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

[threeboystech]

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

[threeboystech]

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

Thanks!

[Harry_Zhang · Accepted solution]

Hi @threeboystech 

When you add RTT related files.

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

Harry_Zhang_0-1733984204818.png

And when you open the J-Link RTT Viewer.

Harry_Zhang_1-1733984238399.png

Please input _SEGGER_RTT Link Address.

BR

Harry

[henrychenc]

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！