. Same functionality as the GUI version.
J-Link Remote Server	Utility which provides the possibility to use J-Link / J-Trace remotely via TCP/IP.
J-Mem	Target memory viewer. Shows the memory content of a running target and allows editing as well.
J-Flash [1]	Stand-alone flash programming application. For more information about J-Flash please refer to J-Flash ARM User’s Guide (UM08003).
J-Flash Lite	Stand-alone flash programming application. Reduced feature set of J-Flash.
J-Link RTT Viewer	Free-of-charge utility for J-Link. Displays the terminal output of the target using RTT. Can be used in parallel with a debugger or stand-alone.
J-Link SWO Viewer	Free-of-charge utility for J-Link. Displays the terminal output of the target using the SWO pin. Can be used in parallel with a debugger or stand-alone.
J-Link SWO Analyzer	Command line tool that analyzes SWO RAW output and stores it into a file.
JTAGLoad	Command line tool that opens an svf file and sends the data init via J-Link / J-Trace to the target.
J-Link Configurator	GUI-based configuration tool for J-Link. Allows configuration of USB identification as well as TCP/IP identification of J-Link.
RDI support[1]	Provides Remote Debug Interface (RDI) support. This allows the user to use J-Link with any RDI-compliant debugger.
Processor specific tools	Free command-line tools for handling specific processors. Included are: STR9 Commander and STM32 Unlock.

¹: Full-featured J-Link (PLUS, PRO, ULTRA+) or an additional license for J-Link base model required.

JRun

TBD

Command line options

TBD

Working with J-Link and J-Trace

J-Link WiFi setup

J-Link WiFi can be set up in multiple ways.

1) Using J-Link Commander:

• Connect J-Link WiFi to your computer via USB
• Start J-Link Commander (JLink.exe)
• Set up the SSID of your wireless network with the following command: SetWifi SSID <your_wifi_ssid>
• Set up the password to your wireleass network with the following command: SetWifi Pass <your_wifi_password>
• After a few seconds, J-Link WiFi should be connected to your wireless network (the green WiFi LED should be always on).

To get the IP address:

• After performing the steps listed above, issue the following command in J-Link Commander: USB
• J-Link WiFi will reconnect via USB and provide its IP address, e.g.: IP-Addr: 10.1.1.114 (DHCP)
• When connecting to J-Link WiFi later on via IP, use this IP address to establish the connection

2) Using J-Link Configurator:

• Connect J-Link WiFi to your computer via USB
• Start J-Link Configurator (JLinkConfig.exe)
• Right-click on the J-Link WiFi in the list of connected J-Links and select 'Configure'
• In the WiFi configuration section, enter the SSID and the password of your wireless network
• Click OK
• Unplug and reconnect your J-Link WiFi
• Click OK
• After a few seconds, J-Link WiFi should be connected to your wireless network (the green WiFi LED should be always on).

To get the IP address:

• Start J-Link Commander (JLink.exe)
• J-Link WiFi will connect via USB and provide its IP address, e.g.: IP-Addr: 10.1.1.114 (DHCP)
• When connecting to J-Link WiFi later on via IP, use this IP address to establish the connection

J-Link WiFi in J-Link Configurator

JLink WiFi will only be shown in the Configurator if connected via USB. This is because the Configurator uses UDP broadcast packets to find J-Links in the network. However, most routers have UDP broadcast and UDP multicast packets disabled for WiFi networks.

Semihosting

TBD

Enabling semihosting in J-Link GDBServer

TBD