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  • in reply to: Serial over USB not working. #508
    biothundernxt
    Participant

    Double posting due to lack of edit button… (why?…)

    I managed to find (by reading other threads) that there is an otherwise undocumented ftp site.
    ftp://downloads.globalscaletechnologies.com/Downloads/Espressobin/
    Has many useful files it would seem, including the U-Boot image.
    Now I just need to learn how to flash it.

    in reply to: Jumpers on board #506
    biothundernxt
    Participant

    Bump?

    in reply to: Serial over USB not working. #505
    biothundernxt
    Participant

    Update…
    entering ‘h’ or ‘?’ returns this block of text…

    
    >h
    h/? - print this help screen
    r yyyyyyyy - read register/memory at address yyyyyyyy in hex
    w yyyyyyyy zzzzzzzz - write zzzzzzzz to address yyyyyyyy in hex
    j yyyyyyyy - jump to address yyyyyyyy in hex
    x y - change the boot mode, where y is in hex
    a - UART control passed to AP CPU ROM
    c - UART control passed to CM3 CPU ROM
    

    Any ideas?…
    I also still have no idea what to do about a messed up U-boot, if that is what is going on… There is no info on the wiki on u-boot, and I am pretty new to anything more complicated than a raspberry pi when it comes to SBCs, so I am pretty used to the lazy “download a .img file and apply it to an sd card.

    I’m pretty confident in my ability to learn, I just need a point in the right direction, maybe a link to some articles explaining how this stuff works. Google has not been helpful at all in that respect.

    in reply to: Serial over USB not working. #393
    biothundernxt
    Participant

    Where might I get the uboot image for this board? I cant seem to find it on the wiki anywhere…

    in reply to: Serial over USB not working. #392
    biothundernxt
    Participant

    Thanks, I will try that.

    in reply to: SD Image #348
    biothundernxt
    Participant

    So now, all I get when I connect to the serial over usb is a terminal that spits out an “E”.

    Example;

    root@ubuntu:/home/biothundernxt/Documents/Scripts# ls
    kermit-usb0
    root@ubuntu:/home/biothundernxt/Documents/Scripts# kermit kermit-usb0
    Connecting to /dev/ttyUSB0, speed 115200
     Escape character: Ctrl-\ (ASCII 28, FS): enabled
    Type the escape character followed by C to get back,
    or followed by ? to see other options.
    ----------------------------------------------------
    
    E
    >
    

    typing anything, regardless of what returns another

    E
    >
    

    so that hitting enter a few times now has the terminal full of this:

    >
    E
    >
    E
    >
    E
    >
    E
    >
    E
    >
    E
    >
    E
    >
    E
    >
    

    Pressing the reset button while connected produces an additional > character without a newline, like this:

    E
    >>
    

    such that pressing it multiple times produces many:

    E
    >>>>>>>>>>>>
    

    Any help would be greatly appreciated.

    in reply to: SD Image #344
    biothundernxt
    Participant

    I am starting to think that my board may be faulty in some way…
    I didn’t really think about it before, but I can also only reliably get a connection over the USB to serial if the 12v barrel jack is plugged in.
    The LED turns on with just usb, but it is much dimmer, and while I detect the serial adapter, I cannot get in.
    Plugging in the barrel jack instantly causes the device to boot.

    Removing power also causes the LED to very slowly dim over time rather than immediately turn off as I would expect it to.

    in reply to: SD Image #343
    biothundernxt
    Participant

    Thanks for the help, but I am still having issues.
    After figuring out that I needed to also download the kernel, and put it into boot, I managed to get things together, and all the files are where they should be, but now when I try to boot, I get:

    run bootmmc                                  
    switch to partitions #0, OK
    mmc0 is current device
    ** File not found var/Image **
    ** File not found var/armada-3720-community.dtb **
    Bad Linux ARM64 Image magic!

    And then when running ext4ls, I get

    Marvell>> ext4ls mmc 0:1
    <DIR>       4096 .
    <DIR>       4096 ..
    <DIR>      16384 lost+found
    <DIR>          0 media
    <DIR>       4096 bin
    <DIR>       4096 proc
    <DIR>          0 tmp
    <DIR>         36 dev
    <DIR>       4096 sys
    <DIR>          0 lib
    <DIR>       4096 var
    <DIR>        663 root
    <DIR>        653 etc
    <DIR>          0 boot
    <DIR>          0 usr
    <DIR>       4096 mnt
    <DIR>       4096 srv
    <DIR>       4096 run
    <DIR>       4096 opt
    <DIR>       4096 sbin
    <DIR>       4096 home

    Which does not match the guide, because the numbers are different…
    And running this…;

    ext4ls mmc 0:1 boot

    Returns nothing, as though it was empty.
    I know there are files in there though, browsing to that directory on my desktop finds the files… I am very confused.

    in reply to: MiniPCIe slot full specs #324
    biothundernxt
    Participant

    I am very interested to see what chip they decide to include with the retail units, as I am having trouble finding any decent wifi cards that have wireless AC, dual band, bluetooth 4.?, decent linux drivers, and mini pcie, not M.2

    I dont know if the intel 7xxx or 8xxx series AC wifi chips have good linux drivers, but they look really good for the price, though they only come in M.2 🙁

    They have been very cagey about info on the chip so far, so far as to not even say what chipset maker they plan on going with (atheros, broadcom, etc.)

    in reply to: Performance (Router) #323
    biothundernxt
    Participant

    That performance is to be expected from the dedicated switch built in, it is likely not having to do much if any processing on the marvell’s end. The performance with NAT/Firewall will likely be substantially less.
    Once I get mine running I will post some benchmark numbers here around NAT/firewall, and tunneling such as openvpn. I don’t expect much, as my 32 thread xeon is barely able to do 700Mbps without heavy optimizations, but they advertised some hardware accelerated crypto on the SOC, so it would be interesting to see if it is able to do openvpn traffic at 100Mbps, as that is the speed of my internet uplink.

    in reply to: heat sink #322
    biothundernxt
    Participant

    I would think it would be the same as on other SBCs like the pi, I will test once I get an OS running.
    I will resign to ubuntu if I must, though I was really hoping to get the buildroot tutorial to work for me.
    The buildroot guide keeps giving me errors on building with make.

    I know a fan + heatsink is overkill, the image was a joke, however if in an enclosed space, or somewhere with stagnant air, a heatsink alone does virtually nothing but provide a heat buffer. I was mostly suggesting a fan without a heatsink to help with spikes in usage, though thinking about the rebooting described by the OP, it seems more likely than heat that the board was rebooting from a voltage drop.

    espressobin@kalvdans.no-ip.org, do you have a voltmeter to test the voltage when it happens? What power supply are you using, 5v USB, or the provided 12v wall wart?

    in reply to: heat sink #317
    biothundernxt
    Participant

    You can’t go wrong with something like this!
    Overkill Heatsink MickMake

    In all seriousness though, I haven’t been able to get a root file system to compile with the guide so I cant say for myself about the issue, though if it is indeed overheating when under intense load, a plain heatsink will only delay the issue unless it is massive. Small aluminum heatsinks can provide a heat buffer for spikes in thermals, but anything continuous wants a fan.

    The GPIO header has 3.3v power, so you could power a small 3.3v fan, (just be careful that the fan you choose does not draw enough current to damage the board. Unfortunately I don’t know how many mA the 3.3v line is capable of.) or you could use a molex to standard computer case fan adapter and plug into the onboard molex plug for the power for the fan.
    null

    Any amount of airflow should be enough to keep it cool, without a heatsink. Unless the heatsink has particularly good thermal transfer and a good amount of surface area on the fins, you will likely see better thermal performance without it if you use a fan.

    in reply to: MiniPCIe slot full specs #304
    biothundernxt
    Participant

    Such as the ASUS PCE-AC88 4×4 Wireless AC3100. Seems like that would allow for it to be a nighthawk grade router with much more flexible firmware, for less money.

    in reply to: MiniPCIe slot full specs #302
    biothundernxt
    Participant

    Mini pcie to pcie x1 riser cards also exist; I wonder if we could use a better wifi card that way.

    in reply to: MiniPCIe slot full specs #295
    biothundernxt
    Participant

    I was planning to try this out when I get a chance, I have my unit, so if nobody else has given an answer before I get to trying that I will let you know.

Viewing 15 posts - 1 through 15 (of 15 total)
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