Plz help with Brick pi and java


#1

Hello there,
im developing an autonomous motor with brick pi and ultrasonic sensor and i want to use java code to program it.
I already run the motors but I have a problem with the speed. when I set the motors speed to fixed numbers the function gives me random numbers between 0 and the number I put it. by the way, i’m using the source code that uploaded by dexter.
also, i want to know how to run the ultrasonic sensors with the motors so if there is an obstacles it will stop and change the direction.
I do this project as my bachelor project and im stuck here, so please help me. Thanks in advance.


#2

no reply yet!!!


#3

Do you have any example source code you’re having trouble with?


#4
 Motor motor = new Motor();
motor.setCommandedOutput(0);
motor.setEnabled(true);
motor.resetEncoder();
brickPi.setMotor(motor, 0);
motor.setCommandedOutput(100);
for (int counter = 0; counter < 50; counter++) {
try {
System.out.println("Forward Motors: Speed " + brickPi.getMotor(0).getCurrentSpeed() + " encoder " + brickPi.getMotor(0).getCurrentEncoderValue() + " Time " + System.currentTimeMillis() % 10000);
Thread.sleep(200);
} catch (InterruptedException ex) {
// ignore
}
}
motor.setCommandedOutput(-25);
for (int counter = 0; counter < 50; counter++) {
try {
Thread.sleep(200);
System.out.println("Reverse Motors: Speed " + brickPi.getMotor(0).getCurrentSpeed() + " encoder " + brickPi.getMotor(0).getCurrentEncoderValue());
} catch (InterruptedException ex) {
// ignore
}
}

this code is a snap from the whole source code that’s on Github
as i said the problem is give random speed for the motor.
also the motor still working after the loop is finished for a while then stop which suppose to exit and stop when the loop end.

Thanks for your help.