SLIP on NRF HW

[pbtgit]

I have successfully used SLIP with QEMU on a Linux host.
Now i want to run SLIP on NRF52840DK HW but it does not work.
The NRF board does not have Ethernet HW so the SLIP driver uses NET_DEVICE_INIT with DUMMY_L2 layer instead of ETH_NET_DEVICE_INIT.

Assuming the DUMMY_L2 interace could have problems with Ethernet frames i changed the tunslip6 setup on linux side to use a tunnel device instead of the default tap device but still no go.

[jukkar]

I have not tested this kind of setup, but there should be no difference in zephyr side whether the slip is running in qemu or in target device. Note the dummy L2 in zephyr side does not add or use any L2 header so in linux side, a TUN device must be used (and not TAP).
Could you for example run a wireshark to your TUN device and see if there is any data transferred?

[krish2718]

@pbtgit I am stuck in the same situation as you, unable to get SLIP working, I had enabled USB CDC as well. Can you please elaborate on difference b/w Nordic USB CDC vs Zephyr USDB CDC?

[krish2718]

I have found the problem, SHELL wasn't completely disabled, so, shell_thread was stuck waiting for UART access, once I have completely disabled SHELL, ping worked straightaway even without any USB CDC, just plain SLIP + UART. Thanks.

[ofirshe]

Hey @krish2718 @pbtgit, could you share your configuration for setting up SLIP over UART? I’m currently facing an issue where pings sent from my Linux machine to the board don’t receive a response. The configuration I’m using can be found here.

[krish2718]

Please see https://github.com/nrfconnect/sdk-nrf/tree/main/samples/wifi/wfa_qt_app and the command is

west build -b nrf7002dk/nrf5340/cpuapp -- -DEXTRA_CONF_FILE=overlay-slip.conf -DEXTRA_DTC_OVERLAY_FILE=nrf7002_uart_pipe.overlay

[ofirshe]

Thank you so much, @krish2718! I used your example, and it worked perfectly. I truly appreciate your help!