Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

Matthew K — Mon, 15 Jan 2018 04:00:16 GMT

Wow, you are my rescuer, Joakim! Case closed!

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

Joakim Jakobsen — Thu, 11 Jan 2018 09:00:06 GMT

Hi Matthew!
Thanks for uploading your project.
Try including the nrf.h headerfile in your my_foo.c file (that it turn includes the nrf52.h, which sets the __FPU_PRESENT == 1), that should get rid of the error.
Best regards.

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

Matthew K — Thu, 11 Jan 2018 04:59:39 GMT

Thanks guys! I have uploaded the project to the original picture. Can you take a look, please?

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

Joakim Jakobsen — Wed, 10 Jan 2018 12:15:02 GMT

I'm haven't been able to reproduce the error that you are seeing.
Maybe you could upload your project/main file so I can test your project?
Best regards.

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

MANGO — Tue, 09 Jan 2018 09:15:42 GMT

Hi, Joakim.

Do you have the same problem as Matthew? RE: Yes. I was using the NUS (Nordic UART Service) example and tried to combine the FFT example.

I observed the same compiler message.

Can you try it on your side? Just like this question stated, I don't want to add __FPU_PRESENT in the preprocessor menu, either.

-Regards, MANGO

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

Joakim Jakobsen — Mon, 08 Jan 2018 14:22:30 GMT

Hi MANGO!
Do you have the same problem as Matthew?
I'm not aware of any other configurations, I couldn't find anyone either.
I'll see what I can find out and get back to you.
Best regards,
Joakim.

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

MANGO — Thu, 04 Jan 2018 04:27:25 GMT

Hello, Joakim.

This looks strange. Both HRS project and FPU_FFT(S132) project uses the nRF5_SDK_14.2.0_17b948a/components/device/nrf52.h

and it is commonly defined that #define __FPU_PRESENT 1.

Then why does the #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" appear

if I don't manually define __FPU_USED in the Embedded Studio's preprocessor menu?

Since both projects use the same nrf52.h file, adding this looks unnecessary to me.

Aren't we missing other configuration difference between two projects?

-Regards, MANGO

RE: Adding ARM math library to Segger's nRF52 BLE projects - check __FPU_PRESENT compile error

Joakim Jakobsen — Wed, 03 Jan 2018 14:53:43 GMT

Hi MatthewKYEO!
You should be able to find the #define __FPU_PRESENT 1 in the nrf52.h header file.
It should be set to 1 in your HRS example as well, but you can verify that it is.
Best regards.