#include <wiringPi.h>
#include <iostream>

int main() {
	wiringPiSetupPhys();
	pinMode(12, PWM_OUTPUT);
	std::div_t div;
	for (int i = 0; ; i = (i + 1) % 2048, div = std::div(i, 1024), delay(1)) {
		const int duty_cycle = div.rem * (1 - 2 * div.quot) + 1024 * div.quot;
		pwmWrite(12, duty_cycle);
		if (i % 64 == 0) {
			std::cout << int(100.f * duty_cycle / 1024.f) << std::endl;
		}
	}
	return 0;
}