15 Apr
2003
15 Apr
'03
9:01 p.m.
On Tuesday 15 April 2003 19.40, Martijn Sipkema
wrote:
[...]
Actually, from the specs:
"The default MaGIC frame timing is 48 kHz with an acceptable tolerance
of 80 picoseconds."
I think this needs to be implemented in hardware.
--ms
It will _not_ coexist with standard Ethernet
Right; it *can't*, unless all machines on the network have a hard real
time layer between the NICs and the protocol stacks. There are
protocols that would work for running RT streaming together with
normal network traffic, but there's no way around the fact that all
nodes must be hard real time. (Well, except for building it into the
hardware, perhaps...)
and I doubt a NIC can
be used because the timing is very critical.
That's not a problem normally, as most NICs have hardware latencies in
the microsecond range. All you need to implement hard QoS guarantees
is an RTOS, RT safe drivers and a suitable protocol.