Simplified Hardware Flashing

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If your device needs to be flashed with an external SPI programmer, 25xx NOR flash instructions gives information on how to set it up.

If needed, partially or fully disassembly your device before proceeding further accoding to it’s guide page

Some flash chips might need it’s motherboard to be powered (but turned off) from an external power source, in that case, disconnect the vcc/power cable between the clip and the programmer, or it might be damaged and fried.

A rpi-pico is used as an expample here, but modify the lines to fit your programmer if needed.

In case you may need to specify the chip with -C “XXX/XXX” from the listed options, make sure you select the option containing your model, read from the flash chip itself on the motherboard.

Do it twice (to check and compare if reading it gone wrong and backups differs.)

flashprog -p serprog:dev=/dev/ttyACM0,spispeed=16M -r Backup1.bin

flashprog -p serprog:dev=/dev/ttyACM0,spispeed=16M -r Backup2.bin

Compare those if reading from the flash were successful:

diff Backup1.bin Backup2.bin

For more than 2:

shasum Backup1.bin Backup2.bin Backup3.bin

If those differs, something gone wrong and proceeding further may (DON’T) leave your device unrecoverable (without a reliable backup) if flashing fails as well.

If something gone wrong, feel free to ask for help on IRC.

Instructions continues on the device’s page.

SPDX-License-Identifier: GFDL-1.3-or-later

Markdown file for this page: https://libreboot.org/docs/install/simplified-hw-flashing.md

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