Looks like you may be conflicted with the eMMC pins, which also go to the expansion headers.
[cid:image001.png@01D488DB.E1A48D20] I do not know if the MMC ports are numbered 0 and 1 or 1 and 2 these days in SW. But normally the board boots from the eMMC. On the Hardware we numbered them 0 and 1, 0 being the SD card and 1 being the eMMC. You can insert a bootable SD card and see if it boots from there. Gerald From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On Behalf Of Mike Brandon Sent: Friday, November 30, 2018 5:09 PM To: BeagleBoard <beagleboard@googlegroups.com> Subject: Re: [beagleboard] Beaglebone Black won't boot when gpio connections made U-Boot SPL 2017.03-00002-gd12b1519b4 (Mar 14 2017 - 10:28:26) Trying to boot from MMC2 mmc_load_image_raw_sector: mmc block read error spl_register_fat_device: fat register err - -1 spl_load_image_fat: error reading image u-boot.img, err - -1 ** ext4fs_devread read error - block Failed to mount ext2 filesystem... spl_load_image_ext: ext4fs mount err - 0 On Friday, November 30, 2018 at 5:55:16 PM UTC-5, RobertCNelson wrote: On Fri, Nov 30, 2018 at 4:38 PM Mike Brandon <smbra...@gmail.com<javascript:>> wrote: > > But which gpio am I using that is a boot pin? In the reference manual, the 16 > boot pins are on the P8 header... I'm using gpios on the P9 header. > Does anything show up over serial when it's plugged in? And what shows up? Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com<mailto:beagleboard+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/462d9e5e-449c-4787-95a6-71ce04390003%40googlegroups.com<https://groups.google.com/d/msgid/beagleboard/462d9e5e-449c-4787-95a6-71ce04390003%40googlegroups.com?utm_medium=email&utm_source=footer>. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/94c38d0e1d504739a0bc991f5762a2ad%40winhexbeus11.winus.mail. For more options, visit https://groups.google.com/d/optout.
