From: Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public•gmane.org>
To: Tomoya MORINAGA <tomoya-linux-ECg8zkTtlr0C6LszWs/t0g@public•gmane.org>
Cc: socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public•gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public•gmane.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-c0cKtqp5df7I9507bXv2FdBPR1lH4CV8@public.gmane.org>
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 7:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-04 12:22 [PATCH 00/20] world-writable files in sysfs and debugfs Vasiliy Kulikov
2011-02-04 12:23 ` [PATCH 12/20] net: can: at91_can: world-writable sysfs files Vasiliy Kulikov
[not found] ` <a6800dc8b0daed78256f98f52844cbbb48f4a76d.1296818921.git.segoon-cxoSlKxDwOJWk0Htik3J/w@public.gmane.org>
2011-02-04 12:42 ` Kurt Van Dijck
[not found] ` <20110204124233.GB334-MxZ6Iy/zr/UdbCeoMzGj59i2O/JbrIOy@public.gmane.org>
2011-02-04 21:06 ` David Miller
2011-02-07 11:38 ` About bittiming calculation result Tomoya MORINAGA
[not found] ` <5009516791F146C49C73FAC57C437313-c0cKtqp5df7I9507bXv2FdBPR1lH4CV8@public.gmane.org>
2011-02-07 12:00 ` Wolfgang Grandegger
[not found] ` <4D4FDEF9.2030305-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2011-02-07 15:52 ` Wolfgang Grandegger
[not found] ` <4D501555.5000905-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2011-02-08 1:27 ` Tomoya MORINAGA
[not found] ` <93C12206407640199DCDD3A89A333F13-c0cKtqp5df7I9507bXv2FdBPR1lH4CV8@public.gmane.org>
2011-02-08 7:57 ` Wolfgang Grandegger [this message]
2011-02-08 1:09 ` Tomoya MORINAGA
[not found] ` <E2BAACFF191C4175854E6B2EB9135BE5-c0cKtqp5df7I9507bXv2FdBPR1lH4CV8@public.gmane.org>
2011-02-08 3:29 ` Bhupesh SHARMA
[not found] ` <D5ECB3C7A6F99444980976A8C6D896384DEE2BE1A7-8vAmw3ZAcdzhJTuQ9jeba9BPR1lH4CV8@public.gmane.org>
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
[not found] ` <6b49b9521416fbd50214485d3e14e5f254ada4f7.1296818921.git.segoon-cxoSlKxDwOJWk0Htik3J/w@public.gmane.org>
2011-02-04 21:06 ` David Miller
2011-02-04 13:11 ` [rtc-linux] [PATCH 00/20] world-writable files in sysfs and debugfs Linus Walleij
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D50F75A.5040700@grandegger.com \
--to=wg-5yr1bzd7o62+xt7jha+gda@public$(echo .)gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public$(echo .)gmane.org \
--cc=netdev-u79uwXL29TY76Z2rM5mHXA@public$(echo .)gmane.org \
--cc=socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public$(echo .)gmane.org \
--cc=tomoya-linux-ECg8zkTtlr0C6LszWs/t0g@public$(echo .)gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox