I'm on the first step of the project and I have to choose a complete system for my customer. I looking at the constraints both for hardware and software and the possibly dependency between them.
> I'm asking for the current state of the CAN implementation. Is it a > partial or a > complete implementation of the CAN standard? What are the guarantee > about real > time latency? What exactly do you mean with CAN standard? RT-Socket-CAN allows low-level access the CAN controller to send and receive messages, handle errors and set the bit-timing. Standard, extended and RTR frames are supported. Sorry, I've made a misunderstood about the CAN organization. In fact, the RT-Socket-CAN is a kind of user API for ease the use of CAN bus, isn't it? It seems that, generally, the handling of protocol, like the access to media or arbitration, is done in the chip. > I explored briefly the sources of Xenomai, and I read the file > "ksrc/drivers/can/README". Is it up-to-date? Is there really only > support for > the controllers listed in it? Mainly yes, what CAN controller would you like to use? Writing a RT-Socket-CAN driver is usually not a big deal. I asked this to point at the dependency between the software and the hardware. For time, the most part of boards that I've seen had the SJA100 controller, so that won't be a problem. > I've read in "RTDM and applications" that there would be an effort for > implementing a CANOpen profile. But, the implementation of CANOpen > protocol is > let to users? I can't find any newer reference for that in sources or in the > documentation of Xenomai. What is the state of this project? If you are looking for a free CANopen implementation, CANfestival might be an option, which also supports RT-Socket-CAN, IIRC. Check http://canfestival.org/ for further information. My client asks for a complete implementation of the CANOpen protocol. I will take all a look at this site and if it's clear for that use. > I've seen that there is currently only one implementation of a RT driver > for the > 16550A serial controller. Has anybody implemented it for other chip? What chip/hardware do you have in mind? Similarly to CAN hardware, almost the hardware that I've seen yet use this controller or a 8250 chip. Best regards, and really thanks for help, ================================= | BERRUER Sébastien | | Trainee at Altran Ouest | | Centre d'Affaires Alphasis | | 35760 Saint-Grégoire - FRANCE | | Tel: 06-76-35-29-55 | =================================
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