Sebastian Smolorz wrote: > Oliver Hartkopp: >> The problem is to define what a dlc > 8 provided by the CAN controller >> (which IS a BUG inside the CAN controller!) should mean to the rest of >> the data inside the registers containing the received CAN frame: >> >> - do we assume the rest to be a valid CAN frame? >> - should we drop the frame ? > > The Bosch CAN specification revison 2.0 part B says that a reaction to a DLC >> 8 is not defined but the reference CAN model defines as de-facto standard > the assumption that if DLC > 8 then DLC := 8.
So we limit to 8 and do not drop the frame and just handle it like it's a totally valid frame with dlc == 8. The question remains, do we want to print out an error message or maybe a can error frame? cheers, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Linux Solutions for Science and Industry | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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