RE: InvenSense motion driver porting problem: Undefined symbol _MLPrintLog (referred from data_builder.o).

YooLoo — Wed, 21 Feb 2018 02:10:50 GMT

Dear Edvin,

Thank you for your reply! You are absolutely right, I did not notice the function was not defined since it is not mentioned in the porting guide.

I followed your advice and define the _MLPringLog() in my own c file by rewriting the function definition found in "log_stm32.c", using NRF_LOG_INFO(), and then my project can compile without errors.

Thank you very much!

RE: InvenSense motion driver porting problem: Undefined symbol _MLPrintLog (referred from data_builder.o).

Edvin — Mon, 19 Feb 2018 11:15:18 GMT

Hello,

The reason this error appears when you add eMPL_outputs.c is that this file has #include "data_builder.h". data_builder.c has #include "log.h", which has a function, _MLPrintLog() which is not defined anywhere in your project.

I see that this function is defined two places in your project folder. "log_msp430.c" and "log_stm32.c". I can't find anything for Nordic's nRF.

What you can do is to create a new file, e.g. log_nrf52.c, where you forward the _MLPrintLog() function to NRF_LOG_INFO() to see the output. Remember to enable logging in sdk_config.h.

Best regards,

Edvin