0 Replies Latest reply on Aug 23, 2011 1:50 PM by STEVENBURNS

    Development Board 1-N450: Accessing the current sense analog input to the Embedded Controller

    Community Member

      I'd like to make platform power measurement while applications are running on my 1-N450 board. Looking at the schematics, I see that there is a current sense resistor in series with the 12V supply and an analog amplifier on the board that produces a voltage proportional to the supply current. This voltage is feed into the Embedded Controller as analog input "P70/AN0". The signal is labeled "IMON_12VDC" on pages 17 and 23 of the board schematics.

       

      Is there a way to access this analog voltage through existing /sys virtual files exposed by the Linux kernel (2.6)? If not, what do you have to do get access to this value?

       

      Steve Burns