Welcome to my second newsletter and the first one I sent out by mail to my subscribers. Follow this link to read the full newsletter. Here is the table of contents.
Tag: CAN
Introduction to the SAE J1939 Standard
In the early days of controller area networks (CAN), every device manufacturer interpreted CAN frames in its own proprietary way. When you changed the engine of a harvester from Volvo to MAN, you would have to reimplement the communication with the engine from scratch. Fendt tractors wouldn’t be able to communicate with John Deere implements...
My talk “A Deep Dive into QtCanBus” at Qt World Summit 2019
The screenshot above shows the home screen of a sugar beet harvester. The home screen receives roughly 50 CAN messages per second and displays the contents of the CAN messages numerically or graphically.
Speaking CAN: Write Buffer Overflow
In the first post of the Speaking CAN series, we learned how the terminal sends a read-parameter request to the ECU and how the ECU sends a response with the value of the parameter back to the terminal. This works fine, as long as the terminal does not send too many requests too fast. We...
Speaking CAN: Request and Response
Controller Area Networks (CANs, for short) are used for the communication between electronic control units (ECUs) in cars, trucks, tractors, harvesters, construction machines, packaging lines and e-bikes. Qt provides the Qt CAN Bus API as part of its QtSerialBus module. Qt CAN Bus provides a clean and simple API to connect to a CAN bus,...