Interesting boot-loader article! I have to give a glance to the U-boot universal boot loader you mention. It seems very good for big operating systems. And I suppose instead of using a computer with something like Hyper-Terminal software a microcontroller can due the part of the host computer through the UART or RS-232 serial port. Boot-loaders get even more complex when they have to handle the software upgrade process. They might boot-up the system in a different mode like the industry standard DFU (Device Firmware Upgrade) mode and after that, switch the device to the normal user mode. This can be done with only one value in a memory register and the system goes and reads such address and boot accordingly.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.