You know, I've had my hand on 4 BBB's and well over 40 BBG's and have yet to see this problem manifest it's self.
On Mon, Dec 19, 2016 at 3:17 PM, <sslup...@scanimetrics.com> wrote: > Hi Gerald, > > I saw your comment in response to the question about another revision to > the BBB. There is a long standing issue with the BBB reset related to the > Ethernet PHY not coming out of reset properly. In order to work around the > problem you need to hack the board and drive the Ethernet PHY with a GPIO > to ensure the proper reset timing for the PHY. > > Is there any plan by CircuitCo to make a revision to address this issue? > Its a rather tricky hack to do because you have to drill out one of the > via's to do it properly and that takes a special laser to do it. > > Here is another link to a post on the TI forum that also discusses this > issue and I have seen it discussed here as well. I am not aware of any > software revision that has addressed this but perhaps there has been a > software fix? > > Phy Address Issue beaglebone U-boot - Sitara Processors Forum - Sitara™ > Processors - TI E2E Community > <https://e2e.ti.com/support/arm/sitara_arm/f/791/t/366351> > > Thank you, > Steve > > > On Sunday, June 14, 2015 at 6:31:58 PM UTC-6, John Reeve wrote: >> >> Hi All, >> >> I have a pair of BBB's that I bought from Canada Robotix. They are both >> Rev C boards from Element 14. I've been running debian on a micro SD card >> on each of them. The one board had been running a web server for about 2 >> months straight, but suddenly lost Ethernet capabilities one day. Both the >> Ethernet LED's stay ON solid even when no cable is plugged in. I tried to >> rule out software by loading up a couple different OS's but none of them >> can connect to my network. I even tried flashing an experimental version of >> debian from the beagleboard.org wiki but that did not work either. When >> I boot into debian now I notice the ethernet lights blink for a bit then >> stop and stay on solid, and I get messages from dmesg like: >> >> root@beaglebone:/var/lib/cloud9# dmesg | grep phy >> [ 0.000000] Booting Linux on physical CPU 0x0 >> [ 2.715169] 47401300.usb-phy supply vcc not found, using dummy >> regulator >> [ 2.830812] 47401b00.usb-phy supply vcc not found, using dummy >> regulator >> [ 3.392979] davinci_mdio 4a101000.mdio: detected phy mask fffffffe >> [ 3.399823] libphy: 4a101000.mdio: probed >> [ 3.399859] davinci_mdio 4a101000.mdio: phy[0]: device >> 4a101000.mdio:00, driver SMSC LAN8710/LAN8720 >> [ 13.783697] net eth0: phy found : id is : 0x7c0f1 >> [ 13.783894] libphy: PHY 4a101000.mdio:01 not found >> [ 13.788720] net eth0: phy 4a101000.mdio:01 not found on slave 1 >> [ 16.863473] libphy: 4a101000.mdio:00 - Link is Up - 100/Full >> [ 46.943180] libphy: 4a101000.mdio:00 - Link is Down >> [ 71.703444] libphy: 4a101000.mdio:00 - Link is Up - 100/Full >> [ 79.783276] libphy: 4a101000.mdio:00 - Link is Down >> [ 111.023649] libphy: 4a101000.mdio:00 - Link is Up - 100/Full >> [ 233.103186] libphy: 4a101000.mdio:00 - Link is Down >> [ 369.103554] libphy: 4a101000.mdio:00 - Link is Up - 100/Full >> [ 385.183238] libphy: 4a101000.mdio:00 - Link is Down >> etc...... etc.... >> >> Does anyone have experience with this type of problem? >> Other info: >> root@beaglebone:/var/lib/cloud9# uname -a >> Linux beaglebone 3.14.43-ti-r67 #1 SMP PREEMPT Thu Jun 4 20:37:18 UTC >> 2015 armv7l GNU/Linux >> >> Everything else seems to work. >> >> Thanks! >> >> -John >> >> . >> > -- > 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/4ad554f4-4cb9-440e-974f-120eb55266a8%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/4ad554f4-4cb9-440e-974f-120eb55266a8%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > 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/CALHSORrSWmpJ4nL9chESScoXScvd06HyKy-aDmikBOA%3DFLra9g%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
