From: Wolfgang Grandegger <wg@grandegger.com>
To: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Cc: socketcan-core@lists.berlios.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: About bittiming calculation result
Date: Tue, 08 Feb 2011 08:57:14 +0100 [thread overview]
Message-ID: <4D50F75A.5040700@grandegger.com> (raw)
In-Reply-To: <93C12206407640199DCDD3A89A333F13@hacdom.okisemi.com>
Hi Tomoya,
On 02/08/2011 02:27 AM, Tomoya MORINAGA wrote:
> On Tuesday, February 08, 2011 12:53 AM, Wolfgang Grandegger wrote:
>
>> BTW, it's always possible to specify optimized bit-timing
>> parameters directly, e.g. the following seem better:
>>
>> 800000 60 12 4 4 4 3 793650 0.8% 80.0% 81.0% 1.2%
>>
>> You could set these with:
>>
>> $ ip link set can0 type can \
>> tq 60 prop-seg 12 phase-seg1 4 phase-seg2 4 sjw 4
>
> I can confirm 800K comms works well using the above.
Cool, I got these magic values from a CAN hardware expert.
> I wish Can-core could calculate like above.
Me too! I also got some indication on how to improve our algorithm in
case the bit-rate does not match. Hope to find some time soon to work
on this issue.
>>> seg1/seg2/sjw/prop_seg must be more than 1 ?
> BTW, according to EG20T PCH data sheet,
> CAN bit-timing parameters(BRP, Prop_Seg, Phase_Seg1, Phase_Seg2, SJW) must not be set 0.
OK, then please provide a patch setting tseg1_min to 2.
Wolfgang.
next prev parent reply other threads:[~2011-02-08 7:55 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1296818921.git.segoon@openwall.com>
2011-02-04 12:23 ` [PATCH 01/20] mach-omap2: mux: world-writable debugfs files Vasiliy Kulikov
2011-02-04 20:09 ` Tony Lindgren
2011-02-04 12:23 ` [PATCH 02/20] mach-omap2: pm: world-writable debugfs timer files Vasiliy Kulikov
2011-02-04 20:10 ` Tony Lindgren
2011-02-04 22:53 ` Kevin Hilman
2011-02-04 12:23 ` [PATCH 03/20] mach-omap2: smartreflex: world-writable debugfs voltage files Vasiliy Kulikov
2011-02-04 20:10 ` Tony Lindgren
2011-02-04 22:54 ` Kevin Hilman
2011-02-07 5:33 ` Menon, Nishanth
2011-02-04 12:23 ` [PATCH 04/20] mach-ux500: mbox-db5500: world-writable sysfs fifo file Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 05/20] leds: lp5521: world-writable sysfs engine* files Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 06/20] leds: lp5523: world-writable engine* sysfs files Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 07/20] video: sn9c102: world-wirtable " Vasiliy Kulikov
2011-02-04 15:29 ` Mauro Carvalho Chehab
2011-02-04 20:28 ` Luca Risolia
2011-02-04 12:23 ` [PATCH 08/20] mfd: ab3100: world-writable debugfs *_priv files Vasiliy Kulikov
2011-02-18 17:01 ` Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 09/20] mfd: ab3500: world-writable debugfs register-* files Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 10/20] mfd: ab8500: " Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 11/20] misc: ep93xx_pwm: world-writable sysfs files Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 12/20] net: can: at91_can: " Vasiliy Kulikov
2011-02-04 12:42 ` Kurt Van Dijck
2011-02-04 21:06 ` David Miller
2011-02-07 11:38 ` About bittiming calculation result Tomoya MORINAGA
2011-02-07 12:00 ` Wolfgang Grandegger
2011-02-07 15:52 ` Wolfgang Grandegger
2011-02-08 1:27 ` Tomoya MORINAGA
2011-02-08 7:57 ` Wolfgang Grandegger [this message]
2011-02-08 1:09 ` Tomoya MORINAGA
2011-02-08 3:29 ` Bhupesh SHARMA
2011-02-08 4:11 ` Tomoya MORINAGA
2011-02-04 12:23 ` [PATCH 13/20] net: can: janz-ican3: world-writable sysfs termination file Vasiliy Kulikov
2011-02-04 21:06 ` David Miller
2011-02-04 12:23 ` [PATCH 14/20] platform: x86: acer-wmi: world-writable sysfs threeg file Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 15/20] platform: x86: asus_acpi: world-writable procfs files Vasiliy Kulikov
2011-02-04 12:53 ` Corentin Chary
2011-02-04 12:24 ` [PATCH 16/20] platform: x86: tc1100-wmi: world-writable sysfs wireless and jogdial files Vasiliy Kulikov
2011-02-04 12:24 ` [PATCH 17/20] rtc: rtc-ds1511: world-writable sysfs nvram file Vasiliy Kulikov
2011-02-04 12:24 ` [PATCH 18/20] scsi: aic94xx: world-writable sysfs update_bios file Vasiliy Kulikov
2011-02-04 12:24 ` [PATCH 19/20] scsi: iscsi: world-writable sysfs priv_sess file Vasiliy Kulikov
2011-03-13 8:28 ` Mike Christie
2011-02-04 12:24 ` [PATCH 20/20] fs: ubifs: world-writable debugfs dump_* files Vasiliy Kulikov
2011-02-06 15:16 ` Artem Bityutskiy
2011-02-21 11:42 ` [PATCH 00/20] world-writable files in sysfs and debugfs Samuel Ortiz
2011-03-12 20:23 ` Vasiliy Kulikov
2011-03-14 22:18 ` [Security] " Andrew Morton
2011-03-15 2:26 ` James Bottomley
2011-03-15 3:09 ` [Security] " Greg KH
2011-03-15 11:50 ` James Bottomley
2011-03-15 14:18 ` Greg KH
2011-03-15 14:25 ` James Bottomley
2011-03-15 16:08 ` Vasiliy Kulikov
2011-03-15 16:32 ` James Bottomley
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