[HELP] Need Help with Lejos

[bluatigro]

i m trying to get lejos to work

everything exept 1 thing is til now good

i can not format my SD

my windows 10 does not see it

i m learing whit the WWW whit some examples

i made this :

	import lejos.hardware.lcd.LCD ;
public class Tank_remote
{
  static EV3IRSensor ir = new EV3IRSensor( SensorPort.S4 ) ;
  static TankRobot tank = new TankRobot() ;
  public static void main( String [] args )
  {
    LCD.drawString( "Tank remote ." , 2 , 3 ) ;
    while ( true )
    {
      tank.delay( 40 ) ;
      byte [] cmd = new byte [ 4 ] ;
      ir.getRremoteComands( cmd , 0 , cmd.length ) ;
      if ( cmd[0] == 1 )
        tank.move( 100 ) ;
      else if ( cmd[0] == 2 )
        tank.move( -100 ) ;
      else if ( cmd[0] == 3 )
        tank.turn( 100 ) ;
      else if ( cmd[0] == 4 )
        tank.turn( -100 ) ;
      else
        tank.tlf() ;
    }
    ir.close() ;
    tank.close() ;
  }
}
	

	import lelos.hardware.* ;
import lejos.hardware.motor ;
import lejos.hardware.port ;
import lejos.hardware.sensor ;
import lejos.robotics.* ;
import lejos.utility.Delay ;
	public class TankRobot
{
  static EV3LargeRegulatedMotor MB =
    new EV3largeRegulatedMotor( MotorPort.B ) ;
  static EV3LargeRegulatedMotor MC =
    new EV3largeRegulatedMotor( MotorPort.C ) ;
  static EV3IRSensor IRS =
    new EV3IRSensor( SensorPort.S4 ) ;
  static SensorMode distMode ;
  static RangeFinderAdapter RFA ;
  static EV3ColorSensor CS =
    new EV3ColorSensor( SensorPort.S1 ) ;
  static ColorAdapter CA ;
  /**
   * TankRobot()
   * constructor
   */
  public TankRobot()
  {
    distMode = IR.getMode( "distance" ) ;
    RFA = new RangeFinderAdapter( distMode ) ;
    CA =  new ColorAdapter( CS ) ;
  }
  /**
   * getColor()
   * @return Color
   */
  public Color getColor()
  {
    return CA.getColor()
  }
  /**
   * getDistance()
   * @return disance in double cm .
   */
  public double getDistance()
  {
    return RFA.range() ;
  }
  /**
   * delay( ms )
   * @param ms : int milliseconds .
   */
  public void delay( int ms )
  {
    Delay.msDelay( ms ) ;
  }
  /**
   * setMotors( b , c )
   * @param b : int set speed motor at port b .
   * @param c : int set speed motor at port c .
   */
  public void setMotors( int b , int c )
  {
    // set motor B
    if ( b < 0 )
    {
      MB.setSpeed( -b ) ;
      MB.backwart() ;
    }
    else if ( b > 0 )
    {
      MB.setSpeed( b ) ;
      MB.forwart() ;
    }
    else MB.flt() ;
    // set motor C
    if ( c < 0 )
    {
      MC.setSpeed( -c ) ;
      MC.backwart() ;
    }
    else if ( c > 0 )
    {
      MC.setSpeed( c ) ;
      MC.forwart() ;
    }
    else C.flt() ;
  }
  /**
   * move( speed )
   * @param speed : set speed both motors same .
   */
  public void move( int i )
  {
    setMotors( i , i ) ;
  }
  /**
   * turn( speed )
   * @param speed : set speed both motors different .
   */
  public void turn( int i )
  {
    setMotors( i , -i ) ;
  }
  /**
   * flt()
   * slow down and stop .
   */
  public void flt()
  {
    setMotors( 0 , 0 ) ;
  }
  /**
   * stop()
   * stop motors .
   */
  public void stop()
  {
    MB.stop() ;
    MC.stop() ;
  }
  /**
   * close()
   * close all motors and sensors .
   */
  public void close() ;
  {
    MB.close() ;
    MA.close() ;
    IRS.close() ;
    CS.close() ;
  }
}
	

does this look good ?

if error's : please point them out

 

[Jim]

Hi,

What exactly is the problem? Your Widows 10 doesn't see your SD card? So the problem is more related to Windows than Lejos, right? 

Just to be sure 

[dr_spock]

Can you see a drive letter for the SD card in your Windows Disk Management?    You can also try something like SD Card Formatter from SD Association to reformat your SD card. 

[bluatigro]

@dr spock + jim :

i tryed SD formater on my old laptop

it does not see my SD

the port is visable in my pc

i see a port but not a thick line whit a part of blue

i hope this is the only problem i have to solve

if i instal lejos the SD help shows a black screen

whit : "no SD card" or somthing like that

[bluatigro]

update :

lejos on SD is now good

eclipse on new laptop

eclipse on old laptop not good jet :

google gives differend result's on old and new laptop

verry strange !!

next problem :

if i do eclipse > file > new java project

nothing happens visably

if i do hello wolrd i see my first project

but dont see any code

i can not type in the code window

and can not find where i can enlarge the code font

any help is welkome

[Jim]

I'm afraid I do need to dive into the world of leJos myself, so I haven't installed Eclipse (yet). 

I will give it a go, but I need to find some time to test it.

[bluatigro]

update :

i have lejos SD card

i have eclipse

eclipse has lejos menu

eclipse not showing lejos lib in left part of screen

but only java

i tryed booting my brick whit SD card :

it took a hour and stil led was red

what is my next step ?

[MajorAlvega]

I only used LeJOS a few times but the initialization of the SD card took "only" 7 minutes with last year version:

Can you detail how are you creating the SD Card?

[Jim]

I really need to do some testing with leJos as well. It's so much better to have an actual programming environment, instead of EV3-G.

[MajorAlvega]

10 hours ago, Jim said:

I really need to do some testing with leJos as well. It's so much better to have an actual programming environment, instead of EV3-G.

A little out of topic but lejOS is not the only option for a programming environment. ev3basic has a good IDE and if you are running ev3dev (linux distro for EV3) you can use Microsoft Visual Code as an iDE for several languages, python probably the best supported - or use your favorite iDE like PyCharm and then transfer the program to the EV3 through SSH.

[Jim]

I have installed ev3basic, which looks cool....but is indeed....basic.

I would love to Visual Studio Code, but I wasn't sure about Python. But maybe it isn't so bad.

It would be really helpful if we have separate topics for the different environments.