TouchGFX gray 4 to RGB565

[KRega.1]

I'm using TouchGfx in Gray 4 mode. I have read the GFX documentation and I can't find the answer. I can't figure out how the data is stored in RAM. Consequently, I need to convert this Gray 4 to RGB565 to my FMC 16bit 8080 TFT-LCD. Any ideas how to do this? or additional references I should be reading? I'm using a 480 x 854 LCD.

Here is a failed attempt..

void TouchGFXHAL::copyFrameBufferBlockToLCD(const Rect rect)
{
 __IO uint16_t* ptr;
 int16_t row;
 
 // For Gray4 only 4 bits per pixel
 for (row = 0; row < (rect.width) ; row++)
 {
 ptr = getClientFrameBuffer() + rect.y + (row+ rect.x) * 120; // 480 x 854 LCD
 LCD_IO_WriteMultipleDataGrey4((uint16_t*)ptr, 120);
 } 
}
 
 
 void LCD_IO_WriteMultipleDataGrey4(uint16_t* pData, uint32_t Size)
 {
 uint32_t i;
 
 for (i = 0; i < Size; i++)
 { //			R 5bits					G 6bits B 5 bits
 FMC_BANK1_WriteData( ((pData[i]&0xF000)<<0) | ((pData[i]&0xF000)>>5) | ((pData[i]&0xF000)>>12) );
 
 FMC_BANK1_WriteData( ((pData[i]&0x0F00)<<4) | ((pData[i]&0x0F00)>>0) | ((pData[i]&0x0F00)>>8) );
 
 FMC_BANK1_WriteData( ((pData[i]&0x00F0)<<8) | ((pData[i]&0x00F0)<<5) | ((pData[i]&0x00F0)>>4) );
 
 FMC_BANK1_WriteData( ((pData[i]&0x000F)<<12) | ((pData[i]&0x000F)<<10) | ((pData[i]&0x000F)>>0) );
 }
 }

[MM..1]

Your shifting nums >> << isnt right, check :beaming_face_with_smiling_eyes:

[KRega.1]

 for (i = 0; i < Size; i++)
 { //							R 5bits					G 6bits B 5 bits
 FMC_BANK1_WriteData( ((pData[i]&0xF000)<<0) | ((pData[i]&0xF000)>>5) | ((pData[i]&0xF000)>>11) );
 
 FMC_BANK1_WriteData( ((pData[i]&0x0F00)<<4) | ((pData[i]&0x0F00)>>1) | ((pData[i]&0x0F00)>>7) );
 
 FMC_BANK1_WriteData( ((pData[i]&0x00F0)<<8) | ((pData[i]&0x00F0)<<3) | ((pData[i]&0x00F0)>>3) );
 
 FMC_BANK1_WriteData( ((pData[i]&0x000F)<<12) | ((pData[i]&0x000F)<<7) | ((pData[i]&0x000F)<<1) );
 
 }

ok this is correct now, right?

Thanks, Kevin

[MM..1]

Seems right now, and too exist second choice use DMA2D L4 CLUT conversion for offload MCU. This enable choice some colors not only gray...