Autonomous with Ultrasonic sensor doesnt work!!

[Chris Hibner]

Originally Posted by cilginbilgin

Here is the code I have written for autonomous. I want the robot to stop and the piston to extend when the ultrasonic sensor reads 40 inches. But it doesnt happen. We have tested the ultrasonic sensor and tuned it. We are sure that the distance ultrasonic sensor reads is true.

Can anyone tell me if the code is correct or wrong?
Thanks in advance.

http://imageshack.us/photo/my-images...tonomous2.png/

http://imageshack.us/photo/my-images...utonomous.png/

The portion of the code in the "while loop" will run continuously. The portion outside of the "while loop" will only run once (as soon as autonomous starts), and will never run again. Therefore, the code that is checking the ultrasonic sensor is never checked after the start of autonomous.

Remove the "while loop" around the motors, and place the while loop around all of your code. That should fix the problem.