Hey there,
for quite a while I was using my Station P1 aka T-Firefly ROC-RK3399-PC-PLUS (with a nice case welded around) as crude NAS and wanted to do something new. However for unknown reason I cannot boot from microSD.
I am used to that the Armbian boot loader should switch to microSD when detected so other OS can be used. Does not work though.
It always starts booting from SPI which is fine in theory and then jumps to eMMC which boots fine. With SD inside it does the same. If I remove the eMMC module u-boot stucks to PXE which obviously fails and then drops to U-Boot shell.
I played with that shell for a while including recovery steps (https://docs.armbian.com/User-Guide_Recovery/) (but with correct baud rate) but wasn't successful. On bootz it complains about kernel magic or ARM64 kernel magic, depending on usage of bootz or booti.
Tried erasing SPI but was not successful doing that. rkdeveloptool in maskrom mode stated it erased something but did not change anything. From within Bullseye the SPI flash seems not to be visible. I assume it should be /dev/mtd0 or something?
Kind a running out of ideas...
Images on microSD I tried were 23.02 edge, 22.12 current and 22.02 current.