0 Replies Latest reply: Feb 14, 2012 8:09 AM by drodo RSS

    Optimal Power Measurements from the MCPC

    drodo

      Hello,

       

      I would like a confirmation of the following power measurement scheme I have concluded to, after reading relevant material. I wish to only read power conspumption of the entire chip (voltage and current of the 3V3SCC source) from the MCPC with a high refresh rate (not like the sccBmc -c status refresh time). So I plan to do the following:

       

      1. Turn off the i2c interface (telnetting to the BMC etc.)

      2. Use a core of the SCC to enable bit 11 of the 0x0842 address and also bits 7 (for 3V3SCC voltage) and 9 (for 3V3SCC current).

      3. From the MCPC, use sccDump -s 0x08424 to get the 3V3SCC current and sccDump -s 0x0841C to get the voltage.

      4. Keep doing 3 until the measurement campaign is finished.

      5. Use a core of the SCC to disable enable bit 11 of the 0x0842 address and also bits 7 (for 3V3SCC voltage) and 9 (for 3V3SCC current).

      6. Turn on the i2c interface (telnetting to the BMC etc.)

       

      How do you think of the above steps? Is any step redundant?

       

      I especially was unclear weather there is an overlap between steps 1&2 (and 5&6 as well). Namely, is the i2c on/off command related to putting the Power Measurement Controller into normal/measurement mode? (I think not, but wasn't sure)

       

      Thanks for your time,

       

      Dimitris R.