_delay vs delay


I notice in the default code for the mbot Ranger it uses this function for delaying the program:

void _delay(float seconds) {
if(seconds < 0.0){
seconds = 0.0;
long endTime = millis() + seconds * 1000;
while(millis() < endTime) _loop();

How is that different from using the normal C programming “delay()” function? Does it matter which I use?

The other question is if I set the ranger to move forward at a certain speed as follows:


and then issue a delay, does the ranger stop moving for the duration of the delay or does the program delay while the ranger keeps moving forward?


This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.