How to access ARM DSP functionality using Zephyr on Thingy52/pca20020?

RE: How to access ARM DSP functionality using Zephyr on Thingy52/pca20020?

awneil — Fri, 19 Oct 2018 13:31:05 GMT

As far as this is concerned, it's just a standard Cortex-M4F - so not specific to Nordic.

The standard ARM CMSIS documentation would apply ...

https://developer.arm.com/embedded/cmsis

RE: How to access ARM DSP functionality using Zephyr on Thingy52/pca20020?

Lars Knudsen — Fri, 19 Oct 2018 12:43:50 GMT

ok, thanks - I'll do that (I thought maybe there would be a Nordic specific example)

RE: How to access ARM DSP functionality using Zephyr on Thingy52/pca20020?

Håkon Alseth — Fri, 19 Oct 2018 12:40:49 GMT

Hi,

By basic support, I mean that the FPU in the core is enabled. I am unfortunately not aware of any FFT libraries in the zephyr code base, but I recommend getting in touch with the zephyr community to verify this.

Kind regards,

Håkon

RE: How to access ARM DSP functionality using Zephyr on Thingy52/pca20020?

Lars Knudsen — Fri, 19 Oct 2018 12:24:05 GMT

Hi Håkon,

The basic support could probably be fine for now - do you have an example or possibly links to docs or other? I need some FFT at least - generic filter kernel operations would be awesome too.

Lars

RE: How to access ARM DSP functionality using Zephyr on Thingy52/pca20020?

Håkon Alseth — Fri, 19 Oct 2018 11:58:51 GMT

Hi,

Do you mean the CMSIS-DSP software library, or the basic support for doing DSP operations? The latter is by-default supported as zephyr supports Cortex M4F, but the CMSIS-DSP library must be manually added to either your project or into the <zephyr>/ext/ part of zephyr, if approved by the community.

Kind regards,

Håkon