My OS is Windows 8.1, 64 bits (I tried with windows 8 also). I tried using firmware 1.03 and 1.05 M. When I try to download the kernel it says that have to stop a VM... and when I try to download the firmware it appears the casper error....I am not using a Virtual Machine... Well I am assuming VM means Virtual Machine ...... My hardware version is 0.60...and I am using the USB 2.0 port of my machine...

You're mixing up the EV3 Linux kernel and the actual ROBOTC VM (or firmware). When you create the SD card, you're creating a base Linux image, without the ROBOTC VM on it. Downloading the ROBOTC firmware just pushes a small Linux library to the SD card, which allows the base image to run ROBOTC programs.

If you're using the SD card, you can simply remove it if you want to go back to the standard LEGO Linux image (+VM). You don't need to redownload the firmware to the brick, it's been left untouched.

Of course I tried to restart EV3, restart PC and reload firmware - no result. I tried to start RobotC environment using "Run as administrator" option - no result. I tried to find the messages at this forum described the similar error - no result again... But the native Lego software works with my brick without problem.

So could you help me to detect what's wrong? My operation system is Windows 8.1 x64, native hardware (not the virtual machine), the connection type is USB.

Fri May 09, 2014 4:42 pm

Indy

Rookie

Joined: Wed May 07, 2014 7:51 pmPosts: 3

Re: ROBOTC 4.09 Beta 1 (EV3 Support) Available Now!

avgera wrote:

So could you help me to detect what's wrong? My operation system is Windows 8.1 x64, native hardware (not the virtual machine), the connection type is USB.

It sounds like you updated the linux OS but did you also install the RobotC virtual machine (firmware)?

The getting started document (in the 1st post of this thread) describes the process. Updating the linux OS is step 2 and the RobotC VM is step 3.

The document was initially kind of confusing to me because both steps use the term 'firmware'. It might be more clear if step 2 had the word firmware removed - the wording should match the menu choices.

Hope that helps,

Fri May 09, 2014 6:27 pm

avgera

Rookie

Joined: Fri May 09, 2014 4:25 pmPosts: 4

Re: ROBOTC 4.09 Beta 1 (EV3 Support) Available Now!

OMG! I found that I simply didn't see the step 3 when I read this document!

Excuse me for this stupid mistake. Thank you very much, all is Ok now!

Sat May 10, 2014 3:30 am

matd

Rookie

Joined: Sat May 10, 2014 8:54 amPosts: 1

Re: ROBOTC 4.09 Beta 1 (EV3 Support) Available Now!

Hi! I'm new to EV3 and the forums, but a long time technics fan.

I've got RobotC setup and working fine, but I have a problem using the EV3 medium servo.. SetMotorTarget doesn't seem to work correctly for that motor - a positive input of one degree makes it turn several rotations, and a negative input of one degree makes it turn in reverse forever! I couldn't see this in the known-problems.. am I doing it wrong?

Also, is there any way yet to control the two large servos with synchronization?

By the way - RobotC seems great (I'm a programmer by trade!)May thanks,-Mat

I've got RobotC setup and working fine, but I have a problem using the EV3 medium servo.. SetMotorTarget doesn't seem to work correctly for that motor - a positive input of one degree makes it turn several rotations, and a negative input of one degree makes it turn in reverse forever! I couldn't see this in the known-problems.. am I doing it wrong?

The following code does not seem to trigger this issue using the latest internal build (freshly cooked this morning)

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