Re: [RTnet-developers] RTnet port for Tricore?

[Jan K. <jan...@we...>]

Karl Reichert wrote:
> Hello all,
>=20
> is there any work done porting RTnet on tricore from Infineon?
>=20
> What do you think, how much work would it be, writing an ethernet drive=
r for RTnet for triboard 1130 NIC? I'm talking about a direct implementat=
ion, so no RTLinux like Xenomai/RTAI underneath.

On bare metal? No OS at all? Feasible, for sure. It's much like hacking
RTmac/TDMA (I suppose that is your goal) into Etherboot, see the old
patches. The basic TDMA support was fairly small code, just suffering a
bit from our lacking standardised format for transmitting the TDMA
configuration to the slaves (you will see the shell script parser in the
patch...). Additionally, I had to add high resolution timer support to
Etherboot.

The advantage of bare-metal RTnet clearly is that you can achieve very
low jitters for frame timing and time stamp synchronisation. Basically,
you should get into the region which Ethernet Powerlink reaches as well
by dedicating separate controllers on their protocol handling. I would
be very interested to hear about your experiences!

Jan