DMA to GPIO is possible. The GPIO register would be classified as a 'memory' location rather than a 'peripheral' resource. Then the contents can be connected to either another memory or peripheral location. There is a 'bit-banding' feature set available as well which may fit better in certain applications.
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.