why ili9341 used with ltdc in stm32f429 discovery?

[rsharifi9]

Dear All,

I am confused with using LTDC working with ili9341 in the discovery f429.

LTDC is an tft controller. so I expect there is not required and extra external controller.

what is the issue?

Best regards, Ras

[waclawek.jan]

The 'F429 Disco with using a controller which supports both autonomous and "slave" functionality, showcases both the LTDC and LTDC-less operation. You might want the latter to save bandwidth on the internal buses of 'F4xx if your application is computationally intensive (and use the somewhat cheaper 'F427, and potentially save also the external SDRAM and pins to connect it, to counterweight the higher cost of the controller).

In other words, on this DISCO, you can easily try, whether your application is better off using LTDC or a TFT controller.

JW

[rsharifi9]

in the examples provided in cubemx repository, the ili9341 files are used within the projects to show LTDC!?

[rsharifi9]

Thank you JW,

what is the advantages of the LTDC-less ( ili9341 ) solution?