Gerald, I do not have this setup yet, but perhaps in the future may have the means. Is this something that might be easily checkable via JTAG ? I've never used JTAG before, and do not have the header in place, but do have a JTAG emulator.
One thing that has been stopping me from seriously considering this as a debugging option, is that I do not know if there is an open source ( gcc - as in GNU compiler collection - Not the compiler its self ) tool. Passed that, it's all new to me, and probably a steep learning curve initially. On Wed, Dec 2, 2015 at 4:21 PM, William Hermans <yyrk...@gmail.com> wrote: > Also, at POR, it would help to understand at which point the USR LEDs( all > 4 at once ) come on, then go off again. > > I'm assuming this is not done in uboot, but I really do not know. > > On Wed, Dec 2, 2015 at 4:19 PM, William Hermans <yyrk...@gmail.com> wrote: > >> If the software is locked up, the USR LEDs would not cycle as if the >> system is attempting to restart. >> >> On Wed, Dec 2, 2015 at 4:08 PM, John Syne <john3...@gmail.com> wrote: >> >>> From what Gerald said previously in this thread: >>> >>> "The reset is an input pin read by the processor, not actually a HW >>> power reset. If the SW is locked up, this could happen.” >>> >>> Regards, >>> John >>> >>> >>> >>> >>> On Dec 2, 2015, at 2:55 PM, William Hermans <yyrk...@gmail.com> wrote: >>> >>> If the board was in sleep, then why wont the reset button reset ? Passed >>> that, why would the USR cycle( flash on then off ) then nothing ? >>> >>> On Wed, Dec 2, 2015 at 3:47 PM, John Syne <john3...@gmail.com> wrote: >>> >>>> Sounds to me that like BBB has gone into sleep mode and there is no >>>> trigger to wake it up. Is there a way to measure the current consumption? >>>> >>>> Regards, >>>> John >>>> >>>> >>>> >>>> >>>> On Dec 2, 2015, at 2:40 PM, William Hermans <yyrk...@gmail.com> wrote: >>>> >>>> One more thing of note. I do not run systemd - Ever. I run SYSV as an >>>> init daemon. I only mention this as I think Robert said something about >>>> systemd lessening this issue. >>>> >>>> On Wed, Dec 2, 2015 at 3:36 PM, Gerald Coley <ger...@beagleboard.org> >>>> wrote: >>>> >>>>> Hmm, not sure what is going on. Sounds like the processor has stopped >>>>> running the code and halted but it forgot to turn off the lights. >>>>> >>>>> Gerald >>>>> >>>>> On Wed, Dec 2, 2015 at 4:26 PM, William Hermans <yyrk...@gmail.com> >>>>> wrote: >>>>> >>>>>> Gerald, it's like the board hangs at power down, but I can not be >>>>>> 100% sure. The reason why I "assume" it's at power down, is that the >>>>>> heartbeat blink stops, but the rest of the LEDs stay on, and the ethernet >>>>>> port light still blinks. >>>>>> >>>>>> The board I experienced this on last night is an Element14 RevC, but >>>>>> I do also have a circuitco A5A that exhibits the same thing. >>>>>> >>>>>> On Wed, Dec 2, 2015 at 3:22 PM, Gerald Coley <ger...@beagleboard.org> >>>>>> wrote: >>>>>> >>>>>>> Is this on power up or is this state happening some time later? If >>>>>>> it is on power up, then the power supply most likely is the issue based >>>>>>> on >>>>>>> the ramp requirements of the PMIC. >>>>>>> >>>>>>> If the power LED is on, then the PMIC is on and ramped up. That is >>>>>>> why I asked for the voltages. >>>>>>> >>>>>>> It also could be a boot pin read issue where it misreads the boot >>>>>>> pins. If that is the case you should see that from the serial port. >>>>>>> >>>>>>> Gerald >>>>>>> >>>>>>> >>>>>>> On Wed, Dec 2, 2015 at 4:15 PM, William Hermans <yyrk...@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>>> For what it's worth Gerald, this happens with nothing connected to >>>>>>>> the board as well. This just happened to me last night after issuing a >>>>>>>> reboot command from the command line. >>>>>>>> >>>>>>>> I remember at some point you all were talking about something about >>>>>>>> the "ramp time" of the PMIC or something. >>>>>>>> >>>>>>>> On Wed, Dec 2, 2015 at 3:11 PM, Gerald Coley < >>>>>>>> ger...@beagleboard.org> wrote: >>>>>>>> >>>>>>>>> I would start with your cape design and try and rule that out >>>>>>>>> first. >>>>>>>>> >>>>>>>>> The reset is an input pin read by the processor, not actually a HW >>>>>>>>> power reset. If the SW is locked up, this could happen. >>>>>>>>> >>>>>>>>> If you hold the power button for a 8 seconds or more the board >>>>>>>>> should power cycle. >>>>>>>>> >>>>>>>>> When it is in this state, what do the voltages read? >>>>>>>>> >>>>>>>>> Gerald >>>>>>>>> >>>>>>>>> >>>>>>>>> On Wed, Dec 2, 2015 at 3:54 PM, Jonathan Ross < >>>>>>>>> jonr...@nephology.org> wrote: >>>>>>>>> >>>>>>>>>> Once in a blue moon one of my beaglebones will get into a state >>>>>>>>>> where it has power (the power LED is lit), but it is not booted. >>>>>>>>>> Normally >>>>>>>>>> this would be fine, just hit the power button to reset. But in this >>>>>>>>>> weird >>>>>>>>>> state the power button does nothing. The reset button does nothing. >>>>>>>>>> I checked the power and reset button pins on the header, the >>>>>>>>>> power was low, the reset was high. >>>>>>>>>> The only way to get the board out of this state was to pull the >>>>>>>>>> 5V power. >>>>>>>>>> I'm using a KL16 on a cape to do a watchdog on the BB, and reboot >>>>>>>>>> it via power and/or reset buttons on the header if the BB stops >>>>>>>>>> sending >>>>>>>>>> checkins over uart. This has been working great, except for the rare >>>>>>>>>> case >>>>>>>>>> where the board ends up in this state where the power and reset >>>>>>>>>> buttons are >>>>>>>>>> not functioning. >>>>>>>>>> Any ideas how the BB could get into this state, and if there's >>>>>>>>>> any other way to force a reboot other than physically pulling the 5v >>>>>>>>>> power? >>>>>>>>>> Thanks, >>>>>>>>>> JR >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> 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. >>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> Gerald >>>>>>>>> >>>>>>>>> ger...@beagleboard.org >>>>>>>>> http://beagleboard.org/ >>>>>>>>> >>>>>>>>> -- >>>>>>>>> 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. >>>>>>>>> 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. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Gerald >>>>>>> >>>>>>> ger...@beagleboard.org >>>>>>> http://beagleboard.org/ >>>>>>> >>>>>>> -- >>>>>>> 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. >>>>>>> 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. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Gerald >>>>> >>>>> ger...@beagleboard.org >>>>> http://beagleboard.org/ >>>>> >>>>> -- >>>>> 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. >>>>> 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. >>>> 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. >>>> 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. >>> 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. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- For more options, visit http://beagleboard.org/discuss --- You received 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