void writereg() { digitalWrite(latchPin, LOW); for (int i = 7; i >= 0; i--) { digitalWrite(clockPin, LOW); Serial.print("wswitch&&&&&&"); Serial.print(i); Serial.print("----------------------"); digitalWrite(dataPin, switches[i].stat); Serial.println(switches[i].stat); digitalWrite(clockPin, HIGH); } digitalWrite(latchPin, HIGH); touched = false; } I don't understand what's wrong with what I'm doing here, but this for loop runs into an almost infinite loop and prints crazily. I'm a newbie to electronics and Arduino and I don't understand what's wrong here. Please help. [![enter image description here][1]][1] [1]: https://i.sstatic.net/v1kOF.png