I have seen this too. It is as Gerald says. Your cape is loading one or more of the boot pins. I did a cape - even though all the connections were high impedance inputs, it was still enough to twitch the boot pins. Anyway, I ended up adjusting a couple of the pullup resistors to adjust for it on the pins I was using - changed from 100k to 33k. Only had to do this for the pullups - so apparently stealing even a little from the 33uA max source was enough to impact the boot read of the pins. Hope that helps.
GL Matt On Monday, May 2, 2016 at 3:43:34 PM UTC-5, Matt99eo wrote: > > Working with a BBB that has a custom hardware cape on it. > > Sometimes I get an unsuccessful boot out of it where when connected to the > serial debug part I see the letter C printed indefinitely. > > I'd say 90% of the boot attempts work (serial debug looks normal) and 10% > I get the infinite C printout and no successful boot. > > > Any ideas? > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/a8acb994-f7cb-4c2f-a421-4265a2ccc9db%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
