Hi,
on a 800*480 display, driven by BT815, I made a background image and 20 icons of 100x100 pixels. All images are converted to 8x8 ASTC and reside in flash.

When this screen activates, all images are show up OK, but the screen flickers quite annoyingly. This slowly disappears: after about 15 seconds the screen is stable and I can switch between screens without any flicker.

If I start the display without the icons, but just the background, it shows up almost stable, but activating the icons in the first 15 seconds causes visible fading flicker. Using less compression for the background, and so more data, makes the flicker heavier and longer.

I just cannot grasp what is wrong with it. If the graphic engine is overloaded, how come the flicker disappears? Anyone any ideas?
thx.
Henk

Hi,
I am testing a newly developed board with BT815 and external flash (W25Q128JVSIQ). It is a bare metal board without any link to the "EVE asset builder" utilities.

The display is functioning OK, and I can write text and images from RAM_G. Next step is to show ASTC images from flash, but I cannot get the flash into fast mode. After initialization, REG_FLASH_STATUS = 2 (FLASH_STATUS_BASIC) and CMD_FLASHFAST returns error 0xE002 (no header detected).
I then tried to write the unified.blob file from the "EVE asset builder" directory into the flash using CMD_FLASHUPDATE, dest = 0x800000, src = 0, num=4096 and this returns OK, and I can even read the blob data back from flash, but still CMD_FLASHFAST returns 0xE002.

Does anyone know how to do this? Is there any detailed information about this unified.blob and how to install it? I cannot find it anywhere.
Help is much appreciated,
Thanks, Henk