Re: I have a problem with Video in out kit 561

Hi,

I fill in the missing chroma information in here:

j = 0;                    //          Make a copy of Cb and Cr components

                                        //          and retrieve the missing pixels

          for (i = 0; i < (720*576); i += 2)

          {

                    Y[i] = Ptr[j+1];

                    Y[i+1] = Ptr[j+3];

 

 

                    Cb[i] = Ptr[j];

                    temp = (short) Ptr[j] + (short) Ptr[j+4];

                    Cb[i+1] = (unsigned char) (temp >> 1);

 

 

                    Cr[i] = Ptr[j+2];

                    temp = (short) Ptr[j+2] + (short) Ptr[j+6];

                    Cr[i+1] = (unsigned char) (temp >> 1);

 

 

                    j += 4;

          }

 

And thanks for your help,

I change PIXEL_PER_LINE to 864, then in file PPI0_Init.c, I change sizeof(short)  to 3

#include "main.h"

 

 

/********************************************************************************/

/***** InitPPI0() *****/

/***** PPI0 is configured for video in in 656 mode *****/

/***** This routine configures both the PPI and the associated DMA channel *****/

/***** Supports Entire Field and active video only, as well as 8 and 32 bit *****/

/***** packing according to the input parameters *****/

/***** DMA is setup in descriptor list mode, input is pointer to 1st header *****/

/********************************************************************************/

 

 

void InitPPI0(bool entire_field, bool pack32, tDMA_descriptor* First_Header, short pixel, short lines)

{ short transfer_length_bytes = ((pack32) ? 4 : 1);

 

 

  // configure PPI0 - not enabled yet

  *pPPI0_CONTROL = (entire_field << 2) | FLD_SEL | (pack32 << 7)| (pack32 << 8);

  *pPPI0_FRAME = lines;

  ssync();

 

 

  // configure DMA for PPI0 - not enabled yet

  *pDMA1_0_START_ADDR=0x00;

  *pDMA1_0_X_COUNT = pixel * sizeof(short) / transfer_length_bytes; // 2 bytes for each pixel, count divided by four if 32-bit DMA transfers are done

  *pDMA1_0_Y_COUNT = lines;

  *pDMA1_0_X_MODIFY = transfer_length_bytes;

  *pDMA1_0_Y_MODIFY = transfer_length_bytes;

  *pDMA1_0_NEXT_DESC_PTR = First_Header;

  *pDMA1_0_CONFIG = 0x7000 | 0x0400 | DI_EN | RESTART| DMA2D | (pack32 << 3) | WNR;

 

  ssync();

 

}

 

 

 

 

void DisablePPI0(void)

    {

    // disable transfers

    *pPPI0_CONTROL &= ~PORT_EN;

    ssync();

    *pDMA1_0_CONFIG &= ~DMAEN;

    ssync();

    }

 

 

 

 

void EnablePPI0(void)

    {

    // enable transfers

    *pDMA1_0_CONFIG |= DMAEN;

    ssync();

    *pPPI0_CONTROL |= PORT_EN;

    ssync();

    }

 

Now the 1/3 picture that I get is correct and 2/3 still have errors

What do I need to do next ?

Please give me more advices, your advices always help me to solve something.

Thank you once more.