You can do an almost immediate full reset with watchdog by activating it 'on place'.

wdt_enable(WDTO_15MS);
while (true);

You can use millis() for timing the reset as any other timed function.

You can do an almost immediate full reset with watchdog by activating it 'on place'.

wdt_enable(WDTO_15MS); // resets the MCU after 15 milliseconds
while (true);

You can use millis() for timing the reset as any other timed function.