Have you considered direct port manipulation to speed up the clock pin toggling?
You can, for instance, pulse a pin with two instructions:
PINB = 0x01 ; // toggle pin 8 (bit 0 of port B on Uno)
PINB = 0x01 ; // toggle pin 8 back again
Have you considered direct port manipulation to speed up the clock pin toggling?
You can, for instance, pulse a pin with two instructions:
PINB = 0x01 ; // toggle pin 8 (bit 0 of port B on Uno)
PINB = 0x01 ; // toggle pin 8 back again