Error: L6218E: Undefined symbol arm_fir_init_q15 (referred from low_pass_filter.o).

[jim_wei]

Posted on March 25, 2014 at 06:58

I have a low pass filter function in my project which calls q15 fir filter.  The first statement in the filter function is &sharpinclude ''arm_math.h''.  When complie the project, I received following error:

.\Obj\transmitter.axf: Error: L6218E: Undefined symbol arm_fir_init_q15 (referred from low_pass_filter.o). Since I have included ''arm_math.h'' which defines symbol arm_fir_init_q15, why the compiler says it is undefined? Can anyone please help explain? Thanks! Jim   #stm32

[Amel NASRI]

Posted on March 25, 2014 at 09:38

You have to enable CMSIS usage in your IDE.

The following discussions may help you: 1-

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/CMSIS%20DSP%20library%20and%20FPU%20configuration

2-

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/CMSIS%20DSP%20compilation%20error%20%20Struct%20Initialization

-Mayla-

[frankmeyer9]

Posted on March 25, 2014 at 10:47

An you need to add the source file containing the implementation of arm_fir_init_q15 to your project. The headerfile just makes the names known, but (usually) doesn't add anything real.

Or, alternatively, add the respective library to your project.

[Tesla DeLorean]

Posted on July 20, 2017 at 00:31

Fixes for above dead links

https://community.st.com/0D50X00009XkiVXSAZ

 

https://community.st.com/0D50X00009XkYtZSAV