o: include the correct core_cm#.h file
         core_cm0.h if your device is a CORTEX-M0 device
         core_cm3.h if your device is a CORTEX-M3 device
         core_cm4.h if your device is a CORTEX-M4 device
         core_cm7.h if your device is a CORTEX-M4 device */
#include &lt;core_cm#.h&gt;                           /*!&lt; Arm Cortex-M# processor and core peripherals */
/* ToDo: include your system_&lt;Device&gt;.h file
         replace '&lt;Device&gt;' with your device name */
#include "system_&lt;D