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Preview on the fly issue

ellen wang
Intellectual 635 points

Here's the image loaded from the DDR when I open the CCDC.(640*480)

The sensor outputs raw bayer pattern without any processing, and I don't use any daughter card to capture the image.

I connect the databus to the DC_P1.& P2

Because the raw bayer pattern dosen't  go through the preview engine , it's gray scale when displayed on CCS.

Each pixel represents one color.

The preview sample C:\dvsdk_1_01_00_15\psp_1_00_02_00\pspdrivers\system\dm6437\bios\dm6437_evm\src\video\sample\previewer

There's an input image in the sample ,which is also raw bayer pattern like mine.

I should use the preview on the fly ,but it always gets error at CCDC exchange !!!

I have no clue what's the problem here .............

I find many topics like this in the forum ,but it seems there's no solution..........

thank you .

Ellen.

  • 0
    Intellectual 635 points

    Hi :

    Few questions about the preview on the fly (DM6437):

    1. The data from the sensor must be 10-bits to the CCD controller ? or it can be 8-bit or ...etc ?

    2. Is there any way to check if the PSP_VIDEO_PATH_ENABLE is well defined ? I've de-comment the line .

    Thanks a lot .

    Ellen.

  • 0 in reply to ellen wang
    Intellectual 685 points

    Hi,

    I am not a TI employee, but can confirm that a 8-bits bayer sensor can successfully work with a DM6437. Here are some hints you can look at:

    1- First I would recommend you to use the latest PSP package which is 1.10.03 (http://software-dl.ti.com/dsps/dsps_registered_sw/sdo_sb/targetcontent/psp/bios_psp/index.html#DSPBIOS_5.3x-based_Platform_Support_DM648)

    2- To make sure the PSP_VIDEO_PATH_ENABLE is defined, don't take any chance and reload the vpfe driver project (PSP_1_10_03\packages\ti\sdo\pspdrivers\drivers\vpfe) and rebuild it with the definition enabled. Then make sure to link the resulting library in your application.

    3- Make sure to carefully read the previewer and ccdc driver documentation (PSP_1_10_03\packages\ti\sdo\pspdrivers\drivers\vpfe\docs and PSP_1_10_03\packages\ti\sdo\pspdrivers\drivers\previewer\docs) to make sure you correctly follow the amazing number of constraints you must comply with when using on the fly mode. Also read the VPFE user guide (spru977d - TMS320DM643x DMP Video Processing Front End (VPFE) User's Guide.pdf) and more specifically sections about the CCDC and Previewer. Constraints that you must follow are listed in this document.

    4- When working on the fly, make sure to create the previewer channel driver before creating the CCDC channel driver. That is:

    GIO_create("/previewer", IOM_INOUT, NULL, &createMode, NULL);
    and GIO_control(PREV_Handle, PSP_PREVIEWER_IOCTL_SET_PARAMS, &PREV_Config);

    must come before

    FVID_create("/VPFE0", IOM_INOUT, NULL, &vpfeParams, NULL);

    5- Make sure to queue at least one buffer in the CCDC driver before calling exchange():

    FVID_queue(CCDC_Handle, PFrame)

    Hope it helps.

    Regards

    Franck

  • 0 in reply to Franck
    Intellectual 635 points

    Thanks a lot , Franck:


    I 've installed the dvsdk_1_11_00_00 and pspdrivers_1_10_03


    And here's the problem when I open the preview on the fly project:

    ti/sdo/pspdrivers/system/dm6437/bios/evmDM6437/video/fvid.h

    I browse the file here and open the project:

    ti\sdo\pspdrivers\system\dm6437\bios\evmDM6437\video/fvid.h

    After I open the project and compile ,some error happens which are :

    "i2cParams_evmdm6437.c", line 47: fatal error: could not open source file "ti/sdo/pspdrivers/drivers/i2c/psp_i2c.h"

    "MT9001_extImageSensor.c", line 48: fatal error: could not open source file "ti/sdo/pspdrivers/system/dm6437/bios/evmDM6437/video/src/psp_i2c_interface.h"
    1 fatal error detected in the compilation of "MT9001_extImageSensor.c".

    "psp_i2c_interface.c", line 50: fatal error: could not open source file "ti/sdo/pspdrivers/common/psp_common.h"

    "psp_bios_vpfe_st_on_the_fly_sample.c", line 53: fatal error: could not open source file "ti/sdo/pspdrivers/pal_sys/dm6437/pal_sys.h"

    Could you give me some hint about the error ,it seems the path is not correct .

    Best regard.

    Ellen.

  • 0 in reply to ellen wang
    Intellectual 685 points

    I never tried to compile sample projects for the EVMDM6437 eval board, but it looks like your include path is only missing the PSP package root directory. Only add the /package directory (just under the PSP installation directory) to your include path in your project and it should find those files....

  • 0 in reply to Franck
    Intellectual 635 points

    thank you ,Frank .

    I really appreciate.

    I' ve successfully work on the preview on the fly.

    It's because I have to reload the vpfe driver !!!

    I used to de-comment the #define VIDEO_PATH_ENABLE,but I didn't rebuild the vpfe driver.

    thank you very much !!!!