Output from app core, network core, and TF-M

[afok-esmart]

I wanted to try getting all 3 outputs on my nRF5340DK. I tried following the instructions here - https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/security/tfm.html#manual_connection_to_virtual_com_ports_on_the_nrf5340_dk. I am using the 2 VCOM ports by default i.e., I haven't changed their pins or setup. I have an FTDI connected to P0.25 and P0.26 that is reading the TF-M output.

But I am only able to get the app core output and TF-M output. To test this, I flashed the IPC service sample project (NCS v2.5.0, nrf/samples/ipc/ipc_service), and confirmed I can see app core and network core output. Then I flashed the TF-M secure peripheral sample project (NCS v2.5.0, nrf/samples/tfm/tfm_secure_peripheral), and the app core and TF-M output is as expected. But I don't see network core output (in this case, I would have expected to see the pkt rate/throughput info sent from the IPC sample project).

Anyone have suggestions for what I can investigate? Thanks in advance!

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EDIT #1 - I forgot to mention that the hardware is nRF5340DK 2.0.2 (as mentioned on the white sticker).

[dejans]

Hi,

Taking all 3 outputs on nrf5340-dk should be possible. This is how documentation describes the setup:

• If the non-secure application, network core and TF-M outputs are all needed simultaneously, additional UART <-> USB hardware is needed. A second nRF DK can be used if available. Pin P0.25 needs to be wired to the TXD pin, and P0.26 to the RXD pin of the external hardware. These pins will provide the secure TF-M output, while the two native COM ports of the DK will be used for the non-secure application and the network core output.
  
  

Can you verify that you connected everything as described above?

Best regards,
Dejan

[afok-esmart]

afok-esmart said:

I am using the 2 VCOM ports by default i.e., I haven't changed their pins or setup. I have an FTDI connected to P0.25 and P0.26 that is reading the TF-M output.

I already did, as mentioned in my original post. Please verify whether this setup is correct/sufficient.

EDIT #1 - FYI the board should be version 2.0.2 (see edit in original post)