vd55g1 - no data in stream mode

[eureka]

Hi, I'm currently facing a challenge with the VD55G1 driver. I've designed my own minimal system board for the N6 and VD55G1, using MIPI CSI for communication. When attempting to drive the VD55G1, I can enter the stream mode but no data is being transmitted (the N6 interrupt is not triggered). Upon reading the stream_fsm register of the VD55G1, I noticed it remains stuck in the dark task, with the REPEAT_COUNT, CURRENT_CONTEXT, and NEXT_CONTEXT values consistently showing 0 0 1.

Here is my code

testfsm means getting the value of the stream_fsm register.

I would greatly appreciate your prompt assistance in resolving this issue. Thank you.

[CyrilTechPro]

Hi eureka

Difficult to debug like that could be a lot of think.

could you share a bit more information about Hardware and Software : 

-Hardware: could you provide clock information and power domain or schematics 

-Software : could you share sensor configuration you use.

Thanks in advance 

bye 

[eureka]

Hello, i am so grateful for your reply.

About hardware:

camera part:

power supply part:

MCU part

About software:

[eureka]

[astral256]

It looks like you have GPIO0 set to VT_SLAVE_MODE but you don't actually toggle GPIO0 to initiate the start of each frame.  If I understand UM3224(How to integrate and configure the VD55G1 sensor) correctly, setting GPIO0 to this value uses the FRAME LENGTH parameter as a "maximum frame rate" and it instead waits for a pulse on GPIO0 to begin each frame.  If you never toggle GPIO0 (PG15 on your schematic) then it will never send out a frame.