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Questions tagged [socketcan]

SocketCAN is a Linux socket based implementation for Controller Area Network (CAN) protocol.

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SocketCAN recovery from buffer overflow CAN_ERR_CRTL_RX_OVERFLOW

I write an application in C/C++ which uses SocketCAN. Under some conditions I can generate an buffer overflow error CAN_ERR_CRTL_RX_OVERFLOW on my system. An ip command shows growing number of overflow errors. ip -details -statistics link show…
dr.chleb
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CAN Communication in QT

I have a specific problem with the CAN communication in QT. It is not a problem to send/write CAN messages, but the readFrame() function in QT doesn't load my received frames. If you are implementing a CAN communication in C++ you can use the read()…
Sinan Kiris
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SocketCan Error: Sending frame to hardware that is not powered up

I'm sending a message on a CAN bus with no powered on nodes. The CAN message returned has a message ID of 0x2000 0088, which indicates a CAN_ERR_FLAG. CAN_ERR_PROT and CAN_ERR_BUSERROR are set. Data[0..7]: 0x00 0x00 0x80 0x19 0x00 0x00 0x00…
Dylan Bennett
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SocketCAN CAN bus Arbit-lost error increments once program started

I'm doing a project that will connect multiple subsystems (sensors, controller, etc) via CAN bus. I'm using SocketCAN and have settings as below: root@ngtianxun-desktop:~# ip -details -statistic link show can0 5: can0: mtu…
T08
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Socket reading error on CAN BUS Linux Socketcan?

I implemented a CAN bus communication for writing and read operations with linux. I am using socketCan library. Write function works correctly. I have problems with my reading function: int can_receive(void) { struct can_frame frameRead; …
kevin94
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SocketCan: read() data after write()

I am implementing a small subset of a UDS client with SocketCAN on embedded linux. The communication between the client and server works on a request / response pattern. I would like to read() the response of the server after having used write() to…
nico1000
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Sending CAN-bus J1939 messages with no Data in linux

I need to send a CAN-bus J1939 message with no data using socketcan. The reason why the message needs to be sent with no data is to follow the spec J1939-73 DM11 (PGN=0x00FED3). The C code below works fine when sending data that is at least 1 byte…
rickthehope
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Python socketcan interface for J1939 transport protocol

Using python with socketcan in the J1939 protocol, it seems that recvfrom() does not return the interface when the data is more than 8 bytes. In the J1939 protocl, when there is more than 8 data bytes, multiple CAN messages are sent since a CAN…
rickthehope
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Sending a CAN J1939 message

I would like to get a code example to send a simple CAN message with the J1939 stack using Python. The following web site has a simple example to receive a J1939 message: https://justkding.me/thoughts/python-sae-j1939-socket-support The code on this…
rickthehope
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Why does SocketCAN bind() call always return 0 when called from JNI?

I'm attempting to create a Java wrapped C implementation of a CAN bus that is to be used in an Android environment. I've used SocketCAN including in the Linux kernel to create a socket and bind it to the CAN interface. The development environment…
J. Sugarbum
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socketcan alternative / add can0 to /dev/

I am currently working with CAN-BUS Systems. I make the CAN Interface available using sudo modprobe can sudo modprobe can-raw sudo modprobe mttcan sudo ip link set can0 type can bitrate 250000 sudo ip link set up can0 It now shows up in ifconfig…
Markus
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SocketCAN - device state "STOPPED"

I use a Raspberry Pi with the PiCAN board which uses a MCP2515 CAN controller. I use SocketCAN to read and write CAN messages via an application I wrote. After running a few weeks without a problem the controller is now in the state "STOPPED". What…
Timonysos
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SocketCAN read from socket only returns 11cobid

I am trying to read from a socketCAN and the msg is always filtered for the 11bit identifier. This should be a problem fixable with setting the rpoper flags for the 29bit identifier but I can`t find where if anyone can help... struct can_frame…
homer69
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Using Nettys epoll implementation for Linux SocketCAN communication

I am considering the usage of Netty as basis for the JavaCAN library, as it also uses NIO/epoll to access the Linux SocketCAN. What bothers me it the fact that the Netty epoll classes are written for network (IP) communication, not for the usage of…
Maik Scheibler
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Switching between can and vcan

I have read the documentation and I know that: To enable a real can you do $ sudo ip link set can0 type can bitrate 125000 $ sudo ip link set up can0 and to enable a vcan you do $ modprobe vcan $ sudo ip link add dev vcan0 type vcan $ sudo ip…
KansaiRobot
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