read multiple images and store in different loacations

HI,

  I am using tms320dm6437EVM board .I am trying to grab three frames from camera in Y:Cb:Cr format and store just Y component of them in 2-dimensional variables.

this is the code i use to capture thee different images and store this images in three different variables  int  I_frame[720][480],int B_frame[720][480],int P_frame[720][480],

I have wriiten code here (supposed to work this way) which will capture image from camera and store it in I_frame and display it then after some delay it will capture different image from camera and store it in B_frame and display it  and then will capture different image from camera and store it in P_frame and display it 

But I see that  delay is appear just once after that it doesn't appear. So I dont get three different images .

Can you please tell me Am I doing right way or what is right way to capture images and store it in variables.?

Thanks

CODE:

while (status==0 && flag<3) 

  {

      for (i = 0;i <100000 ;i++)                  //this loop is here

                      {

                            for (j = 0;j < VECTOR_SIZE;j++)      //to insert delay so

                            {

                              }                                    //image can be changed on camera

                       }                                        //

FVID_exchange(hGioVpfeCcdc, &frameBuffPtr); //this function capture image and

                                                                                       // store it on  frameBuffPtr->frame.frameBufferPtr

get_frame((frameBuffPtr->frame.frameBufferPtr)); //this will get Y component of image and store in read_frame[720][480]

              if(flag==0)

                 {

                 memcpy(I_frame,read_frame,sizeof(read_frame));  //copy captured image in I_frame

                  memcpy(write_frame,I_frame,sizeof(write_frame)); //copy I_frame in write_frame so can be displayed 

                 }                                                                                              //using display_frame function

              else if (flag==1)

              {

                memcpy(B_frame,read_frame,sizeof(read_frame));   //copy captured image in B_frame

                memcpy(write_frame,B_frame,sizeof(write_frame));//copy B_frame in write_frame so can be displayed 

              }                                               //using display_frame function

             else

             {

              memcpy(P_frame,read_frame,sizeof(read_frame));  //copy captured image in P_frame

              memcpy(write_frame,P_frame,sizeof(write_frame));//copy P_frame in write_frame so can be displayed 

               }                                               //using display_frame function

        display_frame((frameBuffPtr->frame.frameBufferPtr));      //write data from write_frame to &frameBuffPtr

        FVID_exchange(hGioVpbeVid0, &frameBuffPtr);               //display the image

flag=flag+1;

}

void get_frame (void * frame)

{

int j,k, n;

n = 1;

for (j = 0;j < 720;j++)

{

   for (k = 0;k < 480;k++)

   {

        read_frame[j][k]= * (((unsigned char * )frame)+n);

n=n+2;

   }

}

}

void display_frame (void * frame)

{

int j,k, n;

n = 1;

for (j = 0;j < 720;j++)

{

   for (k = 0;k < 480;k++)

   {

        * (((unsigned char * )frame)+n)=write_frame[j][k];

* (((unsigned char * )frame)+n+1)= 128;

n=n+2;

   }

}

}

HI,

From this webpage (http://wiki.davincidsp.com/index.php?title=Accessing_pixels_in_a_frame_on_DM643x) i think to capture fresh frame for process which is currently available on camera screen, I have to invalidate cache every time I call FVID_exchange.

Can any one please tell me how to invalidate cache in dm6437?

Thanks

Satya, Thank you for providing all the information. I will forward this to our BIOS team. They should be able to comment.

I'll ask the PSP team to weigh in...