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2018-05-27 16:53:26 -0500 received badge  Famous Question (source)
2018-02-14 07:19:00 -0500 commented question Error while cross-compiling rospkg for arm

I am not sure what is happening in this case. If the library is indeed at that location, I do not see how the assertion

2018-02-07 06:35:46 -0500 commented answer Error while cross-compiling rospkg for arm

Unfortunately not. Some ROS packages don't follow CMake conventions strictly and pollute include-/link-dirs with host-pa

2018-02-07 06:31:23 -0500 commented question Error while cross-compiling rospkg for arm

Then I am lost, I thought your toolchain might not include the multiarch dirs by itself, but if you add them manually it

2018-02-06 08:02:05 -0500 commented question Error while cross-compiling rospkg for arm

Does your rootfs provide an librt.so? If so, where?

2018-02-06 08:01:29 -0500 commented answer Error while cross-compiling rospkg for arm

After some research I don't think this is causing the problem, it might cause issues later on, though.

2018-02-06 08:01:00 -0500 commented answer Error while cross-compiling rospkg for arm

After some research I don't think this is causing the problem. Where in your rootfs provide a librt.so? If so, where?

2018-02-06 07:29:23 -0500 answered a question Error while cross-compiling rospkg for arm

Currently, the support for crosscompiling ROS is limited. You will encounter multiple packages where you need to adapt t

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2017-05-10 19:44:08 -0500 commented question CMake error installing Kinetic on Raspberry Pi 3

That does not answer the question though. You can check with dpkg -l | grep libeigen3-dev.

2017-05-10 16:26:47 -0500 commented question CMake error installing Kinetic on Raspberry Pi 3

Do you have libeigen3-dev installed?

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2017-05-10 12:51:25 -0500 commented question Crosscompiling ROS into relocatable code

For example, the generated roscppConfig.cmake contains absolute paths referring to my rootfs (CMAKE_SYSROOT) and the wor

2017-05-10 12:50:34 -0500 commented question Crosscompiling ROS into relocatable code

For example, the generated roscppConfig.cmake contains absolute paths referring to my rootfs (CMAKE_SYSROOT) and the wor

2017-05-08 20:23:44 -0500 commented question Crosscompiling ROS into relocatable code

I tried using DESTDIR which fixed some of my issues. There is still a lot of files which contain the absolute install-di

2017-05-08 20:23:33 -0500 commented question Crosscompiling ROS into relocatable code

@Dirk: I tried using DESTDIR which fixed some of my issues. There is still a lot of files which contain the absolute ins

2017-05-08 20:23:09 -0500 commented question Crosscompiling ROS into relocatable code

@[Dirk Thomas]: I tried using DESTDIR which fixed some of my issues. There is still a lot of files which contain the abs

2017-05-08 20:22:40 -0500 commented question Crosscompiling ROS into relocatable code

@dirk-thomas: I tried using DESTDIR which fixed some of my issues. There is still a lot of files which contain the absol

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2017-05-05 04:07:21 -0500 commented question Crosscompiling ROS into relocatable code

I tried using DESTDIR which fixed some of my issues. There is still a lot of files which contain the absolute install-di

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2017-04-28 16:40:33 -0500 asked a question Crosscompiling ROS into relocatable code

Crosscompiling ROS into relocatable code Hi, I am currently working on cross-compiling the ROS dependencies I need for

2017-01-26 10:45:54 -0500 asked a question controller_manager and hardware_interface::RobotHW unresponsive after loading controller

Hi,

I have been writing a drive for my robot. Inside of a Node it works fine but I want to use it as a Nodelet. When loading a controller, the call blocks. It appears that the code is hanging inside of the controller_manager in this block (controller_manager.cpp:261):

while (ros::ok() && used_by_realtime_ == former_current_controllers_list_){
  if (!ros::ok())
    return false;
  usleep(200);
}

One explanation might be that the manager only uses one thread for spinning and is already in its callback, such that the controllers can't be switched in the background, I am not sure whether that is correct and how I would fix it. Can I use another spinner in my code?

2017-01-20 07:58:05 -0500 asked a question Units of hardware_interface::VelocityJointInterface

Hi,

what are the VelocityJointInterface's command's units? I am using two such interfaces on my robot class but I can't make sense of the data I get.

For example, I am using a DiffDriveController. My wheels have a radius of 4.5cm and I set the forward speed to 1m/s (x component of the cmd_vel linear velocity set to 1). With these parameters the command-values are set to 55, which does not make sense if I assume the unit to be rad/s, m/s, frequency or rpm.

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