Can I use RTT print in the application upgraded by SBSFU?

[James Shih]

Hi,

I'm working on the project which used RTT print as the debug interface and now integrated with SBSFU to enable the firmware upgrade capability, but after that I noticed somehow the internal flash been erased after I launched the RTTViewer and connected to my J-Link, so would like to know if there is the protection there to erase the flash when enable the SWD access?

[Jocelyn RICARD]

Hello James,

I don't know this tool but if it uses SWD interface, I would suggest deactivating all the traces.

Now, why the flash was erased, I'm not able to tell you why.

Normally, only reason would be that application content in flash was modified in some way.

If this is detected by SBSFU, the content is erased.

Best regards

Jocelyn