The programming of the MAC address in the EEPROM is not an issue, once you are set up for it. There are some other Ethernet connection options that you can turn on/off at the same time. But the program remembers what you want, and even auto-increments the MAC address for you if you are programming in sequence within a block assignment. The program also does a functional exercise of all kinds of Ethernet options, anything you have enabled, so it also constitutes a reasonable final test for Ethernet. Only takes 20 seconds or so. I think you will need to pin out the USB-2 (port 1) lines, so that you can get at them with a USB cable from the programming PC. If the PocketBeagle plugs into your carrier board, you could build a dummy USB connection board that temporarily replaced the PocketBeagle for Ethernet programming. --- Graham
== On Mon, Aug 5, 2019 at 8:48 PM evilwulfie <evilwul...@gmail.com> wrote: > assemble on 2 sides is no issue > populate one side, reflow solder, populate the other side, reflow solder > the surface tension will keep the parts on the other side IF the solder > even melts > > On 8/5/2019 5:57 PM, Steven Keller wrote: > > > Graham, > Thanks so much! That should be enough to get me started. I wanted to > avoid parts on the bottom of the board as it makes assembly more > difficult. Board size isn't too much of a problem. The extra EEPROM > programming step is a bit of pain but not impossible. > > Thanks again! > > On Monday, August 5, 2019 at 6:30:13 PM UTC-5, Graham wrote: >> >> Steven: >> The primary reason for parts on both sides of the boards is just space >> constraint. >> With an extra half square inch of space, everything could be on one side. >> I do like to keep the transient suppressor as close to the RJ-45 >> connector as possible. >> You would still need a four layer board to do the power distribution >> cleanly. >> >> In this design, the MAC address can not be assigned by the Linux driver. >> It takes a Windows app, from the Microchip website, that needs to access >> the LAN9500A >> chip from both sides to program it. That is, it needs to access both the >> USB-2 connection to the >> LAN9500A, and have the Ethernet connection from the LAN9500A on the same >> sub-net as the PC running the programming app. Even though the MAC >> address is >> held in an EEPROM, I don't think there would be any way for the user to >> change it >> without reproducing the programming connections. >> >> I am not aware that Microchip sells preprogrammed EEPROMS with the MAC >> addresses, >> normally you get blank EEPROMS and you supply and program the MAC >> address. >> Although for extra money, you can get either Microchip or some of the >> distributors to program >> memory parts. >> >> I have heard that Microchip will sell a small number of MAC addresses as >> a courtesy, >> but I have not done that. The normal process is to buy a block of MAC >> assignments >> from the IEEE which is the global coordinator. If you buy a large enough >> block, you get >> your own OUI. >> >> --- Graham >> >> == >> >> On Mon, Aug 5, 2019 at 3:21 PM Steven Keller <skelle...@gmail.com> wrote: >> >>> Graham, >>> If you don't mind could you answer a few questions? >>> You have parts on both sides of the board. Is this primarily because of >>> the size constraint or to keep traces short as possible? >>> Is it possible for the driver software to load the MAC address of the >>> Beagle Bone into the LAN9500A? It does not appear that the preprogrammed >>> MAC address EEPROMs from Microchip work with these USB-to-Ethernet chips. >>> >>> -- > 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/86df597a-f542-4f96-b82e-35982fa3db38%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/86df597a-f542-4f96-b82e-35982fa3db38%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/GGhpOK-i5-4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/72d488f5-2ac8-4b27-d111-ec66ad22dab6%40gmail.com > <https://groups.google.com/d/msgid/beagleboard/72d488f5-2ac8-4b27-d111-ec66ad22dab6%40gmail.com?utm_medium=email&utm_source=footer> > . > -- 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/CAC_N71qLHpLin6jsuF0aj50tmQUPHKi3BB589FwcKSoTByU8xQ%40mail.gmail.com.
