#9604 NORM 1.5-sof: build DC sensor mode on audio driver

[Zarro Boogs per Child]

#9604: build DC sensor mode on audio driver
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           Reporter:  Quozl     |       Owner:  dsd              
               Type:  defect    |      Status:  new              
           Priority:  normal    |   Milestone:  1.5-software-beta
          Component:  kernel    |     Version:  not specified    
         Resolution:            |    Keywords:                   
        Next_action:  diagnose  |    Verified:  0                
Deployment_affected:            |   Blockedby:                   
           Blocking:            |  
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Comment(by edmcnierney):

 I've done some testing to compare an XO-1 and an XO-1.5 both running
 Measure-29.

 '''Resistance Sensor

 With the Resistance Sensor setting selected, and a bare-wire sensor
 plugged in (mono), the XO-1 displays no signal while the XO-1.5 shows a
 horizontal line across the middle of the screen.  Shorting the wires
 generates activity on the display on the XO-1, while on the XO-1.5 the
 horizontal signal twitches just a very, very small amount.

 '''Voltage Sensor

 With the Voltage Sensor selected, I applied a variable voltage between 0.0
 and 2.5 volts with the same mono plug.  On the XO-1 I could not get a
 signal display, but saw that the current draw varied between 0.0A and
 1.75A as the voltage increased.  On the XO-1.5 there was no current draw
 at all up until 2.3V.  Between 2.3V and 2.5V a 0.01A draw was seen.

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Ticket URL: <http://dev.laptop.org/ticket/9604#comment:15>
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