[etherlab-users] PDO mapping?

[Florian Pose]

On Fri, May 29, 2009 at 05:36:05PM +0200, Uwe Hermann wrote:
> On Fri, May 29, 2009 at 03:44:52PM +0200, Florian Pose wrote:
> > On Fri, May 29, 2009 at 11:40:14AM +0200, Julian Stoev wrote:
> > > But this PDO warnings... depending on the simulink diagram, sometimes
> > > they are not present, sometimes they are present. What may be the
> > > reason for them?
> > 
> > It depends which slave hardware version you have. Older slaves have
> > different PDO indices and the right ones must be selected in the mask
> > field "device type".
> > 
> > > Another issue: during the compilation of the kernel module on the
> > > target machine I get these:
> > > 
> > > WARNING: "ecrt_master_receive"
> > > [/home/jsto/Desktop/t1_etl_rtw/t1_kmod.ko] undefined!
> > > 
> > > Is this normal?
> > > We will have to program quite a complex robotics application and I
> > > must be sure I understand everything well.
> > 
> > See
> > http://lists.etherlab.org/pipermail/etherlab-users/2008/000077.html
> 
> The errors can be fixed by copying the Module.symvers file which will be
> generated during the build of ethercat itself into the "mini" (or
> whatever your module name is, seems to be "t1_etl_rtw" for you) directory
> before running 'make modules' there.
> 
> I believe this is a kernel build system bug, in theory 'make
> modules_install' of the ethercat modules should also update the global
> symvers file with the new symbols, but it doesn't see to do that
> properly.

My colleague Richard Hacker implemented a feature which allows passing
an KBUILD_EXTRA_SYMBOLS variable containing additional symbol files,
that is already present in newer kernels. We'll also include that in the
EtherCAT/EtherLab code.

-- 
Best regards,
Florian Pose

http://etherlab.org