Hi G. Pin 4 or GPIO 4, pin 7? I do not understand what you are aiming for, but anyway, may be this could help: http://codeandlife.com/2012/07/03/benchmarking-raspberry-pi-gpio-speed/ Laura Checked by
Thanks laura We are trying to set the clock rate at pin 4 , to a accurate frequency for 'rf' ( +/- 10 hz ish ) but also would be handy if could be set to audio round 1500 hz Yesterday we found , we c