Karl Reichert wrote: >> Karl Reichert wrote: >>>> Karl Reichert wrote: >>>>>> Karl Reichert wrote: >>>>>>> When using the tdmacfg-tool, one can specify an offset. Reading >>>>>> TDMA-Spec line 568: >>>>>>> "If <offset> is given, the time slot is added or modified to send >> data >>>>>> with the specified offset in microseconds relative to the scheduled >>>> cycle >>>>>> start [...]" >>>>>>> To my understanding this means, doing 'tdmacfg rteth0 slot 0 0' >> means >>>>>> that you would override the sync frame slot. Or is there a mistake in >>>> the >>>>>> spec and one should read: >>>>>>> "[...] specified offset in microseconds relative to the scheduled >> sync >>>>>> frame start [...]" >>>>>> >>>>>> The cycle start is defined by the sync frame. No sync frame, no >> cycle. >>>>>> Thus the former implies the latter. So you cannot use the "slot" >>>> command >>>>>> of tdmacfg to manipulate sync frames, there is "master" for this >> (also >>>>>> to define a backup master sync frame slot). >>>>>> >>>>>> Jan >>>>>> >>>>> Okay, thanks, so it makes sense. >>>>> >>>>> When I execute this command, I get an error because I don't have the >>>> device /dev/rteth0. When is it created or do I have to create it by >> hand (with >>>> which parameters)? >>>> >>>> Assuming you mean /dev/rtnet -> see README. >>>> >>>> Jan >>>> >>> No, /dev/rtnet I created as mentioned in README. I'm talking about >> rteth0 and rtlo. They don't exist, although I configured RTnet (make >> menuconfig) >> to also build RTcap and RTloopback support. >> >> And did you load those drivers as README tells you...? >> > Yes, I did. This is my startup script: > > > > #!/bin/bash > > #set -v on > set -x on > > insmod /usr/local/rtnet/modules/rtnet.ko || exit 1 > insmod /usr/local/rtnet/modules/rtpacket.ko || exit 1 > insmod /usr/local/rtnet/modules/rt_e1000.ko cards=1,0,0,0 || exit 1 >
Check if rteth0 is actually popping up under /proc/rtnet/devices. Maybe you forgot to unload/disable the Linux driver. > > > ############################################################################### > # start of configuration depending on use of loopback and/or capturing device > ############################################################################### > #comment following line if no loopback interface > insmod /usr/local/rtnet/modules/rt_loopback.ko || exit 1 > > #comment following line if no capture interface > insmod /usr/local/rtnet/modules/rtcap.ko || exit 1 > > #comment following line if no loopback interface > /usr/local/rtnet/sbin/rtifconfig rtlo up 127.0.0.1 > > #comment following TWO lines if no capture interface > ifconfig rteth0 up > ifconfig rteth0-mac up > #comment following line if no capture interface > #OR capture interface but no loopback interface > ifconfig rtlo up > ############################################################################### > # end of configuration depending on use of loopback and/or capturing device > ############################################################################### > > > > insmod /usr/local/rtnet/modules/rtmac.ko > insmod /usr/local/rtnet/modules/tdma.ko > > > > ############################################################################### > # start of TDMA configuration (all values in ms) > ############################################################################### > #put your TDMA cycle time here (last number) > /usr/local/rtnet/sbin/tdmacfg rteth0 master 5000 > #put your TDMA offset related to scheduled cycle start here (last number) > /usr/local/rtnet/sbin/tdmacfg rteth0 slot 0 0 > ############################################################################### > # end of TDMA configuration > ############################################################################### > "rtifconfig rteth0 up [some-IP-if-desired]" is missing. This was included in your first script version, wasn't it?
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