Can not enable Softdevice with nRF52 Preview DK

[Marius Heil]

Hi,

I am trying to get my mesh running on the nRF52 Preview DK but calling

SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, NULL);

will break my program. If I leave the Softdevice disabled, the rest of my code runs okay while constantly complaining, that the Softdevice is not enabled.

The debugger runs until it reaches the line with sd_softdevice_enable and then jumps to the Hardfault handler. How would I go on about debugging this? Is there an Errata that I am missing?

Thanks, Marius

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I am using this GCC setup if that helps...: embeddedsoftdev.blogspot.de/.../ehal-nrf51.html

[MartinBL]

Hi

Code stuck in SOFTDEVICE_HANDLER_INIT() usually indicates a faulty low frequency crystal. To see if this is an issue try to write:

SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_SYNTH_250_PPM, NULL);

instead to synthesize a low frequency clock from the 16MHz crystal. You can also try to start the LFCLK manually and check whether it starts or not.

It can also be a SDK/Softdevice incompatibility. Have you set your RAM and ROM addresses in "Target Options -> Target" so that they match your Softdevice?

[Marius Heil]

Thanks a lot, that was the right hint. I've enabled floating point ABI support for my project which caused the linker to complain because the CMSIS library that I am using was not compiled with FPU support. I recompiled that library with FPU support and my mesh as well. I had a wrong include as well, which I just fixed. The result is just great.

My mesh seems to be working flawlessly with the nRF52 DK and some nRF51 Dongles. Didn't expect it to be that easy.....