App note from Holtek on their CAN Bus controller chip HT45B3305H. Link here (PDF) Holtek has released a CAN Bus interface control device, the HT45B3305H. The CAN physical layer can support high-speed networks up to 1 Mbit/s and supports the CAN 2.0A/B protocol as well as conforming to the ISO11898-1:2003 specification. It has 32 internal […]
Tag Archives: CAN-bus
The CAN bus
Jean-Claude has made a series of blog posts on using the Controller Area Network (CAN) bus: This is the first of what I expect to become a multi-part article series on the CAN bus. I’d like to describe the features of CAN which I find particularly elegant and useful, and will introduce a simple driver […]
CANable: the open source USB to CAN adapter
An open-source USB to CAN adapter: It supports CAN bit-rates of up to 1 Mbit/s. The product comes with an open-source SocketCAN driver software. It features a Micro-USB connector and a 4-pin screw terminal with CAN_H, CAN_L, 5-V supply, and ground. The CANable device is a hardware clone of Eric Evenchick’s CANtact project, an open-source […]
App note: CAN Bus – Common high speed physical layer problems
App note from Vector on three commonly encountered high speed CAN physical layer problems – bus termination, signal levels, and ground. Link here (PDF) Determining the exact cause of a CAN problem is not at all simple. Is the problem in hardware or software? Is the problem on the circuit board or on the CAN […]
App note: iCoupler® Isolation in CAN bus applications
Application note from Analog Devices on CAN bus system isolation. Link here (PDF) The intention of this application note is to give the user a brief overview of the CAN bus protocol, focusing on the system physical layer, as well as an understanding of why isolation is so important to the system. This application note […]
Bus pirate used to hack into a car
Nilsson writes to inform us that he spotted a Bus Pirate in a video from Vice News, “How to hack a car: Phreaked Out (episode 2)” From his laptop, he was able to manipulate the car’s engine, brakes and security systems by wirelessly tapping into the Controller Area Network, or CAN bus, network. Without getting too deep into […]
Ford’s OpenXC vehicle data bus interface project
At the 2013 Consumer Electronics Show (CES) Ford announced their OpenXC project, a combination of open source hardware and software that lets you extend your vehicle with custom applications and pluggable modules. It uses standard, well-known tools to open up data from the vehicle to developers. The OpenXC team explains, “OpenXC is an API to […]
Connecting a smart house over the CAN bus update
Rynius is automating his house using the CAN bus. He hit some issues with noise in the cabling, which he identified and documented the fix. I had trouble finding wire for the bus and ended up using security cable. Unfortunately it picked up a 60 Hz wave, so I had to add some caps to […]
CAN-BUS based OBD reader
Debraj has been developing a project to read the OBD information through CAN bus. His design is based on the dsPIC33FJ128MC802 (3.3V) and MCP2551. He is using a factory stock OBD cable and feeding the data into a jack on the project board. The data is displayed on a 16×4 LCD and includes engine RPM, […]
Connecting a smart house over the CAN bus
Rynius has been working on his CAN house project. The CAN bus is a multi-master serial protocol that was initially designed for integrating sensors and microcontrollers in vehicles. I’m trying to automate my house using a CAN-bus. The first phase is two nodes, one at the front to collect data, and one in the kitchen […]