Then there must me somethig else at play here. Without a schematic, kind of hard to tell.
-----Original Message----- From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On Behalf Of Mike Brandon Sent: Friday, November 30, 2018 4:38 PM To: BeagleBoard <beagleboard@googlegroups.com> Subject: Re: [beagleboard] Beaglebone Black won't boot when gpio connections made 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. On Friday, November 30, 2018 at 5:03:42 PM UTC-5, gcoley1 wrote: > It just take on boot pin to mess up the boot process. If it is not powered on > it still presents a load. It still affects the boot pins. > > > > Key point…DO NOT PUT ANYTHNING on GPIO pins that share the boot function on > power up. > > > > Gerald > > > > > > From: beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] > On Behalf Of Mike Brandon > > Sent: Friday, November 30, 2018 3:07 PM > > To: BeagleBoard <beagl...@googlegroups.com> > > Subject: Re: [beagleboard] Beaglebone Black won't boot when gpio > connections made > > > > > > Gerald, > > > > > > > > > Thanks for pointing me to that information but I don't see where I am > utilizing one of the 16 boot pins on the expansion header. > > > > > > > > > > Also, my external device that is connected to the GPIO listed above is not > powered up at boot. > > > > > > > > > > Am I missing another key point in the reference you pointed me to? > > > > > > > > > > Mike > > > > On Friday, November 30, 2018 at 3:54:42 PM UTC-5, gcoley1 wrote: > > > > > > > Yep, you are changing the boot mode of the processor. A big no no. > > > > https://www.elinux.org/Beagleboard:BeagleBoneBlack#Expansion_Header_Pi > n_Usage > > > > Gerald > > > > > > From: > beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] > On Behalf Of Mike Brandon > > Sent: Friday, November 30, 2018 2:52 PM > > To: BeagleBoard <beagl...@googlegroups.com> > > Subject: [beagleboard] Beaglebone Black won't boot when gpio > connections made > > > > > > I have a device plugged in via GPIO to the following gpio pins: > > > > > > > > > 48 > > > > > 49 > > > > > 115 > > > > > 117 > > > > > > > > > > If my device is connected at boot, the BB will not boot. > > > > > > > > > > I am booting from eMMC. Any idea why this is occurring? I am using the > attached custom overlay which is essentially the univ-emmc overlay with some > modifications on GPIOs not listed above. > > > > > > > > > > Mike > > > > > > > > > > > > > > -- > > > 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...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/bbf65703-a19c-446f-a962-6baa15deff82%40googlegroups.com. > > 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...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/338ac43f-50e8-4130-83d6-a4e85050a802%40googlegroups.com. > > 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/39c8264a-074b-4372-9af2-a173431d2787%40googlegroups.com. 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/25dd303a0c9d421782a6b36044753b5b%40winhexbeus11.winus.mail. For more options, visit https://groups.google.com/d/optout.
