LOG_XXX macro don't work anymore with float or double value

[Luca Gradassi]

Hello,

I'm porting a code from NRF Connect 1.1 to 1.3. Previously I was able to show in the console floats or double values, but now this seems not be possible anymore.

If I write LOG_INF("Value %f", val) on the console I've "Value %f".

Any idea ?

[Martin Lesund]

Hi Luca,

NCS v1.3.0 is using an updated Zephyr version:

See release notes
Floating Point Services

• FLOAT and FP_SHARING Kconfig options have been renamed to FPU and FPU_SHARING, respectively.

So if you add CONFIG_FPU=y in prj.conf then it should work.

[Luca Gradassi]

I've CONFIG_FPU=y in my proj.conf but still doesn't work...

[Luca Gradassi]

I worked it around by unsing a sprintf

[DevinCallahan]

There is the config LOG_ENABLE_FANCY_OUTPUT_FORMATTING which changes the zephyr logger to use a different format function that appears to support printing floats.  If you just need the logger to print floats that is probably a more efficient than building in what sprintf needs to support floats.