dm6437 rawcapture problem

ellen wang

Intellectual 635 points

Hi,

By using the dvsdk rawcapture sample.

I can get the image from my cmos sensor, which is mt9p001 connecting the databus to the DC_P1 & P2 on the dm6437 board.

The sensor outputs raw bayer pattern in 12-bits , and I use 8-bits only .

The following is my CCDC configuration :

static PSP_VPFECcdcConfigParams ccdcParams =
{
    FVID_CCDC_RAW_FORMAT,               /* dataFlow     */
    FVID_FIELD_MODE,                    /* ffMode       */
    480,                                /* height       */
    640,                              /* width        */
    640,                              /* pitch        */
    0,                                  /* horzStartPix */
    0,                                  /* vertStartPix */
    NULL,                               /* appCallback */
    {
        NULL,                           /* extVD Fxn    */
        NULL,
        NULL,
    },
    0,                                  /*segId         */
    {
        FVID_BPP_BITS8,                 /* dataSize     */
        PSP_VPFE_PACK8_8BITS_PIXEL,     /* pack8        */
        PSP_VPFE_DataPol_Normal,        /* dataPol      */
        PSP_VPFE_SyncPol_Positive,      /* VDSyncPol    */
        PSP_VPFE_SyncPol_Positive,      /* HDSyncPol    */
        PSP_VPFE_SyncDir_Input,         /* HDVDMaster   */
       50,                             /* HDSyncWidth */
        4,                              /* VDSyncWidth */
        800,                            /* numPxlPerLine*/
        1000,                           /* numLinPerFld */
        PSP_VPFE_ALaw_Disable,          /* ALawEnable   */
        PSP_VPFE_ALaw_bits15_6,         /* ALaw_Width   */

    }
};

I put the breakpoint right after the CCDC channel is created , so the VPBE is not open yet !

I use the view >> graph >> image by the configuration and two types palette option (gray & uniform).

The image is my desk with two computer screens ~

I'm not sure if the configuration is correct .......

It's strange that if I cover the image sensor , it should output all black 0x00 , right ?

I've checked the CMOS sensor output pins ,it outputs 0x00 for sure !!!

But there's always value at MSB in DDR memory like this:

hope for your help .

thanks.

Ellen

over 13 years ago

0 ellen wang over 13 years ago

Intellectual 635 points

BTW, I don't use any TI daughter card for capturing.

It's the original data without any processing from the cmos sensor !

0 ellen wang over 13 years ago in reply to ellen wang

Intellectual 635 points

Thank you ,

i've solved the problem.

it's because the CCD[7 : 0] on dm6437 is my data[0 : 7] on my sensor.

I connect the hardware wrong .

ellen

0 Akshay Panday over 13 years ago in reply to ellen wang

Expert 1640 points

Hi Ellen,

May I ask how you are connecting the CMOS sensor to the DM6437? I'm looking into acquiring a Aptina Sensor Head Board and a DM6437 EVM for a project.

But the video interface of the DM6437 has me a little confused as to how to connect the two. Do we need an adapter?

Regards,

Akshay

0 ellen wang over 13 years ago in reply to Akshay Panday

Intellectual 635 points

HI Akshay:

As I know , TI sales MT9T001 daughter card module .

what you need to do is to connect the daughter card on the board .

You can check the following web :

http://processors.wiki.ti.com/index.php/Using_the_Video_Port_Sub_System_(VPSS)_for_Inter-Processor_Communication

It seems the daughter card totally match the pins on the DC_P1 and DC_P2 slot .

I use the MT9P001 CMOS sensor ,it outputs12-bits digital signal, VD ,HD and Pixclk.

I don't have any daughter card .

You can find the corresponding pin assignment ( DC_P1 and DC_P2 ) in user guide of DM6437 .

Connect CMOS sensor to the pins on DC_P1 and DC_P2 , and disable the TVP5148 pin .

You could ask me if you still have any other question ~

Regards.

Ellen.

0 Akshay Panday over 13 years ago in reply to ellen wang

Expert 1640 points

Hi Ellen,

Thanks a lot for the info!

We are planning to get an aptina demo kit (like this http://www.aptina.com/products/demo_kits/mt9v034c12stmd/). The sensor in this case will be on the sensor head board. So will I be able to just connect the pins from the headboard to the appropriate pins on DC_P1 and DC_P2 and get it to work?

Is your sensor also part of some test platform like this or have you got a custom solution?

Thanks!

Regards,

Akshay

0 ellen wang over 13 years ago in reply to Akshay Panday

Intellectual 635 points

No matter which kind of sensor you're using.

Images are capture by digital_data(8~16 bits) , VD , HD and pixclk .

I don't know what the demo kit looks like .

But you just have to connect the signal I mentioned ,and you can get the image .

BTW , I just have the "sensor" like the datasheet mt9v034c12 (page.80)

and connect the resisters , capacitors....etc like page.9 by myself.

Then connect digital_data , VD , HD and pixclk to DC_P1 and DC_P2 .

It's a good way to let you know the principle of a camera and how it works .

Best regards.

Ellen.

0 Akshay Panday over 13 years ago in reply to ellen wang

Expert 1640 points

Hi Ellen,

Thanks for your assistance. I'll give this a try and see how it goes.

Regards,

Akshay

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dm6437 rawcapture problem