Connecting via RTT on Linux

To communicate via Real Time Transfer (RTT), connect your development kit via Universal Serial Bus (USB) and use SEGGER's J-Link RTT to establish a connection.

Note: SEGGER Embedded Studio (SES) natively supports RTT. If enabled, the monitor shows up when you start debugging. Alternatively, you can use SEGGER's J-Link RTT Viewer as described below.
SEGGER's J-Link RTT is part of the J-Link Software and Documentation Pack, which is available from SEGGER downloads.

To use J-Link RTT on Linux, complete the following steps:

  1. Enter JLinkExe -if SWD to set up the connection:
    you@yourcomputer:~$ JLinkExe -if SWD
    SEGGER J-Link Commander V5.10u (Compiled Mar 17 2016 19:06:22)
    DLL version V5.10u, compiled Mar 17 2016 19:06:19
    Connecting to J-Link via USB...O.K.
    Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 15 2016 18:03:17
    Hardware version: V1.00
    VTref = 3.300V
    Type "connect" to establish a target connection, '?' for help
  2. Enter connect at the prompt to establish the connection.
    JLinkExe will ask for additional information. You can accept the default values.
  3. From another terminal, start JLinkRTTClient.
RTT output is visible in the terminal that runs JLinkRTTClient.