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Forum No Serial Ports after Installing BB View
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  • beagleboneblack
  • bbb
  • uart
  • view
  • display
  • serial
Related

No Serial Ports after Installing BB View

Former Member
Former Member over 11 years ago

I installed BB View on the Beaglebone Black with the latest angstrom.

After installing the display kernel the display works well.

But now the serial ports (uart 1 - 4, ttyO1 - ttyO4) do not work anymore.

Before installing thy worked with my software.

 

Can somebody help?

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  • Former Member
    0 Former Member over 11 years ago

    At least some of the pins needed for the BB-View conflict with the pins needed for the uarts, so having everything working at the same time will not be possible.

     

    You may be able to have a subset that will work together, but this will depend on what software you're using.  For example, if you're using an overlay for the BB-View and another for all of the serial ports, then all it takes is one pin to conflict and one of the overlays will not load.

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  • rattustrattus
    0 rattustrattus over 11 years ago in reply to Former Member

    Glad I am not the only person with this problem .... shame the BB View takes all the UARTS out .... looks like I will need to fudge it with a USB to serial adapter image Anyone know if the LCD7 Cape is as greedy with things off hand?

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  • Former Member
    0 Former Member over 11 years ago in reply to rattustrattus

    Any of the LCD capes will use a set of the same pins, they're the same as are used for HDMI, nothing much you can do about those.

    The rest is down to how many buttons, leds and such like that the cape has.  Things like buttons and LEDS could be physically removed and then taken out of the devicetree if you need those pins for other purposes..

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  • rattustrattus
    0 rattustrattus over 11 years ago in reply to Former Member

    Interesting idea looking at buttons etc its something I hadn't considered and looking at the info on the cape pin out I could by removing two buttons free up 2 UARTs time to look at rebuilding the kernel imagelooks like another "interesting" job.

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  • Former Member
    0 Former Member over 11 years ago

    Well this WELL and TRULY sucks!  If I had know this I would not have ordered this product.  Funny that the HDMI seems to work just fine with (at least serial1) simultaneously.

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  • Former Member
    0 Former Member over 11 years ago in reply to Former Member

    Well you need to consider that the cape includes some other stuff like buttons and LED's, so it's the HDMI pins plus several others.  All it takes is a single thing to conflict and you're unable to use both.

     

    As I said previously, if you don't use those buttons or LEDs you could remove them from the devicetree and use them for other things - at least as long as they don't conflict electrically with whatever you want to use them for. Even then, a few minutes with a soldering iron can fix that too!

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  • Former Member
    0 Former Member over 11 years ago in reply to Former Member

    Solder?  De-solder?  Reprogram?  God Almighty!

     

    I don't even have it yet and already I don't want it!  Only ordered it yesterday via Amazon.  I shoulda known.

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  • rattustrattus
    0 rattustrattus over 11 years ago in reply to Former Member

    Its a cheap display which looks good when working if you don't want to desolder look at a usb serial dongle I got a two port one but they do go up to 4 and it will probably still be cheaper than the alternative display.

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  • Former Member
    0 Former Member over 11 years ago in reply to rattustrattus

    The BBB works with an HDMI tv/monitor but I was hoping for something I could tote around.  For local tinkering I'm just ssh'ing into it via local Ethernet and command line.  I wanted to try whatever windowing interface Debian has on it.

     

    Ultimately, I will be using one serial port for the GPS, a USB dongle for wifi, and at least one of the I2C ports for 12 devices (engine temps, accel, gyro, and etc.), and an undetermined method (now that this screen won't work) to display my temps and stuff.

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  • Former Member
    0 Former Member over 11 years ago in reply to Former Member

    lol.. the screen works just fine, but it seems you failed to do any research into what pins it uses before you bought it..  Do your research. You'll find that it conflicts with some of the I2C pins as well.

     

    Hopefully one good thing will come from this - you'll learn from your mistakes and not repeat them next time image

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