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Last Post 04 Dec 2018 08:09 AM by  Adam Ford
OVM7692 camera interface with DM3730 Torpedo Kit
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Swathi CA



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Posts:4
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13 Nov 2018 06:28 AM

    Hi,

    We want to connect a OVM7692 camera to a DM3730 Torpedo + Wireless kit. I need few clarifications:

    1) Can we connect the OVM7692 camera to the DM3730 Torpedo + Wireless kit OR do we need to use a OVM7692 camera development board?

    1) OVM7692 powers supply is a 2.8V but the  DM3730 Torpedo + Wireless kit uses 1.8V Do we need a adapter board to connect the OVM7692 camera with the  DM3730 Torpedo + Wireless kit?

    3) Is there LInux BSP driver code changes required for this combination?

    Any help will be appreciated.

    Thanks,

    Swathi


    Adam Ford



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    Posts:754
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    13 Nov 2018 07:40 AM
    The Torpedo itself supports 8-bit parallel CSI interface for the camera interface and it's operational at 1.8V. While The baseboard was designed to work with a Leopard Imaging LI-5M04, we have had customers use other cameras with success. The signals themselves are industry standard CSI, but so some sort of adapter board may be required to electrically connect different camera modules to make the pin-out match what the baseboard is expecting. The base board also level shifters to change from 1.8V to the operating voltage of the camera, and the schematic of the baseboard has a table of resistor values to change the CAM_VIO to a variety of voltage levels if necessary. This would technically void the warranty of the baseboard, but it's there to provide some flexibility for customers who need some different values.

    The most difficult part would be the camera driver itself. I scanned through the Linux source code at Kernel.org, but I didn't find any source code for the OVM7692 sensor. You might contact the manufacturer to see if they have a driver. If they do, we have a services group that could help integrate the driver into one of our BSP's under a contract. Let us know if you'd like me to have someone reach out to you.

    Thank you,

    adam


    Swathi CA



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    Posts:4
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    15 Nov 2018 01:21 AM
    Thanks for the response.
    I have read that "A driver does exist for the OV7690 in the DM37x Linux 2.4-2 BSP using Linux 3.0." from the documents shared for DM3730 on support.logicpd.com website.
    Could you please let us know if the linux driver for OV7690 is supported in Linux BSP 4.03. If so, where can I find the Linux BSP to download?

    Thanks,
    Swathi

    Adam Ford



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    Posts:754
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    19 Nov 2018 08:35 AM
    We don't have a BSP 4.03. We have a 2.4-2, 2.4-3 and 2.4-4 BSP all based on a 3.0.x kernel, and we have BSP's based on 4.4 Kernel and 4.9 Kernel.

    I reviewed the Linux User Guide for our 2.4-4 BSP which is an evolution of the 2.4-2 BSP, and the OV7690 driver is present there, unfortunately I don't have the hardware to test this code, so I cannot verify the functionality.

    However, I was able to locate the the board file which initializes the camera, and it is located: arch/arm/mach-omap2/board-omap3logic.c If you need to modify the settings for the camera, you should be able to start there.

    In order to download the BSP's, you'll need to make sure you've registered a SOM and or development kit on our support site. Our contracts person will do denied party screening, and then he grants permissions.

    Our torpedo page is located:
    http://support.logicpd.com/ProductD...doSOM.aspx

    Our recommendation for building these Kernels is to use a Virtual Box VM which is located here: http://support.logicpd.com/DesktopM...ntryId=858

    This VM is has the dependencies already setup and the build environment should be ready to go.

    The corresponding User Guide is located: http://support.logicpd.com/DesktopM...tryId=1392

    adam

    Swathi CA



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    Posts:4
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    03 Dec 2018 11:50 PM

    Thanks Adam.
    We have purchased Davinci DM3730 Logic PD Zoom kit. After setting up the board as per the manual. I observed that the:
    1) DM3730 Torpedo + Wireless SOM is not booting up (No UART logs and LCD display). And also the chip is heating up. Is there anything I can do to confirm the behavior. Do I need to raise a request for replacement?
    2) DM3730 Torpedo SOM is booting up and UART logs are seen. But it is not taking the IPAddress. The following error is seen:

    "Setting up networking on loopback device:
    Setting up networking on eth0:
    udhcpc: SIOCGIFINDEX: No such device
    "

     

    Note:  I have started the product registration process.

     

    Thanks,
    Swathi


    Adam Ford



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    Posts:754
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    04 Dec 2018 08:08 AM
    Is sounds like you'll need an RMA for the Torpedo + Wireless that doesn't start.

    Can you post the boot logs on the device that isn't getting an IP address? I'd like to see if the driver is loading.

    Can you also check to the contents of /etc/network/interfaces

    There should be an entry in there for eth0. If not, it won't get an IP address. If you're using the 4.9 Kernel that we publish, look in section 4.4.1.4 about editing this file.

    adam

    Adam Ford



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    Posts:754
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    04 Dec 2018 08:09 AM

    I should note the RMA for the Torpedo + Wireless should route through the distributor where you purchased the SOM.

    adam

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