NEC MPI4E Raspberry Pi Compute Module Setup Guide

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vcgencmd display_power 1

7.20 To create an image of the Compute Module to backup or clone

Follow the steps to connect to a Windows host PC and place the Compute Module into BOOT MODE.

Run the Win32DiskImager software and instead of selecting Write, select Read to read the drive and

store as an .img file.

Note: Because the entire expanded system will be copied, the resulting .img file will be the size of the

flash capacity of the Compute Module

If imaging Raspberry Pi OS from a Linux machine, the image file can be reduced in size using a tool such

as PiShrink. This will reduce the time it takes to upload the image to other Compute Modules, the image

will be expanded to the full size when the Compute Module is first booted. Extreme care should be taken

to ensure that the re-expanded image is correct before distributing.

PiShrink is available on GitHub:

https://github.com/Drewsif/PiShrink

7.21 Debug GPIO lines and overlay assignments

A set of diagnostic tools for listing, monitoring, and changing the GPIO lines on the Compute Module is

available by installing the gpiod package:

sudo apt install gpiod

Six tools are available for performing various operations:

• gpiodetect

• gpioinfo

• gpioget

• gpioset

• gpiofind

• gpiomon

7.22 Assign different MAC address to the network interfaces

This section is pending.

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NEC MPI4E RaspberryPi 4 System on a Chip Solution