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Anything special to get USB to work on the side of the case?

garengllc

I have a Moto Z and was hoping to connect an RTL-SDR dongle to the side of the proto case.  I attempted to setup the dip switches to enable the USB 3.1 interface and connected a USB OTG cable, but the phone is still not recognizing the device (I am using the middle USB connection).  Is there something else that I am missing?

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  • 0

    after fixing the app clear issue with MDK (so MDK works again) I can also not see the microOTG memory stick connected to microUSB B connector, do not know why.

     

    EDIT:

     

    moto-Z USB-C to usb host, USB3 Stick works (without MDK)

    moto-Z MDK mid USBC same cable same usb stick does not work

    moto-Z usb stick in microUSB does not work

     

    I guess the manifest may have to be changed??

  • 0 in reply to anttibrain

    Some notes on USB to try and answer several of the questions here.

    USB3 is literally just that, the USB3 PHY.  It does not include the additional lines for USB2 (those have their own dedicated interface).  You *may* look and find a device that will route USB2 traffic over USB3 for you, which would be handy in a dock type configuration.  Additionally, when using USB3.0, the MDK does not support reversible cables.  If your device does not enumerate, try flipping the cable.  The existing 'compute' example firmware has support for attaching USB3.0 devices to the middle port on the MDK.
    If it enumerates when attached to the Moto Z with an OTG cable, it should work through the MDK.  Please take a look at the new usb2 sample firmware posted for basic connectivity.  Please note that the MDK does not support hot plug detect for USB2.
    So if you didn't write any firmware with the USB-Ext protocol, that's probably a big reason why USB isn't working.  It's always good to attempt a direct connection to Moto Z with an OTG cable to ensure you understand that devices behavior when it enumerates.
  • 0 in reply to flowflow25

    Thank you and Christian!

     

    I realized that I was having issues with my Aukey USB-C to uUSB adapter -> uUSB OTG to USB -> thumbdrive USB 2.0 connection.  When I changed to a USBC USB OTG to USB -> thumbdrive USB 2.0 it was happy when plugged directly into the phone with no MDK.  So thank you for helping me to realize some sort of hardware issue on my side.

     

    I still have had no luck getting the thumbdrive to enumerate on the side of the MDK.  I have not touched the firmware on the MDK at all, is that necessary for just routing USB 2.0 through the MDK to the side, or only if I try to access the USB from the protoboard personality card?

  • 0 in reply to garengllc

    Read the response, the MDK USB connectors DO NOT AUTO DETECT usb devices !!!

     

    so you need to change the firmware!

  • 0 in reply to garengllc

    OK, it was still unclear to me before, but I think I've got it now (been reading up on it this morning).  I see the example talked about here: https://developer.motorola.com/build/examples/misc , but I don't see where the download that example.  I guess I am missing an SDK or something, I will go hunting for that now.

  • 0 in reply to anttibrain

    OK, I went through all the install steps and everything seemed to go off without a hitch.  I then:

    cd $BUILD_TOP/nuttx/nuttx/tools

    ./configure.sh hdk/muc/usb2

    cd ~/MDKfirmware/muc-loader

    openocd -f board/moto_mdk_muc_reset.cfg -c "program ./out/boot_hdk.bin 0x08000000 reset exit"

    cd ~/MDKfirmware/nuttx/nuttx

    openocd -f board/moto_mdk_muc_reset.cfg -c "program nuttx.tftf 0x08008000 reset exit"

     

    I connected my MDK to the phone and powered it up.  It recognized a non-certified firmware (or something to that effect), and I allowed it access.  I then plugged in my thumb drive and it doesn't enumerate.  I even tried booting with the thumbdrive plugged in, but still no dice.  What might I be missing?

     

    <<edit>>

    Also of note is that all dip switches are set to the OFF position.  I did try setting A4 to ON, but that didn't help either.

  • 0 in reply to garengllc

    The example is in nuttx/nuttx/configs/hdk/muc/

    You'll see the usb2 project here, and the stm32_usbext_usb2.c file in the src directory.

    You may need to do a 'git pull' on the nuttx repository, it was just pushed last weekend.

  • 0 in reply to flowflow25

    Thanks. I posted something on FRI about my steps, but it got attached further up in the thread where it is easy to overlook.  I managed to build and install the usb2 project to the MDK.  Through a lot of trial and error, I can get the USB 2.0 to work on the 3rd USB port on the side (the uUSB connector) if I set A3=ON and A4=OFF.  I thought that if I set A3=OFF and A4=ON that the middle USB port would work for USB 2.0, but I guess not...

  • 0 in reply to garengllc

    Actually that looks correct.

    USB on TypeC: A3 = off, A4 = on

    USB on microB: A3 = on, A4 = off

     

    1. Are you using an OTG cable with the TypeC port?  If not, you may try a Hub.

    2. Have you tried flipping the cable?

     

    I just verified here with the usb2 firmware and a USB2 device attached to a hub attached to USB2 (middle TypeC).  You may also use an OTG cable instead of a hub.  Did you move away from using USB3.1, or that was overkill?

  • 0 in reply to flowflow25

    I just tried A3 = off, A4 = on again and still no dice.  The USB-C on the bottom of the phone works, but the missdle USB port on the side does not.

     

    I am using an OTG cable with the TypeC port.

     

    I tried flipping the cable, still no love.....

    I moved away from 3.1.  I have a 2.0 device, so I needed to go that path. I was thinking that in 3.1 it would be backwards compatible, so I was interested in that route, but you explained why that isn't so.

     

    I obviously got the usb2 project loaded properly, but I cannot for the life of me figure out why the middle USB port won't work.

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  • 0 in reply to flowflow25

    I just tried A3 = off, A4 = on again and still no dice.  The USB-C on the bottom of the phone works, but the missdle USB port on the side does not.

     

    I am using an OTG cable with the TypeC port.

     

    I tried flipping the cable, still no love.....

    I moved away from 3.1.  I have a 2.0 device, so I needed to go that path. I was thinking that in 3.1 it would be backwards compatible, so I was interested in that route, but you explained why that isn't so.

     

    I obviously got the usb2 project loaded properly, but I cannot for the life of me figure out why the middle USB port won't work.

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