356 CHAPTER 13 RTT
J-Link / J-Trace (UM08001) ©
2004-2017 SEGGER Microcontroller GmbH & Co. KG
13.1 Introduction
With RTT it is possible to output information from the target microcontroller as well
as sending input to the application at a very high speed without affecting the target's
real time behavior.
SEGGER RTT can be used with any J-Link model and any supported target processor
which allows background memory access, which are Cortex-M and RX targets.
RTT supports multiple channels in both directions, up to the host and down to the
target, which can be used for different purposes and provide the most possible free-
dom to the user.
The default implementation uses one channel per direction, which are meant for
printable terminal input and output. With the J-Link RTT Viewer this channel can be
used for multiple "virtual" terminals, allowing to print to multiple windows (e.g. one
for standard output, one for error output, one for debugging output) with just one
target buffer. An additional up (to host) channel can for example be used to send
profiling or event tracing data.
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