Ultrasonic ranger finder

VEX V5 General Discussion Technical Discussion
1

I am having trouble programing the ultrasonic sensor. I need a code that will start up two motors until it is 15 units away from an object than i would like it to back up for 2 seconds and turn slightly to the left and then repeat this whole process. i am in great need of help. thank you

2

Well what do you have so far?

I scrapped this together.


void main ( void )
{
      StartUltrasonic ( 1 , 11 ) ;
      while ( 1 == 1 )
      {
            SetMotor ( 1 , 255 ) ;
            SetMotor ( 2 , 0 ) ;
            if (  GetUltrasonic ( 1 , 11 ) =< 15 )
            {
                  SetMotor ( 2 , 255 ) ;
                  SetMotor ( 1 , 0 ) ;
                  Wait ( 2000 ) ;
                  SetMotor ( 1 , 255 ) ;
                  SetMotor ( 2 , 255 ) ;
                  Wait ( 500 ) ;
            }
      }
}
3

well i current have nothing. i just need a simple code (like the one you have) so i can get a better understanding on how to program the ultrasonic sensor. i do have one question. where is the ( getultasonic coming from i am not able to insert it in the “if” statement?

4

I called the function directly, instead of creating a variable using the ultrasonic get command.

ultra = GetUltrasonic(1,11);
if(ultra =< 15) {

//code

}