OS: Ubuntu 24.04.2 LTS
NRF SDK: v3.0.1
NRF Toolchain: v3.0.1
Hardware: NORA B206 (nRF54L15)
Application: nrf/samples/openthread/coprocessor
Hi, I'm trying to bring up the coprocessor sample on the NORA B206 which has a nRF54L15. I've left the application completely unchanged other than a custom board 1 to 1 ripped from the nRF54L15DK. The only changes made for my custom board are:
- Removed spi00 and the corresponding external flash.
- Changed internal HFXO to 15250 fentofarads instead of 15000.
- Changed LFXO to use external caps.
- Board name changes.
I've made sure that the app has no other changes by diffing the files.
The board specific .overlay and .conf for the nRF54L15DK are the exact same but with their names changed to apply to my custom board.
The nRF54L15 is communicating over UART with an IMXRT1064 running the spinel driver.
There are a few things happening:
- `mpsl_init` takes an incredibly long time to execute at startup. This usually takes about a minute after starting debug with a JLink. If I restart from the debugger instead of doing a full stop and start, `mpsl_init` is generally instant.
- After running for a while, while the IMXRT is trying to communicate over UART, a MPSL assert is hit in file 107 line 291. If the IMX is halted, the nRF54L15 never crashes.
Since, as far as I'm aware, MPSL is pre-compiled and closed source, it's almost impossible to reason about what is going wrong.
