How to configure Downsize of DCMIPP pipe1 with STM32CubeMX

[JaeLee]

I'm using STM32N6570-DK board and developing an image processing application.
When I tried to use STM32CubeMX to generate the project, I was able to set DCMIPP Pipe1 just like the attached screen capture.
I would like to downsize the source image data to 800x480, but I could not find the option field in the DCMIPP Configuration view in STM32CubeMX.
Is there something that I missed?

My STM32CubeMX is Version 6.16.1 for Windows 11.

 

[Mahmoud Ben Romdhane]

Hello @JaeLee 

Let me thank you for posting.

I am currently checking this behavior and I will get back to you ASAP.

Thanks

Mahmoud

[Mahmoud Ben Romdhane]

Hello @JaeLee ,

On STM32N657 devices, the DCMIPP peripheral does not support image scaling (downsize or upsize). DCMIPP is limited to image capture, pixel format conversion, but it does not include a hardware resizer.

For this reason, STM32CubeMX does not provide any configuration fields to set an output resolution such as 800×480 in the DCMIPP configuration view.

Thanks.

Mahmoud

[Mikk Leini · Accepted solution]

 @JaeLee check the example code:

https://github.com/STMicroelectronics/STM32CubeN6/blob/1fc803683e03b0ce78e64523441d31acd0db2829/Projects/STM32N6570-DK/Applications/DCMIPP/DCMIPP_ContinuousMode/FSBL/Src/main.c#L333

Basically you have to write DCMIPP initialization/configuration code yourself.

To understand the math behind ratio and division numbers, check N6 reference manual chapters:

39.14.71 DCMIPP Pipex downsize configuration register (DCMIPP_PxDSCR)

39.14.72 DCMIPP Pipex downsize ratio register (DCMIPP_PxDSRTIOR)