MCX Microcontrollers中的主题 Re: RTT support on MCX-N9XX-EVK does not work.

RTT support on MCX-N9XX-EVK does not work.

threeboystech — Tue, 10 Dec 2024 23:07:48 GMT

I've included the following SEGGER RTT files to my project, but the RTT Viewer does not seem to work. Can anyone provide a reason as to why?

SEGGER_RTT_Syscalls_GCC.c

SEGGER_RTT.c

SEGGER_RTT.h

SEGGER_RTT_ASM_ARMv7M.S

SEGGER_RTT_Conf.h

SEGGER_RTT_printf.c

Re: RTT support on MCX-N9XX-EVK does not work.

Harry_Zhang — Thu, 12 Dec 2024 06:18:15 GMT

Hi @threeboystech

When you add RTT related files.

You should check the _SEGGER_RTT Link Address in .map file.

And when you open the J-Link RTT Viewer.

Please input _SEGGER_RTT Link Address.

Harry

Re: RTT support on MCX-N9XX-EVK does not work.

threeboystech — Thu, 12 Dec 2024 18:13:28 GMT

I did find that I do need the call: SEGGER_RTT_Init()

Thanks!

Re: RTT support on MCX-N9XX-EVK does not work.

henrychenc — Wed, 13 Aug 2025 10:53:34 GMT

Hi @Harry_Zhang ,

MCXN235 also havs this issue, after building project, the segger_rtt.o ram address will be changed, how to let Jlink RTT viewer auto detection the address.

or how can the segger_rtt.o be fixed at a specific RAM address? Thanks！