On 07/10/2012 11:03 AM, Sunetra Sashi wrote:
On Tue, Jul 10, 2012 at 4:40 AM, Philippe Gerum <r...@xenomai.org
<mailto:r...@xenomai.org>> wrote:
On 07/10/2012 04:30 AM, Sunetra Sashi wrote:
Hi,
I am trying to use the XDDP module in order to achieve
linux-xenomai domain
cross communication. However, when I install my module which
creates a
socket and binds its to the XDDP port, via the
*rtdm_socket(AF_RTIPC,
SOCK_DGRAM, IPCPROTO_XDDP)* call, it fails. Also, when I try to
open the
device on the linux side, via an *rtdm_open("/dev/rtp0",
O_RDWR)*, it also
fails.
Please report issues with all details, typically error codes and
return values. "call fails" is not enough.
rtdm_socket call fails with error code 97. The rtdm_open fails with
error code 19.
Although using rtdm_open() for /dev/rtp0 may work, this
Actually, no it won't. What would work is opening a RTDM device via the
wrapped open() call routed to the Xenomai system, which is the converse way.
pseudo-device file should be opened using a plain open(2) call,
since we want to open the regular linux-side endpoint for the
communication.
I am making these calls from within the kernel, not from user space.
Hence I ended up using rtdm calls instead
/dev/rtp0 is a non-real-time user-space endpoint for the communication,
between a regular linux application and a real-time component. It does
not make sense to open it from kernel space.
Do I need to install any specific xenomai modules for this to work?
Obviously, yes. Check IPC drivers in the "Drivers" sub-menu of the
Xenomai configuration. You need to have
CONFIG_XENO_DRIVERS_RTIPC_XDDP enabled.
I already checked this in the configuration, It is enabled. Should this
also be set to y? CONFIG_XENO_DRIVERS_RTIPC. In my configuration it is
set to m.
Did you load the xeno_rtipc module then?
Should I see any modules loaded in /proc/xenomai/rtdm/protocol_devices?
Yes.
Thanks
Shweta
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--
Philippe.
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Philippe.
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