Re: Visit

Hello John

One thing I've noticed is that CAN driver implementations usually
use a fifo style send buffer, letting low priority messages block the
queue, when there's a higher priority message that should really
be sent first.

Some discussion on this would probably be useful.

Simon

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On 19.11.2016 11:46, John Dammeyer wrote:
>
> Hi everyone,
>
> I know this isnÂ’t directly CAN bus related but I had the pleasure of a 
> visit with Lars-Berno Fredriksson from KVASER today.Been a few years 
> since I met him.Got caught up on all the CAN and CANFD things that his 
> company is doing.
>
> As we discussed the olden days when even CAN drivers werenÂ’t available 
> yet, I realized how much I missed the detailed discussions on the 
> working of the CAN bus.ItÂ’s true though, there are many experts out 
> there now who have lots of experience and the internet is full of 
> reference information that wasnÂ’t around 20 years ago.Companies like 
> Microchip have their own forums and often people interested in the CAN 
> bus never even make it to this list.
>
> Browsing through some of the messages from the comp.arch.embedded 
> UseGroup in 1995, the names of the contributors are Ken Tindell, Edwin 
> Armstrong, Olaf Pfeiffer, Stephen Pelc and there is a rich amount of 
> information about CAN.Ken Tindell started this list that was 
> eventually and is now graciously supported and maintained by Vector.
>
> IÂ’ve been asked a number of times to put my experience down into 
> either a book or a series of essays on CAN bus.IÂ’ve been fortunate 
> enough to have had a set of interesting experiences.Even to being on a 
> team developing and extension of the CAN bus to run on powerline and 
> deliver Ethernet Connectivity with up to 4K byte packets between the 
> arbitration and the CRC.In many ways CAN FD is a subset of that 
> original design.
>
> Anyway, IÂ’d like to get some feedback on what might be interesting in 
> a book or a series of essays.ThereÂ’s already lots on the low level 
> stuff.Less on High Level Protocols and whatÂ’s there is often deep into 
> the details.Maybe more implementation examples and how itÂ’s done?
>
> So the floor is open.LetÂ’s have a discussion on what isnÂ’t well 
> documented.
>
> Thanks
>
> John Dammeyer
>
> "ELS! Nothing else works as well for your Lathe"
>
> Automation Artisans Inc.
>
> http://www.autoartisans.com/ELS/
>
> Ph. 1 250 544 4950
>