Questions tagged [can]
CAN stands for Controller Area Network and is a bus often used in automotive applications. It is a two-wire differential protocol and works on baud rates from 10 kbits/sec to 1 Mbits/sec.
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Current Consumption of CANbus (CANH and CANL)
I'm looking to use the SN65HVD230 CAN transceiver but had a question about the current consumption.
Datasheet: http://www.ti.com/lit/ds/symlink/sn65hvd230.pdf
In table 8.3 Recommended Operating ...
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Using an MCU with built-in CAN controller vs. external CAN controller
I'm planning to use the Atmel ATSAMC21J18A microcontroller in an automation project which has a built-in CAN controller. The CAN bus network may contain 32 devices, each generating data packets in 1 ...
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How to leverage CAN bus Mailboxes in my embedded systems?
I don't understand how to leverage CAN bus Mailboxes in my embedded systems.
I think I don't use them properly because I don't understand the problem they are trying to solve.
Here's a simple example ...
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How can CAN transceivers ouput CANH=3.5V and CANL=1.5V?
When sending a dominant bit (0bit) on the CAN bus, I understand that CAN transceivers output CANH=3.5V and CANL=1.5V.
But when looking at the schematics of a CAN transceiver, I do not understand how ...
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BeagleBone Black CAN bus setup
I am trying to connect to a CAN bus network with my BeagleBone Black and SN65HVD230. I've connected it like in the picture.
I am running:
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Ethernet vs CAN bus physical signal
Reading about Controller Area Networks and Ethernet standard, I cannot understand why there is a difference in the way the signal is transmitted. Both protocols use twisted pair cables to communicate, ...
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CAN bus TX failing in a strange way
I have been trying to pass CAN frames between two different CAN busses using two different CAN channels on a STM32F746 MCU. The system always fails and freezes up in TX when it is supposed to be ...
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ATSAMC21 - CAN configuration - Nominal bit timing vs. data bit timing & time quanta calculation
I'm trying to configure the CAN bit rate of an ATSAMC21 to 125ksps in a CAN2.0B configuration.
However, after reading through the datasheet, the ASF documentation and the ATMEL start help I'm confused....
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STM32 CAN bus Rx interrupt only triggers in loopback mode
I'm designing the CAN interface for a STM32F042C4T6 to be able to receive and send messages. I've tested my code and everything seems to work perfectly fine in loopback mode. However, when I hook up ...
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Isolated CAN transceivers as a CAN bus extender
I am designing a system to 'hack' into a CAN bus. My first idea was to split the target CAN bus, terminating both ends into isolated CAN transceivers, and use a MCU to pass packets between the buses ...
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CAN Bus on PCB board
Will a CAN bus also work for on-board communication, without twisted pair cabling, between 2 or more microcontrollers on the same PCB board?
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Interoperability between regular and single-wire CAN bus
Is it possible to connect a regular CAN transceiver (ISO 11898-1) to a single-wire CAN bus (SAE J2411) in a compatible way? By "compatible" I mean that the whole system should support valid J2411 bus ...
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Electronically connecting/disconnecting device from a CAN bus
What I'm trying to do can be best described by the following circuit based on an electromechanical relay:
simulate this circuit – Schematic created using CircuitLab
However, is there a simpler ...
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CAN FD bit stuffing
Ok, it may be just peanuts, but here
the author says that the max. length (i.e. max. bit stuffing) of the flexible data rate part of a 64 Byte payload frame is 673 bit (Figure 6).
That part consists ...
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MCP2515, CAN bus, and transmission failure
I'm trying to interface with a GPS device that is intended to connect with a vehicle via the CAN bus. I'm using an MCP2515, driven via SPI by a Parallax Propeller project board. I've successfully been ...
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