Kinetis K70 CPU cycle counter

[cport]

Does anyone have any idea how to get a good CPU cycle count for code on the K70? The software analysis seems inconsistent and I have not figured out if the DSP Cycle Counter in the processor expert can be applied to the K70 board. Im trying to benchmark simple floating point math functions (multiply, divide, square root).

[konrada]

You can use the SYSTICK counter, a 24-bit countdown in the Cortex-M core (unless your OS uses it to produce something like periodic timer interrupt). Or if you have a PIT to spare, use it as a 32-bit free-running countdown counter (clocked by bus clock).