Thanks Greg. You mentioned running from SDRAM before. I read the dramboot section, now I understand this a little better.
My .config for the SAMA5D27-XULT has these two settings: CONFIG_SAMA5_BOOT_SDRAM=y CONFIG_BOOT_RUNFROM_SDRAM=y So I think I am doing this already on the SAMA5D27-XULT, but it's using U-Boot directly, not using the dramboot. I'll see if I can adapt the dramboot config for the SAMA5D27. I'll probably have to set up SWD debugging... for that I need an adapter for my JLink, and I'll need to solder some wires onto the GiantBoard SWD pads. cheers adam On Tue, Mar 10, 2020 at 9:23 AM Gregory Nutt <spudan...@gmail.com> wrote: > > > ... I can fatload nuttx.bin. But when I run (go 0x20008040) nuttx > > doesn't boot. Doing the same sequence on the SAMA5D2-XULT results in > nuttx > > booting... > > When I worked with the SAMA5D4-EK, I used a tiny bootloader that I wrote > called dramboot. It make debug a lot easier. See > boards/arm/sama5d4-ek/README.txt > > You might be able to use J-link with U-boot too. Put a breakpoint at > 0x20008040 and see what happens. > > NOTE: I see that the Giant board in now in stock at Mouser US for $62.50 > > -- Adam Feuer <a...@starcat.io>
