Cannot get Eddystone example to compile SDK15 pca10040e

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Einar Thorsrud — Thu, 26 Apr 2018 07:56:55 GMT

Please use the attached nrf_oberon library build. It fixes the issue with floating point instructions being used in the "no_fp_short_wchar" files that is part of SDK 15.0.0 (used by Keil and IAR version <= 7 for nRF52810 targets).

You can extract the nrf_oberon_2.0.5.zip in <SDK_15.0.0>\external\nrf_oberon. Please note that the revision number has changed (2.0.4 -> 2.0.5) so you must also update the file name in your Keil project, which you can find under the nRF_Oberon_Crypto virtual folder. This .zip has the same license as the nrf_oberon library in the SDK, and the licence file is included in the zip in the same directory as the library files.

(There is no functional change in this library, so there is no reason to update for customers not using Keil or IAR 7 to build for nRF52810.)

devzone.nordicsemi.com/.../nrf_5F00_oberon_5F00_2.0.5.zip

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Einar Thorsrud — Fri, 20 Apr 2018 07:34:08 GMT

Hi Antonio. The problem is that the Oberon library is built with some assembly files using FPU instructions. I have a build that fixes this on my desk, but we need to test it properly before we can share it. Unfortunately, there has been some delays due to unforeseen events, but I expect we will provide a fixed Oberon library build soon.

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Antonio — Tue, 17 Apr 2018 22:01:09 GMT

Is there a way to use another library meanwhile? (uECC?). I tried disabling the library OBERON and tuning on uECC, but there is a function in the es_security file that depends on nrf_crypto_ecc_public_key_from_raw being called from the es_security_client_pub_ecdh_receive function.

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Bjørn Kvaale — Tue, 17 Apr 2018 08:02:20 GMT

A colleague of mine has found that the problem is related to the assembly lines in the Oberon crypto library that use floating point instructions. A bug fix has been reported & we will let you know when we have a fix.

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Antonio — Mon, 16 Apr 2018 13:01:33 GMT

Thank you. I also think it has to do something with the library being precompiled with the FP flag on, which conflicts with the actual project not using the HW FP.

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Antonio — Fri, 06 Apr 2018 13:23:36 GMT

Did you try compiling Eddystone for the 10040e?

Eddystone and all other examples compile perfectly if I compile for pca10040.

I followed the new instructions as per SDK15 micro_ecc backend installation that asks to Install version 6-2017-q2-update of the GCC compiler toolchain for ARM and then did the "build_all" batch file.

RE: Cannot get Eddystone example to compile SDK15 pca10040e

Bjørn Kvaale — Fri, 06 Apr 2018 11:59:07 GMT

That could be the case. I did not get any errors once I installed the micro-ecc like explained in this link. Did you make micro_ecc like shown in the link? I am using Keil uVision V5.24.2.0 & everything worked without any issues at all.

Update: It seems I made an error before & did not compile the 10040e example like I thought I did. When I try compiling the Eddystone example pca10040e, I get this error when the linking occurs:

We believe it has something to do with the Oberon-cryptography library. Will let you know when we figure this out.