I am developing a capacitive touch sensor for the Photon. I am driving one pin high then how long it takes to drive a sensor pin high using an external interrupt and micros(). I currently have the system tuned to take around 5 uS (baseline) and about 8 uS when “touched”. This is OK, but I am wondering if I can access an internal clock that runs faster than micros() to gain higher resolution measurements to reduce the sensing period.
Thanks in advance for your help.