[lm-sensors] vt8231 - epia800

Gabe gabriel.euzet at gmail.com
Sat Feb 18 18:27:27 CET 2006


Hi Roger,

2006/2/18, Roger Lucas <roger at planbit.co.uk>:
>
>  Hi Gabe,
>
>
>
> I haven't tried the VT8231 driver with an Epia 800 as I don't have one.
>  For my Epia 5000 board, my current sensors.conf is below.
>
I have tried your sensors.conf. I needed to change VCore, mine, in bios, is
1.65V. But temp1 is not displayed when running sensors. However there are 3
files for temp1 in "/sys/devices/platform/i2c-9191/9191-6000". I dn't
understand !

> The temperature scaling was found by measuring the device heatsink with a
> thermal probe whilst monitoring the VT8231 output.  The curve is very
> different to anything from VIA or anyone else, but it is accurate for my
> Epia 5000 boards (I have 4 of them).
>
FYI, I have modified my 800 in fanless motherboard (Zalman NB47J). It's why
I want to monitor temperature.

> The voltage scaling is totally dependent on the external resistors to the
> VT8231.  If your board has the same external resistor combinations as mine
> then the voltages are the same.  If you have different resistors then you
> will have to work out which is which.  Let me know if you feel the need to
> go down the same path and I'll give you some pointers….
>
If I don't need a big electronic equipment I'd like ;-)

thanks you for your help :-)
Gabe

FWIW, I am running the 2.6.14 kernel…
>
>
>
> Regards,
>
>
>
> Roger
>
> ========================================
>
>
>
>
>
> chip "vt1211-*" "vt8231-*"
>
> #
> ===========================================================================
>
> #           *** This file is specific to the Via EPIA 5000 ***
>
> #
> ---------------------------------------------------------------------------
>
> #
>
> # Although other motherboards may well use the VT8251, there is NO
> GUARANTEE
>
> # that they will have it wired up in the same configuration.  External
>
> # components may differ and the device inputs may be used to sense
> different
>
> # things.
>
> #
>
> #       CHECK THAT YOUR CONFIGURATION IS CORRECT FOR YOUR MOTHERBOARD.
>
> #
> ===========================================================================
>
> #
>
>
>
>     label in0 "+12v"
>
>     label in1 "+5v"
>
>     label in2 "+2.5v"
>
>     label in3 "Vcore1 (1.2v)"
>
>     label in4 "NorthBridge Core"
>
>     label in5 "+3.3V"
>
>
>
>     label temp1 "CPU Temp"
>
> #
>
> #   Voltage scaling, as far as possible, is in the driver.  For IN0-4 the
>
> #   voltage at the VT8231 PIN is returned in mV.  If the input is used to
>
> #   measure a voltage that may exceed 2.5v then external scaling must be
>
> #   provided on your motherboard.  Depending on the voltage, the
> appropriate
>
> #   scaling values are below (if the motherboard manufacturer followed
> VIA's
>
> #   guidelines...)
>
> #
>
> #       Voltage                 Scale
>
> #       VCore                   1.0
>
> #       2.5                     0.8333
>
> #       3.3                     0.6296
>
> #       3.5 (3.3V ext.)         0.5952
>
> #       5.0                     0.4167
>
> #       12.0                    0.1754
>
>
>
>     compute in0 @/0.1754,@*0.1754
>
>     compute in1 @/0.4167,@*0.4167
>
>     compute in2 @/0.8333,@*0.8333
>
>     compute in4 @/0.6296,@*0.6296
>
>
>
>     set in0_min 12.0 * 0.95
>
>     set in0_max 12.0 * 1.05
>
>     set in1_min 5.0 * 0.95
>
>     set in1_max 5.0 * 1.05
>
>     set in2_min 2.5 * 0.97
>
>     set in2_max 2.5 * 1.03
>
>     set in3_min 1.2 * 0.95
>
>     set in3_max 1.2 * 1.05
>
>     set in4_min 3.3 * 0.95
>
>     set in4_max 3.3 * 1.05
>
>     set in5_min 3.3 * 0.95
>
>     set in5_max 3.3 * 1.05
>
>
>
>     set fan1_div 8
>
>     set fan1_min 1000
>
>     set fan2_div 8
>
>     set fan2_min 1000
>
>
>
> #   This temperature calibration is found by measuring a sample device.
>
> #   You may wish to verify these values on your own platform.
>
>
>
> #    compute temp0 @*317.2-57.55,(@+57.55)/317.2
>
>     compute temp1 @*1.268-57.54,(@+57.54)/1.268
>
>     set temp1_min 15
>
>     set temp1_max 50
>
>
>
> # End of file
>
>
>
>
>
>
>   ------------------------------
>
> *From:* lm-sensors-bounces at lm-sensors.org [mailto:lm-sensors-bounces at lm-sensors.org]
> *On Behalf Of *Gabe
> *Sent:* 18 February 2006 15:38
> *To:* LM Sensors
> *Subject:* Re: [lm-sensors] vt8231 - epia800
>
>
>
> Hello,
>
> 2006/2/18, Jean Delvare <khali at linux-fr.org >:
>
> Hi,
>
> > Does anyone can tell me how to get the temperature of my system ?
> >
> > MB : Epia 800 (sensor vt8231)
> > (...)
> > output of sensors :
> > vt8231-isa-6000
> > Adapter: ISA adapter
> > in0:       +2.13 V  (min =  -0.03 V, max =  +2.63 V)
> > +2.5V:     +2.55 V  (min =  -0.04 V, max =  +3.16 V)
> > VCore:     +2.07 V  (min =  +1.56 V, max =  +1.72 V)   ALARM
>
> What's the nominal voltage for your CPU?
>
>
> 1.65 V
>
>
>
> > +5V:       +4.03 V  (min =  -0.07 V, max =  +5.23 V)
> > +12V:     +12.55 V  (min = +11.36 V, max = +12.55 V)
> > +3.3V:     +3.30 V  (min =  +3.13 V, max =  +3.46 V)
> > fan1:        0 RPM  (min = 2570 RPM, div = 2)          ALARM
> > fan2:        0 RPM  (min = 2570 RPM, div = 2)          ALARM
>
> If you don't have fans connected or they are not able to report their
> speed, set the limit to 0 to get rid of the alarm. If you have slow
> fans, increase the fan clock divider values to 4 or 8 to get the speed
> reading, and set the limits to lower values too.
>
>
> I have no fan and set the min to 0 as you say, alarm has disappeared,
> thanks.
>
>
>
> > ERROR: Can't get TEMP2 data!
> > ERROR: Can't get TEMP3 data!
> > ERROR: Can't get TEMP4 data!
> > ERROR: Can't get TEMP5 data!
> > ERROR: Can't get TEMP6 data!
> > ERROR: Can't get TEMP7 data!
>
> Kernel version (uname -r)?
>
>
> 2.6.16-rc3
> with the last vt8231 patch (given in this mailing list)
>
>
>
> Sensors version (sensors -v)?
>
>
> sensors version 2.9.2 with libsensors version 2.9.2
>
>
>
> --
> Jean Delvare
>
>
>
> with the last vt8231 version I get an alarm to in0 :
> in0:       +2.13 V  (min =  -0.03 V, max =  +2.63 V)   ALARM
>
> regards,
> Gabe
>
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