Search

Technical Discussion Group Forum

This forum is provided for user discussion. While Beacon EmbeddedWorks support staff and engineers participate, Beacon EmbeddedWorks does not guarantee the accuracy of all information within in the Technical Discussion Group (TDG).

The "Articles" forums provide brief Articles written by Beacon EmbeddedWorks engineers that address the most frequently asked technical questions.

To receive email notifications when updates are posted for a Beacon EmbeddedWorks product download, please subscribe to the TDG Forum of interest.

TDG Forum

PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 06 Feb 2014 01:41 AM by  George Barney
OMAP-L138 - GPIO - Expansion Headers
 3 Replies
Sort:
You are not authorized to post a reply.
Author Messages
steven.eckhoff
Basic Member
Basic Member
Posts:192


--
05 Feb 2014 09:35 AM

    Q:

    Subject    
    Accessing GPIO
    Product    
    OMAP-L138 SOM-M1
    Software OS    
    Linux
    Part Number    
    1016660
    Description    
    Hello,

    I am using your OMAP-L138 EVM board for a senior design project and I was trying to figure out if I can use the expansion headers on the board as GPIO pins. Our team was lent the board from our professor, and he seems to have misplaced the expansion board as well as the linux SD card,

    Is there any documentation that shows how to access the expansion headers?
    Thanks
    George

    A: You can purchase new expansion headers from http://createnewstuff.com/

    To recreate the SD card you can refer to our Linux User's Guide [1] or use our VM [2][3] which is already setup to build the images. If you haven't registered an account and registered a kit, you will need to do so before you can access the downloads. If you have any trouble with that please contact me at platformsupport@logicpd.com.

    [1] http://support.logicpd.co...d=0&EntryId=1424

    [2] http://support.logicpd.co...id=0&EntryId=988

    [3] http://support.logicpd.co...d=0&EntryId=1426

    George Barney
    New Member
    New Member
    Posts:3


    --
    05 Feb 2014 10:16 AM
    Thank you for your reply. I checked out the website you suggested and it looks like they do not have any in stock. Do y'all have any other providers for these types of expansions? We unfortunately cannot afford $200 for a connector on our student projects budget.

    Thanks again for your help!
    steven.eckhoff
    Basic Member
    Basic Member
    Posts:192


    --
    05 Feb 2014 10:57 AM
    George,

    The price does seem quite high. We are not affilitated with the producer of those boards, so we do not have any in excess.

    How many GPIOs do you need?

    Do you have time to produce your own? There are PCB manufacturers that provide academic discounts. I believe I paid around 50 bucks at one time for a two layer board with an academic discount.

    The other thought would be, if you need the GPIOs coming out of the DF40C-100DS-0.4V(51) connector, you could try to attach blue wire to the vias around the connector to gain access.
    George Barney
    New Member
    New Member
    Posts:3


    --
    06 Feb 2014 01:41 AM
    I can an expansion board. I dont think that would be too bad, especially since I can do a one sided board.

    I really only need 8 GPIO pins. The part I am stuck on is accessing the GPIO pins through Linux. Any ideas on how to do that?
    You are not authorized to post a reply.