And again :) https://www.microchip.com/design-centers/memory/serial-eeprom/mac-address-and-unique-id-eeproms
On Tue, Aug 6, 2019 at 1:49 PM Adrian Godwin <artgod...@gmail.com> wrote: > Here is a link to Microchip's preprogrammed MAC address eeproms > > On Tue, Aug 6, 2019 at 3:23 AM Graham <gh78...@gmail.com> wrote: > >> 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 >> <https://groups.google.com/d/msgid/beagleboard/CAC_N71qLHpLin6jsuF0aj50tmQUPHKi3BB589FwcKSoTByU8xQ%40mail.gmail.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. 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