Am 04.12.2019 um 23:13 schrieb aTc atc@k-n-p.org:
I ran into a fun problem where my pyra doesn't seem to boot when there's an sd card in slot 1 that doesn't have a bootloader.
(dd'ed 50mb of zeros onto the card first, then created a fat32 partition)
I installed uboot on the emmc, and that boots when the card is removed (after having pressed power for 8 seconds to shut it down completely, then power again to start it. it seems to get stuck. It does pull 0.5A from the usb socket).
Is this an issue on the other prototypes as well,
yes. It is known for > 2 years [1] and likely an effect of the BootROM. AFAIR also on OMAP5EVM.
or is this part of the "wrong resistor that puts the cpu in debug mode" problem that this older prototype apparently has ?
It may be nothing we can "fix" by hardware, u-boot or kernel. Just by a warning in the user manual.