Posted on 08/03/2017 by Robert Foss
Before being able to write firmware data to any production Chromebook device, the Write-Protect screw has to be removed.
This post will look specifically at removing the WP screw from a Chell (HP Chromebook 13 G1) device, and verifying that it has been successfully removed.
To actually flash firmware to Chromebook machines, a device called a Servo is needed. While these devices aren't available publicly, they can be produced freely or possibly requested from Google if you are contributing code to the ChromiumOS project.
So this is what the WP screw looks like on a Chell Chromebook. This may or may not be what you will find in other devices. But if you take a close look, you will notice that the copper pad that the the screw attaches against is split into parts that are bridged by a screw being inserted.
# Go to your ChromiumOS checkout cd /opt/chromiumos # Enter dev environment cros_sdk # Set device variable export BOARD=chell # Connect to Chromebook using a Servo device sudo servod -b $BOARD & # Disable WP # This step may vary depending on the hardware of your actual Chromebook dut-control fw_wp:off sudo /usr/sbin/flashrom -p ft2232_spi:type=servo-v2 --wp-disable sudo /usr/sbin/flashrom -p ec --wp-disable
This post has been a part of work undertaken by my employer Collabora.
Last week, a new version of docker.io, the Docker package provided by Debian, was uploaded to Debian Unstable. Quickly afterwards, the package…
In Debian and derivative systems, there are many ways to build images. The simplest tool of choice is often debootstrap. It works by downloading…
Launched by Haivision in 2017, and freely available on GitHub via the Mozilla Public License 2.0, SRT is an innovative UDP-based protocol…
Embedded devices are a popular deployment target for GStreamer yet they are not tested on the project's Continuous Integration (CI) system.…
In late January 1998, Netscape surprised everyone by releasing the source for Communicator, its web browser, making it readily available…
At the start of 2018 in January, I joined Collabora, an open source software consultancy, as a Software Engineer Intern with the Multimedia…