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

Question asked by wei.jim.001 on Mar 25, 2014
Latest reply on Jul 20, 2017 by Clive One
I have a low pass filter function in my project which calls q15 fir filter.  The first statement in the filter function is #include "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
 

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