Power measurement using PMbus on ZCU-102

sanjaya · September 8, 2020, 4:51am

I have built a pynq image for ZCU-102 and am able to successfully run it. I want to measure the PS power consumed and PL power consumed seperately while runnning a program (It has an overlay designed for it) . The following is a screenshot of “pmbus.get_rails()” . I am not sure which rail should I moniter for my purpose . Where will I find this information ? Is this all the power rail that are present on ZCU-102 ? Also I would like to know if the power consumption measured this way will include the power consumed while loading the bitstream on fpga (reconfiguring the FPGA).

rock · September 10, 2020, 3:23pm

You probably need to check the ZCU102 schematic?

sanjaya · September 11, 2020, 3:16am

Hi ,
I tried going through the schematic of the board. But where exactly should I look for ? I searched for the rail names as indicated by pynq by could not find any rails with these names.

sanjaya · September 11, 2020, 3:34am

Also, I am not able to find all voltage rails through pynq, I guess. The user guide shows many rails being present, but they are not listed here …

rock · September 14, 2020, 7:18pm

The rail names do not look correct to me; an example here:

github.com

Xilinx/PYNQ/blob/master/boards/ZCU104/notebooks/common/zcu104_pmbus.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# PMBus on the ZCU104\n",
    "\n",
    "The ZCU104 has some support for monitoring power rails on the board using PMBus. PYNQ exposes these rails through the get_rails function that returns a dictionary of all of the rails available to be monitored."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",

This file has been truncated. show original

When you built the image, did you include a package like this:

sanjaya · September 17, 2020, 7:21am

Hi Rock,
Thanks for the link.I do not remember including any such package while building the image. But how do I do it ?

rock · September 17, 2020, 8:50pm

You need to create a package like that in ZCU104 packages folder, and add that into your ZCU104.spec file. Your new configuration file will be related to ZCU102 schematic so you need to check that.

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Power measurement using PMbus on ZCU-102

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