#define Button PC14
#define LED PA2


void setup() {

  pinMode(LED, OUTPUT);
  pinMode(Button, INPUT);
 

}

void loop() {
 if(digitalRead(Button) == HIGH){     // i.e. latch the LED on until stop button is pressed
  digitalWrite(LED, HIGH);
}

if(digitalRead(Button) == HIGH){
  digitalWrite(LED, LOW);
}
}