From: Tim Nelson <tnelson-f4DZ+GDyDBaakBO8gow8eQ@public.gmane.org>
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Winbond W83L604G
Date: Fri, 8 Jul 2011 16:48:50 -0500 (CDT) [thread overview]
Message-ID: <21511805.221.1310161730242.JavaMail.root@zmail.rockbochs.com> (raw)
In-Reply-To: <20110707182315.6e28f62a-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
----- Original Message -----
> Your binary->hex is correct, and the command as well, but the chip did
> not like the write for some reason. You should look at the kernel logs
> when it failed, there may be a hint. You could also just retry to
> check
> if this was maybe a transient error.
>
> To test the reliability of the SMBus you could dump the whole register
> map:
> # i2cdump -y -r 0x00-0x22 0 0x19
> and look for XX's.
>
I'm seeing a *lot* of 'XX's present. Here are ten samples:
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX XX XX 00 XX 55 XX XX XX XX ff XX XX XXXXXX.XUXXXX.XX
10: 3f XX XX XX 00 XX XX XX XX XX ff XX XX XX XX XX ?XXX.XXXXX.XXXXX
20: 95 92 XX ??X
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX XX XX XX XX 55 XX XX XX XX ff XX XX XXXXXXXXUXXXX.XX
10: XX XX 00 XX XX XX XX XX XX XX XX XX XX XX XX XX XX.XXXXXXXXXXXXX
20: XX 92 XX X?X
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 9f 00 XX XX XX XX XX XX XX XX XX XX XX XX XX XX ?.XXXXXXXXXXXXXX
10: XX XX XX 3f XX XX XX XX XX ff XX XX XX XX XX XX XXX?XXXXX.XXXXXX
20: XX 92 XX X?X
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX XX XX 00 00 XX XX XX XX XX XX XX XX XXXXXX..XXXXXXXX
10: XX XX XX XX XX XX 00 XX XX XX XX XX XX ff ff ff XXXXXX.XXXXXX...
20: XX XX XX XXX
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX 00 ff XX XX XX XX XX XX XX XX XX ff XX XX XX..XXXXXXXXX.XX
10: XX XX 00 XX XX XX XX XX XX XX XX ff ff XX ff XX XX.XXXXXXXX..X.X
20: XX XX XX XXX
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX 00 XX 00 XX XX XX XX XX XX XX XX XX XX XX XX.X.XXXXXXXXXXX
10: XX XX XX XX XX XX XX XX XX ff XX XX XX XX XX XX XXXXXXXXX.XXXXXX
20: XX 92 XX X?X
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX XX XX 00 00 XX XX XX XX XX ff XX XX XXXXXX..XXXXX.XX
10: XX XX 00 XX XX XX XX XX XX XX XX ff XX ff XX XX XX.XXXXXXXX.X.XX
20: 95 XX XX ?XX
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 9f XX XX XX XX XX XX XX 55 XX XX ff XX XX XX XX ?XXXXXXXUXX.XXXX
10: XX 00 XX XX XX XX XX XX XX ff XX XX XX XX XX XX X.XXXXXXX.XXXXXX
20: XX XX 00 XX.
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX 00 XX XX XX XX XX XX XX ff XX XX XX XXXX.XXXXXXX.XXX
10: XX XX 00 XX 00 XX 00 XX XX XX XX XX XX ff XX XX XX.X.X.XXXXXX.XX
20: XX XX XX XXX
root@aaa:~# i2cdump -y -r 0x00-0x22 0 0x19
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX XX XX XX XX XX 9e XX XX ff XX XX XX XXXXXXXXX?XX.XXX
10: XX 00 00 XX XX XX XX XX XX XX ff ff XX XX XX ff X..XXXXXXX..XXX.
20: XX XX XX XXX
What does this mean? Unstable SMBus?
--Tim
next prev parent reply other threads:[~2011-07-08 21:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-05 14:46 Winbond W83L604G Tim Nelson
[not found] ` <30480104.171.1309877177809.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-05 14:59 ` Zhang, Shijie
[not found] ` <6D7A567890E70E4BA49B8A9B365980FA12D99C14BE-QQHDSDV1ERZpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2011-07-05 17:06 ` Tim Nelson
[not found] ` <8829587.204.1309885573653.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-06 7:03 ` Jean Delvare
[not found] ` <20110706090347.44bd4bbe-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-07-06 14:40 ` Tim Nelson
[not found] ` <20432649.84.1309963215499.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-06 15:05 ` Jean Delvare
[not found] ` <20110706170531.2f3bed19-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-07-06 15:10 ` Tim Nelson
[not found] ` <29201825.112.1309965025512.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-06 20:30 ` Tim Nelson
[not found] ` <13595453.330.1309984221608.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-07 6:43 ` Michael Lawnick
2011-07-07 8:19 ` Jean Delvare
[not found] ` <20110707101931.18379a23-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-07-07 15:32 ` Tim Nelson
[not found] ` <19430981.80.1310052758044.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-07 16:23 ` Jean Delvare
[not found] ` <20110707182315.6e28f62a-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-07-08 21:48 ` Tim Nelson [this message]
[not found] ` <21511805.221.1310161730242.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-09 7:23 ` Jean Delvare
[not found] ` <20110709092334.566e6dcd-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-07-11 17:31 ` Tim Nelson
[not found] ` <2607557.175.1310405514456.JavaMail.root-N94c1vXlnCs/q/FG96+aB0EOCMrvLtNR@public.gmane.org>
2011-07-11 18:29 ` Jean Delvare
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