From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Keith Jones <keith.rjones@yahoo.com>
Cc: "linux-can@vger.kernel.org" <linux-can@vger.kernel.org>
Subject: Re: [Socketcan-users] Flexcan on i.mx536 Infotainment Platform
Date: Mon, 04 Jun 2012 23:52:57 +0200 [thread overview]
Message-ID: <4FCD2E39.3060809@pengutronix.de> (raw)
In-Reply-To: <1338845698.76889.YahooMailNeo@web140802.mail.bf1.yahoo.com>
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Hello Keith,
please switch to the "linux-can@vger.kernel.org" mailinglist, the
berlios list is obsolete.
On 06/04/2012 11:34 PM, Keith Jones wrote:
> I booted up my new Infotainment demo board after ported 2.6.39
> flexcan (flexcan.h flexcan.c) support into my 2.6.35 linux distro.
Use v3.4 or better, this version contains some vital fixes against error
irq floods.
> After seeing flexcan driver register and performing the following
> commands, I get constant interrupts and error packets visualized
> using my Canoe CANbus sniffer. I am using 250K baud. Did not check
> termination. No oscilloscope was used as yet. Can not receive any
> packets. can state goes from ERROR-ACTIVE to ERROR-PASSIVE.
Please check the Termination, do you have a second CAN member on the bus?
> Any clues?
> root@freescale ~$ cansend can0 123#1122334455
> root@freescale /usr/bin$ ip -d -s link show can0
> 2: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10
> link/can
> can state ERROR-PASSIVE (berr-counter tx 128 rx 0) restart-ms 0
> bitrate 250000 sample-point 0.875
> tq 250 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
> flexcan: tseg1 4..16 tseg2 2..8 sjw 1..4 brp 1..256 brp-inc 1
> clock 24000000
> re-started bus-errors arbit-lost error-warn error-pass bus-off
> 0 0 0 5 5 0
> RX: bytes packets errors dropped overrun mcast
> 80 10 0 0 0 0
> TX: bytes packets errors dropped carrier collsns
> 5 0 0 0 0 0
If the tx error counter goes up, the device may be the only device on
the CAN bus. Your sniffer is probably totally passive, which means it
doesn't qualify as a second station.
cheers, Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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next parent reply other threads:[~2012-06-04 21:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1338845698.76889.YahooMailNeo@web140802.mail.bf1.yahoo.com>
2012-06-04 21:52 ` Marc Kleine-Budde [this message]
2012-06-04 21:55 ` [Socketcan-users] Flexcan on i.mx536 Infotainment Platform Marc Kleine-Budde
2012-06-05 5:00 ` Keith Jones
[not found] ` <4FD9DB62.50302@grandegger.com>
2012-06-15 5:51 ` Wolfgang Grandegger
2012-06-15 6:42 ` Wolfgang Grandegger
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