HelloI think you need to add ARM_MATH_CM4 like as shown in CM4.jpgThere is a lab for this board that has a DSP example you can try out: www.keil.com/appnotes/docs/apnt_233.aspI added the CMSIS-DAP library as shown in DSP_Lib.jpg Download the lab and see if you can get the DSP example to work. Hopefully it will help.Bob