Code signing is fairly ubiquitous and is a cryptographic technique for verifying the authenticity of a binary. It is often used as part of the secure boot process of an embedded device where software components of the bootchain are verified by the previous component. For example, the on-chip ROM in a SoC will verify the …
Tag: i.MX8
2 Second Linux Boot on i.MX8
Earlier this year we we wrote a blog post that looked at the steps required to enable hardware accelerated image classification on an i.MX8 based Coral Dev Board. We created a Linux ‘Tux mascot detector’ that was able to detect if an object placed in front of a camera was the Tux mascot or something …
Edge AI: Image Classification on a Coral Dev Board
There are many benefits in moving artificial intelligence from the cloud to the local device – these include improvements to privacy, security, speed and reliability. However, device local AI (Edge AI and Endpoint AI) has only become possible thanks to improvements in both the computing abilities of embedded devices and improvements in the field of …
Flattened uImage Tree (FIT) Images
You’re probably familiar with the steps required to boot Linux from U-Boot: you first load several binaries into memory, perhaps a device tree, a kernel, maybe even an initrd. You then invoke a command such as bootm or booti with arguments providing memory addresses for the binaries you’ve just loaded. However there is a much …
Power-failure-tolerant bootloader flashing on eMMC
It’s a widely held misconception that flashing a bootloader on a device in the field is risky. The reason is that if power is removed from the device during update, then the bootloader may only be partially flashed and thus won’t boot. This view is correct for devices that boot from a single location without …