can anyone help me to interface TW9990 (video Decoder ) ic with STM32H7xxx Controller

[Andrew Neil]

What "help", exactly, do you need?

What have you done so far? Where are you stuck?

How To Interface Anything to Anything Else

[Tesla DeLorean]

Perhaps your colleagues, or FAEs at Intersil/Renasas, or contractors/consultants they can refer you too?

Start with a full-form data sheet. Looks to be an "I2C" connection.

What exactly are you looking for it to do in this H7 system?

NTSC/PAL seems like a bit of a cul-de-sac at this point, check the long term availability for the device

[Asing.4]

i am able to communicate TW9990 via I2C , Now i am facing issue to convert data YCbCr to ARGB8888. I am using CubeMX for code generation of DCMI. configuration is below in snap

 

I got a reference code from examples what it seems it tacking data in RGB656

**************code is below *******************

void BSP_CAMERA_LineEventCallback(void)

{

 static uint32_t tmp, tmp2, counter;

 if(ysize > counter)

 {

  LCD_LL_ConvertLineToARGB8888((uint32_t *)(CAMERA_FRAME_BUFFER + tmp), (uint32_t *)(LCD_FRAME_BUFFER + tmp2));

  tmp = tmp + xsize*sizeof(uint16_t); 

  tmp2 = tmp2 + xsize*sizeof(uint32_t);

  counter++;

 }

 else

 {

  tmp = 0;

  tmp2 = 0;

  counter = 0;

 }  

**********************************************************

please let me know what should i change to convert data YCbCr to ARGB8888? or let me know if other things i have to done?

[Andrew Neil]

@Community member​ "i am facing issue to convert data YCbCr to ARGB8888"

That has nothing to do with the STM32 - the conversion would be exactly the same whatever platform you use.

Have you looked at the support available from the chip manufacturer?

 

"I got a reference code from examples"

Where, exactly, did you get that? Is it actually applicable to this chip?

EDIT

Have you studied this:

https://www.st.com/resource/en/application_note/an5020-digital-camera-interface-dcmi-on-stm32-mcus-stmicroelectronics.pdf

[Asing.4]

i am able to communicate TW9990 via I2C , Now i am facing issue to convert data YCbCr to ARGB8888. I am using CubeMX for code generation of DCMI. configuration is below in snap

 

I got a reference code from examples what it seems it tacking data in RGB656

**************code is below *******************

void BSP_CAMERA_LineEventCallback(void)

{

 static uint32_t tmp, tmp2, counter;

 if(ysize > counter)

 {

  LCD_LL_ConvertLineToARGB8888((uint32_t *)(CAMERA_FRAME_BUFFER + tmp), (uint32_t *)(LCD_FRAME_BUFFER + tmp2));

  tmp = tmp + xsize*sizeof(uint16_t); 

  tmp2 = tmp2 + xsize*sizeof(uint32_t);

  counter++;

 }

 else

 {

  tmp = 0;

  tmp2 = 0;

  counter = 0;

 }  

**********************************************************

please let me know what should i change to convert data YCbCr to ARGB8888? or let me know if other things i have to done?

[Asing.4]

as JPEG Decoder example(stm32h743), it decode the jpeg buffer into YCbCr buffer and DMA2D_copy_Buffer () function convert YCbCr in to RGB.

in my project i tried start DMA of DCMI to get ycbcr output and pass the address of YCbCr buffer address to DMA2D_copy_Buffer () but i am not getting RGB output

if(HAL_DCMI_Start_DMA(&hdcmi, DCMI_MODE_CONTINUOUS,JPEG_OUTPUT_DATA_BUFFER, 0x0f00000)!=HAL_OK)
 
 {
 
 Error_Handler();
 
 }
 
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
void HAL_DCMI_LineEventCallback(DCMI_HandleTypeDef *hdcmi)
 
{
 
 /* Prevent unused argument(s) compilation warning */
 
 UNUSED(hdcmi);
 
 /* NOTE : This function Should not be modified, when the callback is needed,
 
      the HAL_DCMI_LineEventCallback could be implemented in the user file
 
  */
 
 DMA2D_CopyBuffer((uint32_t *)JPEG_OUTPUT_DATA_BUFFER, (uint32_t *)LCD_FRAME_BUFFER, 0 , 0, 648, 488 ,JPEG_422_SUBSAMPLING);
 
 xa=0;
 }

[Andrew Neil]

[Pavel A.]

> but i am not getting RGB output

So what are you getting? Where it fails?

[Asing.4]

as JPEG Decoder example(stm32h743), it decode the jpeg buffer into YCbCr buffer and DMA2D_copy_Buffer () function convert YCbCr in to RGB.

in my project i tried start DMA of DCMI to get ycbcr output and pass the address of YCbCr buffer address to DMA2D_copy_Buffer () but i am not getting RGB output

if(HAL_DCMI_Start_DMA(&hdcmi, DCMI_MODE_CONTINUOUS,JPEG_OUTPUT_DATA_BUFFER, 0x0f00000)!=HAL_OK)
 
 {
 
 Error_Handler();
 
 }
 
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
void HAL_DCMI_LineEventCallback(DCMI_HandleTypeDef *hdcmi)
 
{
 
 /* Prevent unused argument(s) compilation warning */
 
 UNUSED(hdcmi);
 
 /* NOTE : This function Should not be modified, when the callback is needed,
 
      the HAL_DCMI_LineEventCallback could be implemented in the user file
 
  */
 
 DMA2D_CopyBuffer((uint32_t *)JPEG_OUTPUT_DATA_BUFFER, (uint32_t *)LCD_FRAME_BUFFER, 0 , 0, 648, 488 ,JPEG_422_SUBSAMPLING);
 
 xa=0;
 }