Questions tagged [can]
Questions related to Controller Area Network (CAN) protocol, physical bus configuration, or the transmission, reception, and parsing of CAN messages.
31 questions
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Unreasonably High CPU Usage While Doing Simple Tasks
I am currently migrating a robot control software to ROS2 (from vanilla C++).
While doing so, i came across a number of issues related to the performance of the ros2 project. The specifics of the ...
- 31
0
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1
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223
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How to send and receive CAN messages on Ubuntu 18.04 using ROS Melodic
I am trying to use a PCAN-USB device (from Peak-System) to be able to send and receive CAN messages which I would like to use to control a robot using ROS at some point for work.From the research I ...
- 29
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2
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270
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Using Here3+ for GNSS information, missing documentation?
The Here3+ is a GNSS receiver often used by drones, specifically the pixhawk. I wanted to use this receiver in my own project for geopositioning, I am however completely unable to find any ...
- 11
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137
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How can I feel feedback with electric power steering (EPS)?
When I am rotating steering wheel and it meets an obstacle, I feel it. I have EPS. How does it work? Is it just explicit sensor and feedback? Can I sniff this feedback on CAN bus?
- 115
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ros_canopen PDO mapping (Schneider Motor CiA 402)
Hey guys,
I'm at a dead-end so in need of some help from the community, please. This question follows on from a closed GitHub issue on ros_canopen. My problem is as follows:
I'm unable to do a PDO re-...
robertjbush
1
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1
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119
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What network protocol/control units are motor-based robots controlled with?
I know most vehicles are controlled via CAN (Controlled Area Network) protocol through an ECU (Electronic Control Unit) which send/receives data using this protocol and then sends/receives Amps/Volts ...
1
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1
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1k
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Is it possible to use ROS2 real-time on a computer and connect to the robot actuator using a CAN bus?
I am using ROS2 real-time (still a lot to learn) to implement the various control element of my robot : SLAM, path planning, controller, etc...
For the first step of prototyping we would like to build ...
- 43
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What communication bus is used in state of the art systems to implement a synchronization signal?
I have a robotic system with many sensors that need to have very accurate localization associated with the data they gather.
We have a geolocalization system that acquire localization at high speed (...
- 111
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Do I have to use the CAN protocol that the motor controller uses in order to communicate with it?
I have a question about using the CAN bus to control motor controllers. Do I have to use the CAN protocol that the motor controller uses, e.g. CANopen CiA DS 301 CiA profile 402, in order to ...
0
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1
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18
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ROS_CanOpen Ixxat USB to can converter
Hello,
I want to use ros_canopen package to communicate via can. The communication should be done via a USB to can converter from the company Ixxat. Which steps are necessary to use the converter?
...
Henne
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1
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56
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How to install a CAN port on PC (under Ubuntu)
We are using Ethernet as our current control bus and are considering switching to CAN. Our main computing unit is a PC under Ubuntu which needs to be fitted with a CAN port.
Anyone can recommend a PC ...
- 609
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How can I measure latency in a CAN bus?
Given a CAN bus with one master and any number of motor drivers, is there a way to measure the time between sending a command from the master (e.g. a PC running ROS) and the execution of the said ...
- 31
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28
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SocketCan Bridge error when connecting multiple nodes to bus
Hi everyone,
I am attempting to use the socketCAN bridge from ros_canopen to communicate with two motor drivers front and rear on my robot. I am able to succesfully communicate with one of the motor ...
callum91
0
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1
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21
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Canopen_motor_node, Error document empty
Hi,
I'm trying to use the motion controller FAULHABER MCBL 3006 S AES with ros_canopen. It seems there is no tutorial on how to use ros_canopen, the closest i've found is : https://answers.ros.org/...
simchanu
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2
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finding the frequency of CAN send and CAN receive messages using CAN in Ubuntu
Can anyone please share me the command how can i find the frequency of CAN send and CAN receive messages. I'm sending CAN messages using a serial port and receiving it with a peak CAN usb. There is no ...
0
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1
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9
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socketcan_bridge_node error handling
I have an application that uses socketcan_bridge_node to do CAN communication. It works well, but occasionally the CAN network enters an error mode and the entire bridge node stops working. Is there a ...
9a3eedi
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1
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How many topics?
I have a 'device' (a custom drive-by-wire vehicle) that has a CAN bus onto which various messages are published. There are in the order of 20-30 different messages published by the various ECUs on ...
Dave Barnett
0
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1
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3
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error in socketcan-demo
I am trying to understand and implement CAN INTERFACES . For this, i found the following link which includes some good socketcan examples. https://github.com/JCube001/socketcan-demo
Though everything ...
Ayush Sharma
0
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1
answer
1
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using two nodes at a time
i have two nodes 1) which receives CAN messages from uc board to ROS (publisher) 2) which transmit CAN messages to uc board (subscribing). I need to run both the nodes in order to to these two tasks.
...
newbieros
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1
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9
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ros_canopen dcf_overlay setting
Hi,
I'm using ros_canopen to control my robot.
The joint_position_controller works but I get stuck with joint_trajectory_controller.
I set PDO mapping through dcf_overlay :
...
Craig
0
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1
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58
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How Feasible is integrating ROS with a CAN Bus?
I am pretty new to ROS, but I am have troubles finding any useful info about the CAN Bus and ROS. Could someone point me in the right direction?
I would love to use a Raspberry Pi and a PiCAN to ...
radix07
0
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2
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55
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ROS Control and CAN interface on a custom robot
Hello all,
I am currently in the process of working on a custom robot with custom joints. We have electric motors with an encoder and a low level driver that we can communicate with via CAN. I'm ...
atomoclast
0
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1
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2
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Publish to topic from file
Hello,
I am quite new to ROS. I have a logfile (format: .pcapng) and I want to write a node which receives the logged udp-packets (as a simulation; later, the node should receive these packets from a ...
Victoria_W
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1
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7
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Running Can Radar on Ros through Raspberry Pi 2
I need to send radar data to a bagfile on the raspberry pi 2.
I have access to the peak-USB http://www.peak-system.com/PCAN-USB.199.0.html?&L=1 cable and the PI Can board http://skpang.co.uk/...
williswalker94
1
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1
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182
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What's the difference between CAN's Motor Max Velocity vs. Profile Max Velocity?
CAN301/402 provides Max Motor Speed (0x6080,0x00) and Max Profile Velocity (0x607F,0x00). In profiled motions, the maximum speed is limited to the lower of these two values. In non-profiled motions, ...
- 153
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Set CANopen Node ID of Ingenia Pluto DC Servo Drive
Does anybody know how to configure the node ID of an Ingenia Pluto DC Servo Drive?
I've got a request out to their support team, but perhaps somebody here is already familiar with these drive boards.
...
- 153
0
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1
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29
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Does a CAN bus library or package exist in ROS?
Newbie here. I have installed ROS Hydro and I have run through all the ROS basic tutorials but I have no practical experience yet. I have an ELMO motor controller and motor set up on a workbench ...
Kurt Leucht
1
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1
answer
362
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Making high CAN baud rates work
I'm dealing with a board that no matter what I do I can't seem to make CAN work over 125 kbit/s. I'll give some detail about the board on the bottom, but I'm going to keep this question generic.
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- 3,250
0
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3
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Jaguar Motor Controllers + Pandaboard over CAN
Hi,
We want to use Jaguar Motor Controllers (http://www.vexrobotics.com/217-3367.html) in conjunction with ROS on a Pandaboard running Ubuntu 12.04 LTS. ROS is installed and running, however it is ...
aman501
0
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2
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13
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Communication with microcontroller via CAN
Hi, our team want to develop an autonomous car on the basis of a RC-Car. As framework we want to use ROS. Unfortunately none of us has any experiences with ROS.
The microcontroller that interfaces ...
platzhirsch
0
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1
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21
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CANopen Interface
hi there!!
I'm new on ROS and I'm trying to move a motor that have a CANopen (Control Area Network) interface. Looking into the stack list I'd find the cob_canopen_motor. Well, the problem is that I ...
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