How to read .bin file for Touchgfx

[Datome]

Normally I can display all projects of touchgfx (which can be stored in internal memory) on my touchscreen without any problem.

For a larger project I needed to use a SD card. For this purpose, I compiled all the images into a .bin file and then saved it to SD card. I try to use blockcopy function as shown below but all I get is just a black screen.

To sum up, I dont know how to call the images. it will be appreciated if someone correct the mistakes or shift me to the the correct way.

bool TouchGFXHAL::blockCopy(void* RESTRICT dest, const void* RESTRICT src, uint32_t numBytes)
{
	uint32_t dataOffset = (uint32_t)src;
	if (dataOffset >= 0x9A000000 && dataOffset < 0xA0000000)
	{
		int fd;
 
		if(f_mount(&myFatFs,SDPath,1) == FR_OK)
		  {
			  if (f_open(&myFile,"images.bin",FA_OPEN_EXISTING | FA_READ) == FR_OK)
			  {
				     fd = open("images.bin", O_RDONLY, 0);
				     dataOffset =  dataOffset - 0x9A000000;
				     lseek(fd, dataOffset, SEEK_SET);
				     read(fd, (uint8_t *)dest, numBytes);
				     close(fd);
			  }
				 return true;
		  }
 
	        else { return false;}
	}
 
    else
    { return HAL::blockCopy(dest, src, numBytes);   }
 
}

for initialization ;

void TouchGFXHAL::initialize()
 
{
 
   uint16_t* cacheStartAddr = (uint16_t *) malloc(0x3000000);
 
   uint32_t cacheSize = 0x3000000; 
 
  Bitmap::removeCache();
 
  Bitmap::setCache(cacheStartAddr,cacheSize,1024);
 
  Bitmap::cacheAll();
 
 
}

[MM..1]

You debug your code fread?

[Datome]

I saw that it enters the Bitmap::cacheAll(); but does not pass it over and stays there.

and it doesnot enter the blockcopy function.

[MM..1]

void TouchGFXHAL::initialize()
{
    // Calling parent implementation of initialize().
    //
    // To overwrite the generated implementation, omit call to parent function
    // and implemented needed functionality here.
    // Please note, HAL::initialize() must be called to initialize the framework.
 
    TouchGFXGeneratedHAL::initialize();
}

[Datome]

Sorry I forgot to paste it (TouchGFXGeneratedHAL::initialize();) into the code section of the question. it is already there.

[Datome]

void TouchGFXHAL::initialize()
{
 
    TouchGFXGeneratedHAL::initialize();
 
    uint16_t* cacheStartAddr = (uint16_t *) malloc(0x1400000);
    uint32_t cacheSize = 0x1400000; //20 MB, as example
 
    Bitmap::removeCache();
    Bitmap::setCache(cacheStartAddr,cacheSize,1024);
    Bitmap::cacheAll();
 
}

[MM..1]

Maybe you dont understand cache please apply Caching Bitmaps | TouchGFX Documentation

or turn off caching and solve SDCARD first...

[Vahid Ajallooeian]

To clear the problem, which part have you stucked in?

Reading data from sd card?

Coping data from sd card to ram?

Display the image?

Match the image into touchgfx?

[Datome]

I think the problem is related to the initialization coz after executing the cacheAll() , it doesnot get out from the initialize function. so it seems I need to understand caching process or find a sample code.

[MM..1]

Realy your LD file and clibs can alloc this?

    uint16_t* cacheStartAddr = (uint16_t *) malloc(0x1400000);
    uint32_t cacheSize = 0x1400000; //20 MB, as example