Re: [Xenomai-help] CAN question

[Jan Kiszka <jan.kiszka@domain.hid>]

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roland Tollenaar wrote:
> Hi,
> 
> In choosing listen_only or Loop_back. What am I actually selecting?
> The documentation only tells me that the parameter sets loop_back or
> listen_only mode. Not what the difference is between those modes.
> Again one of those general network programming features I presume.

Both modes affect the controller directly if it supports it. Listen-only
means that this CAN node will not acknowledge incoming frames even if
they are correct, it will just sit there and sniff passively.

Loopback means that the hardware emulates a fully working bus (i.e.
correctly terminated) with only one node that simply receives what it sends.

[Granted, documentation might be improvable here for CAN beginners.
Still, you need basic some CAN understanding to deal with real-life
issues anyway.]

> 
> When working with the virtual device. Does it matter which mode is chosen?

Nope, none of them is emulated so far.

Jan


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