Abstract
Controller area network (CAN) data link layer is the interface between CAN physical layer and the microcontroller, containing the actual control software. The interface towards the microcontroller consists of mailboxes for receiving and sending in conjunction with the corresponding flags such as transmission-request-flag, receive-flag, etc., and further status-signal signalling errors, etc. Towards the bus, the interface performs synchronization and arbitration as well as error handling and finally the bitwise receive and transmission of data streams.
Any implementation must be compliant with the standard which is mostly concerned with all bus-related signals and their processing. Nevertheless, there is freedom to the implementers especially with respect to the implementation of the microcontroller interface. Besides, for instance, the number and the architecture of the mailboxes, their message filtering technique differs between many suppliers.
This chapter depicts five different solutions in their details, including a solution for a CAN field-programmable gate array (FPGA) implementation.
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© 2013 Springer-Verlag London
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Lawrenz, W., Hartwich, F., Kelling, U., Krishna, V., Lieder, R., Riekert, P. (2013). Data Link Layer Implementation. In: Lawrenz, W. (eds) CAN System Engineering. Springer, London. https://doi.org/10.1007/978-1-4471-5613-0_3
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DOI: https://doi.org/10.1007/978-1-4471-5613-0_3
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Publisher Name: Springer, London
Print ISBN: 978-1-4471-5612-3
Online ISBN: 978-1-4471-5613-0
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