If you use the correct SW image, the issue is taken care of. The problem is that the SW assumes a MDIO address. The address can be corrupted by the processor pins changing state on power up and the rPHY cannnot read the strapping options correctly. As long as the SW scans for all address ranges, then it should work.
Gerald On Wed, Jul 8, 2015 at 11:50 AM, <nathan.taylor.sm...@gmail.com> wrote: > Gerald, > > Is there any known fix for this problem besides a physical reset, and can > be done from the command line? > > Thanks > > > > On Tuesday, August 19, 2014 at 2:48:31 PM UTC-5, Gerald wrote: >> >> I am. My name and contact information is on the cover page of the System >> Reference Manual. >> >> Gerald >> >> >> On Tue, Aug 19, 2014 at 7:52 AM, BB-REVC <mr.l...@gmail.com> wrote: >> >>> Could you post the link to the TI thread where this is discussed? >>> >>> Who is actually involved in choosing parts for the BBB and in adding >>> layout changes? I offer sending one of mine BBBs to someone involved in the >>> BBB developing process for evaluation purposes if requested. >>> >>> I mean this behavior is pretty annoying, this morning it took me almost >>> 20 attempts to get one BBB running with ethernet. Furthermore I assume that >>> many posts in forums related to non-working BBB ethernet may be related to >>> this problem. >>> >>> >>> >>> >>> Am Dienstag, 19. August 2014 14:35:58 UTC+2 schrieb karlka...@gmail.com: >>> >>>> I found a posting at TIs webbord regarding this problem. There a guy >>>> from TI described this as a bug in used PHY. Since the RESET-input of that >>>> PHY is not connected to a (switchable) output pin on the BBB, only power >>>> of/on helps to workaround this problem. With such a connection a software >>>> workaround would have been possible where the PHY is resetted by >>>> Ethernet-driver until it reacts as expected. >>>> >>>> >>>> Am Montag, 18. August 2014 14:42:14 UTC+2 schrieb BB-RevC: >>>>> >>>>> Good day, >>>>> >>>>> I have several *Beaglebone Black Rev C*. They are connected to my LAN >>>>> by using a static IP address. I observed that from time to time connecting >>>>> to the Beaglebone Black via ethernet is not possible. >>>>> >>>>> *I identified the following behavior:* >>>>> >>>>> The ethernet port has two LEDs, a Green one and an Orange/Yellow one. >>>>> If I apply power to the Beaglebone Black I noticed that the green LED >>>>> immediately starts to blink. However, the yellow LED stays very often >>>>> dark. *It >>>>> simply never blinks during the whole boot process of the board*. In >>>>> this case ethernet will not be available after booting linux and the board >>>>> can not be reached via ethernet. >>>>> >>>>> *My workaround:* >>>>> >>>>> >>>>> <https://lh4.googleusercontent.com/-ccszPy8rMis/U_Hz2KG6ngI/AAAAAAAAACM/mfEH9GBYDzE/s1600/bb_ethernet.png> >>>>> >>>>> >>>>> >>>>> >>>>> Is this a known respectively a bug? I observed this with several >>>>> Beaglebone Black Rev-C from Element 14. I also have 2 Rev-B boards and I >>>>> think (currently not 100% sure since these boards are not used at the >>>>> moment) that I observed the same behavior. >>>>> >>>> -- >>> 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. >>> 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.
