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A bit of an ancient
web2.0 design,
Couple lines of code,
thoughts, photo and a charm. Read moreBlog
Notes, examples and
surprises. Go to blogElectronics
micro, radio,
and usual. Go to categoryPhoto
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When you read some pdf datasheet
22/December/2020 mediateklow-powerpdfdatasheet
Looking for whatever with low power consumption.
Found modules on mediatek, download documentation for SoM (System on Module).
You scroll through in search of how much the chip consumes.
MT7628_no_power_data_exw.png
MT7688_no_mAh_data_exw.png
Selecting a bootable kernel in the U-Boot console via a debugging connection
29/August/2018 debianubootcubieboardkerneluart
What did the embedded system look like?
u-boot-kernel-select.png
There is one small CubieBoard 2 next to the small router.
And there is no physical access to them.
A USB-UART is connected to a router controlled by LEDE, the pins of which are connected to CubieBoard2.
Both the router and CubieBoard2 are accessible via ssh.
It was the presence of UART in the assembly that allowed us to raise the fallen CubieBoard2 remotely.
How did it fail?
One day a regular update of the Debian kernel arrives
linux-image-4.9.0-8-armmp-lpae.
After the update the system stops responding.
How is this usually done?
Everything is simple here, you take out the microsd card, and then there is no need to describe it further.