On 05/13/2011 12:09 PM, Willy Lambert wrote: > 2011/5/13 Wolfgang Grandegger <[email protected]> > >> Hi Willy, >> >> On 05/13/2011 10:42 AM, Willy Lambert wrote: >>> 2011/5/3 Willy Lambert <[email protected]> >>> >>>> Hi all, >>>> >>>> I have a "visibly working" can network but some arbitration errors often >>>> occur. I am using socket_can under canfestival and have configure a set >> of 3 >>>> node (0x05,0x32,0x33) with periodic PDO (TX and RX) plus a nodeguarding >> on >>>> each node. The bus is at 250K and the period of the SYNC word is 10ms. >> Here >>>> is the candump extract of a period (there are always in the same order) >> : >>>> >>>> can1 80 [0] >>>> can1 332 [5] 93 00 00 00 00 >>>> can1 1B2 [2] 27 00 >>>> can1 20000002 [8] 01 00 00 00 00 00 00 00 ERRORFRAME >>>> can1 1B3 [2] 27 00 >>>> can1 20000002 [8] 02 00 00 00 00 00 00 00 ERRORFRAME >>>> can1 2B2 [6] 93 00 00 00 00 01 >>>> can1 20000002 [8] 02 00 00 00 00 00 00 00 ERRORFRAME >>>> can1 2B3 [6] 93 00 00 00 00 01 >>>> can1 333 [5] 93 00 00 00 00 >>>> can1 3B2 [7] 00 00 00 00 04 00 0A >>>> can1 3B3 [7] FE FF FF FF 02 00 0A >>>> can1 705 [0] remote request >>>> can1 732 [0] remote request >>>> can1 733 [0] remote request >>>> can1 705 [1] 05 >>>> can1 732 [1] 05 >>>> can1 733 [1] 05 >>>> >>>> >>>> Here is some additionnal stats : >>>> root@beta:~# ip -d -s link show can1 >>>> 4: can1: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN >>>> qlen 10 >>>> link/can >>>> can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 1000 >>>> bitrate 250000 sample-point 0.875 >>>> tq 250 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1 >>>> sja1000: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1 >>>> clock 8000000 >>>> re-started bus-errors arbit-lost error-warn error-pass bus-off >>>> 0 0 9684 0 0 0 >>>> RX: bytes packets errors dropped overrun mcast >>>> 225353 84576 0 0 0 0 >>>> TX: bytes packets errors dropped carrier collsns >>>> 32163 66462 9684 0 0 0 >>>> root@beta:~# >>>> >>>> >>>> Should I ignore these errors ? Should I review my scheduling ? >>>> >>> >>> My I bump this ? If the question is mal-formed or innapropriate on this >>> mailing liste please tell me so I don't wait for an answer :p >> >> The error is definitely reported by the CAN controller and therefore >> it's due to an electrical problem on the CAN bus. Well, I'm not a CAN >> *hardware* expert and therefore I can't tell if such error do harm or >> can even be ignored. Googling for "can arbiration lost" revealed: >> >> >> http://www.cancapture.com/knowledgebase/18-cancaptureknowledgebase/33-kb-arbitration-lost-error-messages.html >> >> which seem to answer you question to some extend. >> > > Thanks, your are really better than me in googleling
Does that document explain your problems? I mean, do you have more than one node sending CAN messages? > Is there a mean to disable this error un socketCan ? No, but it will only be delivered to user-space sockets on request (via setsockopt ...). Wolfgang. _______________________________________________ Socketcan-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/socketcan-users
