STM769 - Disco HDMI PROBLEM

Question

Hi,

I have a STM32F769- DISCO I bought an adapter for it

"B-LCDAD-HDMI1" after connecting the HDMI cable to the monitor I have no image at all the monitor displays the message "No signal" I will also mention that the LCD monitor attached to the set together with STM32F769 -DISCO the image is displayed, please help.

J use Embedded Wizard  please help

Answer 1

Hello,

the B-LCDAD-HDMI1 adapter board requires that the MIPI/DSI controller is running in video mode. The MIPI/DSI display mounted on the STM32F769-Discovery board is typically driven in command mode.

In principle, you can adapt the display intialization and the display update in order to use video mode instead of command mode. But this will not be an easy thing and you need a suitable driver / initialization sequence for the DSI controller mounted on the adapter board.

As far as I know, you will find examples for video mode within the STM32F7 cube firmware - maybe these video mode examples works with the adapter. 

So far I did not use this adapter and I assume that the intialization has to be adapted to the dedicated DSI controller mounted on the adpater. See also this answer.

Best regards,

Manfred.