Create Account
Search
You are here: TDG Forum  >>  Texas Instruments SOMs and Development Kits  >>  OMAP35x, DM3730, AM3703 Torpedo SOM Development Kit  >>  Information GPIO_122 DM3730 -Torpedo Wireless

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 04 Jun 2018 12:24 PM by  Adam Ford
Information GPIO_122 DM3730 -Torpedo Wireless
 7 Replies
Sort:
You are not authorized to post a reply.
Author Messages
Sergey Brandis
New Member
New Member
Posts:79


--
04 Jun 2018 05:17 AM

    Hi ! 

    I  have some questions about GPIO_122. 

    In datasheet  DM3730_Technical Reference Manual I found that GPIO_122 :
    Adam Ford
    Advanced Member
    Advanced Member
    Posts:794


    --
    04 Jun 2018 07:04 AM
    I don't think there is a complete question. Can you re-state your question?

    thanks

    adam
    Sergey Brandis
    New Member
    New Member
    Posts:79


    --
    04 Jun 2018 07:12 AM

    Yeah. Of cource . I don't know about this bug on forum or my computer. But If you see I create 5 similar topic. Can you delete all and I repet my question.
    Sergey Brandis
    New Member
    New Member
    Posts:79


    --
    04 Jun 2018 07:12 AM

    Yeah. Of cource . I don't know about this bug on forum or my computer. But If you see I create 5 similar topic. Can you delete all and I repet my question.
    Sergey Brandis
    New Member
    New Member
    Posts:79


    --
    04 Jun 2018 08:43 AM

    Hi ! 

    I  have some questions about GPIO_122. 

    In datasheet  DM3730_Technical Reference Manual I found that GPIO_122 (pic.below): 

    https://ibb.co/jFPXNo

    But in source of WinCe. In platform.c  I found unexpected comment , that this GPIO_122 is included in USB OTG. When I  change mux_mode from 0 to 4. I set GPIO_122 as gpio, but my device didn't connect to PC host. (pic.below)

    https://ibb.co/eJ78Co

    Can we explain me which function had on GPIO_122? 

     

    Thanks a lot ! 
    Adam Ford
    Advanced Member
    Advanced Member
    Posts:794


    --
    04 Jun 2018 08:52 AM
    I am going to have to look into this. I am working remotely this morning, but the pin should be set to mux mode 0 for USB to function correctly.

    I hope to have an answer for you later this afternoon.

    adam
    Sergey Brandis
    New Member
    New Member
    Posts:79


    --
    04 Jun 2018 09:13 AM

    Thanks a lot . I wait your answer . Can you see my screenshots on my link in previous message ?  This pin answered for SD (on datasheet version),on source code in platform.c is written , that is USB OTG. When I change mux_mode , I can't connect to PC Host. 

     

     
    Adam Ford
    Advanced Member
    Advanced Member
    Posts:794


    --
    04 Jun 2018 12:24 PM
    I am not sure I fully understand your question, but I'll try to interpret what I think you are asking.

    The OTG controller (aka musb) uses a parallel interface with the PMIC (TPS65950 sometimes known as twl4030).

    The parallel interface uses the HSUSB0_DIR to set the direction of this data and it must be be in mode 0. (per your screen shot https://ibb.co/eJ78Co)

    If you're trying to use GPIO_122, that you made the system collide with the MMC controller, so if you've mounted the SD card in Windows and configured the GPIO_122 pin, it would disconnect because the MMC driver cannot communicate with the SD card (per your screen shot https://ibb.co/jFPXNo)

    If you want to setup GPIO_122, you do not change HSUSB0_DIR, but you would change MMC1_DAT1 to mode 4. HSUSB0_DIR should always be MODE0 if you want to use the USB.

    adam
    You are not authorized to post a reply.

    Forums Texas Instruments SOMs and Development Kits OMAP35x, DM3730, AM3703 Torpedo SOM Development Kit