Using Device Tree Overlays, example on BeagleBone Cape add-on boards

The concept of Device Tree overlays The Device Tree language is a way to describe hardware that is present in a system and cannot be automatically detected. That’s the case of devices directly implemented on a System on a Chip, such as serial ports, Ethernet or Nand flash controllers. That’s also the case of devices connected to a number of buses, such as I2C and SPI, that do not provide mechanisms for dynamic enumeration and identification of devices. For a given CPU architecture (ARM, PowerPC, etc), such a description allows to have a unique kernel supporting many different systems with … Continue reading Using Device Tree Overlays, example on BeagleBone Cape add-on boards

Improving usage of device trees

Using device trees is one of the most complicated and important, and sometimes risky, elements of using a Beagle to make use of add-on hardware. With the addition of the AM5729-based BeagleBone AI to the family of boards sporting BeagleBone headers, the complications have increased, requiring additional considerations with dependencies on different processor pins connected to different header pins and a different peripheral mix. Further, AM5729 won’t be the last processor where Beagle uses on a board with BeagleBone headers! Further, in community efforts to add dynamic support for device tree overlays into the upstream Linux, much has changed for … Continue reading Improving usage of device trees

Two New PocketBeagle Capes Debut at Embedded World

The leading international trade show and conference for embedded systems with over 32,000 visitors was the perfect place for the PocketBeagleĀ® TechLab Cape and the PocketBeagleĀ® GamePup Cape to make their debut. With plenty of IO and interesting features, these two additions to PocketBeagleĀ® are a great way to have fun while learning embedded programming or to start a larger project. Continue reading “Two New PocketBeagle Capes Debut at Embedded World”