Implement a program that lets the 4 LEDs on the Tower toggle all together using the PIT Interrupt.
For easy debugging, let the program run in the RAM.
* toggle period 0.5 s,
* extract vector table and service routines in 'vector.c.
Hint: Use the 'arm_cm4.c and 'arm_cm4.h' from the freescale kinetis homepage, which include access functions for the NVIC.
For ease of use, these routines are included in the result file.