Blinking K6: example of AVR C++IO library.

k6.cc

#define F_CPU 12000000UL

#include <krdln/port.h>

int main() {
	Output<A::Pin<0>> led;
	Output<A::Pin<2>, false> err; // false: "on" level is 0V
	Button<C::Pin<3>> but; // automagic pullup, yay!
	int const T = 300;
	
	while (true) {
		while (!but);
		dms(100); // debounce (wait for 100ms)
		if (!but) {
			// warn if too short
			hold(err), dms(T); // light up diode for T milliseconds
			// Comma postpones destruction of object returned by hold,
			// which does =1 in c-tor and =0 on d-tor.
			continue;
		}
		unsigned random = 0;
		while (but) ++random;
		int score = random % 6 + 1;
		while (score--) {
			hold(led), dms(T);
			dms(T);
		}
		dms(2*T);
	}
}