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CANcrypt and CANopen module

For Raspberry Pi and other embedded computing platforms

Published 2018-04-11

Emsa (formerly Embedded Systems Academy) offers the CANgine-Berry. It is an active CAN co-processor module that uses a regular UART communication channel towards the host system.

The CANgine-Berry is equipped with a custom boot-loader allowing the installation of one of the firmware packages provided by the company (Photo: Emsa)

With its independent 32-bit micro-controller, the product can execute CAN protocols with tough timing demands such as CANcrypt or CANopen with response times of under 10 ms. Depending on the configuration, the CAN communication can be up and running within 50 ms after power-on, even if the host system takes significantly longer to boot.

Available firmware options at launch include a generic minimal CANopen Manager/Controller and a CANopenIA Device both based on the CANopenIA implementation by the company. Within the next weeks they will also release a CANcrypt version of the Lawicel protocol (SLCAN).

The connection to the host system uses only four pins: Two for power (5 V) and two for the UART. The four-pin header row directly matches the Raspberry Pi pin layout, but also other common connectors. This includes USB-to-UART converter chips/modules, if the correct voltage levels are used (5 V supply, 3,3 V signals).

The serial protocol between host and CANopenIA is the CANopen remote access protocol by Embedded Systems Academy. It supports reporting events (new data arrived on CANopen side) as well as reading and writing data of the local Object Dictionary.

The CANopen Manager performs automatic network scans, simplifying application code as it can directly access the data scanned. CANopen Manager implementations also support read and write accesses to Object Dictionary entries of any node connected to the CANopen network.

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