Timed if statement waiting for something else

[anthchamp]

I want to stop a motor if a limit switch has been hit for a certain amount of time without another limitswitch.
For example

if limitswitch hit
if longer than 200ms without other limitswitch hit
stop

How would I code this? Thanks

[dougp]

@anthchamp

if limitswitch hit if longer than 200ms...

Can you get this far?

Hint: don't use delay().

Blink without delay() explained line-by-line

[drmpf]

The millisDelay class in my tutorial How to write Timers and Delays in Arduino
makes it easy to do things like this.

the code would look like

millisDelay timer;
unsigned long TIMER_MS = 200;

if (limitswitchHit) {
  if (!timer.running()) {
     timer.start(TIMER_MS);
  }
} else { 
   // not at limit any more stop timer
  timer.stop();
}
if (timer.justFinished() ) {
   // at limit for 200ms
  // do some thing
}