#error "Define according the used Cortex core ARM_MATH_CM7, ARM_MATH_CM4, ARM_MATH_CM3, ARM_MATH_CM0PLUS or ARM_MATH_CM0"Based from this Topic https://community.st.com/s/question/0D50X00009XkXPtSAN/need-help-in-dsp-library-for-keil- The problem is so...