Hi
We tried in the IDE with the fastgpio configurations and we got up to 2 MHz. The tests were done on pin 2 and 3, but we got a better looking square signal in the pin 3 due to the PWM on that pin and the pin 2. If you need more information on it you can check this post https://communities.intel.com/message/213625#213625 . The test we’ve done on Linux side were done on pin 3 and 13.97 kHz was the max value of frequency we could set. We tried by reducing the period of the signal but the pins didn’t responded.
Regards
JPMontero_Intel