[lm-sensors] Strange Values with pcf8591 chip driver

[lm-sensors] Strange Values with pcf8591 chip driver

[Mirko Buholzer]

I am using a pcf8591 chip on a linux 2.6.8 Kernel. The Adapter Driver is 
the scx200_i2c. When I do a sensors command I get random values on each 
input channel. Channel 1/2/3 are all set to 0V.

voyage:~# sensors
pcf8591-i2c-1-49
Adapter: NatSemi SCx200 I2C
Chan. 0:    1.28 V
Chan. 1:    1.28 V
Chan. 2:    1.28 V
Chan. 3:    1.28 V
Output:     0.00 V (enabled)

Does anyone have any hints or tricks on how I can proceed with debugging 
and error correction? Or is this a known problem?

Thanks and best Regards,
Mirko

-- 

Mirko Buholzer
mirko@buholzer.com

[lm-sensors] Strange Values with pcf8591 chip driver

[Aurelien Jarno]

Hi!

Mirko Buholzer a ?crit :
> I am using a pcf8591 chip on a linux 2.6.8 Kernel. The Adapter Driver is 
> the scx200_i2c. When I do a sensors command I get random values on each 
> input channel. Channel 1/2/3 are all set to 0V.
> 
> voyage:~# sensors
> pcf8591-i2c-1-49
> Adapter: NatSemi SCx200 I2C
> Chan. 0:    1.28 V
> Chan. 1:    1.28 V
> Chan. 2:    1.28 V
> Chan. 3:    1.28 V
> Output:     0.00 V (enabled)
> 
> Does anyone have any hints or tricks on how I can proceed with debugging 
> and error correction? Or is this a known problem?

Have you set the voltage reference of the chip correctly?

Note that you can also change the mode of the chip (single ended or 
differential inputs) with the input_mode parameter.

Aurelien

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  : :' :  Debian GNU/Linux developer | Electrical Engineer
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