STM32CubeiDE + RTOS float problem

i can add also that prinf of float give me hard fault.

For printf, try this include: https://github.com/mpaland/printf

I cannot help you more without additional information

thanks i will try to avoid hardfault with printf.

Some other info:

i have this code:

float currtempvalue = MPC9808_getTemperature();

 float  currtempres= MPC9808_getResolution();

   printf("MPC9808: temperature %f - resolution %f \r\n",currtempvalue ,currtempres);

whit debug i can see that MPC9808_getTemperature() return, correctly 28.5 but currtempvalue is assigned with garbage.

I try also to modify ftos aligment (from 8 to 4) as MCU. nothing changed.

Regards,

carmelo

The reason for your hard-fault in printf is explained here:

http://www.nadler.com/embedded/newlibAndFreeRTOS.html

@Markus GIRDLAND​ (ST Employee) - Yet another example of your customers getting tripped up by STM's incorrect newlib integration...

@stm32f4​ - Carmelo, did this fix your problem??

http://www.nadler.com/embedded/newlibAndFreeRTOS.html

Please let us know!

hello Dave. Sorr for delay.

Yes i do.Thanks so much for you hint. I did exacle what you suggest with link.

I fix also the garbage behavior. It was my mistake. i did not include the correct .h in mai main. Compiler not complain at all only a warning. afte that all work correctly.

Thank a lot.

Carmelo

do you already use this ?

The float formatting support is not enabled, check your MCU Settings from "Project Properties > C/C++ Build > Settings > Tool Settings", or add manually "-u _printf_float" in linker flags.

I've provided an updated version of the web page and code here:

http://www.nadler.com/embedded/newlibAndFreeRTOS.html

@Markus GIRDLAND​ - Any status update?

Please let your architecture group know they're free to contact me for any clarifications or suggestions,

Thanks,

Best Regards, Dave