07-01-2017, 05:36 PM
07-01-2017, 06:44 PM
(07-01-2017, 05:36 PM)Igonjo Wrote: [ -> ]Is there another way to boot the board?
Yes, I tested u-boot on SPI flash. See rockchip wiki.
RK3288 (see TRM pages 13-16) can boot (from embedded ROM) from SPI2/CS0 flash (routed to connector on pins #19, #21, #23 and #24) or USB ODG.
USB ODG boot probably with special/debug protocol (not from disk) and only if R8210 and R8211 is mounted then USB ODG is routed to "power connector" and then TinkerBoard must be specially powered by 5V connector pins due to BQ24392RSER detector with NX5P3090UK current limiter (be aware different +5V sources!) (see TinkerBoard schematics). Search for rockchip special tools for USB ODG.
You need to build SPI u-boot image (and put to SPI flash) and mount rootfs on USB disk or with NFS or download to ramfs or boot with PXE. You can try my step-by-step SPI dataflash prepare procedure or search internet for board support/examples or you can study build tools and u-boot.
Happy hacking !