Dear Jan,
Here the result for the ping -s 65000 from At91 to the Slave. It seems
alright.
Regards,
Chun Yeow
[EMAIL PROTECTED]:/usr/rtnet] cat
/proc/rtnet/rtcfg/rteth0/CLIENT_172.16.6.174
state: 3 (READY)
flags: 02
stage 1 size: 66
stage 2 filename: -
stage 2 size: 0
stage 2 offset: 0
burstrate: 0
mac address: 00:C0:8B:08:81:AB
ip: 172.16.6.174
[EMAIL PROTECTED]:/usr/rtnet] cat /proc/rtnet/rtcfg/rteth0/station_list
00:C0:8B:08:81:AB 02
[EMAIL PROTECTED]:/usr/rtnet] ./sbin/rtifconfig
rteth0 Medium: Ethernet Hardware address: 14:09:07:05:05:02
IP address: 172.16.6.203 Broadcast address: 172.16.6.255
UP BROADCAST RUNNING MTU: 1500
rtlo Medium: Local Loopback
IP address: 127.0.0.1
UP LOOPBACK RUNNING MTU: 1500
[EMAIL PROTECTED]:/usr/rtnet] ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:416 (416.0 B) TX bytes:416 (416.0 B)
vnic0 Link encap:Ethernet HWaddr 14:09:07:05:05:02
inet addr:172.16.6.203 Bcast:172.16.6.255 Mask:255.255.255.0
UP BROADCAST RUNNING MTU:1496 Metric:1
RX packets:861 errors:0 dropped:0 overruns:0 frame:0
TX packets:861 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1219028 ( 1.1 MiB) TX bytes:1227470 (1.1 MiB)
[EMAIL PROTECTED]:/usr/rtnet] ping -s 65000 172.16.6.174
PING 172.16.6.174 (172.16.6.174): 65000 data bytes
65028 bytes from 172.16.6.174: icmp_seq=0 ttl=64 time=321.9 ms
65028 bytes from 172.16.6.174: icmp_seq=1 ttl=64 time=281.8 ms
65028 bytes from 172.16.6.174: icmp_seq=2 ttl=64 time=283.1 ms
65028 bytes from 172.16.6.174: icmp_seq=3 ttl=64 time=285.5 ms
65028 bytes from 172.16.6.174: icmp_seq=4 ttl=64 time=280.3 ms
65028 bytes from 172.16.6.174: icmp_seq=5 ttl=64 time=283.2 ms
65028 bytes from 172.16.6.174: icmp_seq=6 ttl=64 time=288.9 ms
65028 bytes from 172.16.6.174: icmp_seq=7 ttl=64 time=275.7 ms
65028 bytes from 172.16.6.174: icmp_seq=8 ttl=64 time=293.5 ms
65028 bytes from 172.16.6.174: icmp_seq=9 ttl=64 time=275.0 ms
--- 172.16.6.174 ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max = 275.0/286.8/321.9 ms
On 10/30/07, Jan Kiszka <[EMAIL PROTECTED]> wrote:
> >
> > Yeoh Chun Yeow wrote:
> > > Dear Jan
> > >
> > > Can you explain the tdma configuration of "slot 1 0 1/1 1500 1"?
> >
> > First of all, this was early-morning nonsense, must rather read:
> >
> > slot 2 0 1/1 1500 0
> >
> > Translation: Create a TDMA slot, ID 2 (first arg), offset 0 us relative
> > to each TDMA Sync (second arg), period 1/1, i.e. use every TDMA cycle
> > (third arg), 1500 byte payload (fourth arg), and join this slot with the
> >
> > one of ID 0 (fifth arg). For more details, see README.rtmac (hmm, it's
> > is failing to mention the fifth argument, too bad...).
> >
> > >
> > > And how should I configure the cycle (previously in the rtnet.conf , I
> > set
> > > the TDMA cycle to 2000 and TDMA offset to 500) and the slave?
> >
> > Please check the README first, it should explains this.
> >
> > >
> > > Is it ok for me to use the default configuration in tdma config
> > script?
> >
> > As a basis, yes.
> >
> > >
> > > I have ensure that AT91 acts as the master and it is able to ping the
> > slave
> > > using rtping after the completion of TDMA setup. So is this enough?
> >
> > To be safe, apply the above configuration and run a test with larger
> > ping frames (ping -s ...). Maybe the time for returning some
> > transmission buffer from the hardware back to the OS is actually so
> > short here that a TX queue is not needed. But my feeling is not yet that
> > optimistic.
> >
> > Jan
> >
> >
> >
>
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