Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Gerhard Hoffmann
In principle yes, but given that you won't need that many bits and that the BBB pins are relatively weak drivers and the ground connections on the BBB are a joke, I prefer 74LVC244 / 74LVC245 or similar. They present less load to the BBB and are also much more common, mainstream devices,

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Mike Brandon
Actually, one more question before I go cry myself to sleep... Considering I will want to make similar connections on P8 in the future... can I use a device like this to isolate the boot pins at boot? http://www.ti.com/lit/ds/symlink/sn74cbtd16211.pdf On Friday, November 30, 2018 at 8:29:32 PM

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Mike Brandon
HAH, wow it has been a long day. It must be time for me to put this aside for a bit... WOW. Sometimes I amaze myself. Thanks and sorry that my goof has taken up a small bit of ya'lls valuable time. Until my next stupid question... On Friday, November 30, 2018 at 8:24:45 PM UTC-5,

RE: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Gerald Coley
: [beagleboard] Beaglebone Black won't boot when gpio connections made U-Boot SPL 2017.03-2-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

RE: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Gerald Coley
: [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 b

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Mike Brandon
U-Boot SPL 2017.03-2-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

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Robert Nelson
On Fri, Nov 30, 2018 at 4:38 PM Mike Brandon 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, --

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Mike Brandon
legroups.com] > On Behalf Of Mike Brandon > > Sent: Friday, November 30, 2018 3:07 PM > > To: BeagleBoard > > Subject: Re: [beagleboard] Beaglebone Black won't boot when gpio connections > made > >   > > > > Gerald, > > > >   >

RE: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Gerald Coley
@googlegroups.com] On Behalf Of Mike Brandon Sent: Friday, November 30, 2018 3:07 PM To: BeagleBoard 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

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Gerhard Hoffmann
#Expansion_Header_Pin_Usage Gerald *From:*beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] *On Behalf Of *Mike Brandon *Sent:* Friday, November 30, 2018 2:52 PM *To:* BeagleBoard *Subject:* [beagleboard] Beaglebone Black won't boot when gpio connections made I have a device

Re: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Mike Brandon
ald > > > > > > *From:* beagl...@googlegroups.com [mailto: > beagl...@googlegroups.com ] *On Behalf Of *Mike Brandon > *Sent:* Friday, November 30, 2018 2:52 PM > *To:* BeagleBoard > > *Subject:* [beagleboard] Beaglebone Black won't boot when gpio > connections made >

RE: [beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Gerald Coley
To: BeagleBoard 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

[beagleboard] Beaglebone Black won't boot when gpio connections made

2018-11-30 Thread Mike Brandon
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