Hello @fws
Please refer to"MCUXpresso IDE SWO Trace Guide".
https://www.nxp.com/webapp/Download?colCode=MCUXPRESSO-SWO-TRACE&appType=license
This document describes how to use the SWO Trace functionality built into MCUXpresso IDE.
BR
Alice
Hello @fws
For the retarget_itm.c file, after downloading and installing the LinkServer, we can find it in the folder.
Sorry, there is no official guide on enabling SWO on the LPC17XX side.
BR
Alice