[etherlab-users] Controlled by userspace application

Frank Werner etherlab at wesoft.de
Tue Feb 5 18:05:24 CET 2008

> On Mon, Feb 04, 2008 at 08:43:47PM +0100, Frank Werner wrote:
>> Is there a possibility to determine the PDO mapping at runtime within
>> the
>> kernel module?
> No, but this does not make sense in most cases, because you'll have to
> know exactly, which PDO entries you want to use, anyway. The master
> usually is the one, that defines the bus configuration and the mapping.

Because the master defines the bus configuration I could ask the master
about the configuration, or I am wrong?

The PDO for the EL2004 is at 0x7000:1. Is this adress static? You say the
master defines this adress. What depends this adress on?

Is there some documentation about the whole relation?

> Anyway, the next EtherCAT master release 1.4.0 will support you with
> this task by supplying tools to create a valid configuration based on
> the existing slaves and their current mapping.

Will this be a kernel function or a userspace tool? Are there beta
versions at this time?

Thanks for your support.


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