U-Boot

If you’ve taken a good look at the VCK190 or VMK180 Versal Evaluation boards, you would have noticed that it has a Zynq UltraScale+ device on it. This would be the central device on a lower cost development board, but on these boards it is just a lowly system controller. The system controller is there to manage power supplies, clocks and other on-board resources and it runs independently of the main device. [Read More]

In this post we will look at two methods for modifying the U-Boot environment variables. The first method is changing the values stored in flash from the UBoot command prompt. The second method is changing the hard-coded default values in the PetaLinux project. We’ll be assuming a boot from QSPI flash, although the concepts also apply to booting from SD card or other non-voltatile storage devices. The U-Boot environment variables determine exactly how a board is supposed to boot. [Read More]