Simple BLE example crash when using floats

[danielco68]

Hi Nordic Devzone,

I am using the simple BLE blink peripheral example that simply advertises and blinks an LED. I am using the ble_app_blinky_pca10040_s132 example found in the SDK

I have added the following lines of code in the infinite loop in main

float a = 1.0f;
float b = 2.0f;

float c = a / b;
NRF_LOG_INFO("c = %f", c); 

When I run the code, I get c = ----blank----- printing out over and over very fast.

Why does this issue occur?

Any help would be appreciated.

[Turbo J]

Did you bother reading the documentation for NRF_LOG module at all?

"Due to certain limitations, logging a float requires you to use the following dedicated macros: "

NRF_LOG_INFO("float value:" NRF_LOG_FLOAT_MARKER "\r\n", NRF_LOG_FLOAT(val))

Note to NRF: The html in the infocenter (at least for SDK16.0.0) uses „fancy” string formatting - which is not valid C syntax.

[haakonsh]

Turbo J said:

Note to NRF: The html in the infocenter (at least for SDK16.0.0) uses „fancy” string formatting - which is not valid C syntax.

Can you show us an example? 

[Turbo J]

Literally the code line following my qouted sentence. It may be less visible in US/EN settings, but the example uses unicode lower and upper quotation signs instead of ASCII ("). The string looks „fancy” instead of  "normal".

[haakonsh]

I see it, hmm that should not have happened. It seems to have been used a lot in the release notes, but never in the rest of the SDK, except for that sentence. I'll ask our Tech Writers to fix it :)