Please find some rechearch I've done in video ... what you can be acheived ... real time of course ... step by step :

( Videos from my FB page with public share )

Step 1 : https://goo.gl/fwSoK6
Step 2 : https://goo.gl/XoEfs4
Step 3 : https://goo.gl/GThJvU
Step 4 : https://goo.gl/bPfpvN

Out of ...

Hi Aromo1,

Sure, here is the link : https://github.com/igrr/esp32-cam-demo

I take the opportunity to add an update on SPI vs DMA vs 4Kb limit. This is solved in esp-idf latest release
( spi_bus_config_t > max_transfer_sz ). Everything works fine now, one call for a full frame transfert using
DMA ...

Hi Sprite,

Thx for your feedback, yes I'm using esp-idf driver.

Looking forward for your update on the spi driver without this 4K limitation and indeed transfert entirely in DMA is the way to go.

Regarding I2S, thank you for the code ... good starting point :-) ... will update this post on both ...

Hi Everyone,

I'm looking for the most efficient solution to interface an TFT screen to the ESP32.

SPI Pro > Working fine @ 80MHz > Full screen update 320 x 240 ( 153600 Bytes ) in 16.80ms and only a few GPIO Used
SPI Cons > DMA transfert limited to ~ 4Kb ... CPU busy to transfert block by block ...