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Forum BeagleBoneBlack - how to stop blink?
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Related

BeagleBoneBlack - how to stop blink?

Former Member
Former Member over 10 years ago

Hi,

2 weeks ago - I obtained BeagleBone black. I uninstalled completelly the following services:

cloud9.service

gateone.service

bonescript.service

bonescript.socket

bonescript-autorun.service

avahi-daemon.service

gdm.service

mpd.service

 

Following commands works well:

echo 39 > /sys/class/gpio/export

echo out > /sys/class/gpio/gpio39/direction

echo 1 > /sys/class/gpio/gpio39/value

 

But the GPIO ports flashes with frequency approximatelly 2 HZ. I cannot stop that. The timers aren't initialized. Additionally - I tested with external MMC card and Amstrong image. The situation is the same. I suppose - the processor has hardware defect.

Can you advice me - how to proceed?

 

Best regards:

Darin Masov

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  • shabaz
    shabaz over 10 years ago +1
    Hi Darin, There is a Single Board Computers location - better than Feedback and Support for your question. Ports don't flash - LEDs flash. There are LEDs on the BBB that flash by default - are you sure…
  • shabaz
    0 shabaz over 10 years ago

    Hi Darin,

     

    There is a Single Board Computers location - better than Feedback and Support for your question.

    Ports don't flash - LEDs flash. There are LEDs on the BBB that flash by default - are you sure you are not observing that?

    Or have you wired an LED of your own to a port?

    As mentioned in the other thread, there are ways to access the GPIO at up to around 2MHz, so 2Hz seems incorrect.

    The link mentioned in that thread shows how to connect up an LED to a GPIO on the BBB and control it the high speeds you may require.

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  • element14support
    0 element14support over 10 years ago

    Hello dmasov

    Welcome to the element14 Community, I will move this over to the BeagleBone Black area as it is a better fit.

     

    Thank you,

     

    Jamie

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